rGO/TNTs光催化剂协同降解水中Cr(Ⅵ)与苯酚的性能

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英文篇名：Performance and mechanism of synergistic removals of Cr(Ⅵ) and phenol from aqueous media by rGO/TNTs composite photocatalyst 作者：李红艳 ; 李玉鉴 ; 崔建国 ; 王芳 ; 李超 ; 李尚明 英文作者：Li Hongyan;Li Yujian;Cui Jianguo;Wang Fang;Li Chao;Li Shangming;College of Environmental Science and Engineering,Taiyuan University of Technology;Innovation Center for Postgraduate Education in Municipal Engineering of Shanxi Province;Research Center for Edible Fungi,Biological Institute of Shanxi Province;The First Design Department,Shouan Industrial Fire Company;College of Material Science and Engineering,Taiyuan University of Technology; 关键词：rGO/TNTs ; Cr(Ⅵ)还原 ; 苯酚氧化 ; 活性物种 英文关键词：rGO/TiO2 nanotubes;;Cr(Ⅵ) reduction;;phenol oxidation;;active species 中文刊名：工业水处理 英文刊名：Industrial Water Treatment 机构：太原理工大学环境科学与工程学院;山西省市政工程研究生教育创新中心;山西省生物研究所食用菌研究中心;首安工业消防有限公司第一设计部;太原理工大学材料科学与工程学院; 出版日期：2019-10-20 出版单位：工业水处理 年：2019 期：10 基金：山西省重点研发计划项目(社会发展领域)(201803D31046);山西省重点研发计划项目(农业领域)(201703D211013);; 山西省研究生联合培养基地人才培养项目(2018JD19) 语种：中文; 页：40-44 页数：5 CN：12-1087/X ISSN：1005-829X 分类号：X703

摘要

采用水热法将GO和TNTs复合,制备了一种新型还原氧化石墨烯/二氧化钛纳米管复合材料(r GO/TNTs)。采用BET、XRD、FT-IR对制备的材料进行了表征,并研究了r GO/TNTs协同降解水中Cr(Ⅵ)和苯酚的性能。结果表明,在Cr(Ⅵ)和苯酚共存二元体系中,r GO/TNTs对Cr(Ⅵ)和苯酚的光催化降解反应动力学常数约为其各自单体系的6.3倍和1.2倍;低pH可促进Cr(Ⅵ)和苯酚的去除,而共存无机阴离子对其具有抑制作用。·OH和空穴主导苯酚降解,光生电子直接还原Cr(Ⅵ)。
        In this study,a novel reduced graphene oxide/titanium dioxide nanotube composite material(rGO/TNTs)was successfully synthesized by the combination of GO and TNTs through hydrothermal reaction. Then the prepared samples of rGO/TNTs were characterized by BET,XRD,and FT-IR,respectively. Finally,the prepared nanotubes were applied to degrade the Cr(Ⅵ) and phenol from water synergistically. The enhanced photocatalytic removals of coexistent Cr(Ⅵ) and phenol by rGO/TNTs were observed in binary systems,and their kinetic constants were about6.3 and 1.2 times those in the respective single systems. The low pH were found to improve the removals of Cr (Ⅵ)and phenol,while the coexisting inorganic anions had negative effects. In addition,hydroxyl radical and holes were proved to dominate the phenol degradation,whereas photogenerated electrons directly reduced the Cr(Ⅵ).

引文

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