微球状Co_(3)O_(4)/BiOBr光催化材料制备以及在可见光下高效去除RhB染料的研究  

Preparation of microspherical Co_(3)O_(4)/BiOBr photocatalytic materials and efficient removal of RhB dye under visible light

作　　者：巫衡 赵丹[1] 陈勇号 孙天奇 朱雨婷 董延茂[2] WU Heng;ZHAO Dan;CHEN Yonghao;SUN Tianqi;ZHU Yuting;DONG Yanmao(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009;School of Chemistry and Life Sciences,Suzhou University of Science and Technology,Suzhou 215009)

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009 [2]苏州科技大学化学与生命科学学院,苏州215009

出　　处：《环境科学学报》2025年第1期152-165,共14页Acta Scientiae Circumstantiae

基　　金：苏州市区域水质改善与水生态安全技术及综合示范项目(No.2017ZX07205);苏州市工业化前瞻性项目(SYG201744);国家自然科学基金(No.22202142);苏州市科技计划项目(No.SYC2022150)。

摘　　要：为提高铋半导体BiOX(X=Cl、Br)光催化剂的可见光利用率,采用水热法制备了Co_(3)O_(4)/BiOBr异质结复合材料,并通过XRD、FT-IR、SEM对其进行了形貌表征,XPS、SEM、XPS、UV-vis DRS和EPR用于分析晶体结构、形貌、元素状态和光吸收特性.同时,研究了Co_(3)O_(4)/BiOBr在可见光下对罗丹明B(RhB)染料的降解作用.结果表明,CO_(3)O_(4)和BiOBr的结合可以扩大光吸收范围,微球形的Co_(3)O_(4)可以大大增加Co_(3)O_(4)/BiOBr异质结的比表面积.多重正交实验表明,当Co_(3)O_(4)与BiOBr的物质的量比为1∶10时,Co_(3)O_(4)/BiOBr对罗丹明B(RhB)染料的降解效率分别是BiOBr和Co_(3)O_(4)的1.89倍和45.45倍.RhB染料可在30 min内完全降解.催化剂的光催化效率在5次循环后仍保持在83%以上.研究表明该催化剂在光催化降解有机污染物方面具有潜在的应用前景.To improve the visible light utilization of bismuth semiconductor BiOX(X=Cl,Br)photocatalysts,Co_(3)O_(4)/BiOBr heterojunction composites were prepared by hydrothermal method and characterized morphologically by XRD,FT-IR,SEM,XPS,SEM,XPS,UV-vis DRS,and EPR were used for analyzing the crystal structure,morphology,elemental states,and light absorption properties.Meanwhile,the rhodamine B(RhB)dye degradation by Co_(3)O_(4)/BiOBr under visible light was investigated.The results show that the combination of Co_(3)O_(4)and BiOBr can expand the light absorption range,and the microspherical Co_(3)O_(4) can greatly increase the specific surface area of the Co_(3)O_(4)/BiOBr heterojunction.Multiple orthogonal experiments showed that the degradation efficiencies of Co_(3)O_(4)/BiOBr for rhodamine B(RhB)dye were 1.89 and 45.45 times higher than those of BiOBr and Co_(3)O_(4),respectively,when the substance amount ratio of Co_(3)O_(4)to BiOBr was 1∶10.RhB dye could be completely degraded within 30 min.The photocatalytic efficiency of the catalyst remained above 83%after 5 cycles.The study demonstrated that the catalyst has potential application in the photocatalytic degradation of organic pollutants.Translated with DeepL.com(free version)

关 键 词：溴化铋 四氧化三钴 光催化 废水净化 罗丹明B 

分 类 号：X703[环境科学与工程—环境工程]