空心玻璃微珠/ZnIn_2S_4纳米复合微球的制备及性能  

Preparation and characterization of visible light catalyst ZnIn_2S_4 coated on hollow glass microbeads

作　　者：苟丹 王雷磊 王磊[1,2,3] Dan Gou;Leilei Wang;Lei Wang(School of Environmental and Municipal Engineering,Xi＇an University of Architecture and Technology,Xi＇an 710055,China;Research Institute of Membrane Separation Technology of Shaanxi Province,Xi＇an 710055,China;Key Laboratory of Membrane Separation of Shaanxi Province,Xi＇an 710055,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]陕西省膜分离技术研究院,西安710055 [3]陕西省膜分离重点实验室,西安710055

出　　处：《科学通报》2018年第25期2612-2619,共8页Chinese Science Bulletin

基　　金：国家自然科学基金(41474032)资助

摘　　要：以空心玻璃微珠为载体,通过水热法实现了六方相型ZnIn_2S_4在空心玻璃微珠表面的可控自组装,从而制备出空心玻璃微珠/ZnIn_2S_4核壳复合微球.采用X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱(UV-Vis)、光电子能谱分析(XPS)技术对复合微球的表征,研究了微珠表面活化处理对表面包覆ZnIn_2S_4晶体结构、形貌、光学性质及催化性能的影响.结果表明,空心玻璃微珠分别通过硅烷偶联剂γ-氨丙基三乙氧基硅烷(KH550)和双氧水活化预处理后,其表面负载ZnIn_2S_4更为均匀,呈层状纳米花瓣结构,并对有机污染物罗丹明B(RhB)有着良好的降解效果.Heterogeneous photocatalytic technology based on semiconductors has been considered to be a green technology for environmental remeidation because it can use the solar energy. As a semiconductor visible light catalyst, ZnIn2S4 has attracted a lot of attention because of its narrow bandgap, strong absorption of visible light and unique catalytic properties. However, the disadvantages that the powders ZnIn2S4 are easy to aggregate and hard to separate make its photocatalytic efficiency limited. Besides, micro/nano powders are difficult to recycle, which tends to cause secondary pollution and increase the cost of photocatalysis inevitablely. In order to solve the disadvantages of the powder photocatalysts, floating substrates hollow glass microspheres（HGMs） are used as supporters for the coating of powder photocatalysts. Hollow glass microspheres, which are commonly used as floating-type carrier for photocatalysts due to their favorable properties of high chemical stability, low cost, lightweight mass, low thermal conductivity, hollow spherical morphology, good dispersibility and fluidity, are considered one of the most suitable supporters, and their combination are expected to show higher light utilization and collection efficiencies. In this research, the visible light photocatalyst ZnIn2S4 was coated on HGMs through a hydrothermal method at 160°C, which obtained HGM/ZnIn2S4 composite microspheres. The crystal structure, morphology and optical properties of the obtained composite microspheres were characterized by measurements such as X-ray diffraction（XRD）, scanning electron microscopy（SEM）, X-ray photoelectron spectrum（XPS） and UV-Vis diffuse reflectance spectra（UV-Vis）. The optimized conditions of ZnIn2S4 film coated on hollow glass microspheres were investigated by different pretreatment methods.such as alkali pretreatment, H2O2 activation and silane coupling modification. The results revealed that the activation of the HGMs through H2O2 and silane coupler angent KH550 showed better morpho

关 键 词：可见光催化 ZnIn2S4 空心玻璃微珠 核壳结构 可控自组装 

分 类 号：TB33[一般工业技术—材料科学与工程] TQ426[化学工程]