二维BiOX光催化去除废水中RhB的研究  

Research on photocatalytic removal of RhB from wastewater over 2D BiOX

作　　者：张飞耀 吴嘉薇 郑红亮 连晓燕 ZHANG Fei-yao;WU Jia-wei;ZHENG Hong-liang;LIAN Xiao-yan(Key Laboratory of Advanced Molecular Engineering Materials,College of Chemistry and Chemical Engineering,Baoji University of Arts and Sciences,Baoji 721013,Shaanxi,China;Shaanxi Changling Electronic Technology Co.,LTD,Baoji 721006,Shaanxi,China)

机构地区：[1]宝鸡文理学院化学化工学院先进分子工程材料重点实验室,陕西宝鸡721013 [2]陕西长岭电子科技有限责任公司,陕西宝鸡721006

出　　处：《宝鸡文理学院学报（自然科学版）》2024年第2期43-49,共7页Journal of Baoji University of Arts and Sciences(Natural Science Edition)

基　　金：宝鸡文理学院2023年大学生创新创业训练计划项目(202310721018);陕西省教育厅专项科学研究计划项目(23JK0289)。

摘　　要：目的研究二维(2D)卤氧化铋(BiOX,X=Cl,Br,I)对水中罗丹明B(RhB)的去除性能和机理。方法通过溶剂热法合成2D BiOX。借助多种表征手段对BiOX的结构、形貌、光学性质等进行分析;研究紫外-可见光照下2D BiOX对水中RhB的光催化去除性能。结果BiOCl催化作用下,光照180 min后,RhB降解率可达98.8%。过程符合拟一阶反应动力学模型,反应速率常数k为22.9×10^(-3)min^(-1)。以叔丁醇和氯仿为捕获剂时,RhB降解率无明显变化;而以乙二胺四乙酸二钠和重铬酸钾为捕获剂时,RhB降解率显著下降。结论BiOCl的光催化活性高,可归因于其较快的载流子传递速率和较强的氧化还原能力。RhB光催化降解过程中起主要作用的活性物种为h^(+)和e^(-)。Purposes—To study the removal performance and mechanism of Rhodamine B(RhB)from water over two-dimensional(2D)halide bismuth oxide(BiOX,X=Cl,Br,I).Methods—2D BiOX was synthesized with solvothermal method.The structure,morphology and optical properties of BiOX materials were analyzed with multiple characterization methods.The photocatalytic removal performance of RhB from water over 2D BiOX under UV-Vis light irradiation was investigated.Results—The degradation rate of RhB reaches 98.8%over BiOCl photocatalyst after RhB is exposed to light for 180 min.The degradation process accords to the pseudo-first-order reaction kinetics model with the reaction rate constant of 22.9×10^(-3) min^(-1).Under the catalysis of BiOCl,when TBA and CHCl 3 were used as trapping agents,the degradation rate of RhB has no significant change.However,when EDTA-2Na and K_(2)Cr_(2)O_(7) were used as trapping agents,the degradation rate of RhB decreases obviously.Conclusions—The highest photocatalytic activity of BiOCl can be attributed to its fast carrier transfer rate and strong redox ability.The active species which play a key role in the reaction process are holes and electrons.

关 键 词：2D BiOX 光催化 RHB 机理 

分 类 号：O643.36[理学—物理化学]