(432b) Facile Synthesis of Single-Crystalline Sn Dendrites Via Galvanic Replacement Reaction and Their Thermal Conversion to SnO2

Jia, W., University of Connecticut
Su, L., University of Connecticut
Lei, Y., University of Connecticut

Tin (Sn) dendrites have been fabricated using galvanic replacement reaction between thermal evaporated zinc (Zn) films and stannous chloride (SnCl2). The Zn film is found to be composed of Zn nanodiscs. The replacement reaction was fast and the produced dendritic Sn has a single crystalline structure. The growth process was studied by changing the concentration of SnCl2 in the replacement reaction, and the growth direction was further analyzed by electron diffraction. The as-prepared Sn is further oxidized by rheotaxial growth and thermal oxidation (RGTO) process to retain the structure of the template. The electrochemical property of SnO2 was demonstrated in the redox reaction of hydrogen peroxide (H2O2), and the reduction of H2O2 was greatly enhanced. This study provides a promising route to the facile synthesis of functional metals/metal oxides with novel structures.