HF-based surface modification for enhanced photobiological and photochemical performance of ZnO and ZnO/CdS hierarchical structures
- Authors
- Naeem, Hafiz Muhammad; Ijaz, Sana; Abbas, Muhammad Hassan; Ahmed, Yusra; Rehman, Nagina; Park, Tae Joo; Basit, Muhammad Abdul
- Issue Date
- Sep-2020
- Publisher
- Elsevier BV
- Keywords
- ZnO; CdS; HF; Hierarchical; Photocatalysis; E coli
- Citation
- Materials Chemistry and Physics, v.252, pp.1 - 9
- Indexed
- SCIE
SCOPUS
- Journal Title
- Materials Chemistry and Physics
- Volume
- 252
- Start Page
- 1
- End Page
- 9
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/884
- DOI
- 10.1016/j.matchemphys.2020.123190
- ISSN
- 0254-0584
- Abstract
- In this work, we modified the conventional wet chemical route used for synthesis of ZnO hierarchical structure (HS), and successfully obtained superior optical, photochemical and antimicrobial characteristics for ZnO-HS as a consequence of incorporation of hydrofluoric acid (HF). ZnO-HS is unique owing to its morphology with 2D interconnected nanosheets. Strategic use of HF led to appreciable reduction in sheet thickness (up to-15 nm) of ZnO-HS while physicochemical attachment of Fluorine (F) was also realized. Antimicrobial activity of ZnO-HS against Escherichia coli was measured via pour plate method, and found to be significantly increased as a consequence of HF-based modification of ZnO-HS. In addition, resultant ZnO-HS exhibited higher deposition of CdS quantum-dots via pseudo-successive ionic layer adsorption and reaction (p-SILAR), affirming higher photocatalytic performance of ZnO/CdS hierarchical composite (HC). It was established that congo red (CR) dye was degraded-15% more, when ZnO/CdS HC incorporating HF-based surface modification was used as a photo catalyst. Characteristic improvements in ZnO-HS were affirmed using diffuse reflectance spectroscopy, FTIR spectroscopy and SEM.
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