Effect of Ag/ZnO-Graphitic Carbon Nitride on Antimicrobial Activity under Visible Light

Sirirat Rodmuang; Raweewan Plairaharn; Kanokwan Teingtum; Suntree Sangjan; Orawan  Chunhachart

doi:10.4028/www.scientific.net/KEM.858.116

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 858Effect of Ag/ZnO-Graphitic Carbon Nitride on...

Effect of Ag/ZnO-Graphitic Carbon Nitride on Antimicrobial Activity under Visible Light

Abstract:

Zinc oxide-graphitic carbon nitride (ZnO/g-C₃N₄) composites were synthesized by precipitation method in order to improve photocatalytic activity under visible light. To enhance antimicrobial activity, silver was added into zinc oxide-graphitic carbon nitride (Ag/ZnO/g-C₃N₄). Ultrastructures of the composite were analyzed by X-ray diffractometry (XRD) and transmission electron microscopy (TEM). Photocatalytic activity of the composites was carried out by degradation of methylene blue solution as a function of contact time. The results revealed that ZnO/g-C₃N₄ was capable of dye degradation at 96.65%. Addition of Ag into ZnO/g-C₃N₄ resulted in increase of dye reduction rate. For antibacterial test, Ag/ZnO/g-C₃N₄ exhibited bactericidal activity against Pseudomonas aeruginosa and Bacillus cereus. For antifungal test, Ag/ZnO/g-C₃N₄ showed resistance to Aspergillus niger for 7 days. Ag/ZnO-g-C₃N₄ composite exhibited better photocatalytic and antimicrobial activities compare to ZnO and g-C₃N₄. These results indicate that precipitation method is a cheap, rapid and efficient method that can be used to synthesize Ag/ZnO-g-C₃N₄ composites. For further studies, applications of this Ag/ZnO-g-C₃N₄ composites in microbiological and agricultural fields will be carried out.

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Periodical:

Key Engineering Materials (Volume 858)

Pages:

116-121

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.858.116

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Online since:

August 2020

Authors:

Sirirat Rodmuang, Raweewan Plairaharn, Kanokwan Teingtum, Suntree Sangjan, Orawan Chunhachart*

Keywords:

Ag/ZnO/g-C₃N₄, Antimicrobial Activity, Composite, Photocatalytic

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