One-Pot Synthesis of Ru-Doped ZnO Oxides for Photodegradation of 4-Chlorophenol

The photocatalytic degradation of 4-chlorophenol in water using Ru-doped ZnO mixed oxides (0, 0.5, 1, and 3 wt% RuO2) synthesized by the one-pot homogeneous coprecipitation method is reported. ZnO with wurtzite structure was present in the mixed oxide as corroborated by Raman spectroscopy and X-ray...

Full description

Saved in:
Bibliographic Details
Published in:International journal of photoenergy 2018-01, Vol.2018 (2018), p.1-12
Main Authors: Ye, Liqun, Xie, Haiquan, Hernández Cortez, José G., Reza, Carmen, González-García, Julio, Salmones, Jose, Chen, Lifang, Wang, Jin An, Noreña, Luis Enrique, Manríquez, Maria E., Tzompantzi, Francisco
Format: Article
Language:English
Subjects:
Adsorption
Applied physics
Catalysis
Charge transfer
Chlorophenol
Energy gap
Fluorescence
Free radicals
Holes (electron deficiencies)
Investigations
Lasers
Mixed oxides
Nanoparticles
Nanorods
Oxidation
Photocatalysis
Photodegradation
Physical chemistry
Raman spectroscopy
Ruthenium oxide
Scanning electron microscopy
Ultraviolet radiation
Wurtzite
X ray spectra
X-ray diffraction
Zinc oxide
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:The photocatalytic degradation of 4-chlorophenol in water using Ru-doped ZnO mixed oxides (0, 0.5, 1, and 3 wt% RuO2) synthesized by the one-pot homogeneous coprecipitation method is reported. ZnO with wurtzite structure was present in the mixed oxide as corroborated by Raman spectroscopy and X-ray diffraction analysis. All the samples showed nanorod morphological features. The presence of Ru6+/Ru4+ couples on ZnO modified the band gap of the mixed oxides and led to a shift of the band gap energy from 3.20 eV to 3.07 eV. Ru addition increased the surface area and significantly promoted the formation of active surface oxygen species such as hydroradicals evidenced by the fluorescence spectroscopy measurement. In the photodegradation of 4-chlorophenol solution under UV irradiation, a notable increase in photoactivity was obtained as the amount of RuO2 in the mixed oxides increased to 3 wt%. The charge transfer between Ru6+/Ru4+ couples and ZnO nanoparticles together with the formation of free radical oxidant species effectively inhibits electron-hole recombination rate, thus favoring the photodegradation of 4-chlorophenol.
ISSN:1110-662X
1687-529X
DOI:10.1155/2018/7605306