TiO2/C/Cu hybrids by in-situ carbon reduction for a green photocatalytic agent

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability Pub Date : 2024-10-28 DOI:10.1016/j.mtsust.2024.101033

Guilu Qin , Yifan Liu , Ruhumuriza Jonathan , Baoshan Wu , Xian Jian

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引用次数: 0

Abstract

TiO₂ semiconductor has the disadvantages of energy bandwidth, low photo-quantum efficiency, and electron-hole pair easy recombination, which makes TiO₂ semiconductor photocatalytic materials cannot be widely used efficiently. Here, a simple and low-cost method is used to prepare TiO₂/C/Cu hybrid by in-situ carbon reduction by chemical vapor deposition. During high-temperature calcination, an amorphous carbon is formed on the surface of anatase TiO₂, and CuO is reduced by in-situ carbon to obtain Cu. Partial Cu-doping into TiO₂ introduces defects, and in-situ Cu and C loads act as electron traps to reduce photogenerated electron/hole recombination. Compared with the original TiO₂, the TiO₂/C/Cu hybrids have a narrow band gap (2.77 eV) and abundant defect active sites and have excellent photocatalytic activity to improve the degradation of formaldehyde (HCHO) and methyl orange (MO) under visible light. In addition, after 4 cycles, the degradation of HCHO and MO still maintained excellent stability. This innovation has many potential applications in the future, including air purification and industry.

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通过原位碳还原法将 TiO2/C/Cu 混合物转化为绿色光催化剂

TiO2半导体具有能带宽、光量子效率低、电子-空穴对易重组等缺点，这使得TiO2半导体光催化材料不能得到有效的广泛应用。本文采用一种简单、低成本的方法，通过化学气相沉积原位碳还原法制备了TiO2/C/Cu杂化物。在高温煅烧过程中，锐钛型二氧化钛表面形成无定形碳，原位碳还原 CuO 得到 Cu。在二氧化钛中掺入部分铜会带来缺陷，而原位铜和碳负载则会成为电子陷阱，从而减少光生电子/空穴重组。与原始 TiO2 相比，TiO2/C/Cu 杂化物具有较窄的带隙（2.77 eV）和丰富的缺陷活性位点，具有优异的光催化活性，可改善可见光下甲醛（HCHO）和甲基橙（MO）的降解。此外，经过 4 次循环后，HCHO 和 MO 的降解仍然保持极佳的稳定性。这项创新在未来的空气净化和工业等领域有许多潜在的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Today Sustainability Multiple-

CiteScore

5.80

自引率

6.40%

发文量

174

审稿时长

32 days

期刊介绍： Materials Today Sustainability is a multi-disciplinary journal covering all aspects of sustainability through materials science. With a rapidly increasing population with growing demands, materials science has emerged as a critical discipline toward protecting of the environment and ensuring the long term survival of future generations.