| BiOBr-OV/RGO复合物的制备及其光催化CO2还原性能 | |
| Preparation and photocatalytic CO2 reduction performance of BiOBr-OV/RGO composite | |
| 摘要: 采用水热合成方法先制得四方相BiOBr纳米片与还原氧化石墨烯（RGO）相结合的二元复合物BiOBr/RGO，再经真空热处理获得富含氧空位（OV）的复合光催化剂BiOBr-OV/RGO。通过一系列分析测试方法对样品的结构、组成和光电性能进行了表征。BiOBr-OV/RGO表现出了最佳的模拟太阳光光催化CO2还原活性，主要还原产物CO的生成速率达到15.67 μmol·g-1·h-1，分别是纯BiOBr、BiOBr-OV和BiOBr/RGO的4.5倍、2.5倍和1.4倍，体现了OV和RGO协同增强的可见光吸收和促进光生载流子在空间上的分离作用，从而提高光催化反应活性。 | |
| 关键词: BiOBr 氧空位 还原氧化石墨烯 光催化 CO2还原 | |
| 基金项目: 安徽省高校学科（专业）拔尖人才学术资助项目（No.gxbjZD2021085）、安徽省先进建筑材料重点实验室开放课题项目（No.JZCL002KF）、国家级大学生创新创业训练计划项目（No.202111059032）和合肥学院研究生创新项目（No.21YCXL42）资助 | |
| Abstract: The binary composite (BiOBr/RGO) composed of tetragonal BiOBr nanosheet and reduced graphene oxide (RGO) was firstly prepared by hydrothermal synthesis method, and then photocatalyst BiOBr-OV/RGO with the rich oxygen vacancy (OV) was further obtained by vacuum heat treatment. The crystal structure, chemical composition, and photoelectric properties were characterized by various techniques. The as-prepared BiOBr-OV/RGO composite photocatalyst exhibited the best photocatalytic activity for photocatalytic CO2 reduction under the simulated solar light. The best evolution rate of the main reduction product CO reached 15.67 μmol·g-1·h-1, which was 4.5, 2.5, and 1.4 times that of pure BiOBr, BiOBr-OV, and BiOBr/RGO, respectively. Furthermore, the photocatalytic reaction mechanism for BiOBr-OV/RGO could be attributed to the enhanced visible light absorption and the efficient photogenerated charge carrier separation, thereby boosting the photocatalytic reaction activity. | |
| Keywords: BiOBr oxygen vacancy reduced graphene oxide photocatalysis CO2 reduction | |
| 投稿时间：2022-07-17 修订日期：2022-11-19 | |
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| 胡寒梅,王韬,凌晓慧,彭璐璐,王涛,何云云,孙雨婷,邓崇海.BiOBr-OV/RGO复合物的制备及其光催化CO2还原性能[J].无机化学学报,2023,39(2):234-244. | |
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