Green biomimetic preparation of efficient Ag–ZnO heterojunctions with excellent photocatalytic performance under solar light irradiation: a novel biogenic-deposition-precipitation approach

Choudhary, Manoj K.; Kataria, Jyoti; Bhardwaj, Vimal K.; Sharma, Shweta

doi:10.1039/c8na00318a

Cited by 56 publications

(30 citation statements)

References 36 publications

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“…For both components-organic and inorganic-green methods were analysed apart. In the case of inorganic colloids, they can be produced from renewable resources in some cases, additionally to be synthesized by assistance of organisms or via hydrothermal reactions [83]. In the case of polymers (organic component), they can be polymerized from non-high-molecular precursors by green routes and from renewable resources.…”

Section: Biological Methodsmentioning

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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Section: Biological Methodsmentioning

confidence: 99%

Greener synthesis of chemical compounds and materials

et al. 2019

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“…In addition, CeO 2 NP has shown faster POX degradation under UV–Vis irradiation than an ambient light condition. Occurrence of such photocatalytic reactivity is broadly reported in other types of metal oxide NPs including TiO 2 and Ag-ZnO [ 150 , 151 ]. Their photocatalytic reactivity is linked to more effective degradation of parathion and chlorpyrifos that occurs under a (simulated) solar light condition.…”

Section: Therapeutic Platforms For Reactive Organophosphate Treatmmentioning

confidence: 99%

“…This is illustrated with those nanoscavengers made of liposome [ 120 , 134 , 139 ], polymer [ 140 , 141 ], MOF [ 117 , 148 ], metal oxide [ 149 , 150 , 151 ] and dendrimer [ 37 , 130 , 155 ]. Their scavenging capability relies on reactive functionalities either present in unmodified nanomaterials such as photocatalytic metal oxides [ 149 , 150 , 151 ] or built additionally such as oximes [ 120 , 134 ], metal chelates [ 140 , 141 ], amines [ 148 ] or amino acids [ 155 ]. Alternatively, specific functionalization is achieved through bioscavenger encapsulation such as phosphotriesterase [ 139 ] or OPAA [ 117 ] encapsulated in liposomes [ 139 ] or porous MOF [ 117 ].…”

Section: Conclusion and Perspectivementioning

confidence: 99%

“…Nanomaterials are readily functionalized to create mechanisms for OP inactivation by which they can serve as OP scavengers [159]. This is illustrated with those nanoscavengers made of liposome [120,134,139], polymer [140,141], MOF [117,148], metal oxide [149][150][151] and dendrimer [37,130,155]. Their scavenging capability relies on reactive functionalities either present in unmodified nanomaterials such as photocatalytic metal oxides [149][150][151] or built additionally such as oximes [120,134], metal chelates [140,141], amines [148] or amino acids [155].…”

Section: Conclusion and Perspectivementioning

confidence: 99%

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Nanomaterial-Enabled Sensors and Therapeutic Platforms for Reactive Organophosphates

Choi

2021

Nanomaterials

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Unintended exposure to harmful reactive organophosphates (OP), which comprise a group of nerve agents and agricultural pesticides, continues to pose a serious threat to human health and ecosystems due to their toxicity and prolonged stability. This underscores an unmet need for developing technologies that will allow sensitive OP detection, rapid decontamination and effective treatment of OP intoxication. Here, this article aims to review the status and prospect of emerging nanotechnologies and multifunctional nanomaterials that have shown considerable potential in advancing detection methods and treatment modalities. It begins with a brief introduction to OP types and their biochemical basis of toxicity followed by nanomaterial applications in two topical areas of primary interest. One topic relates to nanomaterial-based sensors which are applicable for OP detection and quantitative analysis by electrochemical, fluorescent, luminescent and spectrophotometric methods. The other topic is directed on nanotherapeutic platforms developed as OP remedies, which comprise nanocarriers for antidote drug delivery and nanoscavengers for OP inactivation and decontamination. In summary, this article addresses OP-responsive nanomaterials, their design concepts and growing impact on advancing our capability in the development of OP sensors, decontaminants and therapies.

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“…Nanoparticles have been gaining attention due to its excellent properties as compared to bulk materials like high conductivity, catalytic activity, chemical stability, high surface to volume ratio, etc. [1][2][3] These unique properties lead nanoparticles, especially metal nanoparticles, to be developed in various applications such as sensor, [4] electronic, [3] catalyst, [5][6][7][8] and especially as biomedical applications. Silver nanoparticles have been most advanced for nanomedicine, which for a long time had been emerged as an antibacterial agent and recently extended as anticancer as well.…”

Section: Introductionmentioning

confidence: 99%

The effect of monoethanolamine as stabilizing agent in Uncaria gambir Roxb. mediated synthesis of silver nanoparticles and its antibacterial activity

Labanni

Zulhadjri

Handayani

et al. 2019

Journal of Dispersion Science and Technology

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The development of an economic and eco-friendly approach of silver nanoparticles synthesis is an important issue due to its wide application, especially in biomedical applications. In present study, an eco-friendly method and size controlling is developed to synthesize silver nanoparticles using Uncaria gambir Roxb. and monoethanolamine (MEA) as bioreducing agent and stabilizing agent, respectively. The green synthesized silver nanoparticles are characterized using UV-Vis spectroscopy, X-ray diffraction (XRD), and transmission electron microscope (TEM). The silver nanoparticles are formed due to reducing of silver ion by catechin in Uncaria gambir Roxb. leaf extract which is visually recognized from the color change from pale yellow to grayish brown. The formation of silver nanoparticles is confirmed by UV-Vis spectroscopy analysis which provides SPR band range of 405-416 nm. The TEM analysis shows that spherical nanoparticles are formed with size range between 6-39 nm. The using of MEA with molar ratio to Ag þ 10/1 can maintain stability and reduce the particle size up to 40%. The result of XRD analysis shows 4 peaks referring to well-crystallized face-centred cubic silver nanoparticles. The prepared silver nanoparticle has exhibited good stability for more than 6 months. The synthesized silver nanoparticles exhibited good antibacterial activity against Staphylococcus aureus and Escherichia coli strain with a diameter of inhibition zone up to 36 mm. The synthesized silver nanoparticles also showed better activity against Escherichia coli than that of Staphylococcus aureus. These results show a good potential of Uncaria gambir Roxb. mediated silver nanoparticles to be developed in biomedical application.

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Green biomimetic preparation of efficient Ag–ZnO heterojunctions with excellent photocatalytic performance under solar light irradiation: a novel biogenic-deposition-precipitation approach

Abstract: A novel biogenic-deposition-precipitation (BDP) approach has been presented for the preparation of stable binary composites using fennel seed extract.

Cited by 56 publications

References 36 publications

Greener synthesis of chemical compounds and materials

Greener synthesis of chemical compounds and materials

Nanomaterial-Enabled Sensors and Therapeutic Platforms for Reactive Organophosphates

The effect of monoethanolamine as stabilizing agent in Uncaria gambir Roxb. mediated synthesis of silver nanoparticles and its antibacterial activity

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