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Synthesis of molybdenum disulfide/reduced graphene oxide composites for effective removal of Pb(II) from aqueous solutions

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成果类型:
期刊论文
作者:
Du, Yi;Wang, Jian;Zou, Yidong;Yao, Wen;Hou, Jing;Xia, Liangshu;Peng, Anguo;Alsaedi, Ahmed;Hayat, Tasawar;Wang, Xiangke
通讯作者:
Hou, J.
作者机构:
[Du, Yi; Wang, Jian; Zou, Yidong; Yao, Wen; Hou, Jing; Wang, Xiangke] College of Environmental Science and Engineering, North China Electric Power University (Beijing)
[Xia, Liangshu; Peng, Anguo] School of Nuclear Science and Technology, University of South China
[Alsaedi, Ahmed; Hayat, Tasawar] NAAM Researc
通讯机构:
[Hou, J; Wang, XK] North China Elect Power Univ, Coll Environm Sci & Engn, Beijing 102206, Peoples R China.
[Peng, AG; Wang, XK] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
[Wang, Xiangke] King Abdulaziz Univ, NAAM Res Grp, Fac Sci, Jeddah 21589, Saudi Arabia.
[Wang, Xiangke] Soochow Univ, Sch Radiol & Interdisciplinary Sci, Collaborat Innovat Ctr Radiat Med Jiangsu Higher, Suzhou 215123, Peoples R China.
语种:
英文
关键词:
Adsorption;MoS2/rGO composites;Molybdenum disulfide;Pb(II);Reduced graphene oxide
期刊:
Science Bulletin
期刊(中文):
科学通报(英文版)
ISSN:
2095-9273
年:
2017
卷:
62
期:
13
页码:
913-922
基金类别:
supported by Science Challenge Project (JCKY2016212A04); the National Natural Science Fondation of China(91326202,21577032,and 21403064); the Fundamental Research Funds for the Central Universities(JB2015001); the National Special Water Programs(2015ZX07203-011,2015ZX07204-007);
机构署名:
本校为通讯机构
院系归属:
核科学技术学院
摘要:
In this work, a facile method was adopted to synthesize molybdenum disulfide/reduced graphene oxide (MoS_2/rGO) composites through an L-cysteine-assisted hydrothermal technique. The as-prepared MoS_2/ rGO composites were firstly applied as adsorbents for efficient elimination of Pb(II) ions. Batch adsorption experiments showed that the adsorption of Pb(II) on MoS_2/rGO followed pseudo-second-order kinetic model well. The adsorption of Pb(II) was intensely pH-dependent, ionic strength-dependent at pH < 9.0 and ionic strength-independent at pH > 9.0. The presence of humic acid (HA) enhanced Pb(II) adsorption obviously. The MoS_2/rGO composites exhibited excellent adsorption capacity of 384.16 mg g~(-1) at pH 5.0 and T=298.15 K, which was superior to MoS_2 (279.93 mg g~(-1)) and many other adsorbents. The thermodynamic parameters suggested that the adsorption process of Pb(II) on MoS_2/rGO composites was spontaneous (?G~θ < 0) and endothermic (?H~θ > 0). The interaction of Pb(II) and MoS_2/ rGO was mainly dominated by electrostatic attraction and surface complexation between Pb(II) and oxygen-containing functional groups of MoS_2/rGO. This work highlighted the application of MoS_2/rGO as novel and promising materials in the efficient elimination of Pb(II) from contaminated water and industrial effluents in environmental pollution management.

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