School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, 230601, PR China.
School of Food and Biological Engineering, Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes, Hefei University of Technology, Hefei, 230009, PR China.
Dalton Trans. 2023 Feb 21;52(8):2335-2344. doi: 10.1039/d2dt03596k.
In this work, a MXene@AgPd/polydopamine (PDA) nanosheet with excellent photothermal conversion efficiency was successfully synthesized by a simple redox-oxidative polymerization method. Interestingly, AgPd bimetallic nanocrystals sandwiched between a MXene nanosheet and PDA layer have cage-like nanostructure, which is favorable for high catalytic efficiency and antibacterial performance. Importantly, the MXene@AgPd/PDA nanosheet exhibits good catalytic activity for the reduction of 4-nitrophenol (1.2 min mg) and the catalytic dynamics can be improved by about 1.2 times under NIR (near-infrared light, 808 nm, and 2.5 W cm) irradiation. As the PDA shell is well protected, the MXene@AgPd/PDA nanosheet retained more than 90% catalytic activity after 6 cycles. In addition, due to the presence of the Ag component, the MXene@AgPd/PDA nanosheet exhibited good antibacterial activity against both Gram-negative () and Gram-positive () bacteria. Under near-infrared light irradiation, its antibacterial activity was further enhanced due to the NIR photothermal effect.
在这项工作中，通过一种简单的氧化还原聚合方法成功合成了具有优异光热转换效率的 MXene@AgPd/聚多巴胺（PDA）纳米片。有趣的是，夹在 MXene 纳米片和 PDA 层之间的 AgPd 双金属纳米晶具有笼状纳米结构，有利于提高催化效率和抗菌性能。重要的是，MXene@AgPd/PDA 纳米片对 4-硝基苯酚（1.2 min mg）的还原表现出良好的催化活性，并且在近红外光（808nm，2.5W cm）照射下，催化动力学可提高约 1.2 倍。由于 PDA 壳得到了很好的保护，MXene@AgPd/PDA 纳米片在 6 次循环后仍保持超过 90%的催化活性。此外，由于存在 Ag 组分，MXene@AgPd/PDA 纳米片对革兰氏阴性菌（）和革兰氏阳性菌（）均表现出良好的抗菌活性。在近红外光照射下，由于近红外光热效应，其抗菌活性进一步增强。
