Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China; Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, China.
Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China.
Chemosphere. 2019 Mar;218:966-973. doi: 10.1016/j.chemosphere.2018.11.185. Epub 2018 Nov 28.
A novel ternary nanocomposite photocatalyst, Ag-BiOI- reduced graphene oxide (rGO), driven by visible light was successfully synthesized with hydrothermal strategy. XRD, SEM, TEM, HRTEM, EDS, raman spectroscopy, XPS, DRS, photocurrent and EIS analysis were employed to characterize all synthesized compounds. Compared to pure BiOI, Ag-BiOI and BiOI-rGO, the 5 mol% Ag-BiOI-rGO 5 wt% displayed superior photocatalytic capability with complete removal of diclofenac (10.0 μg mL) in 80 min under visible light. The characterization results indicated that the addition of Ag and rGO enhanced the charge separation and suppressed the recombination of photogenerated electrons and holes, which upgraded the ability of Ag-BiOI-rGO to degrade diclofenac compared with BiOI. Six reaction intermediates of diclofenac were detected by LC-MS/MS, subsequently, two degradation routes were proposed. This work provides a promising strategy to fabricate more effective photocatalysts to deal with organic pollutants in wastewater.
采用水热法成功合成了一种新型三元纳米复合光催化剂 Ag-BiOI-还原氧化石墨烯(rGO)，该催化剂可被可见光激发。通过 XRD、SEM、TEM、HRTEM、EDS、拉曼光谱、XPS、DRS、光电流和 EIS 分析对所有合成的化合物进行了表征。与纯 BiOI、Ag-BiOI 和 BiOI-rGO 相比，5 mol%Ag-BiOI-rGO 5 wt%在可见光下 80 min 内完全去除了 10.0μg/mL 的双氯芬酸，表现出优异的光催化性能。表征结果表明，Ag 和 rGO 的加入增强了电荷分离，抑制了光生电子和空穴的复合，这使得 Ag-BiOI-rGO 降解双氯芬酸的能力优于 BiOI。通过 LC-MS/MS 检测到双氯芬酸的 6 种反应中间体，随后提出了两种降解途径。这项工作为制备更有效的光催化剂来处理废水中的有机污染物提供了一种有前途的策略。
