Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Korea.
Department of Metallurgical and Materials Engineering, Inha Technical College, Incheon 22212, Korea.
Int J Mol Sci. 2022 Apr 15;23(8):4398. doi: 10.3390/ijms23084398.
The most pressing concerns in environmental remediation are the design and development of catalysts with benign, low-cost, and efficient photocatalytic activity. The present study effectively generated a flower-like indium oxide (InO-MF) catalyst employing a convenient MOF-based solvothermal self-assembly technique. The InO-MF photocatalyst exhibits a flower-like structure, according to morphology and structural analysis. The enhanced photocatalytic activity of the InO-MF catalyst for 4-nitrophenol (4-NP) and methylene blue (MB) is likely due to its unique 3D structure, which includes a large surface area (486.95 m g), a wide spectrum response, and the prevention of electron-hole recombination compared to InO-MR (indium oxide-micro rod) and InO-MD (indium oxide-micro disc). In the presence of NaBH and visible light, the catalytic performances of the InO-MF, InO-MR, and InO-MD catalysts for the reduction of 4-NP and MB degradation were investigated. Using InO-MF as a catalyst, we were able to achieve a 99.32 percent reduction of 4-NP in 20 min and 99.2 percent degradation of MB in 3 min. Interestingly, the conversion rates of catalytic 4-NP and MB were still larger than 95 and 96 percent after five consecutive cycles of catalytic tests, suggesting that the InO-MF catalyst has outstanding catalytic performance and a high reutilization rate.
在环境修复中，最紧迫的问题是设计和开发具有良性、低成本和高效光催化活性的催化剂。本研究采用简便的基于 MOF 的溶剂热自组装技术，有效地制备了花状氧化铟（InO-MF）催化剂。形貌和结构分析表明，InO-MF 光催化剂具有花状结构。InO-MF 催化剂对 4-硝基苯酚（4-NP）和亚甲基蓝（MB）具有增强的光催化活性，可能是由于其独特的 3D 结构，包括大的比表面积（486.95 m g）、宽的光谱响应以及与 InO-MR（氧化铟-微棒）和 InO-MD（氧化铟-微盘）相比，抑制电子-空穴复合。在 NaBH 和可见光存在的情况下，研究了 InO-MF、InO-MR 和 InO-MD 催化剂对 4-NP 还原和 MB 降解的催化性能。使用 InO-MF 作为催化剂，我们能够在 20 分钟内将 4-NP 的还原率达到 99.32%，在 3 分钟内将 MB 的降解率达到 99.2%。有趣的是，在连续五次催化测试后，催化 4-NP 和 MB 的转化率仍大于 95%和 96%，表明 InO-MF 催化剂具有出色的催化性能和高的可重复利用率。
