石墨烯泡沫包裹铁电极的制备及其在电解脱色染料中的应用研究

发布时间：2018-04-09 12:21

本文选题：石墨烯泡沫　切入点：电解　出处：《环境污染与防治》2016年12期

【摘要】：通过水热还原氧化石墨烯在铁电极表面原位生长石墨烯泡沫的方法制得了石墨烯泡沫包裹铁电极(GS-Fe电极),并将其应用于多种染料的电解脱色。结果表明:在相同电流密度下,GS-Fe电极的电解反应速率常数是铁电极的5倍;加入电解质对电解效率至关重要,其中NaCl是最有效的电解质;对甲烯蓝而言,最佳的电解条件为甲烯蓝初始质量浓度30mg/L、pH 5~7;GS-Fe电极可用于电解脱色刚果红、酸性蓝92和活性蓝R。电解脱色的机制推测主要为间接氧化,Cl~-被氧化成ClO~-,而后ClO~-氧化染料。GS-Fe电极可通过简单清洗再生,电解的脱色率几乎不受影响。
[Abstract]:GS-Fe electrode coated with graphene foam was prepared by in-situ growth of graphene foam on the surface of iron electrode by hydrothermal reduction oxidation of graphene, and applied to electrolytic decolorization of various dyes.The results show that at the same current density, the electrolysis reaction rate constant of GS-Fe electrode is 5 times that of iron electrode, the addition of electrolyte is very important to the electrolysis efficiency, NaCl is the most effective electrolyte, and for methylene blue, the electrolysis rate constant is 5 times higher than that of iron electrode.The optimum electrolysis conditions are as follows: the initial mass concentration of methylene blue is 30 mg 路L ~ (-1) (pH = 5 ~ (7)) GS-Fe electrode, which can be used for electrolytic decolorization of Congo red, acid blue 92 and active blue R _ (2).The mechanism of electrolytic decolorization is indirectionally oxidized to ClO-, and then the CLO- oxidation dye. GS-Fe electrode can be simply cleaned and regenerated, and the decolorization rate of electrolysis is almost unaffected.
【作者单位】：山东省科学院山东省分析测试中心;西南民族大学化学与环境保护工程学院;
【基金】：国家自然科学基金青年科学基金资助项目(No.21307101) 国家“万人计划”青年拔尖人才支持计划项目山东省优秀中青年科学家科研奖励基金资助项目(No.BS2011SW031) 西南民族大学功能高分子创新团队项目(No.14CXTD04)
【分类号】：O646.5;X703

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