采用共沉淀法制备了纳米结构的CuAl2O4/CuO,用草酸作牺牲剂,在150W的氙灯照射下,考查了不同焙烧温度、催化剂用量对光催化活性的影响。并用XRD、SEM、TG-DTA对样品分别进行了分析与表征,表明CuAl2O4为尖晶石型结构,平均粒径10nm左右。在相同条件下分别考察了固相法、共沉淀法与柠檬酸溶胶-凝胶法对催化剂活性的影响,实验结果表明溶胶-凝胶法产氢活性最好,产氢速率为41mL/h;共沉淀法次之,为34mL/h;固相法最差,为25mL/h。
Nanometer structured CuAl2O4/CuO was synthetized using co-precipitation method.The effect of different calcination temperatures and amount of catalysts on the catalyst activities were studied using oxalic acid as sacrificial agent under 150W Xenon lamp irradiation.The morphology and structure were characterized using XRD,SEM and TG-DTA,showing that the CuAl2O4 is spinel type structure and its particle size is about 10 nm.The catalyst was also synthesized by solid phase,co-precipitation,and citric acid sol-gel methods,and studied under the same photocatalytic experimental conditions;the experimental results show that the catalyst synthesized by sol-gel method shows the best hydrogen production rate of 41mL/h,followed by that synthesized by co-precipitation method（34mL/h）,and that synthesized by the solid phase method（25mL/h）.
参考文献
| [1] | Anpo M.;Takeuchi M. .The design and development of highly reactive titanium oxide photocatalysts operating under visible light irradiation [Review][J].Journal of Catalysis,2003(1/2):505-516. |
| [2] | 靳治良,吕功煊.光催化分解水制氢研究进展[J].分子催化,2004(04):310-320. |
| [3] | Wang DF.;Zou ZG.;Ye JH. .A new spinel-type photocatalyst BaCr2O4 for H-2 evolution under UV and visible light irradiation[J].Chemical Physics Letters,2003(1/2):191-196. |
| [4] | 高善民,黄柏标,崔得良.Ⅲ-Ⅴ族半导体纳米粒子合成的进展[J].化学通报,1998(05):7-11. |
| [5] | 刘强,关鲁雄,阎建辉,许磊.掺钇锆酸锶-TiO2复合光催化剂的制备及性能研究[J].无机化学学报,2007(02):347-352. |
| [6] | 于洪涛,全燮.纳米异质结光催化材料在环境污染控制领域的研究进展[J].化学进展,2009(02):406-419. |
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