State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, Liaoning, 116024, PR China.
State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, Liaoning, 116024, PR China; Engineering Laboratory of Boric and Magnesic Functional Material Preparative and Applied Technology, 2 Linggong Road, Dalian, Liaoning, 116024, PR China.
J Hazard Mater. 2020 Apr 5;387:121687. doi: 10.1016/j.jhazmat.2019.121687. Epub 2019 Nov 13.
M-NP@Zn-BIF (M-NP = Ag or Cu nanoparticle; Zn-BIF is a zinc-based boron imidazolate framework, Zn(BH(2-mim))(obb); 2-mim = 2-methylimidazole; obb = 4,4'-oxybis(benzoate)) composites were successfully in-situ synthesized by utilizing the reducing ability of the BH bond contained in the Zn-BIF at room temperature without any additional chemical reduction reagents. These composites (225 μg/mL) exhibited excellent catalytic activity to convert 4-nitrophenol to 4-aminophenol in 2.5 min and 6 min with a conversion rate of 99.9 %, respectively. In addition, Ag@Zn-BIF (50 μg/mL) showed highly synergistic antibacterial activity against both Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) with a bactericidal rate of approximately 99.9 %. An antibacterial mechanism was proposed for the generation of intracellular reactive oxygen species (ROS) levels. Superoxide radicals (O) and hydroxyl radicals (OH) formed during the antibacterial process were shown to accelerate the death of bacteria. They also exhibited highly photocatalytic activity for Rhodamine B (RhB). When the concentration of the composites is 1000 μg/mL, the photocatalytic efficiency of Ag@Zn-BIF and Cu@Zn-BIF increased by 31.62 and 18.13 times compared with Zn-BIF, respectively. All in all, this study developed a simple and versatile integrated platform for the removal of nitrophenols, organic dyes, and the effective inactivation of bacteria in water.
M-NP@Zn-BIF（M-NP=银或铜纳米颗粒；Zn-BIF 是一种基于锌的硼咪唑框架，Zn（BH（2-mim））（obb）；2-mim=2-甲基咪唑；obb=4,4'-氧双（苯甲酸））复合材料是通过利用 Zn-BIF 中含有的 BH 键在室温下的还原能力原位合成的，无需任何额外的化学还原试剂。这些复合材料（225μg/mL）在 2.5 分钟和 6 分钟内将 4-硝基苯酚高效催化转化为 4-氨基酚，转化率分别达到 99.9%。此外，Ag@Zn-BIF（50μg/mL）对大肠杆菌（E. coli）和金黄色葡萄球菌（S. aureus）表现出高度协同的抗菌活性，杀菌率约为 99.9%。提出了一种抗菌机制，用于产生细胞内活性氧（ROS）水平。在抗菌过程中形成的超氧自由基（O）和羟基自由基（OH）被证明可以加速细菌的死亡。它们还对 Rhodamine B（RhB）表现出高度的光催化活性。当复合材料浓度为 1000μg/mL 时，Ag@Zn-BIF 和 Cu@Zn-BIF 的光催化效率分别比 Zn-BIF 提高了 31.62 倍和 18.13 倍。总之，该研究开发了一种简单且通用的集成平台，用于去除水中的硝基酚、有机染料和有效灭活细菌。
