title: Merging of memory effect and anion intercalation: MnOx-decorated MgAl-LDO as a high-performance nano-adsorbent for the removal of methyl orange.
abstract: MnOx-decorated MgAl layered double oxide (M-LDO) was fabricated via merging of memory effect and anion intercalation, accompanied by the reduction/calcination process. The as-obtained nanocomposites were characterized by scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD) and N2 adsorption-desorption. To clarify the detailed formation mechanism, optimized calcination temperature/time and temperature for methyl orange (MO) adsorption were investigated. Adsorption experiments showed that the adsorption behaviour fitted well with a Langmuir isotherm and pseudo-second-order model, and the maximum adsorption capacity calculated from the Langmuir model was 555.55 mg g(-1). The adsorption process was exothermic and spontaneous in nature. Moreover, the used adsorbent could be regenerated for at least five cycles (94% removal retained) through a thermal procedure, indicating that the M-LDO hybrid is a promising adsorbent with promising ability to remove anionic dye pollutants from wastewater.
authors.affiliation: College of Resources and Environmental Science, State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China. chenjie_cqu@163.com.
authors.forename: Hui Hua
authors.initials: HH
authors.lastname: Peng
authors.affiliation: College of Resources and Environmental Science, State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China. chenjie_cqu@163.com.
authors.forename: Jie
authors.initials: J
authors.lastname: Chen
authors.affiliation: College of Resources and Environmental Science, State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China. chenjie_cqu@163.com.
authors.forename: De Yi
authors.initials: de Y
authors.lastname: Jiang
authors.affiliation: College of Materials Science and Engineering, Key Laboratory of Fundamental Science of Micro/Nano-Devices and System Technology, Chongqing University, Chongqing 400044, PR China. zhangyuxin@cqu.edu.cn.
authors.forename: Xiao Long
authors.initials: XL
authors.lastname: Guo
authors.affiliation: College of Materials Science and Engineering, Key Laboratory of Fundamental Science of Micro/Nano-Devices and System Technology, Chongqing University, Chongqing 400044, PR China. zhangyuxin@cqu.edu.cn.
authors.forename: Hao
authors.initials: H
authors.lastname: Chen
authors.affiliation: College of Materials Science and Engineering, Key Laboratory of Fundamental Science of Micro/Nano-Devices and System Technology, Chongqing University, Chongqing 400044, PR China. zhangyuxin@cqu.edu.cn.
authors.forename: Yu Xin
authors.initials: YX
authors.lastname: Zhang