镁铝水滑石衍生金属氧化物/碳纳米片的制备及其吸附甲基橙性能  

Preparation of Mg-Al hydrotalcite derived metal oxides/carbon nanosheets and its adsorption performance for methyl orange

作　　者：方超 严朝雄[1] 王能欢 黄刚 徐志花[1] FANG Chao;YAN Zhao-xiong;WANG Neng-huan;HUANG Gang;XU Zhi-hua(Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,Hubei Key Laboratory of Industrial Fume and Dust Pollution Control,Jianghan University,Wuhan 430056,Hubei,China)

机构地区：[1]江汉大学光电化学材料与器件教育部重点实验室,工业烟尘污染控制湖北省重点实验室,湖北武汉430056

出　　处：《黄冈师范学院学报》2021年第3期72-76,130,共6页Journal of Huanggang Normal University

基　　金：国家自然科学基金面上项目(21871111);湖北省杰出青年基金项目(2019CFA078)。

摘　　要：本工作采用水热-煅烧法制备了镁铝水滑石衍生金属氧化物/碳纳米片吸附剂(Mg-Al LDOs/C),用X-射线衍射、热重、扫描电镜、透射电镜和红外光谱等手段研究了不同煅烧时间下获得的Mg-Al LDOs/C吸附剂的相组成、微观形貌及表面化学性质。吸附实验表明:所有样品对水环境中甲基橙的吸附均符合准二级动力学行为,颗粒内扩散模型表明甲基橙在所制备的样品上存在三个阶段的吸附过程。在400℃保温1 h时获得的镁铝氧化物/碳样品吸附性能最好,并且还表现出较好的重复利用稳定性。In this work,Mg-Al hydrotalcite derived metal oxides/carbon nanosheets(Mg-Al LDOs/C)adsorbents were prepared via a hydrothermal-calcination process.The phase structure,micromorphology and surface chemical property of the adsorbents were investigated by XRD,TG,SEM,TEM and FTIR technologies.The adsorption performance results showed that the adsorption of methyl orange over the adsorbents well obeyed a kinetic pseudosecond-order model,and the intragranular diffusion model well described three-stage adsorption in the whole process.The adsorbent calcinated for 1 h exhibited the best adsorption performance for methyl orange companied with a good recyclable stability.

关 键 词：甲基橙 镁铝水滑石 水热合成 碳纳米片 

分 类 号：O643.36[理学—物理化学]