NiO-Ag_2S复合纳米结构的合成及光催化性能  

Synthesis and Photocatalytic Properties of NiO-Ag2S Nanocomposite

作　　者：丁瑞强[1] 闫阳阳 郭彦焦 李美成[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]华北电力大学可再生能源学院,北京102206

出　　处：《精细化工》2015年第5期496-499,共4页Fine Chemicals

基　　金：国家自然科学基金（91333122,51402106,51372082）; 教育部博士点基金（20110036110006）; 中央高校基础业务（2014XS52）

摘　　要：利用水热合成方法制备了一种由Ag2S纳米颗粒均匀填充在片层状Ni O空隙内的Ni O-Ag2S复合纳米结构,该复合结构中Ni O与Ag2S均匀地融合在一起。通过SEM、二维EDX及XRD对该复合纳米结构的形貌、均一性、晶体特性进行了分析。以500 W氙灯为光源,考察了Ni O-Ag2S复合纳米结构光催化降解甲基橙能力。结果表明,Ni O-Ag2S复合纳米结构具有良好的光催化活性,不仅比单独的Ni O和Ag2S降解能力强,而且在光照180 min后的降解效率比Ni O和Ag2S的物理混合物（质量比为1∶1）高30%。分析认为Ni O-Ag2S复合纳米结构中形成的p-n结是其高效催化性能的重要因素。NiO-Ag2S nanocomposite is synthesized by hydrothermal methodbased onspecialphotocatalysis. Integrating the photocatalytic properties of both lamellarstructure NiO and Ag2S nannopartieles, the space of NiO isuniformly filled with Ag2S nanoparticles. Through the SEM, two-dimension EDX, and XRD analysis, the morphology and uniformity erystallinity of NiO-Ag2 S nanocomposites are revealed. As a simulation reaction, the photocatalytic degradation of methyl orange in NiO-Ag2S nanocomposite suspension irradiated by 500 W Xe lamp isinvestigated. As a result, the photocatalytic ability of NiO- Ag2S nanoeomposite is higher than that of NiO and Ag2S. And its photocatalytic efficiency is 30% higher than that of the physical mixture of NiO and Ag2 S （ mass ratio ： 1 ： 1 ） after being irradiated for 180 min. It is believed that p-n junction of NiO-AgzS nanocomposite is the important factor for the high catalytic performance.

关 键 词：复合纳米结构 水热法 形貌 光催化性能 

分 类 号：O61[理学—无机化学]