Solvothermal synthesis of Bi12TiO20/Bi4Ti3O12 heterostructure with highly efficient photodegradation of MO under UV irradiation

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Main Group Chemistry Pub Date : 2023-08-18 DOI:10.3233/mgc-230060

Saad Aarich, M. Saidi, N. Chouaibi, K. Ziat

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引用次数: 0

Abstract

The sillenite-structured bismuth titanate (Bi12TiO20) is thought to be a viable photocatalyst for environmental remediation. However, the performance of Bi12TiO20 as a photocatalyst is severely constrained by its limited range of light sensitivity and the rapid photoinduced electron-hole pair recombination. A practical and effective way to overcome these limitations is to combine Bi12TiO20 with adequate photocatalysts to create heterojunctions. Here, a one-step solvothermal technique is used to synthesize Bi12TiO20/Bi4Ti3O12 heterojunction (BTO). The electric field that exists between B12TiO20, Bi4Ti3O12 and the closed interfacial contacts had a synergistic effect on the constructed composites, which resulted in high charge transfer abilities. Therefore, the BTO heterojunction demonstrated increased photocatalytic efficacy in the presence of ultraviolet irradiation. The MO removal efficiency of optimal BTO was 97.15%, significantly higher than that of pure Bi2O3 (46.9%). Furthermore, the cycling experiment demonstrated that the BTO heterojunction is stable and reusable. The probable mechanism of photocatalytic MO oxidation over BTO heterojunction was studied by various scavengers. The •OH radicals and holes played essential roles in BTO system of photocatalytic oxidation process.

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紫外辐射下高效光降解MO的Bi12TiO20/Bi4Ti3O12异质结构溶剂热合成

硅沸石结构的钛酸铋(Bi12TiO20)被认为是一种可行的环境修复光催化剂。然而，Bi12TiO20作为光催化剂的性能受到其有限的光敏范围和快速的光致电子-空穴对复合的严重限制。克服这些限制的一种实用而有效的方法是将Bi12TiO20与足够的光催化剂结合以产生异质结。本研究采用一步溶剂热法合成Bi12TiO20/Bi4Ti3O12异质结(BTO)。B12TiO20和Bi4Ti3O12之间存在的电场与封闭的界面接触对构建的复合材料具有协同作用，从而获得了较高的电荷转移能力。因此，BTO异质结在紫外线照射下表现出更高的光催化效率。最佳BTO对MO的去除率为97.15%，显著高于纯Bi2O3的46.9%。此外，循环实验证明了BTO异质结的稳定性和可重复使用性。研究了不同清除剂在BTO异质结上光催化氧化MO的可能机理。•OH自由基和空穴在BTO体系光催化氧化过程中起着至关重要的作用。

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

Main Group Chemistry 化学-化学综合

CiteScore

2.00

自引率

26.70%

发文量

审稿时长

>12 weeks

期刊介绍： Main Group Chemistry is intended to be a primary resource for all chemistry, engineering, biological, and materials researchers in both academia and in industry with an interest in the elements from the groups 1, 2, 12–18, lanthanides and actinides. The journal is committed to maintaining a high standard for its publications. This will be ensured by a rigorous peer-review process with most articles being reviewed by at least one editorial board member. Additionally, all manuscripts will be proofread and corrected by a dedicated copy editor located at the University of Kentucky.