The effect of pH on the photocatalytic degradation of methyl orange using decorated ZnO nanoparticles with SnO2 nanoparticles
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- 作者：Sedigheh Abbasi ; Maryam Hasanpour
- 刊名：Journal of Materials Science: Materials in Electronics
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：28
- 期：2
- 页码：1307-1314
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
- 出版者：Springer US
- ISSN：1573-482X
- 卷排序：28
文摘
In this study we investigate for the first time the effect of pH on the photocatalytic activity of SnO2 nanoparticles, ZnO nanoparticles and hybrids containing decorated ZnO nanoparticles with difference amount of SnO2 nanoparticles (ZnO–SnO2 (1–0.5) and ZnO–SnO2 (1–2)). The experimental results show that the removal efficiency of methyl orange increases with respect to the irradiation time in all of the tested suspensions. Meanwhile, the effect of pH confirm that the removal efficiency of pollutant in the suspension with natural pH (pH = 7) is higher than that of acidic (pH = 4) and alkaline condition (pH = 10). The results of statistical analysis reveal that the irradiation time and pH have significant impact on the photocatalytic activity of all nanoparticles and hybrids. The coefficient of determination of all proposed models justify that the proposed models can be successfully predicted the removal efficiency of methyl orange in the all suspensions. The results of Duncan’s multiple range test (α = 0.05) demonstrate that there is a significant difference between different levels of pH. Also, the photocatalytic activity of hybrid increase by increasing the decorated SnO2 nanoparticles content.