Fabrication and Assessment of Co-TiO2/Ag3PO4 Z-Scheme Photocatalyst for Improved Methylene Blue Degradation

IF 0.6 4区 化学 Q4 CHEMISTRY, APPLIED Russian Journal of Applied Chemistry Pub Date : 2024-08-20 DOI:10.1134/S1070427224020150
Mingxia Tian, Xindong Wang, Yumin Yan, Yuan Zhang, Guyu Zhang, Tianyi Cui, Jianbo Zhao, Jianhui Jiang
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Abstract

Water resources are crucial for human life. However, current water resource treatment methods have limitations. In this regard, photocatalysis is a promising water resource treatment technology with a simple operation, green environmental protection, and high economic benefits. Therefore, this study prepared a Co-TiO2/Ag3PO4 (CTAP) photocatalyst for the treatment of water resources. Here, a Co-TiO2/Ag3PO4 photocatalyst was prepared using a hydrothermal method combined with calcination. Under visible light irradiation, the methylene blue (MB) degradation degree of CTAP composite reached 96.4% within 14 min, and the degradation rate constant was 0.23516 min–1. These reaction rates are 137 and 3.4 times higher than those of pure TiO2 and Ag3PO4 samples, respectively. Thus, doping and heterojunctions significantly improved the photocatalytic performance of CTAP composites, primarily due to grain size reduction of TiO2 after Co2+ doping. The formation of a close interfacial connection with Ag3PO4 increased the active site of the reaction and promoted the transfer of photogenerated charges, thus improving the photocatalytic performance of CTAP composites. According to the photocatalytic capture experiments of the active species, e-, h+, O2–, and OH play a common role in the degradation of MB. This paper provides insights into the design and preparation of a Z-scheme photocatalyst that can be considered for the degradation of pollutants in water.

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制备和评估用于改进亚甲基蓝降解的 Co-TiO2/Ag3PO4 Z 型光催化剂
摘要 水资源对人类生活至关重要。然而,目前的水资源处理方法存在局限性。为此,光催化技术是一种操作简单、绿色环保、经济效益高、前景广阔的水资源处理技术。因此,本研究制备了一种用于水资源处理的 Co-TiO2/Ag3PO4 (CTAP)光催化剂。本研究采用水热法结合煅烧法制备了 Co-TiO2/Ag3PO4 光催化剂。在可见光照射下,14 分钟内 CTAP 复合材料的亚甲基蓝(MB)降解率达到 96.4%,降解速率常数为 0.23516 min-1。这些反应速率分别是纯 TiO2 和 Ag3PO4 样品的 137 倍和 3.4 倍。因此,掺杂和异质结显著提高了 CTAP 复合材料的光催化性能,这主要是由于 Co2+ 掺杂后 TiO2 的晶粒尺寸减小。与 Ag3PO4 形成紧密的界面连接,增加了反应的活性位点,促进了光生电荷的转移,从而提高了 CTAP 复合材料的光催化性能。根据活性物种的光催化捕获实验,e-、h+、-O2- 和 -OH 在降解 MB 的过程中发挥了共同的作用。本文为 Z 型光催化剂的设计和制备提供了启示,该催化剂可用于降解水中的污染物。
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来源期刊
CiteScore
1.60
自引率
11.10%
发文量
63
审稿时长
2-4 weeks
期刊介绍: Russian Journal of Applied Chemistry (Zhurnal prikladnoi khimii) was founded in 1928. It covers all application problems of modern chemistry, including the structure of inorganic and organic compounds, kinetics and mechanisms of chemical reactions, problems of chemical processes and apparatus, borderline problems of chemistry, and applied research.
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