Pseudo-SILAR assisted unique synthesis of ZnO/Ag2O nanocomposites for improved photocatalytic and antibacterial performance without cytotoxic effect
- Authors
- Ahmad, Muneeb; Zaidi, Syed Jazib Abbas; Zoha, Summal; Khan, Muhammad Saad; Shahid, Muhammad; Park, Tae Joo; Basit, Muhammad Abdul
- Issue Date
- Oct-2020
- Publisher
- Elsevier BV
- Keywords
- p-SILAR; ZnO; Ag2O; Antibacterial activity; E. coli; B. subtilis; HepG2
- Citation
- Colloids and Surfaces A: Physicochemical and Engineering Aspects, v.603, pp.1 - 10
- Indexed
- SCIE
SCOPUS
- Journal Title
- Colloids and Surfaces A: Physicochemical and Engineering Aspects
- Volume
- 603
- Start Page
- 1
- End Page
- 10
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/808
- DOI
- 10.1016/j.colsurfa.2020.125200
- ISSN
- 0927-7757
- Abstract
- The combination of silver (I) oxide (Ag2O) with zinc oxide (ZnO) evolves the magnificent response of composite for antimicrobial and photocatalytic applications concomitantly. A novel, cost-effective and facile wet-chemical recipe for developing ZnO/Ag2O nanocomposites is realized by customizing pseudo-successive ionic layer adsorption and reaction (p-SILAR) process. Quantitatively as well as qualitatively controlled Ag2O was deposited on flower-like ZnO, termed as ZnO NFs, by carrying out 1-4 cycles of customized p-SILAR. It was affirmed that the cationic adsorption of Ag+ from AgNO3 solution instigates the formation of Ag2O over ZnO NFs via a simple heat-treatment process. Followed by the customary material characterizations including SEM, TEM, XPS etc., the ZnO/Ag2O nanocomposites were tested for controlling the toxic organic dye (Rhodamine B) and harmful bacterial species i.e. E. coli and B. subtilis. A significant increase in the photocatalytic performance of ZnO NFs under ultra-violet (UV) as well as visible (vis) irradiation was obtained by incorporating 2 cycles of Ag2O deposition. Consequently, the degradation rate constant of optimal ZnO/Ag2O-2C was increased to 0.1077 and 0.0104 from 0.0235 and 0.0011 min(-1), under UV and vis light respectively. Similarly, ZnO/Ag2O evolved a significant increase in the inhibition zones without exhibiting a considerable decrease in the cell viability of HepG2, which further avowed the bio-compatibility of ZnO NFs having Ag2O.
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