Derivatives of two-dimensional MXene-MOFs heterostructure for boosting peroxymonosulfate activation: Enhanced performance and synergistic mechanism

IF 21.1 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2023-04-01 DOI:10.1016/j.apcatb.2022.122136

Xin Guo, Hao Zhang, Yiyuan Yao, Chengming Xiao, Xin Yan, Ke Chen, Junwen Qi, Yujun Zhou, Zhigao Zhu, Xiuyun Sun, Jiansheng Li

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引用次数: 23

Abstract

Integrating the merits of the substrate and active sites with the water matrix is of significant importance to design novel catalysts for peroxymonosulfate (PMS)-based advanced oxidation processes. A sandwich-like heterostructure catalyst (MCoO@Co-N-C) were fabricated via anchoring zero-dimensional metal-organic frameworks (MOFs)-derived CoO nanoparticles on two-dimensional Ti₃C₂T_x MXene nanosheets. Benefiting from the distinctive structure, the resultant catalysts achieved excellent decontamination performance under high salinity conditions (200 mM). Nearly 100% efficiency of bisphenol A (BPA) was degraded within 10 min only using 0.05 g L⁻¹ catalyst and 0.1 g L⁻¹ PMS, with exceptional high turnover frequency (TOF) value (8.64 min⁻¹) which was 22.5 times higher than that of MOFs derived catalysts without MXene. A mediated-electron transfer mechanism is found to be conducive to the oxidation of BPA. This work provides a new approach to novel catalysts designed for removing trace organic contaminants (TrOCs) in saline water.

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二维MXene-MOFs异质结构衍生物促进过氧单硫酸盐活化:增强性能和协同机制

将底物和活性位点的优点与水基质相结合，对设计基于过氧单硫酸根(PMS)的高级氧化工艺的新型催化剂具有重要意义。通过在二维Ti3C2Tx MXene纳米片上锚定零维金属有机骨架(MOFs)衍生的CoO纳米颗粒，制备了三明治状异质结构催化剂(MCoO@Co-N-C)。得益于独特的结构，合成的催化剂在高盐度条件下(200 mM)具有优异的去污性能。使用0.05 g L−1催化剂和0.1 g L−1 PMS时，双酚A (BPA)的降解效率在10 min内接近100%，TOF值高达8.64 min−1，是不使用MXene的mof衍生催化剂的22.5倍。发现一种介导的电子传递机制有利于双酚A的氧化。本研究为设计新型催化剂去除咸水中痕量有机污染物(TrOCs)提供了新的途径。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.