Henan Key Laboratory of Rare Earth Functional Materials, International Joint Research Laboratory for Biomedical Nanomaterials of Henan, The Key Laboratory of Rare Earth Functional Materials and Applications, Zhoukou Normal University, Zhoukou 466001, PR China.
University Research Facility in Materials Characterization and Device Fabrication, The Hong Kong Polytechnic University, Hong Kong, PR China.
J Colloid Interface Sci. 2018 Jun 1;519:255-262. doi: 10.1016/j.jcis.2018.02.070. Epub 2018 Feb 27.
Semiconductor photocatalysis has become the focus of recent research on antibiotic treatment because it is a green and efficient technology. In this study, α-GaOOH with several novel microstructures has been synthesized at a low temperature and its subsequent thermal transformation. The influence of pH on the synthesis of α-GaOOH is studied, and the results indicate that pH played an important role in the microstructures of α-GaOOH and β-GaO. All GaO samples possess macro-mesoporous network structures and exhibits a remarkable photocatalytic activity for antibiotic degradation. The photoelectron chemical tests show that the separation efficiency of photogenerated charge carriers of GaO-7.0 is higher than that of other GaO. The enhanced photocatalytic activity of GaO-7.0 is mainly ascribed to its morphology and oxygen vacancy. The active species trapping and photoluminescence measurement experiments indicate that OH and O are the major active species contributing to the photocatalytic process. This study will bring about the potential application in treatment of the antibiotic pollutants.
半导体光催化因其绿色、高效的特点，已成为抗生素处理的研究热点。本研究采用低温合成法，制备了具有多种新颖微观结构的α-GaOOH，并对其随后的热转化过程进行了研究。研究了 pH 值对α-GaOOH 合成的影响，结果表明 pH 值对α-GaOOH 和β-GaO 的微观结构起着重要作用。所有 GaO 样品均具有宏观介孔网络结构，对抗生素降解表现出显著的光催化活性。光电化学测试表明，GaO-7.0 光生载流子的分离效率高于其他 GaO。GaO-7.0 增强的光催化活性主要归因于其形态和氧空位。活性物种捕获和光致发光测量实验表明，OH 和 O 是光催化过程中的主要活性物种。这项研究将为抗生素污染物的处理带来潜在的应用。
