MnFe2O4-还原氧化石墨烯活化过硫酸氢钾降解罗丹明B

doi:10.3969/j.issn.2095-2198.2022.06.007

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通过制备MnFe₂O₄-还原氧化石墨烯（RGO）复合活性剂，活化过硫酸氢钾降解罗丹明B（RhB）考察了pH、温度、过硫酸氢钾浓度、MnFe₂O₄-RGO投加量等要素对降解效率的影响规律.结果表明：RGO掺杂质量分数为7%的MnFe₂O₄-RGO催化剂在25 ℃、pH=7、n（RhB）∶n（KHSO₅）=1∶15、MnFe₂O₄-RGO的投加量为0.25 g/L的条件下对RhB的降解率达95%，降解反应活化能为30.39 kJ/mol.MnFe₂O₄--RGO降解效果远高于单独MnFe₂O₄，这是由于RGO促进了MnFe₂O₄的分散，并为降解RhB提供了更多的反应活性位点MnFe₂O₄-RGO重复使用5次后对RhB的降解率仍能保持在90%以上.

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关键词: MnFe₂O₄-RGO')" href="#">

MnFe₂O₄-RGO 过硫酸氢钾硫酸根自由基罗丹明B

Abstract:

Rhodamine B (RhB) was degraded by activating potassium bisulfate by preparing MnFe₂O₄- reducing graphene oxide (RGO) composite activator.The effect of pH,temperature,potassium peroxymonosulfate content and MnFe₂O₄--RGO dosage on the degradation efficiency was investigated by preparing MnFe₂O₄--reduced graphene oxide (RGO) composite surfactant and activating potassium persulfate to degrade rhodin B (RhB).The results showed that the optimal reaction conditions of MnFe₂O₄-RGO catalyst with RGO doping mass fraction of 7% were as follows: when pH=7,temperature 25 ℃,n(RhB)∶n(KHSO₅)=1∶15,the decolorization rate of RhB solution reached 95% and the activation energy of the degradation reaction was 30.39 kJ/mol.The degradation effect of MnFe₂O₄-RGO was much higher than that of MnFe₂O₄ alone,probably because RGO promoted the dispersion of MnFe₂O₄and provided more reactive sites for RhB.The degradation rate of RhB by MnFe₂O₄-RGO still be maintained above 90% after 5 times of repeated use.

Key words: MnFe₂O₄-RGO')" href="#">

MnFe₂O₄-RGO Potassium peroxymonosulfate sulfate radical Rhodamine B

出版日期: 2022-12-31 发布日期: 2024-06-06 整期出版日期: 2022-12-31

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王欣, 姚变, 程浩, 乔旭, 吴丹.

MnFe₂O₄-还原氧化石墨烯活化过硫酸氢钾降解罗丹明B [J]. 沈阳化工大学学报, 2022, 36(6): 513-518.
WANG Xin, YAO Bian, CHENG Hao, QIAO Xu, WU Dan.

Activation of Peroxymonosulfate by MnFe₂O₄-Reduced Graphene Oxide for Rhodamine B Degradation . Journal of Shenyang University of Chemical Technology, 2022, 36(6): 513-518.

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https://xuebao.syuct.edu.cn/CN/10.3969/j.issn.2095-2198.2022.06.007 或 https://xuebao.syuct.edu.cn/CN/Y2022/V36/I6/513

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