快速热加工和改进 Bi2O3-BaTiO3 异质结的光催化性能

IF 2.1 4区工程技术 Q3 CHEMISTRY, PHYSICAL

International Journal of Photoenergy Pub Date : 2024-03-20 DOI:10.1155/2024/3777201

Lina Bing, Wei Wu, Zhenjiang Shen

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引用次数: 0

摘要

通过快速热处理（RTP）直接合成了具有高光催化效率的Bi2O3-BaTiO3异质结。将 Bi2O3 和 BaTiO3 按比例混合，分别用 RTP 和传统热处理（CTP）方法处理。RTP 样品具有明显的 Bi2O3 衍射峰，而 CTP 样品则显示出纯正的 BaTiO3 四方包晶。RTP 样品中存在更多的小颗粒和分层。甲基溴溶液的光降解表明，RTP 可以提高光催化效率。其主要表现在以下几点：RTP 可以通过强化结合晶粒来消除晶界缺陷；RTP 可以将两种物质的溶液区域限制在一定范围内，以获得最佳的内置电场宽度；RTP 可以强化 BaTiO3 的四方相，加速离子移动。因此，RTP 可以通过改善构建异质结来实现更高的光催化效率。这项工作为改善异质结的性能提供了一条直接而有效的途径。

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Rapid Thermal Processing and Improved Photocatalysis of Bi2O3-BaTiO3 Heterojunction

Bi₂O₃-BaTiO₃ heterojunction with high photocatalysis efficiency was directly synthesized by rapid thermal processing (RTP). Bi₂O₃ and BaTiO₃ were mixed in ratio and treated by RTP and conventional thermal processing (CTP), respectively. RTP samples have obvious Bi₂O₃ diffraction peaks, while CTP samples show pure BaTiO₃ tetragonal perovskite. More small particles and layered existed in RTP samples. Photodegradation of MB solutions shows that RTP can promote photocatalytic efficiency. Its main lies in the following points: RTP can remove grain boundary defects by strengthening the bond grains; RTP can limit the solution region of the two substances to a certain range to get the best built-in electric field width; and RTP can strengthen the tetragonal BaTiO₃ phase to hasten ion movement. Therefore, RTP can achieve much higher photocatalytic efficiency by improving the build heterojunction. This work provides a direct and efficient route to get improvement and high performance of heterojunction.

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来源期刊

International Journal of Photoenergy 工程技术-光学

CiteScore

6.00

自引率

3.10%

发文量

128

审稿时长

3.6 months

期刊介绍： International Journal of Photoenergy is a peer-reviewed, open access journal that publishes original research articles as well as review articles in all areas of photoenergy. The journal consolidates research activities in photochemistry and solar energy utilization into a single and unique forum for discussing and sharing knowledge. The journal covers the following topics and applications: - Photocatalysis - Photostability and Toxicity of Drugs and UV-Photoprotection - Solar Energy - Artificial Light Harvesting Systems - Photomedicine - Photo Nanosystems - Nano Tools for Solar Energy and Photochemistry - Solar Chemistry - Photochromism - Organic Light-Emitting Diodes - PV Systems - Nano Structured Solar Cells