Preparation of activated graphene oxide and its adsorption for methly orange

doi:10.11894/1005-829x.2016.36(5).066

INDUSTRIAL WATER TREATMENT ›› 2016, Vol. 36 ›› Issue (5): 66-70. doi: 10.11894/1005-829x.2016.36(5).066

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Preparation of activated graphene oxide and its adsorption for methly orange

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

Center for Separation and Purification Materials & Technologies, Suzhou University of Science and Technology, Suzhou 215009, China

Received:2016-02-20 Online:2016-05-20 Published:2016-06-24

活化氧化石墨烯的制备及对甲基橙的吸附

周彩云, 邓娟, 朱君妍, 周超, 郭永福, 周晓吉, 白仁碧

苏州科技大学, 分离净化材料与技术研发中心, 江苏苏州 215009

通讯作者: 郭永福,博士,副教授,硕士研究生导师。E-mail:yongfuguo@163.com。 E-mail:yongfuguo@163.com
作者简介:周彩云(1989-),硕士。E-mail:1257340586@qq.com。
基金资助:
江苏省自然科学基金资助项目(BK20141179);苏州市分离净化材料与技术重点实验室(SZS201512);江苏省"青蓝工程"资助项目;苏州科技学院研究生培养创新工程(SKCX14_026);江苏省大学生实践创新训练计划项目(201410332005Z);江苏省普通高校研究生科研创新计划项目(SJZZ15_0170)

Abstract

Abstract:

In order to improve the specific surface area and adsorption capacity of graphene oxide (GO),GO_KOH has been synthesized with KOH by high temperature solid state activation,and it is used for the research on its adsorption for anionic dye methyl orange (MO) in water.The results show that the specific surface area of activated GO_KOH can reach 672.48 m²/g.GO_KOH can effectively remove MO in a wide range of pH and the MO removing rate is as high as 94.87%,and the time of adsorption equilibrium is 150 min.The pseudo first order kinetics and pseudo second order kinetics fitted theoretical equilibrium adsorption capacities are 549.87 mg/g and 549.45 mg/g,respectively,and the saturated adsorption capacity of Langmuir model is 632.91 mg/g.The adsorption process is controlled by two different steps:boundary layer diffusion and inside particle diffusion.It is in line with the 2nd level dynamics model and Langmuir model,and it is mainly chemical adsorption.

Key words: activated graphene oxide, methyl orange, adsorption

摘要：

为了提高氧化石墨烯(GO)的比表面积和吸附性能,采用氢氧化钾对GO进行高温固相活化,制备出活化氧化石墨烯(GO_KOH),并将其用于对水中阴离子染料甲基橙(MO)的吸附研究。结果表明,GO_KOH的比表面积可达672.48 m²/g。GO_KOH能在较宽的pH范围内实现对MO的高效去除,去除率高达94.87%,吸附平衡时间约为150 min。准一级和准二级动力学拟合的理论平衡吸附容量分别为549.87 mg/g和549.45 mg/g,Langmuir模型的饱和吸附容量为632.91 mg/g。该吸附过程受边界层扩散与颗粒内扩散两个步骤控制,符合二级动力学模型和Langmuir模型,并主要以化学吸附为主。

关键词: 氧化石墨烯, 甲基橙, 吸附

CLC Number:

X703.1

Zhou Caiyun, Deng Juan, Zhu Junyan, Zhou Chao, Guo Yongfu, Zhou Xiaoji, Bai Renbi. Preparation of activated graphene oxide and its adsorption for methly orange[J]. INDUSTRIAL WATER TREATMENT, 2016, 36(5): 66-70.

周彩云, 邓娟, 朱君妍, 周超, 郭永福, 周晓吉, 白仁碧. 活化氧化石墨烯的制备及对甲基橙的吸附[J]. 工业水处理, 2016, 36(5): 66-70.

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https://www.iwt.cn/EN/Y2016/V36/I5/66

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