以商业锐钛矿TiO2和钼酸铵水溶液作为前驱体,利用浸渍-焙烧的方法制备了MoO3与TiO2不同质量比率的MoO3/TiO2复合光催化剂.采用X射线衍射、高分辨透射电镜和紫外-可见漫反射对其进行了表征.以甲基橙为光催化反应的模型化合物,评价了其紫外光催化活性和MoO3/TiO2复合光催化剂的紫外产氢活性.通过添加各种自由基清除剂研究了甲基橙在光催化反应过程中的活性物种.结果表明:与纯的MoO3和TiO2相比,20％ MoOJTiO2光催化剂在400 ～ 700 nm区域具有更强的光吸收性能并且吸收带边向长波方向移动.在所有MoO3/TiO2样品中,20％ MoO3/TiO2光催化剂具有最高的紫外光活性.·OH,h+,·O2-和H2O2,特别是h+,共同支配了甲基橙的光催化降解过程.
参考文献
| [1] | Kong, M.;Li, Y.;Chen, X.;Tian, T.;Fang, P.;Zheng, F.;Zhao, X. .Tuning the relative concentration ratio of bulk defects to surface defects in TiO~2 nanocrystals leads to high photocatalytic efficiency[J].Journal of the American Chemical Society,2011(41):16414-16417. |
| [2] | JINGYU WANG;ZHIHONG LIU;RUXIU CAI .A New Role for Fe~(3+) in TiO2 Hydrosol: Accelerated Photodegradation of Dyes under Visible light[J].Environmental Science & Technology: ES&T,2008(15):5759-5764. |
| [3] | 田琳琳,姚兰芳,许瑞清,康俊龙,李林,王硕.铋铁共掺纳米TiO2复合薄膜的制备及光催化性能[J].人工晶体学报,2011(03):710-715. |
| [4] | 包镇红,江伟辉,苗立锋.硅铝共掺杂对TiO2薄膜结构及性能的影响[J].人工晶体学报,2012(04):995-999,1005. |
| [5] | Jin ZL;Zhang XJ;Lu GX;Li SB .Improved quantum yield for photocatalytic hydrogen generation under visible light irradiation over eosin sensitized TiO2 - Investigation of different noble metal loading[J].Journal of molecular catalysis, A. Chemical,2006(1/2):275-280. |
| [6] | Abe R;Takami H;Murakami N;Ohtani B .Pristine simple oxides as visible light driven photocatalysts: Highly efficient decomposition of organic compounds over platinum-loaded tungsten oxide[J].Journal of the American Chemical Society,2008(25):7780-7781. |
| [7] | Jum Suk Jang;Hyun Gyu Kim;Upendra A;Joshi;Ji Wook Jang;Jae Sung Lee .Fabrication Of Cds Nanowires Decorated With Tio_2 Nanoparticles For Photocatalytic Hydrogen Production Under Visible Light Irradiation[J].International journal of hydrogen energy,2008(21):5975-5980. |
| [8] | David R. Baker;Prashant V. Kamat .Photosensitization Of Tio_2 Nanostructures With Cds Quantum Dots: Particulate Versus Tubular Support Architectures[J].Advanced functional materials,2009(5):805-811. |
| [9] | Bian ZF;Zhu J;Wang SH;Cao Y;Qian XF;Li HX .Self-assembly of active Bi2O3/TiO2 visible photocatalyst with ordered mesoporous structure and highly crystallized anatase[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2008(16):6258-6262. |
| [10] | Dingning Ke;Huajun Liu;Tianyou Peng;Xun Liu;Ke Dai .Preparation and photocatalytic activity of WO_3/TiO_2 nanocomposite particles[J].Materials Letters,2008(3):447-450. |
| [11] | Kostedt WL;Ismail AA;Mazyck DW .Impact of heat treatment and composition of ZnO-TiO2 nanoparticles for photocatalytic oxidation of an azo dye[J].Industrial & Engineering Chemistry Research,2008(5):1483-1487. |
| [12] | Madhukar NAVGIRE,Ajeet YELWANDE,Deepak TAYDE,Balasaheb ARBAD,Machhindra LANDE.MoO3-TiO2纳米晶体复合材料光降解糖蜜[J].催化学报,2012(02):261-266. |
| [13] | Licheng Li;Yanfang Wang;Kangzhong Shi .Preparation and Characterization of Mesoporous MoO3/TiO2 Composite with High Surface Area by Self-Supporting and Ammonia Method[J].Catalysis Letters,2012(4):480-485. |
| [14] | Dong F;Zhao WR;Wu ZB .Characterization and photocatalytic activities of C, N and S co-doped TiO2 with 1D nanostructure prepared by the nano-confinement effect[J].Nanotechnology,2008(36):365607-1-365607-10-0. |
| [15] | Guoting Li;K.H. Wong;Xiwang Zhang;Chun Hu;Jimmy C. Yu;R.C.Y. Chan;P.K. Wong .Degradation of Acid Orange 7 using magnetic AgBr under visible light: The roles of oxidizing species[J].Chemosphere: Environmental toxicology and risk assessment,2009(9):1185-1191. |
| [16] | jing Cao;Benyan Xu;Haili Lin.Chemical etching preparation of BiOI/BiOBr heterostructures with enhanced photocatalytic properties for organic dye removal[J].Chemical engineering journal,2012:91-99. |
| [17] | LI-SHA ZHANG;KIN-HANG WONG;HO-YIN YIP .Effective Photocatalytic Disinfection of E. coli K-12 Using AgBr-Ag-Bi2WO6 Nanojunction System Irradiated by Visible Light: The Role of Diffusing Hydroxyl Radicals[J].Environmental Science & Technology: ES&T,2010(4):1392-1398. |
| [18] | Nan Zhang;Siqi Liu;Xianzhi Fu .Synthesis of M@TiO2 (M = Au, Pd, Pt) Core-Shell Nanocomposites with Tunable Photoreactivity[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2011(18):9136-9145. |
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