Microwave‐Assisted Synthesis of Ultrastable Cu@TiO2 Core‐Shell Nanowires with Tunable Diameters via a Redox‐Hydrolysis Synergetic Process. Issue 9 (25th June 2018)

• Record Type: Journal Article
• Authors: Liu, Deyu; Wu, Binghui; Mubeen, Syed; Ding, Kunlun; Zeng, Hongmei; Chuong, Tracy T; Moskovits, Martin; Stucky, Galen D.
• Is Part Of: ChemNanoMat. Volume 4:Issue 9(2018)
• Page Start: 914
• Page End: 918
• Publication Date: 2018-06-25
• Subjects: copper -- microwave chemistry -- nanostructures -- photocatalysis -- surface plasmon resonance; Nanochemistry -- Periodicals; Nanostructured materials -- Periodicals; Nanochemistry; Nanostructured materials; Periodicals; 541.2
• DOI: 10.1002/cnma.201800210
• Languages: English
• ISSNs: 2199-692X

Abstract

Abstract: The nanoscale integration of copper metal, frequently with semiconductor heterostructure interfaces, is a promising route for fabricating new micro‐/nanoelectronic devices. Synthesizing such systems using wet‐chemistry methods requires stabilization of nano‐Cu against corrosion/oxidation, which has proven to be challenging. Here we report a methodology for the facile preparation of Cu@TiO2 core‐shell nanowires (NWs). The synthesis combines redox formation of Cu NWs with kinetically controlled hydrolysis of a titania precursor in a single‐pot microwave reaction. The final core‐shell NWs can be precisely tailored with 20‐nm to 140‐nm Cu core diameters, aspect ratios >250, and a 10‐nm porous titania shell. This metal/semiconductor heterojunction is particularly important for its excellent photocatalytic activity. The rapid microwave‐assisted synthesis provides a potentially generalizable paradigm for the rational design of heterogeneous nanostructures with metals and oxides. Abstract : Fast, convenient, and uniform : High‐quality and ultrastable core‐shell Cu@TiO2 nanowires were synthesized by a microwave‐assisted one‐pot method, integrating the hydrolysis reaction towards TiO2 with the metal nanocrystal growth. The diameter of the Cu@TiO2 nanowires is selectively controllable by the reaction conditions.