| Synthesis and Charcterization of Coupled ZnO/SnO2
Photocatalysts and Their Activity towards
Degradation of Cibacron Red Dye |
Naveen Verma,1,* Suprabha Yadav,1 Bernabe Marí,2 Anuj Mittal1 and Jitender Jindal1
Pages : 1-7
DOI : 10.1080/0371750X.2017.1417059 |
| Abstract |
| A series of coupled ZnO-SnO2 photocatalyst was successfully synthesized in the Zn:Sn
molar ratio of 20:1, 10:1, 5:1 and 2:1 via co-precipitation method followed by calcination
at different temperatures. The synthesized materials were characterized by X-ray
diffraction, diffuse reflectance spectra, scanning electron microscope and transmission
electron microscope. Photocatalytic activitiy of synthesized materials was applied for
the degradation of cibacron red dye in aqueous solution under UV-A light irradiation.
Experimental results revealed that the coupled ZnO-SnO2 photocatalyst with Zn:Sn molar
ratio 10:1, calcined at 600oC for 1 h was the most efficient photocatalyst among synthesized
samples for the degradation of cibacron red. Superoxide anion radical (•O2
–) was found
to be the prominent active species responsible for degradation comparative to hole (h+),
hydroxyl radical (•OH).
[Keywords: Coupled, Co-precipitation, Photocatalysis] |
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