SnO2/reduced graphene oxide composite films for electrochemical applications

Abstract

SnO 2 /GO (GO is graphene oxide) composite films with GO mass fraction w C ranging from 0.01 to 80% have been prepared using colloidal solutions. Heat treatment of SnO 2 /GO films in Ar atmosphere at 400 • C leads to GO reduction accompanied by partial exfoliation and decreasing of the particle thickness. SnO 2 /rGO (rGO is reduced GO) film electrodes demonstrate a high electrocatalytic activity in the anodic oxidation of inorganic (iodide-, chloride-, sulfite-anions) and organic (ascorbic acid) substances. The increase of the anodic current in these reactions is characterized by overpotential inherent to the individual rGO films and exchange current density grows linearly with rGO concentration at w C ≤ 10% indicating that the rGO particles in composites act as sites of electrochemical process. The SnO 2 /rGO composite films, in which the chemically stable oxide matrix encapsulates the rGO inclusions, can be considered as a promising material for applied electrochemistry.

Influence of interface combination of RGO-photosensitized SnO 2 @RGO core-shell structures on their photocatalytic performance

“…The decrease of the I D /I G ratio in the SG-E and SG-C suggested the removal of oxygenated groups and the restoration of the sp 2 carbon atoms during the thermal treatment process [43,44]. Thus, it could be concluded that GO in the core-shell structures could be effectively reduced via the thermal treatment process, which was consistent with the results of FTIR and XPS.…”

Overcoming the Challenges of Freestanding Tin Oxide‐Based Composite Anodes to Achieve High Capacity and Increased Cycling Stability

“…[ 39 ] In comparison, ATO/GO features additional weight loss steps at 220 °C related to the loss of oxygen containing groups on the surface of GO. [ 40 ] The weight fraction of the ATO phase in the ATO/C/rGO and ATO/C‐2/rGO composites is much lower, equaling 65 and 54 wt%, respectively, due to the additional carbon coating (Figure 1b and Figure S4b, Supporting Information).…”

Making Ultrafast High‐Capacity Anodes for Lithium‐Ion Batteries via Antimony Doping of Nanosized Tin Oxide/Graphene Composites

“…The TGA curves of GO in air show a weight loss at around 200 °C and between 500 and 600 °C (Figure b) due to the combustion of oxygen‐containing groups and the gradual decomposition of the GO, respectively . In contrast, rGO shows practically no weight loss in the range of 25–250 °C due to the absence of oxygen groups and only a small amount of adsorbed or weakly bound residues.…”