2D titanium carbide-based nanocomposites for photocatalytic bacteriostatic applications
2D titanium carbide-based nanocomposites for photocatalytic bacteriostatic applications
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DOI：
10.1016/j.apcatb.2020.118609
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发表时间：
2020-06-05
影响因子：
22.1
通讯作者：
Chen, Shougang
中科院分区：
文献类型：
--
作者：
Feng, Huimeng;Wang, Wei;Chen, Shougang
在这项研究中，我们首次报道了碳化钛（Ti 3C 2）基纳米复合材料的设计，以实现高效的抗菌效果。采用简单的湿化学法在室温下合成了稳定的还原态银@碳化钛@氧化亚铜（Ag@Ti3C2@Cu2O）纳米复合材料，并将其作为高效光催化杀菌剂用于废水处理。Ag@Ti3C2@Cu2O纳米复合材料对铜绿假单胞菌和金黄色葡萄球菌具有良好的抗菌活性。通过光致发光光谱分析了复合材料的电子-空穴复合效率，结果表明，纳米复合材料之间的异质结构形成的电荷传输通道显著提高了电荷传输和分离效率，延长了活性电子的寿命，促进了活性氧的产生.密度泛函理论计算和有限元法计算表明，纳米复合材料的结构降低了光电子逃逸的难度，提高了光催化效率。
In this study, for the first time, we report the design of titanium carbide (Ti3C2) - based nanocomposites to realize a highly efficient antibacterial effect. Stable reduced silver @ titanium carbide @ cuprous oxide (Ag@Ti3C2@Cu2O) nanocomposites with efficient antibacterial activities were synthesized via a simple wet chemical method at room temperature and developed as highly efficient photocatalytic bactericides for antifouling. The Ag@Ti3C2@Cu2O nanocomposites showed excellent antibacterial activities against Pseudomonas aeruginosa and Staphylococcus aureus. The electron-hole recombination efficiency of the nanocomposites was analyzed by characterizing the photoluminescence spectra, which indicated that the charge transfer channel imparted by the heterostructure between the nanocomposites considerably improved charge transport and separation efficiency, prolonged the life of active electrons, and promoted the generation of reactive oxygen species. Furthermore, density functional theory calculations and finite element method calculations indicated that the structure of nanocomposites reduces the difficulty of photoelectron escaping during photocatalysis and improves photocatalytic efficiency.