One-pot preparation of nanoporous Ag-Cu@Ag core-shell alloy with enhanced oxidative stability and robust antibacterial activity.
One-pot preparation of nanoporous Ag-Cu@Ag core-shell alloy with enhanced oxidative stability and robust antibacterial activity.
复制标题
一锅法制备具有增强氧化稳定性和强抗菌活性的纳米多孔Ag-Cu@Ag核壳合金
DOI：
10.1038/s41598-017-10630-5
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发表时间：
2017-08-31
影响因子：
4.6
通讯作者：
Yao KF
中科院分区：
文献类型：
--
作者：
Liu X;Du J;Shao Y;Zhao SF;Yao KF
金属核壳纳米结构因其在催化、光学、电学和磁学等方面的优异性能以及贵金属比单金属纳米结构成本低等优点，引起了人们极大的研究兴趣，但其合成方法复杂而昂贵。因此，开发一锅法合成低成本的金属核壳纳米结构具有重要意义。采用一锅化学脱合金法成功地制备了一种新型的以铜为载体、以银为壳、以银-铜为核的纳米多孔银铜合金，为用简单的方法制备金属核壳纳米结构提供了一条新的途径。所制备的纳米多孔Ag-Cu@Ag核壳合金在室温下表现出良好的空气稳定性，并提高了氧化稳定性，与已报道的其他铜@Ag核壳微粒相比，具有更好的稳定性。此外，纳米多孔Ag-Cu@Ag核壳合金对E.Coli DH5α也具有较强的抗菌活性。简单、低成本的合成方法以及优异的氧化稳定性为纳米孔Ag-Cu@Ag核壳合金提供了广阔的应用前景。
Metallic core–shell nanostructures have inspired prominent research interests due to their better performances in catalytic, optical, electric, and magnetic applications as well as the less cost of noble metal than monometallic nanostructures, but limited by the complicated and expensive synthesis approaches. Development of one-pot and inexpensive method for metallic core–shell nanostructures’ synthesis is therefore of great significance. A novel Cu network supported nanoporous Ag-Cu alloy with an Ag shell and an Ag-Cu core was successfully synthesized by one-pot chemical dealloying of Zr-Cu-Ag-Al-O amorphous/crystalline composite, which provides a new way to prepare metallic core–shell nanostructures by a simple method. The prepared nanoporous Ag-Cu@Ag core-shell alloy demonstrates excellent air-stability at room temperature and enhanced oxidative stability even compared with other reported Cu@Ag core-shell micro-particles. In addition, the nanoporous Ag-Cu@Ag core-shell alloy also possesses robust antibacterial activity against E. Coli DH5α. The simple and low-cost synthesis method as well as the excellent oxidative stability promises the nanoporous Ag-Cu@Ag core-shell alloy potentially wide applications.
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