Department of Environmental Engineering, National Chung Hsing University, Taichung, 402, Taiwan, ROC.
Department of Environmental Science and Engineering, Tunghai University, Taichung, 407, Taiwan, ROC.
Chemosphere. 2021 Aug;277:130348. doi: 10.1016/j.chemosphere.2021.130348. Epub 2021 Mar 22.
A zinc-blende/wurtzite (ZB/WZ) copper indium sulfide (CuInS/CIS) polymorph with high visible-light absorption ability and high charge separation rate was developed by using a facile polyol method. Results showed that when thioacetamide served as a sulfur precursor, the crystalline phase of CIS was zinc-blende. Meanwhile, when thiourea served as a sulfur precursor, the crystalline phase of CIS was wurtzite, which exhibited good photocatalytic acid red 1 (AR1) dye decolorization efficiency. When the precursor/ethylene glycol ratio was 1/50-7/50, the AR1 decolorization efficiency followed the order: T-5-CIS > T-7-CIS > T-3-CIS > T-1-CIS, and the TOC removal efficiency of T-5-CIS was 45.7%. The PL and EIS analyses indicated that T-5-CIS showed the highest charge separation rate. Mott-Schottky analysis demonstrated that the remarkably enhanced photocatalytic decolorization rate was ascribed to the stronger reduction potential of CIS with the mixed ZB/WZ phases and the redox potential difference between the ZB and WZ phases, leading to a good oxidation ability and charge separation. The results indicated that O was the main reactive specie in this study, and this study provided a potential photocatalyst in the treatment of dye wastewater.
一种具有高光吸收能力和高电荷分离速率的闪锌矿/纤锌矿（ZB/WZ）铜铟硫（CuInS/CIS）多晶型物是通过使用简单的多元醇方法开发的。结果表明，当硫代乙酰胺作为硫前体时，CIS 的晶相为闪锌矿。同时，当硫脲作为硫前体时，CIS 的晶相为纤锌矿，具有良好的光催化酸性红 1（AR1）染料脱色效率。当前驱体/乙二醇的比例为 1/50-7/50 时，AR1 的脱色效率顺序为：T-5-CIS>T-7-CIS>T-3-CIS>T-1-CIS，T-5-CIS 的TOC 去除效率为 45.7%。PL 和 EIS 分析表明，T-5-CIS 表现出最高的电荷分离速率。Mott-Schottky 分析表明，较强的还原电位归因于混合 ZB/WZ 相的 CIS 和 ZB 与 WZ 相之间的氧化还原电位差，从而增强了光催化脱色速率，具有良好的氧化能力和电荷分离。结果表明，在这项研究中，O 是主要的反应物种，这项研究为处理染料废水提供了一种潜在的光催化剂。
