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access icon free Carpogenic ZnO nanoparticles: amplified nanophotocatalytic and antimicrobial action

© The Institution of Engineering and Technology
Received 09/03/2018, Accepted 03/09/2018, Revised 31/08/2018, Published 07/09/2018

This investigation has for the first time utilised environmental resource Prunus cerasifera seed extract phytochemicals for the green synthesis of carpogenic ZnO nanoparticles (NPs). Spherical morphology and size range of 56.57–107.70 nm at variable calcination temperatures without the use of any external reducing agent was obtained. The synthesised NPs exhibited hexagonal wurtzite geometry with an average crystal size 5.62 nm and a band gap of 3.4 eV. Carpogenic NPs were investigated for optical, compositional, morphological, and phytochemical make up via ultraviolet spectroscopy (UV–Vis), Fourier transform infrared analysis, X-ray powder diffraction, scanning electron microscopy, and gas chromatography and mass spectrometry. Carpogenic NPs degraded methyl red up to 83% with pseudo-first-order degradation kinetics (R 2 = 0.88) in 18 min signifying their remediation role in environment in conformity with all principles of green chemistry. Photocatalytic assays were performed in direct solar irradiance. Nine pathogens of biomedical and agricultural significance having multi-drug resistance were inhibited in vitro via the Kirby–Bauer disc diffusion assay. The enhanced photocatalytic and antimicrobial inhibition not only makes carpogenic ZnO NPs a future photo-degradative candidate for environmental remediation but also a nanofertiliser, nanofungicide, and nanobactericide synthesised via bioinspired, biomimetic, green, and unprecedented route.

Inspec keywords: catalysis; infrared spectra; ultraviolet spectra; zinc compounds; photochemistry; X-ray diffraction; biomimetics; nanocomposites; nanofabrication; Fourier transform spectra; scanning electron microscopy; transmission electron microscopy; microorganisms; nanobiotechnology; calcination; visible spectra; antibacterial activity; nanoparticles; chromatography

Other keywords: green chemistry; Aspergillus flavus; time 18.0 min; carpogenic nanoparticles; nanophotocatalytic action; hexagonal wurtzite geometry; size 56.57 nm to 107.7 nm; X-ray powder diffraction; photocatalytic inhibition; phytochemicals; antimicrobial action; mass spectrometry; variable calcination temperatures; green synthesis; size 5.62 nm; antimicrobial inhibition; Aspergillus niger; prunus cerasifera seed; Aspergillus terreus; environmental remediation; electron volt energy 3.4 eV; pseudofirst-order degradation kinetics; gas chromatography; ZnO; environmental resource

Subjects: Biotechnology industry; Heat treatment; Environmental issues; Industrial processes; Engineering materials; Nanotechnology industry; Nanofabrication

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