Facile preparation of sepiolite@LDH composites for the visible-light degradation of organic dyes

作     者：Li Jin Hong‐Yan Zeng Sheng Xu Chao‐Rong Chen Heng‐Zhi Duan Jin‐Ze Du Guo Hu Yun‐Xin Sun 金力;曾虹燕;徐圣;陈超容;段恒志;杜金泽;胡果;孙云鑫

作者机构：College of Chemical EngineeringXiangtan UniversityXiangtan 411105HunanChina 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2018年第39卷第11期

页      面：1832-1841页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the Joint Research Program of Hunan Provincial Natural Science Foundation(Xiangtan)of China(2016JJ5030) Hunan 2011 Collaborative Innovation Center of Chemical Engineering&Technology with Environmental Benignity and Effective Resource Utilization and General project of Hunan Provincial Education Department(17C1526) PhD Startup Foundation of Xiangtan University(17QDZ05) Xiangtan University undergraduate innovative experiment program(2017XJ067)~~ 

主　　题：Layered double hydroxides Sepiolite Photocatalytic performance Water treatment Nano materials 

摘      要：Sepiolite@LDH(Sep@LDH)composites were designed and prepared based on the assembly of layered double hydroxides(LDH)on acidified sepiolites(Sep)for the simultaneous photocatalytic degradation of methyl orange(MO)and methylene blue(MB).The structure,morphology,texture,optical properties,and photocatalytic performance of the prepared Sep@LDH were studied in *** the Sep@LDH composites,Sep4@LDH(4.0 g Sep)exhibited the highest photocatalytic activity under visible‐light irradiation,which could be attributed to its large surface area,high crystallinity,and plentiful active sites on its *** photodegradation of the dyes followed a pseudo first‐order kinetic model(Langmuir‐Hinshelwood model),indicating that the copious and homogeneous active sites on the surface of the composites contributed to the high photocatalytic *** photodegradation mechanism was studied by examining the active species(^-OH,h+,and·O2^-anions)using appropriate *** was found that·OH radicals played a critical role in the photocatalytic process of MO and MB,where the generation of·OH radicals occurred on the electron/hole(e^-/h+)pairs on the surface of the Sep@LDH composites.