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Enhanced photo(electro)catalytic properties of ZnO particles synthesized by CTAB-assisted microwave processing

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2018
PC_2018_237-240.pdf (648.2Kb)
Authors
Marković, Smilja
Stojković Simatović, Ivana
Ahmetović, Sanita
Veselinović, Ljiljana
Stojadinović, Stevan
Rac, Vladislav
Škapin, Srečo Davor
Uskoković, Dragan
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Abstract
ZnO/CTAB powder was prepared by microwave processing of a precipitate with the aid of cetyltrimethylammonium bromide (CTAB). The effects of CTAB on the crystal structure, morphology, optical and photo(electro)catalytic properties of ZnO particles were studied. The results showed that CTAB did not influenced crystal structure or phase purity of ZnO. However, even low concentration of CTAB vary particles morphology; cone-like particles were prepared by processing without CTAB, while a mixture of spheroidal and plate-like ZnO particles were produced when 0.001 M CTAB was used. It was found that synthesized ZnO powders have 0.10 eV lower band gap energy then bulk ZnO (3.37 eV). A high photocatalytic activity for decolorization of methylene blue water solution was established after 2 h of sunlight irradiation; efficiency was 100 and 67% for ZnO/CTAB and ZnO, respectively. Electrochemical test showed faster oxygen evolution kinetics when ZnO/CTAB was used as anode material. Enhanced photo(el...ectro)catalytic activities of ZnO/CTAB particles are attributed to better absorption of visible light due to both, larger dimensions and surface sensitization by CTAB.

Keywords:
ZnO powders / CTAB / microwave processing / photocatalytic activity
Source:
Physical Chemistry 2018 : proceedings. Vol. 1 / 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 24-28, 2018, Belgrade, 2018, 237-240
Publisher:
  • Belgrade : Society of Physical Chemists of Serbia
Projects:
  • Molecular designing of nanoparticles with controlled morphological and physicochemical characteristics and functional materials based on them (RS-45004)

ISBN: 978-86-82475-36-1

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URI
http://dais.sanu.ac.rs/123456789/4561
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  • ITN SANU - Opšta kolekcija / ITS SASA - General collection
Institution
Институт техничких наука САНУ / Institute of Technical Sciences SASA

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