SnO2 nanosheets grown on graphene sheets with enhanced lithium storage properties

Shujiang Ding, Deyan Luan, Freddy Yin Chiang Boey, Jun Song Chen, Xiong Wen (David) Lou
2011 Chemical Communications  
Experimental section Materials Preparation The graphene oxide (GO) sheets were first synthesized by a modified Hummers' method. 1-2 In a typical synthesis of G-SnO 2 NSs, 3 mg of GO sheets was dispersed into 40 mL of 10 mM mercapto acetic acid solution by ultrasonicaiton for 30 minutes. 0.3 mL of HCl solution (37 wt%, Sigma-Aldrich) was added to mecapto acetic acid solution. After stirring for 10 minutes, 100 mg of tin(II) chloride dihydrate (SnCl 2 ·2H 2 O; 99%, Sigma-Aldrich) and 0.5 g of
more » ... h) and 0.5 g of urea were added. After stirring for 5 minutes, the reaction solution was then transferred to a 60 mL Teflon-lined stainless steel autoclave and kept in an electric oven at 120 o C for 6 h. The autoclave was then taken out from the oven and left to cool down to room temperature. The black precipitate was collected by centrifugation, washed thoroughly with ethanol, and dried at 80 o C for 12 h. The as-prepared GO-SnO 2 NSs were further treated at 400 o C in the atmosphere of 5% H 2 balanced by N 2 for 2 h with a heating rate of 1 o C min -1 to obtain the G-SnO 2 NSs. Material Characterizations The product morphology was examined using field-emission scanning electron microscopy (FESEM; JEOL, JSM-6700F, 5 kV) and transmission electron microscopy Electronic Supplementary Material (ESI) for Chemical Communications This journal is
doi:10.1039/c1cc11968k pmid:21607244 fatcat:oofvsmsutzfvfdwgxa4rcfgfeu