二氧化硅负载纳米Cu_2O的制备及其光催化反应  

Preparation of Cu_2O photocatalyst with silicon dioxide and its photocatalytic reaction

作　　者：王俊丽[1] 孟双明[1] 赵强[1] 李作鹏[1] 乔永生[1] 郭永[1] 

机构地区：[1]山西大同大学化学与环境工程学院,山西大同037009

出　　处：《实验技术与管理》2016年第2期45-47 50,共4页Experimental Technology and Management

基　　金：国家自然科学基金项目(21477069);山西省教育厅高科技项目(2013140);山西大同大学校级科研项目(2010Q112009K3)

摘　　要：采用直接沉淀法制备了Cu_2O/SiO_2的光催化剂。以所制备的纳米Cu_2O为光催化剂,使甲基橙溶液进行光催化降解,并且考察其负载量对光催化降解性能的影响。结果表明:纳米Cu_2O颗粒与SiO_2结合良好,Cu_2O的质量分数为5%的Cu_2O/SiO_2复合物活性最高,经过60 min的降解,甲基橙的降解率达到95.7%,与纯相纳米Cu_2O比较,SiO_2的加入还提高了Cu_2O的稳定性,经过5次循环降解后,Cu_2O/SiO_2复合物仍然具有较高的活性。The photocatalyst Cu_2O/SiO_2 was prepared by the direct precipitation method.Decolorizing of methyl orange(MO)solution as the model reaction,the photocatalytic activity was evaluated.The results show that the Cu_2O particles and SiO_2 were well combined.The Cu_2O/SiO_2 composite with Cu_2O content of 5 %(w)can exhibit the optimal photocatalytic activity under the visible light.Under optimal conditions,the decolorization efficiencies of MO for 60 min can reach 95.7%.For the Cu_2O/SiO_2 composites,it is found that the incorporation of SiO_2 has improved the structural stability of Cu_2O compared with Cu_2O.Recycling of the catalyst reveals that the Cu_2O/EG composites still have high photocatalytic efficiency even when repeatedly using for five times.

关 键 词：光催化剂 氧化亚铜 二氧化硅 甲基橙溶液 光催化降解 

分 类 号：TB383.1[一般工业技术—材料科学与工程]