Ir/Pt Modified Ti/Sno2+Ruo2 Electrode: Preparation and Highly Efficient Electrocatalytic Degradation of Tetrahydrofurfuryl Alcohol

Abstract

Abstract: As a potentially exceedingly hazardous chemical pollutant, tetrahydrofurfuryl alcohol wastewater, so far there is no literature on degradation of related wastewater.  In this work, we have constructed a novel Ir/Pt modified Ti/SnO2+RuO2 electrode as anode for the efficient electrocatalytic degradation of tetrahydrofurfuryl alcohol (THFA) wastewater.  Scanning electron microscopy and X-ray diffraction are used to investigate the morphology, surface appearance and compositions of Ir/Pt modified Ti/SnO2+RuO2 electrode.  The experimental results show that the prepared Ir/Pt modified Ti/SnO2+RuO2 electrode possesses excellent catalytic activity and electrochemical stability.  The effects on the removal rate are investigated through three parameters: pH, electrolyte concentration and current density.  The optimal degradation conditions of THFA (electrolyte concentration of 6 g L-1, pH 5 and current density of 24 mA cm-2) are obtained after optimizing the terms by single-factor experiments.  After 4 h, the highest chemical oxygen demand removal rate of THFA is 60.52% under optimal conditions.  In addition, the intermediates of tetrahydrofurfuryl alcohol degradation are analyzed by LC-MS and the reaction pathways are proposed.  Finally, kinetic analysis shows that electrocatalytic degradation of THFA follows the first-order kinetic law.  This study opens an evolutive direction for the degradation of tetrahydrofurfuryl alcohol wastewater.

Keywords: Keywords: Electrocatalytic degradation, Tetrahydrofurfuryl alcohol wastewater, Ir/Pt modified Ti/SnO2+RuO2 electrode, Degradation kinetic