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Indexed by:期刊论文

Date of Publication:2015-04-20

Journal:COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

Included Journals:SCIE、EI、Scopus

Volume:471

Page Number:81-85

ISSN No.:0927-7757

Key Words:Carbon-tethered Sn particles; Resorcinol-formaldehyde templates; Heat treatment; Interfaces; Mechanical stability

Abstract:A method for the fabrication of carbon-tethered Sn micro/nano composite spheres, a facile one-pot hydrothermal route followed by heat treatment in N-2, is described. Heating of an aqueous solution of SnCl4 and resorcinol-formaldehyde (RF) to 85 degrees C for about 3h in a 50 mL Teflon-lined stainless steel autoclave obtained the SnO2 encapsulated RF composite polymer spheres. Subsequent heat-treatment at 800 degrees C for 2 h under N-2 atmosphere, the RF polymer was carbonized to spherical carbon spheres, whereas SnO2 reduced into nanosized Sn metal that was melted, migrated, and then deposited outside the carbon surface. Variation of the concentration of the two jointly dissolved chemicals and heat treatment temperature enables a variation of the size of the Sn particles. The ordered carbon-tethered Sn composite spheres were characterized by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetrical analysis, and mechanical stable process measurements by ultrasonic oscillations. The mechanical stability of Sn-C is strong enough for ultrasonic oscillations for 30 and 60 min. (C) 2015 Elsevier B.V. All rights reserved.