Preparation of a PbO2 Electrode with Graphene Interlayer and for Electrochemical Oxidation of Doxycycline
Open Access
- 1 May 2020
- journal article
- research article
- Published by Elsevier BV in International Journal of Electrochemical Science
- Vol. 15 (5), 4352-4367
- https://doi.org/10.20964/2020.05.16
Abstract
A graphene interlayer was introduced into a Ti/SnO2-Sb2O3/PbO2 electrode by electrophoretic deposition and electro position methods to form a Ti/SnO2-Sb2O3/graphene/PbO2 electrode (G/PbO2). In comparison to the Ti/SnO2-Sb2O3/PbO2 electrode (PbO2), the surface of the G/PbO2 electrode was flat with fewer surface cracks, and smaller crystal sizes. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results showed that the G/PbO2 electrode had a large electrochemically active surface area and more active sites. The accelerated lifetime of the G/PbO2 electrode was 72 h, which was longer than that of the PbO2 electrode (40 h). In addition, the graphene interlayer improved the ability to generate OH center dot. The real electrochemical oxidation abilities of the G/PbO2 and PbO2 electrodes were also studied using doxycycline (DC) as a model pollutant. After 150 min of electrolysis, the DC, total organic carbon (TOC) removal rate and instantaneous current efficiency (ICE) of the G/PbO2 electrode were 98.5%, 32.3% and 1.80%, respectively, which was higher than those of the PbO2 electrode (93.6%, 28.7% and 1.60%, respectively). Furthermore, six intermediate products were identified based on HPLC-MS, and oxidation pathways were proposed.Keywords
This publication has 40 references indexed in Scilit:
- Electrochemical degradation of chloramphenicol with a novel Al doped PbO2 electrode: Performance, kinetics and degradation mechanismElectrochimica Acta, 2015
- Doxycycline Degradation by the Oxidative Fenton ProcessJournal of Chemistry, 2015
- Study on the performance of an improved Ti/SnO2–Sb2O3/PbO2 based on porous titanium substrate compared with planar titanium substrateRSC Advances, 2015
- Preparation and characterization of carbon nanotube and Bi co-doped PbO2 electrodeJournal of the Taiwan Institute of Chemical Engineers, 2014
- Preparation of Ti/SnO2-Sb electrodes modified by carbon nanotube for anodic oxidation of dye wastewater and combination with nanofiltrationElectrochimica Acta, 2014
- Electrochemical mineralization of sulfamethoxazole by Ti/SnO2-Sb/Ce-PbO2 anode: Kinetics, reaction pathways, and energy cost evolutionElectrochimica Acta, 2013
- Monitoring release of pharmaceutical compounds: Occurrence and environmental risk assessment of two WWTP effluents and their receiving bodies in the Po Valley, ItalyScience of The Total Environment, 2012
- Pharmaceutical and personal care products in groundwater, subsurface drainage, soil, and wheat grain, following a high single application of municipal biosolids to a fieldChemosphere, 2012
- Electrochemical oxidation of tetracycline antibiotics using a Ti/IrO2 anode for wastewater treatment of animal husbandryWater Science & Technology, 2011
- Electrodeposition of lead dioxide from methanesulfonate solutionsJournal of Power Sources, 2009