Tran Vy Anh, Sang Tran Thanh, Thu Nguyen Anh, Vo Vien, Le Van Thuan, Doan Van Dat, Thi Vo Thu-Thao, Dat Nguyen Duy
Department of Material Science, Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University Ho Chi Minh City 700000 Vietnam
Faculty of Chemical & Food Technology, University of Technology and Education Thu Duc Ho Chi Minh City 700000 Vietnam
RSC Adv. 2024 Sep 30;14(42):31171-31182. doi: 10.1039/d4ra05657d. eCollection 2024 Sep 24.
This study explores the synthesis, characterization, and photocatalytic properties of bismuth metal-organic framework (Bi-MOF) nanorods and their derivatives such as Ag/Bi-MOF and Ag/BiO. Bi-MOF nanorods exhibit significant photocatalytic activity under visible light, with the addition of silver (Ag) enhancing electron-hole pair separation and reducing their recombination. This leads to improved photocatalytic performance, particularly in the degradation of organic pollutants such as Rhodamine B (RhB) and Methylene Blue (MB). The results show that Bi-MOF and its derivatives demonstrate excellent chemical stability and high performance in photocatalytic applications, even when subjected to high temperatures and tested across a wide pH range. The large surface area and microporous structure facilitate selective adsorption of small organic molecules like MB. The pores and large surface area not only provide numerous active sites but also enhance the interaction between reactants and the catalyst surface, improving photocatalytic efficiency. Bi-MOF and its derivatives perform optimally across a broad pH range, from acidic to alkaline environments, where strong oxidizing hydroxyl radicals (·OH) are easily formed, aiding in the effective degradation of organic compounds. The study also shows that Bi-MOF and its derivatives can be reused multiple times without significant loss in performance. This research contributes to the development of advanced materials for environmental remediation, highlighting the potential of Bi-MOF-based nanocomposites in practical applications.
本研究探索了铋基金属有机框架（Bi-MOF）纳米棒及其衍生物（如Ag/Bi-MOF和Ag/BiO）的合成、表征及光催化性能。Bi-MOF纳米棒在可见光下表现出显著的光催化活性，银（Ag）的加入增强了电子-空穴对的分离并减少了它们的复合。这导致光催化性能得到改善，特别是在降解罗丹明B（RhB）和亚甲基蓝（MB）等有机污染物方面。结果表明，Bi-MOF及其衍生物在光催化应用中表现出优异的化学稳定性和高性能，即使在高温下并在较宽的pH范围内进行测试也是如此。大的表面积和微孔结构有利于对MB等小有机分子的选择性吸附。孔隙和大表面积不仅提供了大量活性位点，还增强了反应物与催化剂表面之间的相互作用，提高了光催化效率。Bi-MOF及其衍生物在从酸性到碱性的广泛pH范围内都能发挥最佳性能，在这些环境中容易形成强氧化性的羟基自由基（·OH），有助于有效降解有机化合物。该研究还表明，Bi-MOF及其衍生物可以多次重复使用而性能无显著损失。这项研究有助于开发用于环境修复的先进材料，突出了基于Bi-MOF的纳米复合材料在实际应用中的潜力。
