The nanometer inorganic composite film of TiO₂, SiO₂/TiO₂,Fe₂O₃/TiO₂, Fe₂O₃/SiO₂/TiO₂, the nanometer polymer-inorganic composite films of PEG-TiO₂, PVA-TiO₂, PAM-TiO₂, MC-TiO₂, and the nanometer polyethylene glycol-multiple inorganic composite film of PEG-Fe₂O₃/TiO₂, PEG-SiO₂/TiO₂, PEG-Fe₂O₃/SiO₂/TiO₂ were prepared by the sol-gel method and dip-coating way in this master dissertation. The morphology and structure of the thin film was characterized by X-ray powder diffraction （XRD）, Scanning Electronic Diffraction （SEM）, thermal analysis （DSC） and UV-vis spectra of transmittance （UV-vis）. The hydrophilic activity, the photocatalytic activity to the low concentration methylene blue solution, the adhesion to the substrate glass, the transmittance and the chemical stability of film were studied,. The ultraviolet-visible spectrop hotometer from the wavelength 300 run to 900 nm was measured and analyzed.Results indicated that the hydrophilic activity and photocatalytic activity of SiO₂/TiO₂、Fe₂O₃/TiO₂ composite thin films were superior to the pure TiO₂ film.The hydrophilic activity and photocatalytic activity of thin films increased with the increasing of heating temperature.When heat treatment temperature was 500℃and sintering time was 2 h, the hydrophilic activity and photocatalytic activity of thin films were optimal. XRD patterns showed that the crystal form of TiO₂ was anatase after adding SiO₂, Fe₂O₃, and the average diameter was diminished. The UV-vis spectra of transmittance showed that Fe₂O₃ caused the absorption wavelength to move to long wavelength.Effects of the stuff prescription and the process parameters on the hydrophilic activity and photocatalytic activity of ternary inorganic composite thin films were studied. The optimal prescription was that the content of Fe₂O₃ was 0.25 %, and SiO₂ was 20 %, The optimal process parameter was that the treatment temperature was 500℃and sintering time was 2 h. Under these optimal conditions, the ternary inorganic composite thin films of Fe₂O₃/SiO₂/TiO₂ had best hydrophilic activity and the photocatalytic activity.Polyacryamide, polyvinyl alcohol, polyethylene glycol and methocel were added to improve the hydrophilic activity and the photocatalytic activity of TiO₂ film and inorganic composite film. The polymer-inorganic composite film of PEG-TiO₂, PVA-TiO₂, PAM-TiO₂ and MC-TiO₂ were prepared. The effects of the stuff prescription and the process parameter were researched. The results showed that the PEG-TiO₂ film had the best hydrophilic activity and photocatalytic activity under the condition of the PEG molecular weight 1000 and the dosage of PEG 2.5 g. L^-1.SEM image also showed that the added PEG had produced uniform hole in the surface of TiO₂ film, and the number and the size of holes increased with the increasing of the molecular weight and quantity.Meanwhile, the polymer-inorganic composite films of PEG-Fe₂O₃/TiO₂, PEG-SiO₂/TiO₂ and PEG-Fe₂O₃/SiO₂/TiO₂ were prepared too, and these films had the better hydrophilic activity and photocatalytic activity than those of above. For the PEG-Fe₂O₃/SiO₂/TiO₂ composite thin film prepared, the average diameter of TiO₂ particles was 5.3 nm and the content of rutile phase was 0. The performance parameters studied showed that the adhesion to the substrate glass, the transmittance, the chemical stability of film of the polymer-inorganic composite film were good to meet the demand.

To improve photocatalytic ability of TiO₂ catalyst, N or Fe ions were involved in the crystal of TiO₂ via sol-gel method used urea or Fe（NO₃）₃·9H₂O as the doping which brought the visible-light sensitization of TiO₂ catalyst, and studied the different effect mechanism of nonmetal and metal doping. To evaluate the research of industrialisation application, the photooxidation of industrial waste was carried out in a series of experiments. The primary study was listed as following:（1） Calcined at 400℃in air atmosphere, as-prepared N/TiO₂ catalysts are entirely anatase phase. The surface of as-prepared N/TiO₂ catalyst is 109.1 m²·g^-1. average pore size is 69.9 nm, and the grain pathway is about 17.7 nm. Better surface structural improve the adsorption power of the pollutants, and the catalysts show high photocatalytic activity. The optimum N-content in N/TiO₂ is dertermined as 2.98 at.%. Moreover, the light absorption of as-prepared N/TiO₂ shows red-shift to 435 nm, the band gaps is determined to be 2.85 eV. The nitrogen atom enters into the TiO₂ lattice, occupies the position of oxygen atom, forms the bond of N-Ti-O, narrows the band gaps and makes as prepared N/TiO₂ shifted into the visible ragion.（2） In as-prepared Fe/TiO₂ catalysts, the optimum Fe-content is dertermined as 0.64 at.%. The Fe-doping not only depresses the grain growth of TiO₂ particles, but also reduces the phase transformation temperature of anatase to rutile. Calcined at 300℃in air atmosphere, as-prepared Fe/TiO₂ catalysts are anatase phase, the grain pathway is about 8 nm. The surface of as-prepared Fe/TiO₂ catalysts is 91.3 m²·g^-1, average pore size is 57.9 nm. The existence of Fe changes the surface structure of catalysts, which consequently reduces the chance of the recombination of the photoinduced electrons and holes. Calcined in air atmosphere at the temperature of 400℃, the light absorption of as-prepared Fe/TiO₂ shows red-shift to 459 nm, the band gaps reduces to 2.7 eV. The promoting effect of Fe-doping on the photocatalytic activity could be attributed to the formation of intermediate energy level that allows Fe/TiO₂ to be activated easily in the visible area.（3） In the multiphase photocatalysis reaction system, The application of photocatalysis is studied through the photodegradation of industrial waste diluted 1 times in oxygenated aqueous suspensions containing as-prepared TiO₂. The experiment result shows: after 180 minutes’ photoreaction, the degradation rate of TOC is higher than 80%. The concentration of TOC falling demonstrated the organic pollutants in the industrial waste were photodegraded. The total carbon in the system falling is due to the final outcome CO₂ departing from the reaction system, but TN has no change, this indicated the N element of the organic pollutants were not photodegraded to be N₂. The 10% degradation rate of Pb²⁺ in the industrial waste is owing to the adsorption ability of the as-prepared photocatalyst.

To improve photocatalytic ability of TiO₂ catalyst, N or Fe ions were involved in the crystal of TiO₂ via sol-gel method used urea or Fe（NO₃）₃·9H₂O as the doping which brought the visible-light sensitization of TiO₂ catalyst, and studied the different effect mechanism of nonmetal and metal doping. To evaluate the research of industrialisation application, the photooxidation of industrial waste was carried out in a series of experiments. The primary study was listed as following:（1） Calcined at 400℃in air atmosphere, as-prepared N/TiO₂ catalysts are entirely anatase phase. The surface of as-prepared N/TiO₂ catalyst is 109.1 m²·g^-1. average pore size is 69.9 nm, and the grain pathway is about 17.7 nm. Better surface structural improve the adsorption power of the pollutants, and the catalysts show high photocatalytic activity. The optimum N-content in N/TiO₂ is dertermined as 2.98 at.%. Moreover, the light absorption of as-prepared N/TiO₂ shows red-shift to 435 nm, the band gaps is determined to be 2.85 eV. The nitrogen atom enters into the TiO₂ lattice, occupies the position of oxygen atom, forms the bond of N-Ti-O, narrows the band gaps and makes as prepared N/TiO₂ shifted into the visible ragion.（2） In as-prepared Fe/TiO₂ catalysts, the optimum Fe-content is dertermined as 0.64 at.%. The Fe-doping not only depresses the grain growth of TiO₂ particles, but also reduces the phase transformation temperature of anatase to rutile. Calcined at 300℃in air atmosphere, as-prepared Fe/TiO₂ catalysts are anatase phase, the grain pathway is about 8 nm. The surface of as-prepared Fe/TiO₂ catalysts is 91.3 m²·g^-1, average pore size is 57.9 nm. The existence of Fe changes the surface structure of catalysts, which consequently reduces the chance of the recombination of the photoinduced electrons and holes. Calcined in air atmosphere at the temperature of 400℃, the light absorption of as-prepared Fe/TiO₂ shows red-shift to 459 nm, the band gaps reduces to 2.7 eV. The promoting effect of Fe-doping on the photocatalytic activity could be attributed to the formation of intermediate energy level that allows Fe/TiO₂ to be activated easily in the visible area.（3） In the multiphase photocatalysis reaction system, The application of photocatalysis is studied through the photodegradation of industrial waste diluted 1 times in oxygenated aqueous suspensions containing as-prepared TiO₂. The experiment result shows: after 180 minutes’ photoreaction, the degradation rate of TOC is higher than 80%. The concentration of TOC falling demonstrated the organic pollutants in the industrial waste were photodegraded. The total carbon in the system falling is due to the final outcome CO₂ departing from the reaction system, but TN has no change, this indicated the N element of the organic pollutants were not photodegraded to be N₂. The 10% degradation rate of Pb²⁺ in the industrial waste is owing to the adsorption ability of the as-prepared photocatalyst.

Photocatalysis of semiconductors is a widely investigated subject during the past 30 years.Among them,titanium dioxide is the most latent material for its chemical stability,wearibility,low cost and innocuity.At the same time,some of the low-E thin films like AZO is photo-catalytic themselves.However,for their instability,they are not suitable to be photo-catalytic agent directly.Coupling these low-e films with TiO₂ thin films could prevent corrosion of the AZO and enhance photo-catalytic performance of the whole composite films.But simply coupled films doesn’t make full use of the light-induced charges in the under-layer of the coupled films.This article determine to make the AZO under-layer partly exposed by different ways, and achieve an enhanced photo-catalytic performance.AZO films,TiO₂ films and their composite films are prepared by magnetron sputtering,and pretreated by PVA solution,or post-treated by annealing and plasma.Microstructure are investigated by XRD,SEM and optical microscopy;electrical performance are measured by FOUR-POINT PROBE METER;optical performance is investigated by UV-vis Spectrometer;and photo-catalytic performance is measured by the degradation of Rodanmine B under UV light in 2 hours.AZO films prepared by sputtering exhibit a relatively low resistance.After being treated by different plasma,the surface morphology behaves huge changes.Especially, N and Ar plasma treatment cause holes of different size and shape on the surface of the films.This phenomenon may be used to realize AZO under-layer exposure.AZO under-layer exposed composite films are obtained by pre-spraying of PVA solution.Such films turn out superior photo-catalytic performance to the simply composite films.Dip Such PVA treated composite films into AgNO₃ and Na₂S solution respectively,irradiate them with UV light for 45minutes’,and then, precipitation of Ag and S appears on the exposed AZO part.That means,Magnetron sputtering AZO films are more active than TiO₂ films.But Ag and S has a different distribution.The amount of Ag precipitation has a ascendant grads toward the centre, but the amount of S precipitation has a ascendant grads outward the centre.As indicated by the following equations,Ag⁺+e^-→Ag↓and S^2-+2h⁺→S↓,Ag distribution exhibits e^- distribution and S distribution exhibits h⁺ distribution.That means light excitated h⁺ is drifted to the AZO side,and e^- to the TiO₂ side.Take the size of S precipitation enrichment into consideration,we anticipate the Optimum size of the exposed area is 10 micron.Ag⁺,S^2-are proved to be developer of the distribution of e^-,h⁺ respectively.Annealed AZO-TiO₂ composite films exhibit better photocatalysis even than the PVA treated ones.Higher crystallization of AZO under-layer is proved by XRD,and exposed AZO under-layer is also confirmed in such films.

The problem of environment and energy become more and more serious now.All over the world focus the problem and try to deal it.Titanium dioxide,as an excellent photocatalytic materials is researched thoroughly because of low price,non-toxic,high catalytic efficiency and easy to operate.However,weak visible spectral response and fast recombination rate of photo-generated electron-hole pair limits its application in practice.So the research to enhance the visible light activity is very important in this field.N-doped was a possible method to improve its’ visible light activity.The process of high-heat treatment limited the application of TiO₂.Based on the actuality,the preparation and properties of triethylamine modified titanium dioxide film in room-temperature was posed in this paper.The TiO₂-sol in anatase phase was synthesized at room temperature through sol-gel method.In this study,butyl titanate was used as precursor,ethanol as impregnate and HCl as catalyzer.Then under violent agitating,the triethylamine was used as modifying agent to be doped into the TiO₂ solution.The dosage and temperature were changed to look for the optimum.Triethylamine with butyl titanate was used as a precursor to prepare Triethylamine modified TiO₂-sol.The TiO₂ films were prepared by the dip-coating for thrice used the solutions prepared as above.After that,the crystal structure and the photocatalytic efficiency of the samples completed were tested through XRD,SEM,TEM,Volume analyzer,UV-Vis,FT-IR.The research results were shown below:Firstly,the modified TiO₂ sol remained be anatase crystalline,the difference is that the TiO₂ modified as Triethylamine doped later has a better property than the one doped with butyl titanate.Secondly,when the pH of sol was change to neutral as Triethylamine doped the TiO₂-sol show out worst stability.Then it will re-stable as Triethylamine being kept on doping.But it won’t improve the visible light photocatalytic ability.The mass ratio of m （Triethylamine）:m（butyl titanate）reaches to 1:1 show out to be the best.As the temperature rises,the modified TiO₂ displays better visible-light absorptivity even though the volume of particle growth quite fast because of the high temperature,which weaken the photocatalytic ability.From above,the optimum temperature was 65℃and modified TiO₂ flims showd the best photodecomposition performance. The modified TiO₂ perform better visible-light absorptive than the pure TiO₂.At the same time,the modified TiO₂ has better photocatalytic activity than the pure one from the degradation of Rhodamine B under visible-light.The degradation speed constant is seven times more than the pure one.The modified TiO₂ remind has a steady catalytic activity in long-last experiment.

The removal of nitrogen in petrolenum fractions has become a paramount problem in the refining industry as result of continuous decline in quality of petroleum feedstocks and increasingly stringent environment regulations.In addition,nitrogen-containing compounds significantly reduce the activity of catalysts for hydrodenitrogenation（HDN）.Transition metal phosphides have recently been the focus of research due to its higher activity compared to metal sulfide for HDN.Molybdenum phosphide was chosen as the HDN catalysts in the present dissertation because it is reported to have the highest activity among transition metal phosphides.Moreover,the effect of TiO₂ addition to supported molybdenum phosphide catalysts on the HDN was investigated.The catalysts were characterized by TEM,XRD,TPR. The main contents are as follows:A series of SiO₂-supported molybdenum phosphide catalysts with initial Mo/P atomic ratio of 0.5-2 and loading level of 15-35wt%in the oxidic precursors were prepared by an in-situ reduction method.Quinoline is easily hydrogenated to DHQ on molybdenum phospides catalysts.The activity of hydrogenation reaction is higher than that of the C-N breaking and the C-N breaking is the rate-controlling Step for quinoline HDN on MoP/SiO₂.It is found that the supported MoP catatlysts prepared by in-situ reduction method is superior to that by the convention reduction-passivation-reduction method in HDN.A series of supported molybdenum phosphide catalysts containing TiO₂ were prepared by two methods and investigated in HDN of quinoline.The activity of molybdenum phosphide for quinoline HDN increased significantly by the addition of TiO₂.The activity of supported MoP containing TiO₂ is much higher than that of supported MoP.TiO₂ enrichment on the surface of the catalysts was observed,which may play an important role in the enhancement of HDN activity.The product distribution analysis suggested that the ability of both hydrogenation and C-N breaking is enhanced by the addition of TiO₂.The synergetic effect of TiO₂ and molybdenum phosphide was observed.The increase in the quinoline HDN activity may be attributed to higher electron density caused by the transfer of the electron in Ti³⁺species to molybdenum phosphide.

Nowadays, the environmental pollution has more and more negative impacts on the quality of our daily life. Researches on efficient materials for environmental protection have been focused in recent years. TiO₂ photocatalyst, which can be used in degradation of many organic molecules, has been studied for about ten years. The disadvantage of TiO₂ plotocatalyst is its visible-activity. The aim of this research is to increase the visible-activity of TiO₂.1. NiFe₂O₄ and TiO₂ powder was prepared using sol-gel and co-deposition method, respectively. The nanosized composite of NiFe₂O₄-TiO₂ was prepared by high temperature sintering of NiFe₂O₄ and TiO₂ nanopowder. The as-synthesized powder is in an average size of 40-50 nm. The XRD result shows that the ratio of anatase to rutile is about 7:3 at the annealing temperature of 600℃.2. For comparison, three organic molecules, methylene blue, methyl orange and phenol were selected to test the effectiveness of the as-prepared NiFe₂O₄-TiO₂ nanosized composite. Photocatalytic related factors such as the composite annealing temperature, ratio of NiFe₂O₄ to TiO₂ in the composite, amount of the composite added in the solution and the pH value of the solution were studied. Results show that response of the NiFe₂O₄-TiO₂ nanosized composite in visible light is improved greatly compared with the pure TiO₂ powder, and the degradation amount of the target organic molecule in NiFe₂O₄-TiO₂ added solution is about 2 times that of pure TiO₂ added solution.

In recent years, as an important photocatalysis material, TiO₂ has been widely used and studied in the field of environmental photocatalysis, which includes the degradation of organic pollutants such as aromatics, olefms, explosives, dyes, pesticides and so on. With the emergence of nanometer material, studies on the photocatalysis properties of nanometer TiO₂ has become more and more important, especially in the preparation and study of supported nanometer TiO₂.Platinum is an important catalyst in the oil refining and petrochemical. Based on H₂PtCl₆·6H₂O and NaBH₄, Pt nanomaterials synthesized by Ultrasound-assisted chemical reduction. The effect of ultrasonic on the growth process of Pt nanomaterials was investigated. It was characterized by Ultraviolet visible spectrum（Uv-vis）, transmission electron microscopy（TEM）, TEM electron diffraction. Pt nanomaterials was prepared, which is spherical, size in 30-60 nm, and it has dendritic structure. Compared with previous methods, it exhibits advantages in simple source of raw materials, more moderate conditions, less impurities, and it studied a new process line of synthesis Pt nanomaterials.Studies on the effects of CI^- on photocatalysis properties of TiO₂ catalysts are significantly important, for Cl^- will be presented in the process of preparation and degradation of organic chloride. There are two viewpoints: one is that the passivation for catalyst is caused by Cl₂, which can be adsorbed in catalyst active site by the strong capacity of accepted electrons; the other is that Cl·can promote the Photocatalytic degradation process of the organic chloride. The effect of the load halogen elements on the oxidation process of propylene by nanometer TiO₂ photocatalyst has been studied in this paper. Three results have been abtained: Cl^- supported can promote the oxidation process, and Br₂ loaded plays no role in the oxidation process, while I₂ loaded can interpret the passivation of the oxidation process.For a long time, many researchers focus on the preparation of powder-catalyst, whose performance is better if whose size is smaller. However, it will bring great inconvenience and a huge waste, for it is more difficult to operate and recycling in the practical application. Fortunately, those shortcomings can be overcome by the deposition of photocatalysis films on the vector. This skill has an important role in actual application, especially for those expensive catalysts, because it can solve the problem of, improve utilization of supported catalyst and reduce waste. In this paper, we have successfully prepared Pt / glass catalyst and Pt-TiO₂/glass in the commom glass. Additionally, the effects of the two catalysts on oxidation of CO has been studied: pure Pt has little catalytic activity for the oxidation of CO; while the catalytic activity of Pt-TiO₂ is stronger than the activity of pure Pt, and the catalytic activity of Pt/TiO₂ performs better.

Titanium dioxide is the most widely studied semiconductor photocatalystic materials. It can photocatalyze various kinds of organic pollutants to small non-toxic inorganic substances. However, titanium dioxide is only activated under ultraviolet light irradiation, so the solar spectrum can not be used efficiently. The photons yield is very low, and photogenerated carrieries can be easily recombinated. Doping with transition metal ions can enhance the photocatalytic activity of titanium dioxide effectively. The efficiency of ion-doping is related with the molecular structure of the degradation objects. The effects of Cr³⁺-doping TiO₂ on the photacatalytic degradation of five kinds of dyes have been investigated in this paper, and the effects of Cr³⁺-doping on the energy band structure, state density, charge density and electronic population of TiO₂ have been also studied by using DFT. The relationship of ion-doping and the molecular structure of dyes were discussed by using the theory of frontier molecular orbital.The TiO₂ nanoparticles doped with chrominum ion were prepared by sol-gel method. The results of X-ray diffraction indicate that the entrance of Cr³⁺ ion into the latttice of TiO₂ is benificial to the reduction of the diameter of the TiO₂ nanoparticles and the formation of more anatases in the process of phase change The positron annihilation tests show that larger space micro-holes are formed in the prensence of Cr³⁺ ion dopant in TiO₂. Red shift is observed for Cr³⁺-doping TiO₂. Degradation results of five dyes with different structure show that the efficiency of five dyes degraded by pure TiO₂ is different, the order is: rohodamine B < methyl orange < congo red < alizarin red < methylene blue. The order of photocatalytic degradation of five dyes is changed after TiO₂ is doped with Cr³⁺: rohodamine B < methyl orange < methylene blue < alizarin red < congo red. Above experiment insults show that the effects of Cr³⁺ ion doping were not only related to the concentration but also related to the structure of the model molecule.The electronic structure and properties of anatase substitued Ti⁴⁺ with Cr³⁺ and Cr³⁺ ion interstitial in the lattice cell were calculated by CASTEP module which is based on density function theory. The results show that the anatase band gap change from undirect to direct afer Cr³⁺ ion doping into TiO₂, and the fermi level shift up into the conduction band, which results in anatase change to degeneracy semiconductor. The impurity band hybrided by Cr 3d orbital and Ti 3d orbital enter into the conduction band, which is connected with the conduction band and form a new degeneracy band. The shallow level trap barrier in the semiconductor band theory is positive to the transfer of carriers, which can enhance the photocatalytic activity of anatase. The band gap decreases linearly with increasing chrominum concentration. The milliken population and electron density difference show that the covalent bond of Cr-O is sronger than that of the Ti-O bond in the supercell substitued Ti⁴⁺ with Cr³⁺, and the covalent bond of the Cr-O bond is weaker than that of the Cr-O bond when Cr³⁺ ion interstitial into the lattice cell, and its overlap population value of Ti-O bond is less than that of the case of substitution. That is because Cr atom entering into lattice interstitial strongly attracts O atoms, which reduces the electronic cloud overlapping between Ti and Cr atom. This two types of doping have different effects on the absorption properties of anatase. The absorption edge has a red shift nearly 400nm when Cr³⁺ substitutional to Ti⁴⁺ in the supercell, whereas a new absoprption peak appears at nearly 800nm when Cr³⁺ interstitial in anatase supercell.The energy level of frontier molecular orbital of five dyes were calculated by Dmol³ module which is based on density function theory. The decolor rates of pure TiO2 photocatalytic dyes are related to the energy level of lowest unoccupied molecular orbital of dyes:D = -2.7233E_LUMO²-28.847E_LUMO -12.175 R² =0.9731After doping of Cr³⁺ ion in TiO₂, the enhance rate of decolor rate in the presence of Cr³⁺-doped TiO₂ are related to the energy level of lowest unoccupied molecular orbital of dyes and the concentration of Cr³⁺ ion doping:

Phenol wastewater is one of key controlling objects,which does great harm to environment and becomes a serious problem in environmental protection. Photocatalytic as a new methlod to deal with wastewater in rescent years deeply studied by researcher for its high photo-degradation efficiency,simple technical equipment,operating controlling easily and none secondary pollution caused.TiO₂ is one of the promising photocatalysts because of its high photocatalytic activity,high chemical stability,low cost and non-toxicity.However the application of TiO₂ only limit to UV（wavelength＜387nm）.Therefore,preparation of the catalyst coated as membrane then has been a focus of attention.Hollow TiO₂ nanocrystalline with Ag were prepared by silica as a template which systhensised through sol-gel reaction.A series of Ti-SBA-1 mesoporous molecular sieves were directly synthesized under strongly acidic conditions using cetyltriethylammonium bromide as a template.Ag supported on catalysts Ti-SBA-1（Ag/Ti-SBA-1）was prepared by impregnation method.The samples were characterized by TEM,SEM、XRDand N₂/adsorption/desorption analysis.The result showed that catalyst Ag/H-TiO₂ is 250nm,the sharp of Ag/Ti-SBA-1 like flower and had highly surface areas.Ag hightly dispersed on catalysts.The photocatalytic degradation of phenol-containing water with the sample was investigated with a 6W ultraviolet lamp.The influence of various reaction parameters including reaction time,reactant initialize concentration and Ag content affecting the activity of Ag/Ti-SBA-1 were also studied.Then comparedpu pure TiO₂with Ag/TiO₂ and Ag/Ti-SBA-1 on degradation ratio.Under the optimized reaction conditions,that is initialize concentration is 6×10^-4molL^-1,Ag content is 6.7%,PH is 2,the result indicated the Ag can improve photodegredation activity efficienly.After 2h the photodegredation ration of catalyst TiO₂、Ag/H-TiO2、Ag/Ti-SBA-1 rearched.68%、100%、70%respectively.