Monoclinic KNbO3 Nanowires for Photocatalytic Methane Production and Dye Degradation  

作　　者：钱勤枫 胡建强 胡颖飞 黄辉庭 张世英 李朝升 邹志刚 

机构地区：[1]Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, and College of Engineering and Applied Sciences, Nanjing University [2]Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University

出　　处：《Chinese Journal of Structural Chemistry》2017年第5期723-728,共6页结构化学（英文）

基　　金：supported by the National Basic Research Program of China(973 Program,2013CB632400);the Priority Academic Program Development of Jiangsu Higher Education Institutions;the National Natural Science Foundation of China(Nos.51272102 and 21103070)

摘　　要：The room temperature stabled monoclinic KNbO3 nanowires were found to act as photocatalyst for photocatalytic methane production and dye degradation in this work. Higher activities have been observed for monoclinic phase compared to the reference（orthorhombic phase）. In the photoreduction of CO2 reaction, the monoclinic KNbO3 nanowires exhibited a CH4 evolution rate of 0.025 μmol·g-1·h-1, which was higher than 0.021 μmol·g-1·h-1 of orthorhombic KNbO3 nanowires. In the photodegradation of rhodamine B（Rh B）, almost all the Rh B were degraded after 90 min light illumination for monoclinic KNbO3 nanowires. But for orthorhombic KNbO3 nanowires, the concentration of Rh B only decreased to 62% of the initial value.The room temperature stabled monoclinic KNbO3 nanowires were found to act as photocatalyst for photocatalytic methane production and dye degradation in this work. Higher activities have been observed for monoclinic phase compared to the reference（orthorhombic phase）. In the photoreduction of CO2 reaction, the monoclinic KNbO3 nanowires exhibited a CH4 evolution rate of 0.025 μmol·g-1·h-1, which was higher than 0.021 μmol·g-1·h-1 of orthorhombic KNbO3 nanowires. In the photodegradation of rhodamine B（Rh B）, almost all the Rh B were degraded after 90 min light illumination for monoclinic KNbO3 nanowires. But for orthorhombic KNbO3 nanowires, the concentration of Rh B only decreased to 62% of the initial value.

关 键 词：KNbO3 nanowires monoclinic phase photocatalytic activities methane production dye degradation 

分 类 号：O643.36[理学—物理化学] TB383.1[理学—化学]