硫氮掺杂石墨烯负载纳米零价铁去除水中六价铬的研究  

Removal of Cr(Ⅵ)by sulphur-nitrogen dual-doped reduced graphene oxide supported nanoscale zero-valent iron

作　　者：叶逸菲 张永祥[1] 林钰辉 黄雪征 YE Yi-fei;ZHANG Yong-xiang;LIN Yu-hui;HUANG Xue-zheng(Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China;School of Architecture and Construction,Nanyang Institute of Technology,Nanyang 473004,China)

机构地区：[1]北京工业大学城市建设学部,北京100124 [2]南阳理工学院土木工程学院,河南南阳473004

出　　处：《应用化工》2022年第4期912-917,922,共7页Applied Chemical Industry

基　　金：国家重点研发计划项目(2016YFC0401404)。

摘　　要：为提高石墨烯负载纳米零价铁材料去除重金属Cr^(6+)效率,采用液相还原法制备出硫、氮双掺杂的石墨烯负载纳米零价铁材料,通过扫描电子显微镜、BET比表面测试法、X射线光电子能谱对SN-rGO-nZVI的结构和性能进行了表征,研究了不同影响因素对于水中Cr(Ⅵ)去除效率的影响。结果表明,室温下,当材料中氧化还原石墨烯与掺杂的硫脲的质量比为1∶20,溶液初始pH值为3.5,Cr(Ⅵ)的初始浓度为25 mg/L,投加0.5 g/L的复合材料时,水中的Cr(Ⅵ)在90 min内去除率可以达到99.5%,在此过程中还原作用占主要地位。To improve the removal efficiency of heavy pollutants by reduced graphene oxide supported nanoscale zero-valent iron,sulphur-nitrogen dual-doped reduced graphene oxide supported nanoscale zero-valent iron was synthesized by liquid phase reduction method.The structure and properties of SN-rGO-nZVI was characterized using scanning election microscopy,BET specific surface test and X-ray photoelectron spectroscopy.The removal efficiency of Cr(Ⅵ)from water in different conditions was studied.The results showed that at room temperature,when the mass ratio of the graphene oxide and the doped thiourea was 1∶20,the initial pH value was 3.5,the initial Cr(Ⅵ)concentration was 25 mg/L and the 1∶20 SN-rGO-nZVI addition amount was 0.5 g/L,99.5%of Cr(Ⅵ)could be removed from water within 90 min,in this process reduction plays an important role.

关 键 词：纳米零价铁 硫氮双掺杂 还原氧化石墨烯 六价铬 

分 类 号：TQ050.4[化学工程] TQ016.1