SrB4O7光催化剂的高温固相法合成及其催化机理
Synthesis and Photocatalytic Mechanism of SrB4O7 Photocatalysts by High Temperature Solid Phase Method
赵丽宏 1周海静 2赵文武2
作者信息
- 1. 唐山市市场监管综合执法局,唐山 063000;唐山市产品质量监督检验所,唐山 063000
- 2. 唐山学院新材料与化学工程学院,唐山 063000
- 折叠
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 SrB4O7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 SrB4O7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SrB4O7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SrB4O7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(O2·-).
Abstract
SrB4O7 photocatalysts were successfully synthesized by the high temperature solid phase method using H3BO3 and SrCO3 as starting materials.The crystal structure and light absorption properties of synthesized SrB4O7 under the different preparation temperatures were characterized by X ray diffraction(XRD)and UV Vis diffuse reflectance spectroscopy.The photocatalytic properties of SrB4O7 photocatalysts were tested by a photochemical reaction instrument.The photocatalytic mechanism of SrB4O7 was investigated by a capture experiment.The results show that the degradation rates of rhodamine B under SrB4O7 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 SrB4O7 photocatalyst synthesized at 800 ℃ are hydroxyl radical(·OH)and superoxide anion(O2·-).
关键词
硼酸盐/高温固相法/光催化降解/SrB4O7Key words
Borate/High temperature solid phase method/Photocatalytic degradation/SrB4O7引用本文复制引用
出版年
2024
NETL
NSTL
万方数据