通过添加剥离的 g-C3N4 增强基于 TiO2 涂层的可见光光催化活性

IF 4.3 3区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Ilias Papailias, N. Todorova, T. Giannakopoulou, Niki Plakantonaki, Michail Vagenas, Panagiotis Dallas, G. Anyfantis, Ioannis Arabatzis, C. Trapalis
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引用次数: 0

摘要

最近几年,研究人员和公司对开发用于空气净化和自清洁的光催化涂层表现出越来越大的兴趣。为了保持尽可能低的光催化剂浓度,需要高活性材料和/或它们的组合。在这项工作中,制备了含有 g-C3N4/TiO2 复合材料的新型光催化配方,并以涂层的形式沉积在 a 块基底上。对所获得的光催化表面进行了从模型空气中去除氮氧化物和乙醛的测试。结果发现,与纯二氧化钛涂层相比,在可见光照射下,仅添加 0.5 wt% g-C3N4 的二氧化钛含量就能使光催化活性提高 50%以上,而紫外线照射下的活性则不受影响。这一结果与 g-C3N4/TiO2 异质结的形成有关,该异质结改善了光吸收和光生电子-空穴对的分离,同时由于 g-C3N4 薄片的存在抑制了 TiO2 颗粒的团聚。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhancing the Visible Light Photocatalytic Activity of TiO2-Based Coatings by the Addition of Exfoliated g-C3N4
In the last few years, increasing interest from researchers and companies has been shown in the development of photocatalytic coatings for air purification and self-cleaning applications. In order to maintain the photocatalyst’s concentration as low as possible, highly active materials and/or combinations of them are required. In this work, novel photocatalytic formulations containing g-C3N4/TiO2 composites were prepared and deposited in the form of coatings on a-block substrates. The obtained photocatalytic surfaces were tested for NOx and acetaldehyde removal from model air. It was found that the addition of only 0.5 wt% g-C3N4 towards TiO2 content results in over 50% increase in the photocatalytic activity under visible light irradiation in comparison to pure TiO2 coating, while the activity under UV light was not affected. The result was related to the creation of a g-C3N4/TiO2 heterojunction that improves the light absorption and the separation of photogenerated electron-hole pairs, as well as to the inhibition of TiO2 particles’ agglomeration due to the presence of g-C3N4 sheets.
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来源期刊
CiteScore
7.20
自引率
4.30%
发文量
567
期刊介绍: ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/​Abstracted: Web of Science SCIE Scopus CAS INSPEC Portico
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