Page 210 - 《精细化工》2023年第12期
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第 40 卷第 12 期                            精   细   化   工                                 Vol.40, No.12
             2 023 年 12 月                            FINE CHEMICALS                                 Dec.  2023


              水处理技术与环境保护
                                     高活性 Cu-MnO 类氧化物
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                                          纳米酶降解罗丹明 B



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                       谢碧梅 ,郑燕宁 ,王迎波 ,孙建华 ,杨崎峰 ,廖丹葵
                 (1.  广西大学  化学化工学院  广西石化资源加工及工程强化技术重点实验室,广西  南宁  530004;2.  广
                 西博世科环保科技股份有限公司,广西  南宁  530007)
                 摘要:采用一步水热法制备了高活性铜掺杂二氧化锰(Cu-MnO 2 )类氧化物纳米酶(简称为类氧化物酶),
                 采用 XRD、SEM、EDS、N 2 吸附-脱附、XPS 对其进行了表征,探究了 Cu-MnO 2 催化降解罗丹明 B(RhB)
                 的效果。结果表明,铜掺杂后 Cu-MnO 2 产生了协同效应,增强了 Cu-MnO 2 的类氧化物酶催化活性,当溶
                 液 pH=3.0、RhB 初始质量浓度为 50 mg/L、Cu-MnO 2 -10%(10%为 CuCl 2 ·2H 2 O 物质的量占 KMnO 4 物质的
                 量的百分数)用量为 0.01 g 时,30  ℃下,30 min 内可完全降解 RhB,并且催化剂使用 5 次后 RhB 降解率
                 仍达 75%。此外,对环丙沙星、氧氟沙星、四环素和对苯二酚难降解的污染物的降解率分别为 88.86%、
                 90.47%、92.62%和 90.99%。Cu-MnO 2 类氧化物酶催化降解 RhB 的机理研究表明,富含氧空位的 Cu-MnO 2
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                 中存在丰富的空穴,有利于吸附和催化溶解氧生成大量的单线态氧( O 2 )和少量的超氧自由基( O                                  2    )等
                 活性氧物种,可用于快速降解有机污染物。
                 关键词:类氧化物酶;铜掺杂;MnO 2 ;降解;罗丹明 B;水处理技术
                 中图分类号:X7034;TQ426.97      文献标识码:A      文章编号:1003-5214 (2023) 12-2752-10


                             Rhodamine B degradation by highly active Cu-MnO 2

                                              oxidase-like nanoenzyme

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                  XIE Bimei , ZHENG Yanning , WANG Yingbo , SUN Jianhua , YANG Qifeng , LIAO Dankui
                 (1. Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of
                 Chemistry and  Chemical Engineering, Guangxi University, Nanning  530004,  Guangxi, China; 2. Guangxi Bossco
                 Environmental Protection Technology Co., Ltd., Nanning 530007, Guangxi, China)
                 Abstract: Highly active copper-doped manganese dioxide (Cu-MnO 2 ) oxidase-like nanozyme (abbreviated as
                 oxidase-like enzyme) was prepared by one-step hydrothermal method and characterized by XRD, SEM, EDS, N 2
                 adsorption-desorption and XPS. And its catalytic performance on Rhodamine B (RhB) degradation was further
                 investigated. The results showed that the improved catalytic activity of Cu-MnO 2  was attributed to the synergistic
                 effect of MnO 2  and doped copper. RhB could be fully degraded within 30 min at 30 ℃ under the conditions of
                 solution pH 3.0, initial RhB mass concentration 50 mg/L, and Cu-MnO 2 -10% (10% is the percentage of amount
                 of substance of CuCl 2 ·2H 2 O and KMnO 4 ) dosage 0.01 g, while the degradation rate of RhB was still maintained
                 75% even when the catalyst was recycled 5 times. In addition, the degradation rates of ciprofloxacin, ofloxacin,
                 tetracycline, and hydroquinone were 88.86%, 90.47%, 92.62% and 90.99%, respectively. The mechanism study
                 of RhB degradation  catalyzed by  Cu-MnO 2   oxidase-like enzyme revealed  that there  were abundant  holes in
                 oxygen vacancy rich Cu-MnO 2 , which was beneficial for adsorbing and catalyzing dissolved oxygen to produce a
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                 large amount of singlet oxygen ( O 2 ) and a small number of superoxide radicals (O ) and other reactive oxygen
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                 species for the rapid degradation of organic pollutants.

                 收稿日期:2023-02-15;  定用日期:2023-05-18; DOI: 10.13550/j.jxhg.20230103
                 基金项目:国家自然科学基金项目(52162004);广西石化资源加工及过程强化技术重点实验室主任项目(2020Z003);广西博世科环
                 保科技股份有限公司国家企业技术中心开放基金(GXU-BFY-2020-007)
                 作者简介:谢碧梅(1996—),女,硕士生,E-mail:2453616310@qq.com。联系人:廖丹葵(1967—),女,教授,E-mail:liaodk@gxu.edu.cn。
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