Effect of the Mole Ratios of Zn2+:OH- on the Morphologies and Photocatalytic Activities of Ag/ZnO Photocatalysts

Pongsaton Amornpitoksuk; Sumetha Suwanboon

doi:10.4028/www.scientific.net/AMR.979.180

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 979Effect of the Mole Ratios of Zn2+:OH- on the...

Effect of the Mole Ratios of Zn²⁺:OH^- on the Morphologies and Photocatalytic Activities of Ag/ZnO Photocatalysts

Abstract:

Ag/ZnO powders were synthesized through hydrolysis of Zn²⁺ in an alkaline solution at various mole ratios of Zn²⁺:OH^- without any stabilizer. At a mole ratio of Zn²⁺:OH^- = 1:1.5, the ZnO particles showed as bi-hexagonal prisms. At higher OH^- concentrations, the shape became spherical and then finally transformed to an agglomeration of platelet like-shapes at mole ratios of Zn²⁺:OH^- = 1:5. The photocatalytic activity was investigated through degradation of a methylene blue solution. Under irradiation from blacklight fluorescence tubes, ZnO prepared from Zn²⁺:OH^- = 1:1.5 was the best photocatalyst compared with those prepared from different mole ratios of Zn²⁺:OH^-. This could be due to a high area of hexagonal facets as represented by the (0002) plane. By varying the amount of added Ag between 1-5 mol%, the ZnO prepared from 3 mol% of Ag showed the highest efficiency for photocatalytic degradation of methylene blue and its activity was also better than for pure ZnO.

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Periodical:

Advanced Materials Research (Volume 979)

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180-183

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https://doi.org/10.4028/www.scientific.net/AMR.979.180

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Online since:

June 2014

Authors:

Pongsaton Amornpitoksuk*, Sumetha Suwanboon

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Photocatalyst, Silver, ZNO

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