工业水处理 ›› 2016, Vol. 36 ›› Issue (7): 43-47,67. doi: 10.11894/1005-829x.2016.36(7).043

• 试验研究 • 上一篇    下一篇

负载铬钴石墨烯基材料对汞(Ⅱ)的吸附性能研究

王卓, 邓娟, 朱君妍, 周超, 周晓吉, 郭永福, 白仁碧   

  1. 苏州科技学院分离净化材料与技术研发中心, 江苏苏州 215009
  • 修回日期:2016-03-31 出版日期:2016-07-20 发布日期:2016-08-10
  • 通讯作者: 郭永福,博士,副教授,硕导。电话:13701546901,E-mail:yongfuguo@163.com。 E-mail:yongfuguo@163.com
  • 作者简介:王卓(1989—),硕士。E-mail:654862590@qq.com。
  • 基金资助:

    国家自然科学基金项目(51578354);江苏省科技厅自然科学基金项目(BK20141179);苏州市科技支撑计划项目(SS201334);江苏省“青蓝工程”资助项目;苏州市分离净化材料与技术重点实验室(SZS201512)

Study on the adsorption capacity for mercury(Ⅱ) with chromium/cobalt-doped graphene oxide materials

Wang Zhuo, Deng Juan, Zhu Junyan, Zhou Chao, Zhou Xiaoji, Guo Yongfu, Bai Renbi   

  1. Center for Separation and Purification Materials & Technologies, Suzhou University of Science and Technology, Suzhou 215009, China
  • Revised:2016-03-31 Online:2016-07-20 Published:2016-08-10

摘要:

利用石墨烯的还原性与过渡金属盐类的氧化性,制备得到分别负载有铬和钴的还原氧化石墨烯(RGO)复合材料RGO/Cr和RGO/Co,并将其应用于对Hg2+的吸附。结果表明:RGO/Cr比RGO/Co及RGO具有更大比表面积,负载铬和钴后RGO的亲水性能显著增加。Langmuir拟合RGO、RGO/Cr、RGO/Co对Hg2+的理论单层最大吸附容量分别为128.98、181.86、146.86 mg/g,同时吸附过程均符合伪一级和伪二级动力学模型。

关键词: 石墨烯, 吸附, 汞, 吸附动力学

Abstract:

The chromium and cobalt doped reduced graphene oxide(RGO/Cr,RGO/Co) composite materials have been synthesized by making use of the reducibility of RGO and the oxidability of transition metallic salts,and applied to the adsorption for Hg2+. The results show that the specific surface area of RGO/Cr is higher than that of RGO/Co and RGO. The hydrophilicity of RGO is effectively improved after having been doped with chromium or cobalt. The theoretical monolayer adsorption capacities of RGO,RGO/Cr and RGO/Co fitting Langmuir model are 128.98,181.86, and 146.86 mg/g,respectively,and the adsorption processes of these three materials complies with the pseudo-first-order and pseudo-second-order kinetic model.

Key words: reduced graphene oxide, adsorption, mercury, adsorption kinetics

中图分类号: