期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 953, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2023.170113
关键词
ZnSn(OH)6; SrSn(OH)6; Heterojunction; Perovskite-structured hydroxide; Photocatalyst; Toluene
A ZnSn(OH)6/SrSn(OH)6 perovskite-structured hydroxide heterojunction was synthesized and employed in the degradation of toluene under UV light. The optimal sample, 20% ZSH/SSH heterojunction, exhibited significantly higher toluene degradation rate compared to SrSn(OH)6 and ZnSn(OH)6. The reactive radicals center dot OH and center dot O2- generated in the SrSn(OH)6/ZnSn(OH)6 system played a key role in the degradation process.
A ZnSn(OH)6/SrSn(OH)6 perovskite-structured hydroxide heterojunction was constructed by a simple one-pot hydrothermal method and applied to degrade toluene under UV light. The optimal sample 20% ZnSn(OH)6/SrSn(OH)6 heterojunction (named 20% ZSH/SSH) exhibits a toluene degradation rate of 86.55%, which is 26.34% and 20.13% higher than that of SrSn(OH)6 and ZnSn(OH)6 for 30 min, respec-tively. The ESR shows that center dot OH and center dot O2- generated in the SrSn(OH)6/ZnSn(OH)6 system acted as the main reactive radical to induce the degradation of toluene. Moreover, the degradation process of toluene was also investigated by In-situ DRIFTS, which demonstrates a pathway that ZnSn(OH)6/SrSn(OH)6 could promote the conversion of toluene to benzyl alcohol, benzaldehyde, benzoic acid, and then mineralized to H2O and CO2. This work offers a promising approach for building perovskite-structured hydroxide heterojunction by a simple one-pot hydrothermal method to improve photocatalytic performance for reducing indoor air contamination.(c) 2023 Published by Elsevier B.V.
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