Faculty of Materials Science and Technology, University of Science, VNU-HCM, 227 Nguyen Van Cu Street, Ward 4, District 5, Ho Chi Minh City, 700000, Viet Nam; Vietnam National University - Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Viet Nam.
Faculty of Materials Science and Technology, University of Science, VNU-HCM, 227 Nguyen Van Cu Street, Ward 4, District 5, Ho Chi Minh City, 700000, Viet Nam; Ho Chi Minh City University of Technology (HUTECH), 475A Dien Bien Phu Street, Ward 25, Binh Thanh District, Ho Chi Minh City, 700000, Viet Nam.
Chemosphere. 2021 Apr;268:129291. doi: 10.1016/j.chemosphere.2020.129291. Epub 2020 Dec 13.
In this report, the peroxymonosulfate activation over Ag/ZnO heterojunction under visible light (Ag/ZnO/PMS/Vis) for p-nitrophenol (p-NP) contaminant degradation was conducted in detail. Herein, the catalyst dosage was decreased, and the results showed that a dosage of 0.5 g L Ag/ZnO and 4 mM PMS almost completely degraded 30 mg L p-NP after 90 min of irradiation. In addition, the PMS activation mechanism of Ag/ZnO/PMS/Vis system was proposed by investigations of the influence of PMS concentration, the FTIR spectra, UV-Vis spectroscopy, and electrochemical analyses. Additionally, the role of SO in the photocatalytic reaction is determined by a combination of a trapping test using isopropanol and tert-butanol as probe compounds and electron spin resonance (ESR) spectroscopy. This report provides a potential alternative to remove persistent organic contaminants in sewage using PMS incorporated with Ag/ZnO under visible light irradiation.
本报告详细研究了可见光下（Ag/ZnO/PMS/Vis）过一硫酸盐（PMS）活化 Ag/ZnO 异质结降解对硝基苯酚（p-NP）污染物的情况。在此过程中，催化剂用量减少，结果表明，在 90 分钟的照射下，0.5 g L Ag/ZnO 和 4 mM PMS 的用量几乎可以完全降解 30 mg L p-NP。此外，还通过研究 PMS 浓度、傅里叶变换红外光谱（FTIR）、紫外可见光谱和电化学分析等因素对 Ag/ZnO/PMS/Vis 体系的 PMS 活化机制进行了探讨。此外，通过异丙醇和叔丁醇作为探针化合物的捕获试验和电子自旋共振（ESR）光谱相结合，确定了 SO 在光催化反应中的作用。本报告提供了一种在可见光照射下使用 PMS 与 Ag/ZnO 结合去除污水中持久性有机污染物的潜在方法。
