Exploration of photocatalytic properties of microbially designed silver nanoparticles on Victoria blue B (original) (raw)
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Current Research in Green and Sustainable Chemistry, 2021
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Microbial Synthesized Silver Nanoparticles for Decolorization and Biodegradation of Azo Dye Compound
Journal of Environmental Nanotechnology, 2015
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Philippine Science Letters, 2020
Annually, large volumes of synthetic textile dyes are released in effluent into natural streams causing damage to human health and environment. Conventional methods have been proven inefficient due to the stability of these dyes. An alternative emerging approach is the use of nanocatalysts in photocatalytic dye degradation. In this study, the ability of citrate-stabilized silver nanoparticles (cit-AgNP) to degrade methylene blue (MB) dye was investigated. Cit-AgNP was successfully synthesized using chemical reduction method and stabilized by sodium citrate. The resulting solution was yellow in color with absorbance peak at 393 nm. The particles were spherical in shape with average diameter of 9.19 ± 4.91 nm. In the degradation study, the photocatalytic degradation of MB is visually manifested by its reduction in color when exposed to light and the eventual reduction in absorbance at peak 663 nm. The percent degradation was quantified by calculating the amount of MB that remained in the solution and showed 94.45% after 10 minutes of exposure to light. Four different setups were also compared and analyzed based on color changes, absorbance curve profiles, and percent degradation to prove the catalytic activity of cit-AgNP and it was found out that the highest and fastest degradation was the setup with MB, NaBH4, and cit-AgNP. River water samples were also utilized to evaluate the effectivity of degradation in real water applications. It has showed no significant difference compared to the setup prepared with distilled water after statistical tests. Hence, this study showed the potential of cit-AgNP for dye degradation.