以硫酸钛为原料,在210 ℃低温下,水热制备TiO2纳米带.通过沉淀法用CdS修饰TiO2纳米带表面,制得TiO2@CdS复合光催化剂,采用XRD、TEM和反射紫外对其结构及光化学特性进行初步表征.以可见光(λ≥450 nm)光催化降解罗丹明B(Rhodamine B,RhB)、水杨酸(Salicylic Acid,SA)及2,4-二氯苯酚(2,4-Dichlorophenol,2,4-DCP)为探针反应,研究反应温度、介质和负载CdS对TiO2@CdS结构性能的影响.结果表明,所制备的TiO2纳米带分散性好.复合粉末由锐钛矿相TiO2和立方相CdS组成.常温25 ℃中性介质中用CdS修饰的TiO2的活性,在可见光照射下,为单纯TiO2纳米带的29倍.同时,TiO2也促进了CdS可见光光催化活性的提高.通过跟踪降解体系紫外-可见光谱(UV-vis)、红外光谱(FTIR)和总有机碳(TOC)测定,结果发现TiO2@CdS/vis体系在pH 7.0时,对SA的降解率较TiO2纳米带有显著地提高,反应15 h和21 h后,RhB和2,4-DCP的矿化率分别可达到47.8%和30.8%.
参考文献
| [1] | Fang Y F;Huang Y P;Liu D F;Huang Y,Guo W,Daivd J .Photocatalytic degradation of the dye sulforhodamine-B:A comparative study of different light source[J].Environmental Sci,2007,19:97-102. |
| [2] | 马军委,张海波,董振波,吴雪文,韩团辉.纳米二氧化钛制备方法的研究进展[J].无机盐工业,2006(10):5-7. |
| [3] | Zhang XW;Zhou MH;Lei L .Preparation of photocatalytic TiO2 coatings of nanosized particles on activated carbon by AP-MOCVD[J].Carbon: An International Journal Sponsored by the American Carbon Society,2005(8):1700-1708. |
| [4] | Xingwang Zhang;Minghua Zhou;Lecheng Lei .Preparation of anatase TiO_2 supported on alumina by different metal organic chemical vapor deposition methods[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2005(1/2):285-293. |
| [5] | Yang L;Zhang L D;Meng G M .Preparation and photoluminescence of highly ordered TiO2 nanowires arrays[J].Applied Physics Letters,2001,78:1125. |
| [6] | Zhang X Y;Zhang L D;Chen W .Electrochemical fabrication of highly ordered semiconductor and metallic nanowire Arrays[J].Chemistry of Materials,2001,13:2511. |
| [7] | Zhang XW;Zhou MH;Lei LC .Preparation of an Ag-TiO2 photocatalyst coated on activated carbon by MOCVD[J].Materials Chemistry and Physics,2005(1):73-79. |
| [8] | Ling Wu;Jimmy C.Yu .Characterization and photocatalytic mechanism of nanosized CdS coupled TiO_2 nanocrystals under visible light irradiation[J].Journal of molecular catalysis, A. Chemical,2006(1/2):25-32. |
| [9] | 姚秉华,郑怀礼,杨丽芹,田萍,庞秀芬.CdS/TiO2/漂珠复合光催化剂制备及其降解高效氯氰菊酯研究[J].光谱学与光谱分析,2007(05):1010-1014. |
| [10] | So W W;Kim K J;Moon S J .Photo-production of hydrogen over the TiO2@CdS nano-composite particulate films treated with TiCl4[J].International Journal of hydrogen Energy,2004,29:229-234. |
| [11] | 陈晓慧,柳丽芬,杨凤林,张兴文,余济美.CdS/TiO2光催化去除水体中氨氮的研究[J].感光科学与光化学,2007(02):89-101. |
| [12] | Guoqing Guan;Tetsuya Kida;Katsuki Kusakabe;Kunio Kimura;Eiichi Abe .Photocatalytic activity of CdS nanoparticles incorporated in titanium silicate molecular sieves of ETS-4 and ETS-10[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2005(1):71-78. |
| [13] | HUANG Chao-biao,WU Chuan-liu,LI Shu-yan,LAI Jin-ping,ZHAO Yi-bing.Quantitative Model for the Surface-related Electron Transfer in CdS Quantum Dots[J].高等学校化学研究（英文版）,2009(01):17-24. |
| [14] | 董煜,赵远征,张怡娜.高效液相色谱法测定注射用赖氨匹林中的阿司匹林及游离水杨酸[J].色谱,2002(03):277-278. |
| [15] | 徐占霞,崔冠军,张敏,杨建军.新型CdS/TiO2纳米复合材料的制备及其可见光催化性能研究[J].影像科学与光化学,2008(06):489-498. |
| [16] | 费学宁,刘晓平,李莹,杜国银.半导体复合CdS/TiO2催化剂改性及冷冻-光催化组合方法应用的初步研究[J].影像科学与光化学,2008(05):417-424. |
| [17] | Kim TK;Lee MN;Lee SH;Park YC;Jung CK;Boo JH .Development of surface coating technology of TiO2 powder and improvement of photocatalytic activity by surface modification[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2005(1/2):171-177. |
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