光降解
光催化
孔雀绿
异质结
降级(电信)
材料科学
化学工程
可见光谱
己烷
光化学
光致发光
催化作用
杂质
化学
光电子学
色谱法
有机化学
电信
吸附
计算机科学
工程类
作者
Rizki Marcony Surya,Sri Mauliddiyah,Dewangga Oky Bagus Apriandanu,Sudirman Sudirman,Yoki Yulizar
出处
期刊:Chemosphere
[Elsevier]
日期:2022-05-25
卷期号:304: 135125-135125
被引量:35
标识
DOI:10.1016/j.chemosphere.2022.135125
摘要
Malachite green (MG) contributes to water contamination because its accumulation adversely impacts aquatic systems. For the first time, we prepare a high photoresponse of ZnO/SmMnO3 heterojunction via a high-speed stirring method at the nonpolar-polar interface assisted by Alstonia scholaris leaves extract (ASLE) as natural hydrolyzing and stabilizing agents. The heterojunction formation boosts the photocatalytic activity of ZnO up to 91.74% under visible light irradiation. Photoluminescence analysis confirmed that modification with SmMnO3 increases the separation of photogenerated charges and plummets the recombination rates of electron-holes, which induces high photodegradation of MG. With 3 mg of catalyst, the %TOC removal efficiency for MG degradation over ZnO/SmMnO3 was found to be 53.09%, which is higher than that over ZnO. The kinetics model for the photocatalytic reaction was a pseudo-first-order with excellent stability in four consecutive cycles with no structural change. The radical trapping experiment suggests that h+ was the major species in the MG photodegradation reaction. Additionally, morphology and elemental analyses clearly present the formation of ZnO/SmMnO3 heterojunction without any impurities. The current research demonstrates a simple and advanced technique to design heterojunction photocatalyst at the interface of hexane-water.
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