6533b85bfe1ef96bd12baab4

RESEARCH PRODUCT

Photoelectrochemical removal of chlorfenvinphos by using WO3 nanorods: Influence of annealing temperature and operation pH

G. Roselló-márquezB. Lucas-granadosRita Sánchez-tovarJosé García-antónR.m. Fernández-domene

subject

Materials scienceAnnealing (metallurgy)Regression modelKineticschemistry.chemical_elementFiltration and Separation02 engineering and technologyThermal treatmentTungstenINGENIERIA QUIMICAAnalytical Chemistrychemistry.chemical_compound020401 chemical engineeringPhotoelectrochemical degradationWO3 nanorods0204 chemical engineeringAnodizingNanotecnologiaChlorfenvinphosChlorfenvinphos021001 nanoscience & nanotechnologyElectroquímicaChemical engineeringchemistryElectrodeNanorodAnodization0210 nano-technology

description

[EN] A visible-light driven photoelectrochemical degradation process has been applied to a solution polluted with the organophosphate insecticide chlorfenvinphos. Different WO3 nanosheets/nanorods have been used as photoanodes. These nanostructured electrodes have been fabricated by anodization of tungsten and, subsequently, they have been subjected to a thermal treatment (annealing). The combined influence of annealing temperature (400¿°C and 600¿°C) and operation pH (1 and 3) on the photoelectrocatalytic behavior of these nanorods has been examined through a statistical analysis. Morphological, structural and photoelectrochemical characterizations have also been carried out. The chlorfenvinphos degradation efficiency depended both on annealing temperature and, specially, operation pH. At pH 1 and using an annealing temperature of 600¿°C, chlorfenvinphos has been effectively degraded following pseudo-first order kinetics with a coefficient of 7.8¿×¿10¿3¿min¿1, and notably mineralized (more than 65% of Total Organic Carbon decrease).

yearjournalcountryeditionlanguage
2019-04-01
10.1016/j.seppur.2018.11.049https://hdl.handle.net/10550/77021