ZnFe_(2)O_(4) /SnS_(2)异质结的构建及光催化性能研究  

Construction and properties of ZnFe_(2)O_(4) /SnS_(2) heterojunction

作　　者：李祥 王晶 李兴华 朱秀红 冯娟 彭勇[2] LI Xiang;WANG Jing;LI Xing-hua;ZHU Xiu-hong;FENG Juan;PENG Yong(Northwest University,Xi’an Shaanxi 710069;Electron Microscopy Centre of Lanzhou University,Lanzhou University,Lanzhou Gansu 730000,China)

机构地区：[1]西北大学物理学院,陕西西安710069 [2]兰州大学电镜中心,甘肃兰州730000

出　　处：《电子显微学报》2022年第3期226-233,共8页Journal of Chinese Electron Microscopy Society

基　　金：陕西省教育厅自然科学研究项目(No.0JK0946);陕西省自然科学基础研究计划项目(No.2021JQ-427)。

摘　　要：本文将单分散且尺寸可控的ZnFe_(2)O_(4) 磁性纳米颗粒均匀分散于二维SnS_(2)纳米片;构建ZnFe_(2)O_(4) /SnS_(2)二元异质结。TEM结果显示,该方法制备的ZnFe_(2)O_(4) 磁性纳米颗粒尺寸较小,分布均匀,且颗粒没有发生团聚现象,平均尺寸为14 nm,在异质结复合材料中,ZnFe_(2)O_(4) 纳米颗粒分散性良好,均匀地负载在SnS_(2)的表面;ZnFe_(2)O_(4) 纳米颗粒的饱和磁化强度MS=71.20 emu/g,矫顽力HC=1.94 Oe;异质结样品的饱和磁化强度MS=13.60 emu/g。同时发现,将ZnFe_(2)O_(4) 磁性纳米颗粒应用于光催化领域,可以提高异质结的光催化性能,相比纯SnS_(2)而言,ZnFe_(2)O_(4) /SnS_(2)异质结的光催化降解的速率提高了1.8倍,在3 h内可以有效的降解87.5%的RhB水溶液;而且该催化剂的磁性还可以增强光催化剂的重复利用率,这对催化和能源领域具有重要的研究价值。In this paper, monodisperse and size controllable ZnFe_(2)O_(4) magnetic nanoparticles were uniformly dispersed on two-dimensional SnSnanosheets.The ZnFe_(2)O_(4) /SnS_(2) binary heterojunction was constructed by polyhydroxyl method. TEM results show that the size of ZnFeOmagnetic nanoparticles is small and evenly distributed, and the particles do not agglomerate, and the average size of ZnFeOis 14 nm. In the heterostructure composites, ZnFe_(2)O_(4)nanoparticles had good dispersion and were uniformly loaded on the surface of SnS.The saturation magnetization of ZnFeOnanoparticles was M=71.20 emu/g and coercivity H=1.94 Oe. The saturation magnetizatio n of the heterojunction sample was M=13.60 emu/g. It is also found that the application of ZnFe_(2)O_(4)magnetic nanoparticles in the field of photocatalysis can improve the photocatalytic performance of heterostructures. Compared with pure SnS_(2), the photocatalytic degradation rate of ZnFe_(2)O_(4)/SnS_(2) heterostructures is 1.8 times higher, and 87.5% RhB aqueous solution can be effectively degraded within 3 h. Moreover, the magnetic properties of the catalyst can also enhance the photocatalyst reuse rate, which has important research value in the fields of catalysis and energy.

关 键 词：铁酸锌 二硫化锡 异质结 透射电子显微镜 磁性纳米颗粒 

分 类 号：TB34[一般工业技术—材料科学与工程] X52[环境科学与工程—环境工程] TB332