二维Z型BCN/Sn_(3)O_(4)复合材料的光催化还原性能  

Photocatalytic Reduction Performance of Z-scheme Two-dimensional BCN/Sn_(3)O_(4) Composite Materials

作　　者：王乙舒 李雪 闫丽 徐红赟 祝玉鑫 宋艳华 崔言娟 WANG Yishu;LI Xue;YAN Li;XU Hongyun;ZHU Yuxin;SONG Yanhua;CUI Yanjuan(School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China)

机构地区：[1]江苏科技大学环境与化学工程学院,镇江212100

出　　处：《高等学校化学学报》2021年第12期3722-3730,共9页Chemical Journal of Chinese Universities

基　　金：江苏省自然科学基金(批准号:BK20190981);福州大学能源与环境光催化国家重点实验室开放课题(批准号:SKLPEEKF202103)资助.

摘　　要：分别以直接热聚合法和水热合成法制备得到二维硼掺杂氮化碳(BCN)和四氧化三锡(Sn_(3)O_(4))半导体材料,采用超声复合和煅烧复合两种方法构建了BCN/Sn_(3)O_(4)复合材料.利用X射线衍射(XRD)、紫外-可见漫反射(UV-Vis)光谱、透射电子显微镜(TEM)等手段对所制备样品进行了表征和分析,探讨了不同复合方法对催化剂微观结构及光电性质的影响;以可见光下光解水制氢和活化氧制过氧化氢为模型反应考察了催化剂的光催化性能.结果表明,BCN与Sn_(3)O_(4)能够形成二维面-面复合结构,相比于超声复合法,直接煅烧法更有利于有效界面的形成,使得界面间产生Sn_(3)O_(4)到BCN的电荷迁移,增强了BCN表面电荷密度,并使复合材料具有更加优化的光电响应和光催化还原活性,其中煅烧法得到的复合样品BCN/Sn_(3)O_(4)-3C(Sn_(3)O_(4)与BCN质量比为3%)表现出显著增强的光解水制氢及活化氧制过氧化氢的活性.The research on the Z-Scheme heterostructure composition of carbon nitride-based polymer mate-rial is an important strategy to improve its photocatalytic performance.Two-dimensional boron-doped carbon ni⁃tride(BCN)and Tin tetroxide(Sn_(3)O_(4))semiconductor materials were prepared by direct thermal polymerization and hydrothermal synthesis,respectively.And BCN/Sn_(3)O_(4) composites were constructed by ultrasonic composite and calcined composite methods.The prepared samples were characterized and analyzed by means of X-ray diffraction(XRD),ultraviolet-visible diffuse reflectance(UV-Vis),transmission electron microscopy(TEM).The microstructure and photoelectric properties of the catalyst prepared from different methods were discussed.At the same time,the photocatalytic performance of the catalysts was investigated by using visible light photolysis of water to produce hydrogen and activated oxygen to produce hydrogen peroxide.The results showed that BCN and Sn_(3)O_(4) can form a two-dimensional surface-to-surface composite structure,and compared to the ultrasonic composite method,the direct calcination method is more conducive for the formation of an effective interface,causing the charge transfer from Sn_(3)O_(4) to BCN between the interface and enhancing the surface charge density of BCN.This composite material had much optimized photoelectric response and photo⁃catalytic reduction activity.Among them,the sample BCN/Sn_(3)O_(4)-3C(mass ratio of Sn_(3)O_(4)/BCN=3%)prepared by calcination method showed significantly enhanced photolysis of water to produce hydrogen and activated oxygen to produce hydrogen peroxide.This work provides a new research idea for the construction of carbon nitride-based Z-scheme photocatalytic systems.

关 键 词：硼掺杂氮化碳 二维复合 Z型异质结 制氢 活化氧 

分 类 号：O643[理学—物理化学]