A Review of Green Synthesis of Nanophase Inorganic Materials for Green Chemistry Applications

Genuino, Homer C.; Huang, Hui; Njagi, Eric C.; Stafford, Lisa; Suib, Steven L.

doi:10.1002/9783527628698.hgc092

Cited by 20 publications

(19 citation statements)

References 192 publications

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“…According to previous investigations, the polyol components and the water-soluble heterocyclic components in these plants play a significant role in the reduction of metallic ions. ey have proven to be effective capping and stabilizing agents for the nanoparticles with widespread technological and medicinal applications [25][26][27]. Silver and magnesium oxide nanoparticles have been synthesized using various plant extracts.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of Ultrasonically Modified Ag-MgO Nanocomposite and Its Potential for Antimicrobial Activity

Ayinde

Gitari

Muchindu

et al. 2018

Journal of Nanotechnology

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This study reports a green synthesis route for a bilayered Ag-MgO nanocomposite using aqueous peel extract of Citrus paradisi (grapefruit red) under an accelerated uniform heating technique and its antibacterial potency against Escherichia coli. Surface modifications and composition of the nanocomposite were examined using a UV-visible spectrophotometer, transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM) equipped with an energy dispersive X-ray (EDX) analyzer. The efficiencies of the as-synthesized Ag-MgO nanocomposite against Escherichia coli were examined. The synthesized Ag-MgO nanocomposite showed characteristic synergetic bands at 290 nm for MgO nanoparticle and at around 440 nm for Ag nanoparticle which blue-shifted to 380 nm in the composite. A spherically dispersed nanocomposite with cubical crystal lattice network with a diameter of about 20–100 nm comprising Ag nanoparticle embedded within MgO nanoparticles was obtained. The nanocomposite produced stronger antibacterial activity against Escherichia coli as compared to MgO nanoparticle, indicating a higher interaction between Ag and MgO ions. The nanocomposite was successfully synthesized via an efficient modified method by bioreductive agents with an improved synergistic antibacterial property towards water purification.

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Section: Introductionmentioning

confidence: 99%

Biosynthesis of Ultrasonically Modified Ag-MgO Nanocomposite and Its Potential for Antimicrobial Activity

Ayinde

Gitari

Muchindu

et al. 2018

Journal of Nanotechnology

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“…A lot of investigations have been carried out, applying green chemistry routes, where possible, to synthesize various hybrids [177,178], materials and composites. The greener chemistry methods have been developed, in particular for titanium and manganese oxides, metal and metal oxide nanoparticles (see also sections above), mainly by hydrothermal and microwave-assisted techniques, as well as reflux [179]. Apart, several important green procedures have been offered for important types of materials as polymers and their composites, ceramics and bioceramics, cement, adsorbents and carbon-based aerogels.…”

Section: Materials Nanomaterials Composites and Hybridsmentioning

confidence: 99%

Greener synthesis of chemical compounds and materials

et al. 2019

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Modern trends in the greener synthesis and fabrication of inorganic, organic and coordination compounds, materials, nanomaterials, hybrids and nanocomposites are discussed. Green chemistry deals with synthesis procedures according to its classic 12 principles, contributing to the sustainability of chemical processes, energy savings, lesser toxicity of reagents and final products, lesser damage to the environment and human health, decreasing the risk of global overheating, and more rational use of natural resources and agricultural wastes. Greener techniques have been applied to synthesize both well-known chemical compounds by more sustainable routes and completely new materials. A range of nanosized materials and composites can be produced by greener routes, including nanoparticles of metals, non-metals, their oxides and salts, aerogels or quantum dots. At the same time, such classic materials as cement, ceramics, adsorbents, polymers, bioplastics and biocomposites can be improved or obtained by cleaner processes. Several non-contaminating physical methods, such as microwave heating, ultrasound-assisted and hydrothermal processes or ball milling, frequently in combination with the use of natural precursors, are of major importance in the greener synthesis, as well as solventless and biosynthesis techniques. Non-hazardous solvents including ionic liquids, use of plant extracts, fungi, yeasts, bacteria and viruses are also discussed in relation with materials fabrication. Availability, necessity and profitability of scaling up green processes are discussed.

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“…Moreover, the need for an efficient, sustainable and conservation of energy methods to process chemical reactions has led to the search for an alternative power source over conventional heating routes in recent times. Microwave-assisted synthesis methods provide a much faster way not only to prepare materials but also to create smaller particulate materials, thus contributing to energy savings and satisfying the demands for more environmentally benign materials and procedures (4).…”

Section: Introductionmentioning

confidence: 99%

Optimization of microwave-assisted synthesis of silver nanoparticle byCitrus paradisipeel and its application against pathogenic water strain

Ayinde

Gitari

Samie

2019

Green Chemistry Letters and Reviews

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This study focuses on time-dependent microwave-assisted biosynthesis of silver nanoparticles using aqueous peel extracts of Citrus paradisi as a reducing, stabilizing and capping agent with emphasis on its antibacterial property. Optical, structural and morphological properties of the synthesized Citrus paradisi peel extract silver nanoparticle (CPAgNp) were characterized using UV-visible spectrophotometer, transmission electron microscope (TEM), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), Brunauer-Emmett-Teller (BET) and Xray diffractometer (XRD). The antimicrobial activity was evaluated using the well-and discdiffusion methods. Characteristic surface plasmon resonance (SPR) wavelength in the range of 420-440 nm at an optimized intensity growth rate typical of silver nanoparticles was obtained. The synthesized CPAgNp are spherical in shape having the size range of 14.84 ± 5 nm and possessing fcc unit phase structure. The Citrus paradisi peel extract mediated AgNp were found to possess a broad-spectrum antimicrobial activity against water-borne pathogenic microbes.

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A Review of Green Synthesis of Nanophase Inorganic Materials for Green Chemistry Applications

Abstract: The sections in this article are Introduction Green Synthesis of Nanophase Inorganic Materials Metal Oxide Nanoparticles Hydrothermal Synthesis Reflux Synthesis Microwave‐Assisted Synthesis Green Synthesis of Metallic Nanoparticles … Show more

Cited by 20 publications

References 192 publications

Biosynthesis of Ultrasonically Modified Ag-MgO Nanocomposite and Its Potential for Antimicrobial Activity

Biosynthesis of Ultrasonically Modified Ag-MgO Nanocomposite and Its Potential for Antimicrobial Activity

Greener synthesis of chemical compounds and materials

Optimization of microwave-assisted synthesis of silver nanoparticle byCitrus paradisipeel and its application against pathogenic water strain

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