Zhang Lingyun, Dai Zhenxiang, Zheng Ganhong, Yao Zifeng, Mu Jingjing
Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University Hefei 230039 China
Department of Chemical and Material Engineering, Hefei University Hefei 230601 China.
RSC Adv. 2018 Mar 16;8(19):10654-10664. doi: 10.1039/c8ra00554k. eCollection 2018 Mar 13.
Reticular BiVO catalysts were successfully synthesized a modified sol-gel method. Here, citric acid (CA) was used as the chelating agent and ethylenediaminetetraacetic acid (EDTA) was used as the chelating agent and template. Furthermore, the effects of pH values and EDTA on the structure and morphology of the samples were studied. We determined that EDTA and pH played important roles in the determination of the morphology of the as-prepared BiVO samples. Photocatalytic evaluation revealed that the reticular BiVO exhibited superior photocatalytic performance characteristics for the degradation of methylene blue (MB) under visible-light ( > 400 nm) exposure, about 98% of the MB was found to degrade within 50 min. Moreover, the degradation kinetics of MB was in good agreement with pseudo-first-order kinetics. The obtained apparent reaction rate constant of reticular BiVO was much higher than that of BiVO synthesized by the citric acid sol-gel method.
采用改进的溶胶-凝胶法成功合成了网状BiVO催化剂。在此，柠檬酸（CA）用作螯合剂，乙二胺四乙酸（EDTA）用作螯合剂和模板。此外，研究了pH值和EDTA对样品结构和形貌的影响。我们确定EDTA和pH值在制备的BiVO样品形貌的确定中起重要作用。光催化评估表明，网状BiVO在可见光（>400nm）照射下对亚甲基蓝（MB）的降解表现出优异的光催化性能特征，发现约98%的MB在50分钟内降解。此外，MB的降解动力学与准一级动力学吻合良好。所得网状BiVO的表观反应速率常数远高于通过柠檬酸溶胶-凝胶法合成的BiVO。
