Ketoprofen degradation by surface reactive species on TiO2, AgxOy/MoxOy/catalysts

[Display omitted] •The wet impregnation method was employed for the TiO2 functionalization with AgNPs.•XPS data indicates the presence of Ti, Ag, Mo, and O on the TiO2-4Ag-0.2Mo surface.•The degradation and mineralization were better at the lowest catalyst concentration.•At natural pH, the catalyst...

Full description

Saved in:
Bibliographic Details
Published in:Materials letters 2021-07, Vol.294, p.129687, Article 129687
Main Authors: Suárez-Escobar, Andrés, Rodríguez-González, Vicente, Gallardo-Vega, Carlos, Sarria, Edwin, Clavijo, Lorena
Format: Article
Language:English
Subjects:
Bimetals
Catalysts
Chemical synthesis
Degradation
Emerging contaminants
Ketoprofen
Materials science
Mineralization
Mo and Ag surface species
Nanocomposites
Organic carbon
Pharmaceutical wastewater
Photoelectrons
Silver
TiO2 functionalized catalyst
Titanium dioxide
Wastewater
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •The wet impregnation method was employed for the TiO2 functionalization with AgNPs.•XPS data indicates the presence of Ti, Ag, Mo, and O on the TiO2-4Ag-0.2Mo surface.•The degradation and mineralization were better at the lowest catalyst concentration.•At natural pH, the catalyst concentration of 0.5% led to mineralization of 45% and removal of 66%. In this research, the surface functionalization of TiO2 by silver and molybdenum species was used for the degradation and mineralization of ketoprofen. The catalyst was synthesized by a controlled wet impregnation method and characterized by several techniques; mineralization and degradation were quantified with HPLC and TOC (Total Organic Carbon) achieving more than 40 and 60% according to the pH. The higher removal using bimetallic synthesized catalyst compared with P25 TiO2 is due to the surface species, Ag, Ag+, MoO3, and Mo5+ that decrease the bandgap energy that inhibit the recombination of photoelectrons and charge separation. The as-synthetized nanocomposites stand as an alternative for the non-steroidal-anti-inflammatory drug commonly found in wastewater.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.129687