Photocatalytic Activity Inhibition by ZnO-SiO2 Nanocomposites Synthesized by Sonochemical Method

Widiyastuti Widiyastuti; Iva Maula; Siti Machmudah; Tantular Nurtono; Sugeng Winardi; Kikuo Okuyama

doi:10.4028/www.scientific.net/AMR.1112.209

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1112Photocatalytic Activity Inhibition by ZnO-SiO2...

Photocatalytic Activity Inhibition by ZnO-SiO₂ Nanocomposites Synthesized by Sonochemical Method

Abstract:

Here, ZnO particles and ZnO-SiO₂ nanocomposites synthesized by sonochemical method under continuous ultrasound irradiation were reported. For an hour ultrasound irradiated by ultrasonic horn at atmospheric condition, nanorods and spherical structures with crystalline sizes 33 and 17 nm were obtained for ZnO and ZnO-SiO₂, respectively, revealed that silica inhibited the particles and crystal growth. FTIR analysis also indicated that silica covered the ZnO particles. In addition, photocatalytic activity was also inhibited by silica in which ZnO without and with silica had degradation rate 69% and 48%, respectively, to degrade methylene blue solution under direct sunlight irradiation for an hour. The addition of SiO₂ to ZnO gives an advantage in some application to avoid excessive degradation by controlling their photocatalytic activity.

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Advanced Materials Research (Volume 1112)

Pages:

209-212

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1112.209

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Online since:

July 2015

Authors:

Widiyastuti Widiyastuti*, Iva Maula, Siti Machmudah, Tantular Nurtono, Sugeng Winardi, Kikuo Okuyama

Keywords:

Photodegradation Reaction, Ultrasound irradiation, Zinc Oxide Nanoparticles, Zinc Oxide-Silica Nanocomposites

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