Photocatalytic WO3/Amorphous Carbon Dots Composite Coatings Immobilized by Ultrasonic Spray on Glass Substrate

IF 2.6 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Electronic Materials Letters Pub Date : 2025-12-17 DOI:10.1007/s13391-025-00616-1

V. Raja Preethi, Sagarika Sahoo, Ryun Kyung Lee, Kee-Sun Lee

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引用次数: 0

Abstract

Photocatalytic WO₃ materials with visible light responsiveness have attracted interest in eco-friendly wastewater treatment, antimicrobial applications, and indoor air purification. In this study, WO₃/amorphous carbon dot composite coatings were produced on glass substrates using an ultrasonic spray deposition followed by heat treatment, enabling scalable and cost-effective large-area immobilized product. The precursor suspension combined hydrothermally synthesized WO₃ nano cubes with citric acid (CA), which served as a carbon source. Drying and heat treatment induced carbonization of CA, resulting in a crack-free, adherent composite thin coatings comprising WO₃ nano cubes interconnected by localized amorphous carbon dots (aCDs), as confirmed by Raman, FTIR, and HRTEM analyses. The carbonaceous bridges enhanced interparticle connectivity and coating adhesion to the substrate. Photocatalytic degradation of methylene blue under visible light (Xenon lamp) achieved 95% reduction in 200 min in basic pH. Photoluminescence spectroscopy confirmed synergistic interaction between WO_3, and carbon dots promotes charge separation improving photocatalytic efficiency. Since the catalysts are stuck on the glass substrate surface compactly, the reusability becomes easier. This immobilized WO₃/Carbon composite coating demonstrates promising potential for environmentally sustainable photocatalytic applications.

Graphical Abstract

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超声喷涂固定玻璃基板光催化WO3/非晶碳点复合涂层

具有可见光响应性的光催化WO3材料在生态友好型废水处理、抗菌应用和室内空气净化方面引起了人们的兴趣。在本研究中，采用超声喷涂沉积和热处理的方法在玻璃基板上制备了WO3/非晶碳点复合涂层，实现了可扩展和经济高效的大面积固定化产品。前驱体悬浮液将水热合成的WO3纳米立方体与柠檬酸（CA）结合，柠檬酸作为碳源。通过拉曼光谱、红外光谱和HRTEM分析证实，干燥和热处理导致CA碳化，形成无裂纹的、粘附的复合薄涂层，其中包括由局部无定形碳点（aCDs）连接的WO3纳米立方体。碳质桥增强了颗粒间的连通性和涂层与基体的附着力。在可见光（氙灯）下光催化降解亚甲基蓝，在200 min内碱性ph降低95%。光致发光光谱证实WO3与碳点之间存在协同作用，促进电荷分离，提高光催化效率。由于催化剂紧贴在玻璃基板表面，使其易于重复使用。这种固定化WO3/碳复合涂层在环境可持续的光催化应用中具有广阔的潜力。图形抽象

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

期刊介绍： Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.