Performance promotion of Ag2O photocatalyst by particle size and crystal surface regulation
Performance promotion of Ag2O photocatalyst by particle size and crystal surface regulation
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通过粒径和晶面调节提高Ag2O光催化剂的性能
DOI：
10.1039/d0nj00255k
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发表时间：
2020-07-07
影响因子：
3.3
通讯作者：
Jiang, Wei
中科院分区：
文献类型：
--
作者：
He, Jian;Fu, Hongyan;Jiang, Wei
Ag2O的光催化性能不足，使其难以应用于实际的工业印染废水处理系统，这些废水含有多种有机污染物。因此，提高Ag2O的光催化性能是当务之急。本研究通过单因素实验筛选出影响Ag2O光催化剂性能的主要因素。通过响应面设计法对Ag2O的制备工艺条件进行了优化。所制备的Ag2 O对甲基橙橙子和苯酚具有良好的光降解性能，但对罗丹明B的降解明显滞后。之后，引入吡啶来调整Ag2O的晶面结构。结果表明，Ag2O的光催化氧化能力得到了很大的提高。90%的罗丹明在25分钟内被去除。此外，还通过精细表征研究了控制光催化性能的机理。
The insufficient photocatalytic performance of Ag2O makes it difficult to apply to actual industrial printing and dyeing waste water treatment systems, which contain a variety of organic pollutants. Therefore, it is urgent to improve the photocatalytic performance of Ag2O. In this study, the main factors affecting the properties of Ag2O photocatalysts were screened out by single factor experiments. Then, the optimum conditions for the preparation of Ag2O were simulated by response surface design. The prepared Ag2O showed good photodegradation performance to methyl orange and phenol, but the degradation of rhodamine B was significantly delayed. After that, the pyridine was introduced to adjust the crystal plane structure of Ag2O. The results showed that the photocatalytic oxidation capacity of Ag2O was greatly improved. Ninety percent of rhodamine was removed within 25 minutes. Moreover, the mechanism of controlling the photocatalytic performance has also been studied through fine characterizations.