草酸协同ZrO_(2)-(NH_(4))_(3)PW_(12)O_(40)复合催化剂降解罗丹明B及其机理  

Degradation mechanism of Rhodamine B by oxalic acid and ZrO_(2)-(NH_(4))_(3)PW_(12)O_(40)composite photocatalyst

作　　者：冯少凡 李征[2] 李静 FENG Shao-fan;LI Zheng;LI Jing(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China;China First Design & Research Insitute,North China Municipal Engineering Design &Research Insitute,Tianjin 300074,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]中国市政工程华北设计研究总院第一设计研究院,天津300074

出　　处：《应用化工》2021年第11期3022-3026,共5页Applied Chemical Industry

基　　金：河北省住房和城乡建设厅科研项目(2014-230)。

摘　　要：通过水热、沉淀两步法制备ZrO_(2)-(NH_(4))_(3)PW_(12)O_(40)复合材料,采用SEM、TEM、XPS、UV-Vis DRS和电化学测试等进行表征。结果表明,ZrO_(2)附着在(NH_(4))_(3)PW_(12)O_(40)表面,对紫外光的吸收能力增强;电化学测试表明,ZrO_(2)-(NH_(4))_(3)PW_(12)O_(40)的载流子分离效率高于单体。草酸浓度为1 mmol/L,初始pH为2,ZrO_(2)-(NH_(4))_(3)PW_(12)O_(40)在30 min内光催化降解RhB效率达到99.7%。自由基捕获实验表明,O_(2)·^(-)为主要活性物种,草酸产生的CO_(2)·^(-)与h^(+)产生O_(2)·^(-),促进光催化反应。ZrO_(2)-(NH_(4))_(3)PW_(12)O_(40)composites were prepared by a two-step hydrothermal precipitation method.ZrO_(2)-(NH_(4))_(3)PW_(12)O_(40)was characterized by SEM,TEM,XPS,UV-Vis DRS and electrochemical test.The results show that ZrO_(2)is attached to the surface of(NH_(4))_(3)PW_(12)O_(40)and the composite is successful,and the ultraviolet absorption ability is enhanced.Electrochemical tests show that the carrier separation efficiency of ZrO 2-(NH 4)3PW 12 O 40 is higher than that of the monomer.When the concentration of oxalic acid was 1 mmol/L and the initial pH was 2,the photocatalytic degradation efficiency of RhB by ZrO_(2)-(NH_(4))_(3)PW_(12)O_(40)was 99.7%in 30 min.The results of free radical capture experiments show that O_(2)·^(-)is the main active species,and CO_(2)·^(-)generated by oxalate and h^(+)generate O_(2)·^(-)to promote the photocatalytic reaction.

关 键 词：草酸根 光催化 罗丹明B 

分 类 号：TQ139.1[化学工程—无机化工] O644.1[理学—物理化学]