Morphology evolution effects on electrochemical activity of hierarchically stacking SnO2-Sb/TiO2-NTs electrode prepared by the hydrothermal method
- 11 Downloads
Distinct three-dimensional hierarchically stacking SnO2-Sb/TiO2-NTs electrode with a good-adhesion TiO2-NTs@SnO2-Sb interlayer, a compact plate SnO2-Sb middle layer, and an apparent uniform microsphere layer was successfully prepared through the hydrothermal method. The evolution of micro-morphology and structure of electrode catalyst layer was realized so as to improve the catalytic performance of electrode through tuning the hydrochloric acid concentration. Experimental results show that SnO2-Sb/TiO2-NTs electrode prepared in 0.5 mol L−1 HCl condition possesses the optimal performance containing a low phenol oxidation potential of 1.2 V (vs. SCE), and a maximum current density of 3.8 mA cm−2 towards phenol degradation in phosphate buffered solution. The electrochemical phenol removal results show that the phenol degradation process coincides with the first-order kinetics and the corresponding optimal constant reaches 14.2 × 10−3 min−1. The TOC removal efficiency of optimal electrode reaches 62%.
KeywordsSnO2-Sb/TiO2-NTs electrode Morphology evolution Hydrothermal method Hierarchically stacking Phenol degradation
- 7.Christensen PA, Zakaria K, Christensen H, Yonard T (2013) The effect of Ni and Sb oxide precursors, and of Ni composition, synthesis conditions and operating parameters on the activity, selectivity and durability of Sb-doped SnO2 anodes modified with Ni. J Electrochem Soc 160(8):H405–H413CrossRefGoogle Scholar
- 11.Xu H, Zhang Q, Yan W, Chu W (2011) A composite Sb-doped SnO2 electrode based on the TiO2 nanotubes prepared by hydrothermal synthesis. Int J Electrochem Sc 6:6639–6652Google Scholar
- 19.Harris D C (2007) Quantitative chemical analysis, 7th ed., W. H. Freeman and CompanyGoogle Scholar