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利用功能化聚合型碳氮化物进行光催化空气净化。

Photocatalytic Air Purification Using Functional Polymeric Carbon Nitrides.

机构信息

Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, New Territories, Hong Kong, P. R. China.

Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.

出版信息

Adv Sci (Weinh). 2021 Dec;8(24):e2102376. doi: 10.1002/advs.202102376. Epub 2021 Oct 24.

DOI:10.1002/advs.202102376
PMID:34693667
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8693081/
Abstract

The techniques for the production of the environment have received attention because of the increasing air pollution, which results in a negative impact on the living environment of mankind. Over the decades, burgeoning interest in polymeric carbon nitride (PCN) based photocatalysts for heterogeneous catalysis of air pollutants has been witnessed, which is improved by harvesting visible light, layered/defective structures, functional groups, suitable/adjustable band positions, and existing Lewis basic sites. PCN-based photocatalytic air purification can reduce the negative impacts of the emission of air pollutants and convert the undesirable and harmful materials into value-added or nontoxic, or low-toxic chemicals. However, based on previous reports, the systematic summary and analysis of PCN-based photocatalysts in the catalytic elimination of air pollutants have not been reported. The research progress of functional PCN-based composite materials as photocatalysts for the removal of air pollutants is reviewed here. The working mechanisms of each enhancement modification are elucidated and discussed on structures (nanostructure, molecular structue, and composite) regarding their effects on light-absorption/utilization, reactant adsorption, intermediate/product desorption, charge kinetics, and reactive oxygen species production. Perspectives related to further challenges and directions as well as design strategies of PCN-based photocatalysts in the heterogeneous catalysis of air pollutants are also provided.

摘要

由于空气污染日益严重，对人类生活环境造成负面影响，因此环境产生技术受到了关注。几十年来，人们对基于聚合碳氮化物（PCN）的光催化剂在空气污染物多相催化方面的兴趣日益浓厚，通过可见光的收集、层状/缺陷结构、官能团、合适/可调带位置和现有的路易斯碱性位点，这种兴趣得到了提高。基于 PCN 的光催化空气净化可以减少空气污染物排放的负面影响，并将不良和有害的材料转化为增值或无毒、或低毒的化学品。然而，根据以前的报告，尚未对基于 PCN 的光催化剂在催化消除空气污染物方面进行系统的总结和分析。本文综述了功能化 PCN 基复合材料作为光催化剂去除空气污染物的研究进展。阐述和讨论了每种增强改性的工作机制，涉及结构（纳米结构、分子结构和复合材料）对光吸收/利用、反应物吸附、中间产物/产物解吸、电荷动力学和活性氧物质生成的影响。还提供了与进一步挑战和方向以及在空气污染物多相催化中设计 PCN 基光催化剂的策略相关的观点。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6789/8693081/c5d2cfce6c34/ADVS-8-2102376-g011.jpg
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