交联累托石/Cu_2O纳米复合材料的制备及可见光催化性能  

Synthesis and Visible Light Photocatalytic Activity of Cross-Linked Sodium Rectorite/Cu_2O Nanocomposites

作　　者：陈金毅[1,2] 李念[1] 李晶[1] 朱亮[1] 彭昌军[1] 

机构地区：[1]武汉工程大学环境与城市建设学院,武汉430073 [2]武汉工程大学磷资源开发利用教育部工程研究中心,武汉430073

出　　处：《物理化学学报》2011年第4期932-938,共7页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(50804035);湖北省自然科学基金(2008CDB375);武汉市青年科技晨光计划(200950431194);武汉工程大学青年基金(Q0806)资助项目~~

摘　　要：以醋酸铜为原料,交联累托石(CN-REC)为载体和模板,制备了CN-REC/Cu2O纳米复合材料.利用X射线衍射(XRD)、透射电镜(TEM)、傅里叶变换红外(FTIR)光谱、紫外-可见漫反射光谱(UV-VisDRS)等技术对复合材料的形貌、表面结构、层间微结构、光响应性能进行了研究.结果表明:CN-REC对Cu2O的形貌具有较好的调控作用,Cu2O均匀分散负载于CN-REC的层间和片层表面;Cu2O和CN-REC通过Si―O―Cu键发生相互作用;复合材料的能带隙变宽、光响应能力增强.以卤素灯为可见光光源,活性艳红(X-3B)为目标污染物,研究了复合材料的可见光催化性能,结果表明,光催化反应过程符合L-H动力学模型,2h内浓度为160mg·L-1的X-3B去除效率可超过80%.CN-REC/Cu2O nanocomposites were synthesized with Cu（CH3COO）2·H2O as a copper source and cross-linked sodium rectorite （CN-REC） as a carrier and template. The obtained samples were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, Fourier transform infrared （FTIR） spectroscopy, and ultraviolet visible diffuse reflectance spectrum （UV-Vis DRS）. The results indicate that the regulatory effects of CN-REC on Cu2O are significant. Cu2O is dispersed in the interlayer and on the surface of the lamellar structure of CN-REC. A Si―O―Cu bond was formed between the cuprous oxide crystal and the CN-REC crystal, which established a bridge for the transfer of photogenerated charge. The energy band gap of the nanocomposites became wider and the photoresponse properties of the nanocomposites became stronger. To study the visible light photocatalytic activity of the nanocomposites, reactive brilliant red （X-3B） was selected as a target contaminant. The photocatalytic degradation rate of X-3B with the nanocomposites is more than 80%, which is better than that with Cu2O. The degradation progress accorded with the L-H kinetics equations.

关 键 词：交联累托石 CU2O 纳米复合材料 可见光催化活性 

分 类 号：O643.36[理学—物理化学]