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首页> 外文期刊>Separation and Purification Technology >Constructing a compact heterojunction structure of Ag2CO3/Ag2O in-situ intermediate phase transformation decorated on ZnO with superior photocatalytic degradation of ibuprofen
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Constructing a compact heterojunction structure of Ag2CO3/Ag2O in-situ intermediate phase transformation decorated on ZnO with superior photocatalytic degradation of ibuprofen

机译：构建ZnO的Ag2CO3 / Ag2O原位中间相变的紧凑型异质结构，具有卓越的光催化降解布洛芬的ZnO

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摘要

In this study, the ZnO/Ag2CO3/Ag2O photocatalyst had been successfully fabricated via the facile two-step synthesis method, which included the heterojunction of Ag2CO3 on ZnO, followed by the in-situ phase transformation method of Ag2CO3/Ag2O. The phase transformation from Ag2CO3 to Ag2O over ZnO surfaces was observed in different phase structures and the O atom possessed by Ag2O had diffused towards the Ag2CO3 surface, signifying the presence of Ag2CO3/Ag2O heterostructure over the ZnO. The result indicates that the heterojunction of Ag2CO3/Ag2O over ZnO surfaces exhibited a 99.3% photodegradation of Ibuprofen (IBF) solution under visible-light irradiation, with 10-folds higher reaction rate compared to the pristine ZnO. Compact interfacial heterojunction in ZnO-Ag2CO3-Ag2O sample had promoted effective interfacial charge transfers due to synergistic effect of Ag2CO3/Ag2O heterostructure. This situation leads an extended light absorption due to light sensitive Ag2CO3 and Ag2O which can all lead to an improved photocatalytic activity of the ZnO/Ag2CO3/ Ag2O. Experimental and characterization results have shown that a plausible mechanism of highlighting the surface of redox reaction and charge transfer pattern on ZnO/Ag2CO3/Ag2O had been attained. Hence, heterojunction with interface structure could be a promising photocatalyst for photocatalytic applications.
机译：在该研究中，通过容易的两步合成方法成功地制造了ZnO / Ag2CO 3 / Ag2O光催化剂，其包括在ZnO上的Ag 2 CO 3的异质结，其次是Ag2CO3 / Ag2O的原位相变法。在不同相结构中观察到从ZnO表面上的相变从ZnO表面上的相变，并且通过Ag2O具有的O原子朝向Ag2CO 3表面扩散，在ZnO上表示Ag 2 CO 3 / Ag2O异质结构的存在。结果表明，在ZnO表面上，Ag 2 CO 3 / Ag2O的异质结显示出在可见光照射下的99.3％的布洛芬（IBF）溶液的光降解，与原始ZnO相比，对反应速率的10倍较高。 ZnO-Ag2CO3-Ag2O样品中的紧凑型界面异质结促进了由于Ag2CO3 / Ag2O异质结构的协同作用而促进了有效的界面电荷转移。这种情况导致光敏Ag2CO3和Ag2O引起的延伸光吸收，这一切都可以导致ZnO / Ag2Co3 / Ag2O的改善的光催化活性。实验性和表征结果表明，突出氧化还原反应表面的合理机制和ZnO / Ag2CO3 / Ag2O上的电荷转移图案。因此，具有界面结构的异质结可能是光催化应用的有希望的光催化剂。

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