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Volume 13
Issue 6
10.3390/pr13061654
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Preparation of Strontium Hydroxystannate by a Hydrothermal Method and Its Photocatalytic Performance

by
Qiao Liang
1,
Junke Li
2,
Rui Pan
2,
Xianxu Yang
2,
Yufeng Zeng
2,
Chao Shi
2,
Hao Bao
2,
Peng Li
3,
Min Fu
4,* and
Shichao Tian
5,*
1
Chongqing Jiangbeizui Property Service Co., Ltd., Chongqing 400000, China
2
Chongqing Solid Waste Treatment Co., Ltd., Chongqing 401120, China
3
Chongqing Liangping District Enterprise Development Service Center, Chongqing 405299, China
4
Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China
5
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, NO. 15, N. 3rd Ring Rd East, Beijing 100029, China
*
Authors to whom correspondence should be addressed.
Processes 2025, 13(6), 1654; https://doi.org/10.3390/pr13061654 (registering DOI)
Submission received: 12 April 2025 / Revised: 14 May 2025 / Accepted: 20 May 2025 / Published: 24 May 2025
(This article belongs to the Special Issue Metal Oxides in Heterogeneous Oxidation Catalysis)
Versions Notes

Abstract

To address the challenge of abatement of volatile organic compounds (VOCs) in environmental catalysis, this study developed a temperature-gradient hydrothermal strategy to fabricate SrSn(OH)6 nanocatalysts and systematically investigatd their photocatalytic performance and mechanisms for gaseous toluene degradation. SrSn(OH)6 (SSH) was synthesized via a simple hydrothermal method with optimal preparation conditions identified as a reaction temperature of 140 °C and duration of 12 h. The crystallinity of SrSn(OH)6 was modulated by adjusting the pH of the precursor solution, yielding materials with distinct morphologies, specific surface areas, and band gaps. The narrowed band gap of SrSn(OH)6 nanocatalysts facilitated electron excitation to generate additional photogenerated electron-hole pairs. The SSH-10.5 sample with ordered planar and hole-like structures promoted carrier migration, effectively suppressed electron-hole recombination, and enhanced the conversion of abundant surface hydroxyl groups into hydroxyl radicals. Under UV irradiation, SSH-10.5 achieved a toluene degradation efficiency of 69.56% and showed excellent stability after five reuse cycles. Electron spin resonance analysis confirmed the presence of •OH and •O2− radicals in the reaction system, with •OH identified as the dominant active species. In situ FT-IR spectroscopy revealed that •OH and •O2− radicals attacked the methyl group of toluene, converting it into intermediates including benzyl alcohol, benzaldehyde, and benzoic acid. This work provides a novel design of high-efficiency VOC-photocatalytic materials and shows significant implications for advancing industrial exhaust gas purification technologies.
Keywords: SrSn(OH)6 nanocatalysts; hydrothermal strategy; volatile organic compounds; active species SrSn(OH)6 nanocatalysts; hydrothermal strategy; volatile organic compounds; active species

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MDPI and ACS Style

Liang, Q.; Li, J.; Pan, R.; Yang, X.; Zeng, Y.; Shi, C.; Bao, H.; Li, P.; Fu, M.; Tian, S. Preparation of Strontium Hydroxystannate by a Hydrothermal Method and Its Photocatalytic Performance. Processes 2025, 13, 1654. https://doi.org/10.3390/pr13061654

AMA Style

Liang Q, Li J, Pan R, Yang X, Zeng Y, Shi C, Bao H, Li P, Fu M, Tian S. Preparation of Strontium Hydroxystannate by a Hydrothermal Method and Its Photocatalytic Performance. Processes. 2025; 13(6):1654. https://doi.org/10.3390/pr13061654

Chicago/Turabian Style

Liang, Qiao, Junke Li, Rui Pan, Xianxu Yang, Yufeng Zeng, Chao Shi, Hao Bao, Peng Li, Min Fu, and Shichao Tian. 2025. "Preparation of Strontium Hydroxystannate by a Hydrothermal Method and Its Photocatalytic Performance" Processes 13, no. 6: 1654. https://doi.org/10.3390/pr13061654

APA Style

Liang, Q., Li, J., Pan, R., Yang, X., Zeng, Y., Shi, C., Bao, H., Li, P., Fu, M., & Tian, S. (2025). Preparation of Strontium Hydroxystannate by a Hydrothermal Method and Its Photocatalytic Performance. Processes, 13(6), 1654. https://doi.org/10.3390/pr13061654

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