摘要
利用高锰酸钾/浓硫酸氧化法对多壁碳纳米管(MWCNTs)进行了轴向切割,制得含氧基团丰富的氧化石墨烯纳米带(GONRs),利用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射仪(XRD)和傅里叶变换红外光谱(FT-IR)对其表面形貌和结构进行了表征,并研究对钍的吸附性能,探讨了p H、吸附剂用量、接触时间、钍离子浓度和温度等因素对吸附的影响。结果表明,GONRs对Th(Ⅳ)的吸附过程是与p H相关的、快速、自发的吸热过程;吸附符合准二级动力学模型和Langmuir模型,GONRs对Th(Ⅳ)的吸附容量可达314.3 mg/g,GONRs有望用于放射性废水中钍的吸附。
Multi-walled carbon nanotubes(MWCNTs)were longitudinal unzipping to form graphene oxide nanoribbons(GONRs)with abundant oxygen-containing groups by KMnO 4 and H 2SO 4.GONRs were characterized by scan electron microscope(SEM),transmission electron microscope(TEM),X-ray diffraction(XRD)and Fourier transformed infrared spectroscopy(FT-IR).Sorption behaviors of Th(IV)on GONRs were investigated by varying pH,sorbent dosage,contact time,initial uranium concentration,and temperature.The results showed that thorium sorption on GONRs was pH-dependent,fast,endothermic,spontaneous and a pseudo-second order process.Higher temperature was beneficial to the Th(IV)sorption.Sorption process obeyed Langmuir isotherm,and the maximum sorption capacity of Th(IV)on GONRs was 314.3 mg/g.GONRs could have pratical application in thorium-containing aqueous media.
作者
王云
吴鹏
胡学文
袁定重
仝小兰
谢鹏
刘峙嵘
WANG Yun;WU Peng;HU Xue-wen;YUAN Ding-zhong;TONG Xiao-lan;XIE Peng;LIU Zhi-rong(State Key Laboratory Breeding Base of Nuclear Resources and Environment,East China University of Technology,Nanchang,JX 330013,China;Engineering Research Center of Nuclear Technology Application,Ministry of Education,East China University of Technology,Nanchang,JX 330013,China;School of Nuclear Science and Engineering,East China University of Technology,Nanchang,JX 330013,China)
出处
《东华理工大学学报（自然科学版）》
CAS
2018年第1期71-77,共7页
Journal of East China University of Technology(Natural Science)
基金
国家自然科学基金项目(21601033,21661003,21461001,11375043)
东华理工大学核资源与环境教育部重点实验室开放基金项目(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项目(HJSJYB2016-6)
江西省教育厅科技计划项目(GJJ150571)
关键词
石墨烯纳米带
吸附
钍
graphene oxide nanoribbons
sorption
thorium(IV)
