Constructing nanoflower-like semiconductor–insulator SrCO3/SrTiO3 heterojunction photocatalyst for the efficient removal of TC by the synergistic effect of adsorption and photocatalysis

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2025-01-23 DOI:10.1016/j.poly.2025.117420

Meng Wen, Qi Guo, Xiaoling Liu, Xiang Li, Heping Li, Haijuan Zhan, Wanyi Liu

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Abstract

A combination of adsorption and photocatalysis is a promising method to degrade organic pollutants. Herein, the work adopts SrTiO₃ semiconductor coupled with insulator SrCO₃ via an in-situ solvent method to construct a heterojunction with built-in electric field (IEF) photocatalyst, which improves excellently the electrons-holes (h⁺-e^-) separation and adsorption performance on SrTiO₃. The close heterojunction and the IEF formed at the heterojunction interface enhance the transfer and separation of photogenerated carriers, generating more active substances. Meanwhile, the unique nanoflower structure of SrCO₃/SrTiO₃ and the introduction of SrCO₃ provide more adsorption sites and active centers, which is conducive to the adsorption and activation of TC. Thus, the maximum adsorption capacity of SrCO₃/SrTiO₃ could be up to 47.15 mg/g^-¹ within 30 min. Compared with pure SrTiO₃, SrCO₃/SrTiO₃ exhibited the excellent removal of tetracycline hydrochloride (TC) (120 min, 90.5 %) via the synergistic effect of adsorption and photocatalysis under visible light, and its photocatalytic reaction rate was 24.79 and 3 times higher than SrCO₃ and SrTO₃, individually. h⁺and •O₂^– played a pivotal role in TC degradation. Additionally, the adsorption behavior of TC on SrCO₃/SrTiO₃ composite and the photocatalytic degradation mechanism of SrCO₃/SrTiO₃ were investigated in detail. This work provides a new idea for improving the photocatalytic performance of SrTiO₃ and the application of insulators in photocatalysis.

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利用吸附和光催化的协同效应构建纳米花状半导体-绝缘体 SrCO3/SrTiO3 异质结光催化剂以高效去除 TC

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.