Microstructure and Photocatalytic Performance of BaTi₅O₁₁ Nanocrystals Synthesized via Sol-Gel Method Mediated by Organic Solvents.

IF 5.3 3区化学 Q1 POLYMER SCIENCE

Gels Pub Date : 2025-09-03 DOI:10.3390/gels11090706

Honghua Wang, Tianchen Gao, Xinyi Li, Yuci Huang, Junjie Wang, Zhixiong Huang, Dongyun Guo

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Abstract

BaTi₅O₁₁ nanocrystals were synthesized via a sol-gel method employing different organic solvents. The influence of solvent choice on microstructure and photocatalytic performance was investigated through methylene blue (MB) degradation under UV light irradiation. The monoclinic BaTi₅O₁₁ nanocrystals were successfully synthesized, where solvent selection significantly affected their grain size and Brunauer-Emmett-Teller (BET) surface area. The BaTi₅O₁₁ nanocrystals synthesized using polyethylene glycol-200 (PEG-200) exhibited the highest BET surface area (9.78 m²/g) and smallest average pore size (17.8 nm). The BaTi₅O₁₁ nanocrystals also displayed a larger optical bandgap (3.61 eV), attributed to pronounced quantum confinement and surface effects. Consequently, the PEG-200-derived BaTi₅O₁₁ photocatalyst achieved complete MB degradation within 30 min under UV light irradiation. This enhanced performance was attributed to the high BET surface area providing abundant active sites. Furthermore, the BaTi₅O₁₁ nanocrystal photocatalyst maintained excellent reusability and stability over four consecutive cycles.

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有机溶剂介导溶胶-凝胶法制备BaTi5O11纳米晶的微观结构及光催化性能

采用溶胶-凝胶法制备了不同有机溶剂的BaTi5O11纳米晶体。通过紫外光照射降解亚甲基蓝，研究了溶剂选择对亚甲基蓝微观结构和光催化性能的影响。成功地合成了单斜晶BaTi5O11纳米晶，其中溶剂的选择对其晶粒尺寸和比表面积有显著影响。聚乙二醇-200 （PEG-200）合成的BaTi5O11纳米晶体具有最高的BET表面积（9.78 m2/g）和最小的平均孔径（17.8 nm）。由于明显的量子约束和表面效应，BaTi5O11纳米晶体还显示出更大的光学带隙（3.61 eV）。因此，在紫外光照射下，peg -200衍生的BaTi5O11光催化剂在30分钟内完全降解了MB。这种增强的性能归因于高BET表面积提供了丰富的活性位点。此外，BaTi5O11纳米晶光催化剂在连续四个循环中保持了良好的可重复使用性和稳定性。

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来源期刊

Gels POLYMER SCIENCE-

CiteScore

4.70

自引率

19.60%

发文量

707

审稿时长

11 weeks

期刊介绍： The journal Gels (ISSN 2310-2861) is an international, open access journal on physical (supramolecular) and chemical gel-based materials. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the maximum length of the papers, and full experimental details must be provided so that the results can be reproduced. Short communications, full research papers and review papers are accepted formats for the preparation of the manuscripts. Gels aims to serve as a reference journal with a focus on gel materials for researchers working in both academia and industry. Therefore, papers demonstrating practical applications of these materials are particularly welcome. Occasionally, invited contributions (i.e., original research and review articles) on emerging issues and high-tech applications of gels are published as special issues.