Supported g-C3N4/WO3 mixed layers for photocatalytic water remediation

IF 2.2 4区化学 Q2 Engineering

Chemical Papers Pub Date : 2024-10-01 DOI:10.1007/s11696-024-03706-w

Libor Brabec, Eliska Mikyskova, Olha Zin, Barbora Walderova, Radek Zouzelka, Jiri Rathousky, Marco Weers, Arne Schechterle, Michael Wark

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Abstract

g-C₃N₄ layers with good mechanical properties, including their cohesion and adhesion to stainless-steel supports, were prepared by the quantitative electrophoretic co-deposition of g-C₃N₄ and WO₃ nanocrystals. It was carried out in a mixture of organic solvents by applying a voltage of 750 V. The typical layer area density was 0.64 mg cm^–2. The photocatalytic degradation of 4-chlorophenol under blue-light irradiation showed that the performance of stable composite layers containing 25–50 wt.% of WO₃ was only slightly weaker than that of unstable pristine g-C₃N₄ ones. The high photocatalytic performance was due to g-C₃N₄, while WO₃ contributed to a good mechanical resistance of layers in stirred water. Finally, the composite layers exhibited a very high 4-chlorophenol mineralization of 75% in 24 h, even higher than the corresponding suspensions. Owing to their stability in water and performance, the developed layers are suitable for applications in environmental technologies.

Graphic Abstract

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用于光催化水处理的支撑 g-C3N4/WO3 混合层

通过 g-C3N4 和 WO3 纳米晶体的定量电泳共沉积，制备出了具有良好机械性能（包括内聚力和对不锈钢支架的附着力）的 g-C3N4 层。典型层面积密度为 0.64 mg cm-2。在蓝光照射下对 4-氯苯酚的光催化降解表明，含有 25-50 wt.% WO3 的稳定复合层的性能仅略低于不稳定的纯 g-C3N4 层。g-C3N4 具有较高的光催化性能，而 WO3 则使复合层在搅拌水中具有良好的机械阻力。最后，复合层在 24 小时内的 4-氯苯酚矿化度高达 75%，甚至高于相应的悬浮液。由于其在水中的稳定性和性能，所开发的层适用于环境技术应用。

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来源期刊

Chemical Papers Chemical Engineering-General Chemical Engineering

CiteScore

3.30

自引率

4.50%

发文量

590

期刊介绍： Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.