摘要
以多壁碳纳米管轴向切割得到的氧化石墨烯纳米带为基体,将二氧化锰负载其上,成功制备了氧化石墨烯纳米带/二氧化锰(GONRs/MnO2)复合材料,利用扫描电镜(SEM)、X-射线衍射分析(XRD)、傅里叶红外光谱(FT-IR)和比表面积(BET)对复合材料进行了表征,并且进一步研究了复合材料对U(Ⅵ)的吸附性能。结果表明:GONRs/MnO2对于U(VI)的吸附是一个与pH相关、快速、自发的吸热过程;吸附过程符合拟二级动力学模型和Langmuir模型,GONRs/MnO2对于U(VI)的吸附容量可高达345mg·g-1,解吸实验表明GONRs/MnO2可循环利用5次以上,有望对含铀溶液中的铀进行分离和回收。
Graphene oxide nanoribbons/manganese dioxide composites(GONRs/MnO2) were successfully prepared by grafting MnO2 onto graphene oxide nanoribbons(GONRs) unzipped from multi-walled carbon nanotubes. The composites were characterized by SEM,XRD,FT-IR and BET, and the adsorption properties of the composites for the removal of U(Ⅵ) were further studied. The results show that the adsorption process is a rapid pH-dependent spontaneous and endothermic process. It followed to the quasi-secondary kinetic model and the Langmuir model, and the maximum adsorption capacity was 345 mg·g-1. The composites can be regenerated using HCl solution and repeatedly used for five times with little loss of sorption capabilities. They are expected to be used for the separation and recovery of uranium from wastewater.
作者
胡学文
王云
吴鹏
袁定重
刘妍
刘峙嵘
HU Xue-wen;WANG Yun;WU Peng;YUAN Ding-zhong;LIU Yan;LIU Zhi-rong(Engineering Research Center of Nuclear Technology Application(East China Institute of Technology,Ministry of Education,Nanchang 330013,China;State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;School of Nuclear Science and Engineering,East China University of Technology,Nanchang 330013,China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2019年第6期1532-1540,共9页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金(21601033)
东华理工大学核资源与环境教育部重点实验室开放基金(NRE1509)
东华理工大学核技术应用教育部工程研究中心开放基金(HJSJYB2016-6)
关键词
石墨烯纳米带
二氧化锰
铀
吸附
graphene nanoribbons
manganese
U(Ⅵ)
adsorption
