石墨烯复合材料耦合PMS去除金橙G研究  

Study on the Orange G Removal by Graphene Composite Material Coupling with PMS

作　　者：郝尚斌 陈家斌[1] 黄天寅[1] 肖雨涵 夏文君 张黎明[1] HAO Shangbin;CHEN Jiabin;HUANG Tianyin;XIAO Yuhan;XIA Wenjun;ZHANG Liming(School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009

出　　处：《水处理技术》2018年第5期27-32,37,共7页Technology of Water Treatment

基　　金：国家自然科学基金项目(51478283)

摘　　要：对Hummer法制备出的氧化石墨烯(GO)进行改性,得到掺氮石墨烯(N-rGO),将其作为活化剂,活化过一硫酸盐(PMS)降解偶氮染料金橙G(OG),对GO和N-rGO进行了表征。结果表明,发现改性后的石墨烯表面含氧官能团明显减少。N-rGO投加量为0.5g/L、n(PMS):n(OG)为1:20时,降解50min可使OG的脱色率达到96%,而不投加N-rGO相同时间内仅降解2%。初始pH对N-rGO/PMS体系降解OG有较大的影响,pH为7时效果为佳。紫外可见光谱中,OG于479nm和330nm处吸收峰减少,表明染料分子中的偶氮键和萘环结构断裂。N-rGO/PMS体系中染料得到一定程度的矿化。Graphene oxide（GO） which was synthesized via Hummers method was modified to obtain the Nitrogen-doped graphene（N-rGO）. N-rGO was used as activator to active peroxymonosulfate（PMS） and then to degrade azo dyes orange G（OG）. GO and N-rGO were characterized. The results showed that, the oxygen-containing functional group of graphene surface reduced obviously after modification. When N-rGO dosage was 1.0 g/L, n（PMS）：n（OG）was 1：20, OG decolourization rate could reach 96% after 50 min degradation, while it was only 2% without N-rGO. The initial p H showed a remarkable effect on OG degradation in N-rGO/PMS system, pH of 7 was the best condition. Finally, from the analysis of UV-Vis spectra of OG during the reaction,the peaks at 479 nm and 330 nm were found to be decreased, indicating that the azo bond and naphthaline nucleus of the dye molecules were destructed.The dye had a certain degree of mineralization in N-rGO/PMS system.

关 键 词：氧化石墨烯 掺氮石墨烯 活化剂 过一硫酸盐 金橙G 

分 类 号：X788[环境科学与工程—环境工程]