Use of Vegetable Waste Extracts for Controlling Microstructure of CuO Nanoparticles: Green Synthesis, Characterization, and Photocatalytic Applications

Ullah, Hameed; Ullah, Zia; Fazal, Aliya; Irfan, Muhammad

doi:10.1155/2017/2721798

Cited by 28 publications

(7 citation statements)

References 20 publications

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“…Therefore, considerable attention has been focused on the photocatalytic purification of wastewater using semiconductor nanomaterials and the latest advancements of biogenic MONPs are listed in Table 1. Biogenic MONPs are considered as good photocatalysts due to their high photocatalytic efficiency, high physical and chemical stabilities, economic viability, nontoxicity, and cost-effectiveness [14,15,23,24,74,75].…”

Section: Photocatalytic Activity Of the Biosynthesized Zno Npsmentioning

confidence: 99%

Green Synthesis, Structural Characterization and Photocatalytic Applications of ZnO Nanoconjugates Using Heliotropium indicum

Wijesinghe¹,

Thiripuranathar²,

Menaa

et al. 2021

Catalysts

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In recent years, biosynthesized zinc oxide nanoparticles (ZnO NPs) have been gaining importance due to their unique properties and tremendous applications. This study aimed to fabricate ZnO NPs by using extracts from various parts of the traditional medicinal plant Heliotropium indicum (H. indicum) and evaluate their photocatalytic activity. Further, their potential in photoluminescence and fluorescence resonance energy transfer (FRET) was assessed. The Ultraviolet-Visible spectrum exhibited a hypsochromic shifted absorption band between 350–380 nm. Transmission electron microscopy (TEM) analysis revealed spherical NPs, while X-ray diffraction (XRD) data revealed wurtzite, hexagonal and crystalline nature. The TEM and XRD consistently determined an average particle size range from 19 to 53 nm. The photocatalytic degradation reaches a maximum of 95% for biogenic ZnO NPs by monitoring spectrophotometrically the degradation of methylene blue dye (λmax = 662.8 nm) under solar irradiation. Photoluminescence analysis revealed differentiated spectra with high-intensity emission peaks for biogenic ZnO NPs compared with chemically synthesized ZnO NPs. Eventually, the highest efficiency of FRET (80%) was found in ZnO NPs synthesized from the leaves. This remains the first report highlighting the multifunctional ZnO NPs capabilities mediated by using H. indicum, which could lead to important potential environmental and biomedical applications.

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Section: Photocatalytic Activity Of the Biosynthesized Zno Npsmentioning

confidence: 99%

Green Synthesis, Structural Characterization and Photocatalytic Applications of ZnO Nanoconjugates Using Heliotropium indicum

Wijesinghe¹,

Thiripuranathar²,

Menaa

et al. 2021

Catalysts

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“…These NPs were found to be useful for the synthesis of propargylamines in moderate yield. Vegetable peels have also been used for the synthesis of CuO-NPs [84]. Cauliflower (Brassica oleracea), potato (Solanum tuberosum) and pea (Pisum sativum) peel extracts yield CuO-NPs from CuCl 2.…”

Section: Cuo-npsmentioning

confidence: 99%

Current status of plant metabolite-based fabrication of copper/copper oxide nanoparticles and their applications: a review

2020

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Since green mode of nanoparticles (NPs) synthesis is simple, advantageous and environment friendly relative to chemical and physical procedures, various plant species have been used to fabricate copper and copper oxide nanoparticles (Cu/CuO-NPs) owing to the presence of phytochemicals which often act as capping as well as stabilizing agent. These Cu/CuO-NPs are highly stable and used in the degradation of organic dyes like methylene blue and reduction of organic compounds such as phenols. They are also used as antibacterial, antioxidant and antifungal agent due to their cytotoxicity. They are also examined for agricultural crops growth and productivity. Cu-NPs increased the root and shoot growth of mung bean. In wheat plants, these particles reduced shoot growth; and enhanced the grain yield and stress tolerance through starch degradation. Similarly, CuO-NPs treated seedlings have shown reduced chlorophyll, carotenoid and sugar content, whereas proline and anthocyanins were increased in Brassica rapa seedlings. Overall, this review presents the recent understanding of plant-mediated Cu and CuO-NPs fabrication and their application in biomedicine, environmental remediation and agricultural practices. A comparison of the traditional/conventional method of fabrication of NPs with those of green protocols has also been made. Some misconception of copper chemistry has also been critically discussed in terms of oxidation and reduction reactions.

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“…The extracts of the vegetable wastes were prepared by a simple method following a reported procedure [16]. In a typical preparation protocol, we have taken 50 g of the vegetable waste, which was washed thoroughly with deionised water.…”

Section: Synthesis Of Nio Nanostructuresmentioning

confidence: 99%

Cost effective green synthesis of NiO nanostructures as highly efficient photocatalysts for degradation of organic dyes

Ullah

Mushtaq

Ullah

et al. 2019

Micro & Nano Letters

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Here, the cost effective green synthesis of nickel oxide (NiO) nanostructures has been reported. The organic capping and/or reducing agents were obtained by extraction from wastes of three different vegetables (cauliflower, potatoes and peas). The extracts of cauliflower and peas peels gave nanowhiskers while the extract of potato peels gave nanorods of NiO, as confirmed by scanning electron microscopy. X-ray diffraction analyses demonstrated the nanocrystalline cubic phase of NiO in all the samples. However, crystallite size varied with the extract of vegetable waste used. Fourier transform infrared analysis helps in identifying different vibrations, particularly Ni-O stretching vibrations, and diffuse reflectance spectra analyses led to the establishment of bandgap energies. The resulting NiO nanostructures were tested for their efficiencies as photocatalysts for Methylene blue degradation. All the three samples have shown significant photocatalytic activities. The exploration in this study clearly demonstrates the very high photocatalytic activities of the synthesised NiO nanostructures, which can be used as competent agents for treatment of wastewater to remove toxic dyes.

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Use of Vegetable Waste Extracts for Controlling Microstructure of CuO Nanoparticles: Green Synthesis, Characterization, and Photocatalytic Applications

Cited by 28 publications

References 20 publications

Green Synthesis, Structural Characterization and Photocatalytic Applications of ZnO Nanoconjugates Using Heliotropium indicum

Green Synthesis, Structural Characterization and Photocatalytic Applications of ZnO Nanoconjugates Using Heliotropium indicum

Current status of plant metabolite-based fabrication of copper/copper oxide nanoparticles and their applications: a review

Cost effective green synthesis of NiO nanostructures as highly efficient photocatalysts for degradation of organic dyes

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