article · ACS Omega
A porous nanocomposite coupling n-type zinc oxide with p-type manganese(III) oxide was synthesised using poly(vinyl alcohol) assistance through sol-gel and self-propagation methods. Physical characterisation confirmed that the resulting material possessed improved surface area, porosity, and charge transfer capability compared to zinc oxide alone, with particle sizes ranging from 15 to 60 nanometres. These enhanced charge transfer properties were demonstrated through the effective degradation of acid orange-8 dye. In antibacterial evaluations against Escherichia coli, the material demonstrated inhibitory effects, with an uncalcined composite achieving a 14-millimetre zone of inhibition, higher than poly(vinyl alcohol) alone, while the calcined composite produced an even larger inhibition zone.
Water contamination from synthetic industrial dyes and microbial pathogens represents a significant challenge for environmental sanitation and public health. Developing multifunctional nanomaterials that can break down hazardous chemical pollutants while simultaneously controlling harmful bacteria like Escherichia coli provides an integrated approach to advancing wastewater treatment and sanitisation technologies.
This work could enable dual-action water treatment materials capable of degrading industrial textile dyes and suppressing bacterial contaminants. Potential users include industrial effluent treatment facilities and environmental remediation operators. The technology is in an early-stage research phase, having undergone preliminary laboratory testing on a single dye and bacterial strain, with further electrochemical investigation required prior to scaling.
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High Resolution Image Download MS PowerPoint Slide Zinc oxide is one of the novel metal oxides utilized for diverse applications. The sol–gel and unintended self-propagation procedures were applied to synthesize the porous and high surface area ZnO-based metal oxide nanocomposite. The p-type manganese(III) oxide was successfully coupled with n-type ZnO . The physical property characterization results revealed the surface area, porosity, and charge transfer capability improvement on the poly(vinyl alcohol) (PVA)-aided binary nanocomposite (PVA-ZnO/Mn 2 O 3 ), compared to ZnO. The XRD patterns and TEM image analysis validated the nanometer size range for the materials (15–60 nm). The SEM micrographs and BET spectral details have confirmed the porous nature of the PVA-ZnO/Mn 2 O 3 nanocomposite. The supporting results were obtained from the HRTEM (IFFT) and SAED pattern analyses. The EDX and HRTEM analyses were used for the confirmation of elemental composition and reality of the PVA-ZnO/Mn 2 O 3 composite, respectively. The presence of the improved charge transfer property for PVA-ZnO/Mn 2 O 3, compared to ZnO, was evidenced from acid orange-8 dye degradation. The highest zone of inhibition (14 mm) was recorded on Escherichia coli bacteria for the uncalcined PVA-ZnO/Mn 2 O 3 nanocomposite compared to PVA, yet, less zone of inhibition compared to the calcined PVA-ZnO/Mn 2 O 3 nanocomposite. The authors recommend the formation of the couple between metal oxides by electrochemical technique analyses as a future work.
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DOI: 10.1021/acsomega.0c05597
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