SrB_(4)O_(7)光催化剂的高温固相法合成及其催化机理  

Synthesis and Photocatalytic Mechanism of SrB_(4)O_(7)Photocatalysts by High Temperature Solid Phase Method

作　　者：赵丽宏 周海静[3] 赵文武 ZHAO Li-hong;ZHOU Hai-jing;ZHAO Wen-wu(Tangshan Integrated Law Enforcement Agency for Market Regulation,Tangshan 063000,China;Tangshan Product Quality Supervision and Test Institute,Tangshan 063000,China;School of New Materials and Chemical Engineering,Tangshan University,Tangshan 063000,China)

机构地区：[1]唐山市市场监管综合执法局,唐山063000 [2]唐山市产品质量监督检验所,唐山063000 [3]唐山学院新材料与化学工程学院,唐山063000

出　　处：《中国陶瓷》2024年第5期41-47,共7页China Ceramics

基　　金：唐山市科技计划项目(21130235C)。

摘　　要：以硼酸和碳酸锶作为起始原料,利用高温固相法合成了SrB_(4)O_(7)光催化剂;通过XRD和紫外可见漫反射光谱对不同制备温度条件下合成光催化剂的结构及光吸收性能进行表征;利用光化学反应仪测试光催化剂的光催化性能;通过捕获实验探究了SrB_(4)O_(7)光催化剂的光催化机理。研究结果表明:在800℃、850℃和900℃下合成的SrB_(4)O_(7)光催化剂对罗丹明B的降解率分别为90.2%、84.8%和60.4%;800℃下合成的SrB_(4)O_(7)光催化剂光催化降解有机物过程中主要活性物质是羟基自由基(·OH)和超氧阴离子(O_(2)·-)。SrB_(4)O_(7)photocatalysts were successfully synthesized by the high temperature solid phase method using H3BO3 and SrCO_(3)as starting materials.The crystal structure and light absorption properties of synthesized SrB_(4)O_(7)under the different preparation temperatures were characterized by X ray diffraction(XRD)and UV Vis diffuse reflectance spectroscopy.The photocatalytic properties of SrB_(4)O_(7)photocatalysts were tested by a photochemical reaction instrument.The photocatalytic mechanism of SrB_(4)O_(7)was investigated by a capture experiment.The results show that the degradation rates of rhodamine B under SrB_(4)O_(7)photocatalysts synthesized at 800℃,850℃and 900℃are 90.2%,84.8%and 60.4%,respectively.The main active substances in the photocatalytic degradation of organic compounds under the SrB_(4)O_(7)photocatalyst synthesized at 800℃are hydroxyl radical(·OH)and superoxide anion(O_(2)·-).

关 键 词：硼酸盐 高温固相法 光催化降解 SrB_(4)O_(7) 

分 类 号：O643.36[理学—物理化学] O643.31[理学—化学]