Electrochemical investigations of oxide coated nanoparticles

2020-02-16 16:50:44

TiO2 AG nanoparticles Au oxide

责任者: Suryanarayanan, V.;Tom, R.T.;Sreekumaran Nair, A.;Pradeep, T. 单位: Dept. of Chem., Indian Inst. of Technol., Madras, India 来源出处: PINSA-A (Proceedings of the Indian National Science Academy) Part A (Physical Sciences)(PINSA-A (Proc. Indian Natl. Sci. Acad. A, Phys. Sci.) (India)),2004/05/,70(3):483-8 摘要: Titania and zirconia covered Au and Ag nanoparticles (Au@TiO2, Au@ZrO2, Ag@TiO2 and Ag@ZrO2) with controllable shell thickness have been prepared by one pot synthesis and characterized by a variety of techniques; the focus of this paper is cyclic voltammetry (CV). High reactivity of Ag nanoparticles towards halocarbons leads to the destruction of the metal core, which was monitored by the decay in the oxidation and reduction current of the Agn/Agn* couple. The study shows that the oxide shell is porous for ion transport. An attempt was made to synthesize oxide coated alloy nanoparticles of different compositions of Au and Ag 关键词: electrochemistry;gold;nanoparticles;oxidation;reduction (chemical);silver;spectrochemical analysis;titanium compounds;voltammetry (chemical analysis);zirconium compounds;electrochemical investigations;oxide coated nanoparticles;Au-TiO2;Au-ZrO2;Ag-TiO2;Ag-ZrO2;pot synthesis;cyclic voltammetry;Ag nanoparticle reactivity;halocarbons;metal core;oxidation current;reduction current;porous oxide shell;ion transport;core-shell nanosystems;optical spectroscopy;electrochemistry;nanochemistry;plasmon resonance;AuTiO2;AuZrO2;AgTiO2;AgZrO2