Preparation and performance of self-cleaning synergistic visible light catalytic coatings based on N-CQDs/Bi2WO6 for NO degradation

IF 9.7 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Journal of Cleaner Production Pub Date : 2024-11-04 DOI:10.1016/j.jclepro.2024.144146

Wenshuo Zhang, Huiyun Xia, Minjie Yan, Lifang Song, Xu Li, Liying Cui, Yanhui Niu, Svetlana Obukhova, Igor Burmisrov

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引用次数: 0

Abstract

Due to the intensification of nitric oxide (NO) emissions caused by industrial development, visible light responsive photocatalysts have been selected and applied in building coatings as a new strategy. In this study, N-doped carbon quantum dots (N-CQDs)-Bi₂WO₆ (NBW) was prepared using an ethylene glycol-assisted solvothermal method. Various techniques, including XRD, FT-IR, SEM, were employed to analyze and characterize NBW. The photocatalytic performance and stability of NBW were evaluated, and the results showed that 52% of NO (Initial concentration: 600 ppb) were oxidized under visible light. NBW was dispersed in an ethyl acetate/polytetrafluoroethylene (PTFE)/polyvinylidene fluoride (PVDF) suspension and modified by 1H,1H,2H,2H-Perfluorodecyltriethoxysilane (PFDTES), to form an easy-to-spray coating referred to as CPFB. Due to the photocatalytic ability of NBW, CPFB oxidized 74% of NO under visible light and reduced the coloring of coating surfaces contaminated with methyl red. The superhydrophobicity of CPFB coating provided the foundation for its self-cleaning ability. In addition, CPFB exhibited hydrophobicity and photocatalytic performance even after tests such as photooxidation, water impact, and wear. Finally, the photocatalytic mechanism of CPFB self-cleaning coating was explored. The significance of CPFB lied in its ability to effectively combine self-cleaning, visible light-responsive photocatalysis, and durability in a single coating. This innovative approach may inspire the development of similar coatings for various applications.

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基于 N-CQDs/Bi2WO6 的自清洁协同可见光催化涂层的制备及其降解氮氧化物的性能

由于工业发展导致一氧化氮（NO）排放加剧，可见光响应型光催化剂作为一种新策略被选中并应用于建筑涂料中。本研究采用乙二醇辅助溶热法制备了 N 掺杂碳量子点（N-CQDs）-Bi2WO6（NBW）。利用 XRD、傅立叶变换红外光谱、扫描电镜等多种技术对 NBW 进行了分析和表征。评估了 NBW 的光催化性能和稳定性，结果表明在可见光下，52% 的 NO（初始浓度：600 ppb）被氧化。将 NBW 分散在乙酸乙酯/聚四氟乙烯（PTFE）/聚偏氟乙烯（PVDF）悬浮液中，并用 1H,1H,2H,2H-全氟癸基三乙氧基硅烷（PFDTES）进行改性，形成一种易于喷涂的涂层，称为 CPFB。由于 NBW 的光催化能力，CPFB 在可见光下氧化了 74% 的 NO，并降低了被甲基红污染的涂层表面的着色。CPFB 涂层的超疏水性为其自清洁能力奠定了基础。此外，即使在经过光氧化、水冲击和磨损等测试后，CPFB 仍具有疏水性和光催化性能。最后，还探讨了 CPFB 自清洁涂层的光催化机理。CPFB 的意义在于它能在单一涂层中有效地结合自清洁、可见光响应光催化和耐久性。这种创新方法可能会启发人们为各种应用开发类似的涂层。

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来源期刊

Journal of Cleaner Production 环境科学-工程：环境

CiteScore

20.40

自引率

9.00%

发文量

4720

审稿时长

111 days

期刊介绍： The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.