化工学报 ›› 2019, Vol. 70 ›› Issue (1): 207-213.DOI: 10.11949/j.issn.0438-1157.20180918

• 能源和环境工程 • 上一篇    下一篇

rGO-Fe3O4活化过硫酸盐处理酸性红73

尹飞(),王翠,童少平()   

  1. 浙江工业大学化学工程学院,绿色化学合成技术国家重点实验室培育基地,浙江 杭州 310032
  • 收稿日期:2018-08-13 修回日期:2018-09-16 出版日期:2019-01-05 发布日期:2019-01-05
  • 通讯作者: 童少平
  • 作者简介:尹飞(1992—),男,硕士研究生,<email>1511950303@qq.com</email>|童少平(1971—),男,教授,<email>sptong@zjut.edu.cn</email>
  • 基金资助:
    国家自然科学基金项目(21176225)

Treatment of acid red 73 by persulfate in the presence of rGO-Fe3O4 composite

Fei YIN(),Cui WANG,Shaoping TONG()   

  1. College of Chemical Engineering, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China
  • Received:2018-08-13 Revised:2018-09-16 Online:2019-01-05 Published:2019-01-05
  • Contact: Shaoping TONG

摘要:

采用共沉淀法制备了还原石墨烯纳米片和磁铁矿复合材料(rGO-Fe3O4)。利用X射线衍射(XRD)、X射线光电子能谱(XPS)和透射电镜(TEM)对其进行了表征。以酸性红73(AR73)为目标物,研究了rGO-Fe3O4活化过硫酸盐(PS)处理酸性红73的效能,考察了催化剂投加量、PS浓度、溶液初始pH以及反应温度的影响。结果表明,室温下催化剂投加量为1.0 g/L、PS的浓度为1.0 g/L及初始pH为6.9时,10 min内50 mg/L酸性红73的脱色率达到100%。淬灭实验结果表明rGO-Fe3O4/PS反应体系同时存在SO4-?、?OH和单线态氧1O2,其中1O2的氧化反应起主导作用。复合材料rGO-Fe3O4不但活性高,而且便于分离,应用前景良好。

关键词: 还原石墨烯, 四氧化三铁, 高级氧化, 单线态氧, 过硫酸钠

Abstract:

A reduced graphene oxide nanosheet-iron oxide composite (rGO-Fe3O4) was synthesized by using coprecipitation method, and characterized by using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The rGO-Fe3O4 composite was used as heterogeneous catalyst to activate persulfate (PS) to decolor acid red 73 (AR73). The effects of catalyst dosage, PS concentration, initial pH value and reaction temperature on the decolorization efficiency were investigated. The results showed that 50 mg/L AR73 was totally removed in 10 min at room temperature when the concentrations of rGO-Fe3O4 and PS were both 1.0 g/L. Singlet oxygen was confirmed to be the primary reactive oxygen species by quenching experiment. This study shows that the rGO-Fe3O4 composite is a promising catalyst for activating PS to treat wastewater due to its high activity and easy separation.

Key words: reduced graphene, magnetite, advanced oxidation processes, singlet oxygen, persulfate

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