Fe~(3+)掺杂TiO_2玻璃薄膜太阳光催化降解H酸的研究

采用溶胶-凝胶法在玻璃表面上制备了掺杂Fe3+的TiO2薄膜,用XRD、IR对其进行表征.在太阳光的照射下,以H酸为目标物,用自制敞开连续流平板式光催化反应器,进行了光催化法降解试验.结果表明:适量Fe3+的掺杂可明显提高TiO2玻璃薄膜在太阳光下的催化性能,掺Fe3+的摩尔质量百分数为(Fe3+/TiO2)0.06%时的光催化活性最高.太阳光照射3 h,H酸脱色率达到72.5%,反应速率遵从Langmuir-Hinshelwood方程,表观速率常数K′=0.007 4 min-1.     

Self-cleaning glass coated with Fe^3＋ -TiO2 thin film

The self-cleaning glass coated with Fe^3 -TiO2 photocatalytic thin film was prepared by sol-gel process from the system Ti(OC4H9),-NH(C2H4OH)2-C2H5OH-H2O containing FeCl3. The microstructure and properties of the film were studied using differential thermal analysis-thermogravimetry(DTA-TG), X-ray diffration (XRD) and scanning electron microscope(SEM). The transmittance of the self-cleaning glass was measured by using UV-Vis spectrometer. The effects of content of Fe^3 and the thickness of Fe^3 -TiO2 thin film on the photocatalytic ac-tivity were examined. The results show that the photocatalytic thin films are mainly composed of Fe3O4 and TiO2 particles within 10-100 nm. The appropriate amount of Fe^3 is effective for improving the photocatalytic activities of TiO2. The best photocatalytic activity is obtained when the molar ratio of Fe^3 to TiO2 is 0. 005 and the glass is coated with 9 layers.     

铁掺杂纳米TiO2膜的制备与光催化灭菌作用

利用溶胶-凝胶法制备Fe^3＋/TiO2和纯TiO2玻璃膜，用XRD、HRTEM、TG-DSC、SEM等手段表征，并研究膜的特性和结构。试验表明Fe^3＋/TiO2与TiO2均有较强的杀菌能力，但Fe掺杂TiO2的杀菌能力比纯TiO2高8.4%。纳米TiO2薄膜的微观结构分析为揭示TiO2光催化灭菌机理提供了证据。     

在线常压化学气相沉积方法制备TiO_2自洁薄膜玻璃(英文)

利用常压化学气相沉积技术,在浮法玻璃线上制备了TiO2自洁薄膜玻璃。研究了水和氧气对薄膜沉积速率的影响,结果表明水和氧气的加入增加了薄膜的沉积速率。分别用原子力显微镜和X-射线衍射分析仪研究了薄膜的表面形貌和晶型结构,薄膜表面的平均粗糙度为84 nm,其晶型由锐钛矿和金红石组成。同时还研究了自洁玻璃的光催化活性和亲水性,随着紫外光照时间的增加,薄膜的光催化活性增加且对水的接触角由光照前的54°降到光照后的6°。     

H3PW12O40-TiO2/膨润土光催化降解甲基橙的催化性能

通过溶胶凝胶制得H3PW12O40-Ti（OH）4凝胶,并柱撑于膨润土层间制备了复合光催化剂H3PW12O40-TiO2/膨润土。由XRD、SEM、EDS对制备的复合光催化剂进行表征测试表明,固载的H3PW12O40-TiO2使膨润土层状结构发生明显变化,柱撑体H3PW12O40-TiO2呈弥散状态,且TiO2为锐钛结构,催化剂为颗粒粒径大小不一、分布松散的复合材料。对甲基橙的H3PW12O40-TiO2/膨润土光催化降解应用表明,掺杂的杂多酸使所制备的复合催化剂光催化活性得到了极大提高,在光催化体系下有较广的pH适应范围,且制备的催化剂具有良好的催化稳定性。在表征分析及应用实验的基础上,提出了H3PW12O40-TiO2/膨润土的强化催化作用原理。     

Mechanism and behaviors of Cr3+-doped TiO2

TiO2 powder and TiO2 thin film on the surface of glazed ceramic tile were prepared by sol-gel method.The influences of different doping Cr3 concentration on the photocatalytic activity of TiO2 were discussed, UV-visible and X-ray diffraction analysis were used to test the performance of TiO2 powder and film. The results indicate that photocatalytic activity of doping Cr3 -TiO2 thin film is higher than that of powder, and the interaction between Cr3 -doped and substrate can greatly enhance the photocatalytic activity. The results of X-ray diffraction and photoabsorption show that the Cr3 -doped energy level in TiO2 is 0. 62 eV high from the top of valence band, which belongs to the type of deep energy level doping. On the basis of the semiconductor energy level theory and Cr3 dopant energy level, the semiconductor energy level model of Cr3 in TiO2 powder and thin film were established, and the doping mechanisms of Cr3 -doped in TiO2 powder and thin film were analyzed.     

液位沉降法制备 Ti O2薄膜及其性能研究

以钛酸丁酯为前驱液,无水乙醇为溶剂,乙酰丙酮为稳定剂,制备了 TiO2溶胶,采用液位沉降法在清洁的玻璃衬底上镀制TiO2薄膜。研究了添加剂聚乙二醇（1000）、p H、衬底温度对 TiO2溶胶在玻璃基板上附着性的影响;研究了液位沉降速度、容器倾角以及溶胶附着性对TiO2薄膜厚度的影响。考察了TiO2薄膜的表面形貌、晶相、光催化性能。结果表明,采用PEG与 Ti4＋的质量比为1,不调节pH的TiO2溶胶,在沉降速度为7 cm/min ,容器倾角为30°所制得的TiO2薄膜的光催化性能最好,光照3 h时其光催化降解率高达52.1％。     

H3PW12O40-TiO2/SiO2的制备及光催化性能

以硅胶为载体,采用浸渍法制备了H3PW12O40-TiO2/SiO2催化剂.利用IR、TG-DTA、XRD、XPS对其结构进行表征.研究结果表明,催化剂中的活性组分二氧化钛为锐钛矿型,磷钨酸仍保持其Keggin结构的基本骨架,二氧化钛及磷钨酸二者均与载体之间存在着化学作用.通过对染料罗丹明B的超声光催化降解研究发现,含4gH3PW12O40的TiO2溶胶浸渍在11gSiO2上的催化效果最佳,且H3PW12O40可明显提高TiO2超声光催化降解罗丹明B的降解率.     

Light energy conversion device for photocatalyst 2.0%WO_3-TiO_2 with oxygen vacancies for water splitting

Using carbon felt,polytetrafluoroethylene latex and powder catalyst to assembly a light energy conversion device,the photocatalytic activity of catalyst 2.0%WO3-TiO2(2%WO3 compounding TiO2) with oxygen vacancies was studied through the water splitting for O2 evolution,using a high pressure mercury lamp as the light source and Fe 3+ as the electron acceptor in two different devices:an ordinary photolysis device with catalyst powder suspending through a magnetic stirrer and a self-assembly light energy conversion device.The results show that after 12 h irradiation,the photocatalytic activity of 2.0%WO3-TiO2 with oxygen vacancies in the self-assembly light energy conversion device is higher than that of the ordinary photolysis device,and the amount of oxygen evolution is about 12 and 9 mmol/L respectively in these two devices.After 12 h,the rates of O2 evolution are slow in each device and the photocatalyst almost loses the photoactivity in the ordinary photolysis device.So,compared with the ordinary photocatalytic device,the rate of oxygen evolution and the life time of the catalyst are improved in the self-assembly light energy conversion device.     

Preparation of Ag-doped TiO_2 Thin Film by Sol-gel Method

The Ag-TiO2 thin film has been prepared on glass substrate by sol-gel process . The structure and properties of the materials were studied by DTA , XRD, and EPR. The photocatalytic activity was examined by the photocatalytic degradation of dichlorophos. The analysis results indicate that the photocatalytic activity of the Ag-TiO2 thin film is higher than that of pure TiO2 thin film. It is also influenced by the content of anatase and heating temperature . The ESR result shows that the Ag-TiO2 thin film has more hydroxide radicals than pure TiO2 thin film after illuminated by UV light.     

Preparation of TiO_2 Thin Film and Its Antibacterial Activity

1　IntroductionInrecentyears ,theuseofinorganicantimicrobialagentshasattractedinterestforthecontrolofmicrobes[1-3 ] .Thekeyadvantagesofinorganicantimicro bialagentsareimprovedsafetyandstability ,ascomparedwithorganicantimicrobialagents .Atpresent,mostanti…     

Grain Size and Photocatalytic Activity of Nanometer TiO_2 Thin FilmsPrepared by the Sol-gel Method

Transparent anatase TiO2 nanometer thin films with photocatalytic activity were prepared via the sol-gel method on soda-lime glass. The thickness , crystalline phase, grain size, surface hydroxyl amount and so on were characterized by scanning electron microscopy (SEM) , X-ray diffraction (XRD), transmission electron microscopy ( TEM), X-ray photoelectron spectroscopy (XPS) and UV-visible spectrophotometer ( UV-VIS). The photocatalytic activity of TiO2 thin films was evaluated for the photocatalytic decolorization of aqueous methyl orange . The effects of film thickness on the crystalline phase, grain size, transmittance and photocatalytic activity of nanometer Ti02 thin films were discussed.     

水热法制备TiO2薄膜光催化降解性能的研究

以Ti(SO4)2水溶液为前驱物，尿素为沉淀剂，采用水热法制备了锐钛矿型TiO2薄膜研究了该薄膜光降解苯甲酸的性能以及TiO2薄膜光催化降解有机物的机理。     

掺铁纳米TiO2的制备及其光催化抗菌性能的研究

采用溶胶-凝胶浸渍提拉法制备出玻璃负载纳米TiO2和掺杂不同量Fe3 的样品。用其处理亚甲基蓝溶液,发现掺杂适量的Fe3 可以有效地提高TiO2的光催化活性,过量掺杂反而降低光催化活性,最佳掺杂量为1%。通过对煅烧温度、煅烧时间和镀膜层数等因数的研究,总结出较优化的制备条件。所制备的掺铁纳米TiO2对大肠杆菌,金黄色葡萄球菌和枯草芽孢杆菌有较强的杀灭作用。用XRD对玻璃负载纳米TiO2薄膜进行了表征。     

多元掺杂负载型TiO_2光催化剂的制备与性能

为了提高TiO2光催化剂日光催化性能及解决催化剂回收问题,采用微乳液法制备了La3＋、Fe3＋、Co2＋、Ce4＋共掺杂TiO2/粉煤灰微珠光催化剂,用紫外-可见分光光度计测定了光催化剂的可见光吸收性能,用能谱仪（EDS）分析了催化剂的元素含量,以甲基橙为模型污染物考察了催化剂的光催化性能。实验结果表明：掺杂复合粒子在可见光区吸光性能均高于TiO2/漂珠;且多元素掺杂有协同作用,催化剂的吸收边带红移更多,对可见光的吸收也更强。日光照射下（Co2＋,Fe3＋,Ce4＋）三元共掺杂催化剂的活性≈（La3＋,Ce4＋）二元共掺杂催化剂的活性〉Fe3＋、La3＋单掺杂催化剂的活性。     

涂覆纳米TiO2薄膜的自洁玻璃研究

采用溶胶—凝胶法,并用浸渍提拉技术制备了涂覆纳米TiO2薄膜的自洁玻璃。通过热分析讨论了凝胶的转变过程。对比了自洁玻璃的亲水性,研究了该样品的光催化性能。研究表明,干凝胶的最佳热处理制度为升温速度为12℃／h．450℃时保温1h;镀膜6次的试样具有最好的光催化能力;样品在日光照射下也具有良好的亲水性和一定的自洁性能,但是,在可见光（不含紫外线）的照射下．没有体现出明显的亲水性和自洁性能。     

STUDY ON PHOTOCATALYTIC MECHANISM OF SOL-GEL-DERIVED Pb-DOPED TiO_2 THIN FILMS

Pb-doped TiO2 photocatalytic thin films were prepared on a soda-lime glass substrate via sol-gel method using TiO2 sol solution containing lead and characterized by X-ray photoelectron spectroscopy (XPS). The results showed that besides oxides of Ti(IV) there is a certain amount of oxides of To(Ⅲ) and Ti(Ⅱ) and Pb exists in the forms of PbTiO3 and PbO. The photocatalytic activity of the Pb-doped TiO2 films was evaluated by the photocatalytic decolorization of aqueous methyl orange and photocatalytic mechanism mas also analyzed.     

Preparation and Characterization of CeO2-TiO2/SnO2：Sb Films Deposited on Glass Substrates by R.F. Sputtering

CeO2-TiO2 films and CeO2-TiO2/SnO2:Sb(6 mol%)double films were deposited on glass substrates by radio-frequency magnetron sputtering(R.F.Sputtering),using SnO2:Sb(6 mol%)target,and CeO2-TiO2 targets with different molar ratio of CeO2 to TiO2 (CeO2:TiO2=0:1.0;0.1:0.9;0.2:0.8;0.3:0.7;0.4:0.6;0.5:0.5;0.6:0.4; 0.7:0.3; 0.8:0.2;0.9:0.1;1.0:0).The films are characterized by UV-visible transmission and infrared reflection spectra,scanning electron microscopy(SEM),Raman spectroscopy,X-ray photoelectron spectroscopy(XPS)and X-ray diffraction(XRD),respectively.The obtained results show that the amorphous phases composed of CeO2-TiO2 play an important role in absorbing UV, there are Ce3+,Ce4+ and Ti4+ on the surface of the films;the glass substrates coated with CeO2-TiO2(Ce/Ti=0.5:0.5;0.6:0.4)/SnO2:Sb(6 mol%) double films show high absorbing UV(>99),high visible light transmission(75%)and good infrared reflection films can be used as window glass of buildings,automobile and so on.     

NiAl_2O_4掺杂TiO_2薄膜电极的制备及其性能研究

采用醇-水共沉淀法制备NiAl2O4纳米粉体,将制备好的NiAl2O4纳米粉体以不同百分比掺杂到TiO2(P25)粉体中制成浆料。在浆料中加入OP乳化剂、乙酸分散剂,用丝网印刷法在涂有致密TiO2薄膜的FTO导电玻璃上制备掺杂NiAl2O4的TiO2薄膜电极。采用XRD、TEM、UV-VISI、-V伏安性能等手段对NiAl2O4粉体的晶相结构、形貌及NiAl2O4掺杂的TiO2薄膜电极的吸光性能、光电性能进行了表征。结果表明,将纳米NiAl2O4粉体掺杂到TiO2浆料中可以提高TiO2薄膜的吸光性能。当掺杂量为2%时,NiAl2O4/TiO2薄膜电极具有较好的光电性能,与未掺杂的TiO2薄膜电极相比,光电转化效率提高了17.4%,达到5.93%。     

液相沉积法制备掺银TiO2薄膜及光催化性能

为了提高TiO2薄膜光催化剂的活性,通过在氟钛酸铵、硼酸混合溶液中加入硝酸银,应用液相沉积法(LPD)制备了掺银TiO2薄膜.采用XRD、SEM、XPS、UV-vis等手段对其组成、表面形貌和结构进行了测试表征;并以甲基橙为模型物,进行降解实验评价Ag-TiO2薄膜的光催化性能.实验结果表明:硼酸/氟钛酸铵摩尔比为2～4,热处理温度为400℃,硝酸银掺杂量为0.03 mol/L时,Ag-TiO2薄膜具有良好的锐钛矿相晶型,同时具有较高的光催化性能.