中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 近代物理研究所
  3. 中国科学院近代物理研究所
Increased structural defects of graphene oxide compromised reductive capacity of ZVI towards hexavalent chromium

文献类型：期刊论文

作者Yang, Xianni1,5; Hu, Linlin2; Bai, Jing3; Mao, Xiaoyun4; Chen, Xian4; Wang, Xiaozhi1,5; Wang, Shengsen1,3,5
刊名CHEMOSPHERE
出版日期2021-08-01
卷号277页码:8
关键词Heavy metals Zerovalent iron Electron transfer Graphene oxide Irradiation Oxygen content
ISSN号0045-6535
DOI10.1016/j.chemosphere.2021.130308
通讯作者Wang, Xiaozhi(xzwang@yzu.edu.cn) ; Wang, Shengsen(wangss@yzu.edu.cn)
英文摘要Graphene oxide (GO) was treated with irradiation beams to understand the defective degree of carbon structure of GO in relation to electron transfer property of impregnated zerovalent iron (ZVI). The GO-supported ZVI (ZVI/GO) was synthesized and then characterized by an X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The results showed that the oxygen-bearing functional groups, oxygen content and structural disorder were increased as a function of irradiation beam intensity. ZVI was dominant in the composites, but proportion of iron oxide increased with greater oxygen content. Batch sorption revealed that Cr(VI) removal decreased from 20.11 g kg(-1) to 2.30 g.kg(-1) as solution pH rose from 3 to 9. Cr(VI) removal capacity was 26.39 g.kg(-1), 23.12 g.kg(-1) and 12.35 g.kg(-1) for ZVI/GO(0), ZVI/GO(12.3) and ZVI/GO(36.9), respectively. The reduction capacity of sorbents followed similar trends as Cr(VI) sorption as per desorption experiment, which accounted for a major Cr(VI) detoxification mechanism by ZVI/GO composites. The electrochemical tests demonstrated that unfavorable electron transfer rate of ZVI/GO composites was aggravated by greater structural disorder of GO. Thus, higher dose of irradiations could create more disorder in graphitic carbon and promote oxidation of ZVI, which hindered Cr(VI) reduction. (C) 2021 Elsevier Ltd. All rights reserved.
WOS关键词CR(VI) REMOVAL ; ADSORPTION ; BIOCHAR ; WATER ; TRANSFORMATION ; CHROMATE ; VI
资助项目National Natural Science Foundation of China[41977117] ; National Natural Science Foundation of China[41771349] ; National Natural Science Foundation of China[41977085] ; National Natural Science Foundation of China[42007084] ; Qing Lan Project of Yangzhou University ; High-level Talent Support Plan of Yangzhou University ; Science and Technology Project of Guangdong Province[2017A050501029]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000648342100075
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China ; Qing Lan Project of Yangzhou University ; High-level Talent Support Plan of Yangzhou University ; Science and Technology Project of Guangdong Province
源URL[http://119.78.100.186/handle/113462/137256]  
专题中国科学院近代物理研究所
通讯作者Wang, Xiaozhi; Wang, Shengsen
作者单位1.Yangzhou Univ, Joint Int Res Lab Agr & Agriprod Safety, Minist Educ China, Yangzhou 225127, Jiangsu, Peoples R China
2.Shandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Shandong, Peoples R China
3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
4.South China Agr Univ, Guangdong Prov Key Lab Ecocircular Agr, Guangzhou 510642, Guangdong, Peoples R China
5.Yangzhou Univ, Coll Environm Sci & Engn, Minist Educ China, Yangzhou 225127, Jiangsu, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Xianni,Hu, Linlin,Bai, Jing,et al. Increased structural defects of graphene oxide compromised reductive capacity of ZVI towards hexavalent chromium[J]. CHEMOSPHERE,2021,277:8.
APA Yang, Xianni.,Hu, Linlin.,Bai, Jing.,Mao, Xiaoyun.,Chen, Xian.,...&Wang, Shengsen.(2021).Increased structural defects of graphene oxide compromised reductive capacity of ZVI towards hexavalent chromium.CHEMOSPHERE,277,8.
MLA Yang, Xianni,et al."Increased structural defects of graphene oxide compromised reductive capacity of ZVI towards hexavalent chromium".CHEMOSPHERE 277(2021):8.

入库方式： OAI收割

来源：近代物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。