期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 260, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118128
关键词
Emerging contaminants; Advanced oxidation process; Photocatalysis; Magnesium oxide; Oxygen vacancy
资金
- Tarbiat Modares University, Tehran, Iran [IG-39801]
- Ministry of Health, Iran
Ag-doped S-MgO powder was synthesized by doping of S-MgO with Ag and its photocatalytic activity was investigated under UVA-LED light irradiation for diclofenac (DCF) degradation. The S-MgO doped with 1 mol% of Ag showed the highest photocatalytic activity under UVA irradiation. The Ag-doped S-MgO was nanosphere with a band gap of 2.20 eV and the surface defects. Introducing Ag in the lattice of S-MgO accelerated the charge transfer and thus its photocatalytic activity. Complete degradation of 50 mg/L DCF was achieved via non-radical singlet oxygen mechanism within 15 min in the UVA/LED photocatalytic process with Ag-doped S-MgO in natural pH. In addition, 86% of DCF was mineralized within 60 min in the process. Reusability of the catalyst was successfully carried out for five consecutive runs. Accordingly, the Ag-doped S-MgO nanosphere is an efficient and durable catalyst effectively activated using a relatively low dose of UVA radiation for the degradation and mineralization of emerging water contaminants.
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