Nadeem, Qurat Ul Ain, Nadeem, Zoobia, Gill, Rohama and Shchukin, Dmitry G 
ORCID: 0000-0002-2936-804X
(2022)
Multifunctional ZnO-Co3O4 @ polymer hybrid nanocoatings with controlled adsorption, photocatalytic and anti-microbial functions for polluted water systems.
Environmental Science and Pollution Research, 29 (31).
pp. 46737-46750.
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Abstract
Triple action pollutant responsive multi-layer hybrid nanocoatings of architecture PEI(PAA/ZnO-Co<sub>3</sub>O<sub>4</sub>)<sub>n</sub> were constructed through ZnO-Co<sub>3</sub>O<sub>4</sub> binary oxide co-precipitation followed by its inclusion in multi-layer polymeric thin films using Layer-by-Layer (LbL) deposition. Characterization of the designed architecture was carried out via FTIR, XRD, UV-Vis, and Raman spectroscopic studies to evaluate the chemical nature, bonding, and crystallographic behavior of ZnO-Co<sub>3</sub>O<sub>4</sub>. Peaks of ZnO-Co<sub>3</sub>O<sub>4</sub> were recorded at 586.38, 486.08, and 443.64 cm<sup>-1</sup> while pronounced shifting of ZnO characteristic E<sub>2</sub> (high) peak ~ 450 cm<sup>-1</sup> and appearance of modes around 495, 530, 630, and 719 cm<sup>-1</sup> indexed via Raman studies validated Co<sub>3</sub>O<sub>4</sub> impregnation into ZnO structure. XRD patterns of ZnO-Co<sub>3</sub>O<sub>4</sub> compared to their previously reported pristine structures also justified the formation of binary oxide as unit composite. SEM micrographs confirmed homogenous multi-layered depositions while EDX analysis confirmed their uniform elemental distribution in the unit structure. Sequential multi-layer buildup up to 48 layer pairs was monitored using ellipsometry with maximum film thickness ~ 89 nm and by UV-Vis at 376 nm. The prepared thin films exhibited significant photodegradation of methylene blue ~ 91% and Cu (II) adsorption capacity ~ 89% within first 90 min of contact, along with prominent bactericidal efficiency against E. coli within 24 h of reaction time. FAAS, ICP-OES, and UV-Vis spectroscopy analyses make these multifunctional hybrid nanocoatings promising for industrial wastewater as well as drinking water purification setups. Furthermore, protuberant recycling and regenerative capacity make these hybrid nanocoatings an eco-friendly system for hydro-remediation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Hybrid nanocoatings, LbL deposition, Wastewater treatment, Adsorption, ICP-OES, Reusable thin films |
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 13 Dec 2023 09:44 |
| Last Modified: | 13 Dec 2023 09:45 |
| DOI: | 10.1007/s11356-022-18722-0 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3154562 |
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