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Flower-Like bismuth hydroxide/nitrogen-doped carbon nanotube catalyst-FerrateVI System: Selective generation of BismuthV and rapid oxidation of organic pollutants

文献类型： 外文期刊

作者： Liu, Mingzhu 1 ; Li, Xiaoyu 1 ; Qi, Yumeng 1 ; Wu, Nannan 1 ; Wei, Zhongbo 1 ; Tang, Kai 4 ; Sharma, Virender K. 5 ; Qu, Ruijuan 1 ;

作者机构： 1.Nanjing Univ, Sch Environm, State Key Lab Water Pollut Control & Green Resourc, Nanjing 210023, Jiangsu, Peoples R China

2.Shandong Acad Agr Sci, Inst Agr Resources & Environm, Jinan 250100, Shandong, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Agroprod Safety & Nutr, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China

4.Tech Univ Denmark, Dept Environm & Resource Engn, DK-2800 Lyngby, Denmark

5.Univ Miami, Dept Chem Environm & Mat Engn, Coral Gables, FL 33146 USA

关键词： Bismuth hydroxide-nitrogen-doped carbon nanotube hybrid (BNC); Ferrate(VI); Benzophenone-4; Catalytic oxidation; Product identification

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2025 年 516 卷

页码：

收录情况： SCI

摘要： Bismuth hydroxide (Bi(OH)(3)) with N-doped carbon nanotube (BNC) was hybridized via coprecipitation method. This BNC catalyst was found to show the rod-like flower cluster and the thin-layered flower-like crystal structure. The filamentous structure of carbon nanotubes (CNTs) intertwines with the flower-like lamellar structure of Bi(OH)(3), resulting in an even distribution of Bi(OH)(3) within the CNTs matrix and enhanced contact area between the reactant and the catalyst due to the interplay of N-CNT. The catalyst showed a high catalytic activity of ferrate((VI)) (Fe(VI)), resulting in 90.4 % removal of benzophenone-4 (BP-4) under conditions of [BNC(2.5)] = 350 mg/L, [Fe(VI)](0):[BP-4](0) = 5:1 and pH = 8.0. Compared with single-Fe(VI) oxidation, the use of catalyst could improve the oxidation efficiency by 8 times and save 50 % of the cost. Seventeen intermediates were identified and 6 pathways including hydroxylation, aldehydeylation, desulfuration, bond breaking, carboxylation and polymerization were proposed. In the catalytic system, the degradation was more diverse, which might result from the enhanced electron conduction by N-CNT and increased oxidation capacity of BiO3- mediated by the Bi(III)-Bi(V)(V)-Bi(III)(III) cycle. The newly developed BNC provides a new strategy for Fe(VI) oxidation of emerging contaminants in water.

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