Applications of phytogenic ZnO nanoparticles: A review on recent advancements

Prasad, Anupama R.; Williams, Linda S.; Garvasis, Julia; Shamsheera, K.O.; Basheer, Sabeel M.; Kuruvilla, Mathew; Joseph, Abraham

doi:10.1016/j.molliq.2021.115805

Cited by 70 publications

(34 citation statements)

References 186 publications

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“…Among the different metal oxides NPs, ZnO NPs have been found to have strong antibacterial activities [1,68] due to their unique characteristics [7]. Moreover, ZnO NPs are adequate for antimicrobial applications because of their stability under severe processing conditions [69,70].…”

Section: Evaluation Of the Antibacterial Activity Of Zno Npsmentioning

confidence: 99%

“…64, No. 7 (2021) NPs suitable for a vast range of applications in various areas of industry, medicine, agriculture, food, electronics, and environmental remediation [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…The simplest method of stabilizing is by a surface coating surrounding the particles; this reduces the interaction between the nanoparticles; thereby inhibiting its aggregation [23]. Several reports have been articulated the use of many conventional chemical stabilizers such as functionalized long-chain hydrocarbons, polymers, block copolymers, and dendrimers [7,24,25]; their major drawback is primarily the use of highly toxic solvents or chemicals that are unsafe to the environment. So, green materials were introduced as several bioinspired methods for the synthesis of nanomaterials recommending the use of bio-origins such as enzymes, vitamins, polyphenols, phytochemicals, and polysaccharides (starch, chitosan, cellulose, etc.)…”

Section: Introductionmentioning

confidence: 99%

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Optimized Synthesis of Biopolymer-Based Zinc Oxide Nanoparticles and Evaluation of Their Antibacterial Activity

et al. 2021

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Owing to their unique properties, zinc oxide nanoparticles (ZnO NPs) have a broad range of exciting applications. However, the problem of nanoparticles aggregation remains challenging. So, biopolymers of polysaccharides can provide green and promising stabilizers as alternatives to the current toxic chemical stabilizers during ZnO NPs synthesis. The main idea in this investigation is to tune ZnO NPs with an appropriate texture, shape, and size for antibacterial application. So, this work compares the use of three different eco-friendly stabilizers namely starch, carboxymethyl cellulose, and hydroxyethyl cellulose as alternatives capping agents in the fabrication of ZnO NPs at various times. The optimized ZnO NPs sample was obtained using starch as the optimum stabilizer at reaction conditions of 0.5 h, room temperature (25 °C), 1:2 )MZn:MNaOH) ratio and 1% (w/v) starch concentration. The optical, texture, and structural properties of prepared ZnO NPs were characterized by UV-Vis, DLS, zeta potential, FT-IR, and TEM techniques. ZnO NPs showed a mean zeta potential of −21.6 mV, explaining that they are moderately stable. The analysis by TEM confirmed that the NPs were spherical and have an average size of 23 nm. The antibacterial properties of ZnO NPs against Gram-positive (Bacillus subtilis and Staphylococcus epidermidis) and Gramnegative (Enterobacter cloacae and Escherichia coli) bacteria were evaluated based on the zone of inhibition (ZOI) values expressed in mm. The results showed promising performances for their antibacterial activity against the tested bacteria which indicated a strong antibacterial activity of ZnO NPs against B. subtilis, S. epidermidis, and E. cloacae with ZOI values of 17, 14 and 16 mm, respectively, and it showed moderate activity against E. coli (ZOI = 10 mm). The synthesis of biopolymer stabilized ZnO NPs by this approach could be eco-friendly and cost-effective and synthesized ZnO NPs can serve as promising antibacterial agents.

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Section: Evaluation Of the Antibacterial Activity Of Zno Npsmentioning

confidence: 99%

“…64, No. 7 (2021) NPs suitable for a vast range of applications in various areas of industry, medicine, agriculture, food, electronics, and environmental remediation [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimized Synthesis of Biopolymer-Based Zinc Oxide Nanoparticles and Evaluation of Their Antibacterial Activity

et al. 2021

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“…Currently, nanotechnology is based on the preparation, characterization and applications of different nanoparticles (NPs) such as metals, metal oxides, semiconductors, ceramics and polymers, due to their outstanding morphological, structural and physicochemical properties allowed the NPs to be the used in a wide variety of applications. Among the most commonly used nanoparticles is zinc oxide nanoparticles (ZnO NPs), which are usually used in different applications, such as corrosion protection [ 1 ], food packaging [ 2 ], biomedical [ 3 , 4 , 5 ], electronics [ 6 ], revolutionizing agriculture [ 7 ], textiles [ 8 ] and as photocatalysts for environmental applications [ 9 , 10 , 11 , 12 , 13 ]. The synthesis of ZnO NPs are usually based on various physical, and chemical process, such as via combustion, thermal decomposition, sol-gel method, mechanical synthesis combined with high-energy milling and hydrothermal methods, which are mainly based on the usage of different chemicals and reagents such as the aqueous solution of zinc nitrate, zinc sulphate or zinc acetate as the precursor, followed by provision of basic environment such as sodium hydroxide or ammonia, in addition to some additives acting similarly to capping agents to produce well defined nanoparticles such as polyethylenimine (PEI) or polyethylene glycol (PEG) [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis Microwave-Assisted of Zinc Oxide Nanoparticles with Ziziphus jujuba Leaves Extract: Characterization and Photocatalytic Application

et al. 2021

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The present work is intended to biosynthesize zinc oxide nanoparticles (ZnO NPs) via facile and modern route using aqueous Ziziphus jujuba leaves extract assisted by microwave and explore their photocatalytic degradation of methyl orange anionic dye and methylene blue cationic dye under solar irradiation. The biosynthesized microwave assisted ZnO NPs were characterized and the results showed that ZnO NPs contain hexagonal wurtzite and characterized with a well-defined spherical-like shape with an outstanding band gap (2.70 eV), average particle size of 25 nm and specific surface area of 11.4 m2/g. The photocatalytic degradation of the MO and MB dyes by biosynthesized ZnO NPs under solar irradiation was studied and the results revealed the selective nature of the ZnO NPs for the adsorption and further photocatalytic degradation of the MO dye compared to the MB dye. In addition, the photocatalytic degradation of MO and MB dyes by the ZnO NPs under solar radiation was fitted by the first-order kinetics. Moreover, the photodegradation mechanism proposed that superoxide ions and hydroxyl radicals are the main reactive species.

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“…However, their exact mechanism remains difficult to confirm. For this reason, various authors have supported the interactions caused by ROS, since inducing oxidative stress in cells interrupts the synthesis of biomolecules, such as lipids, proteins, and even DNA, resulting in bacterial death [ 173 , 203 ]. In addition, it has been proposed that particle size, as well as the morphology they present, can cause less or more damage, depending on what is intended, since these can enter the cells and damage the integrity of bacteria by attacking the membrane [ 202 , 204 ].…”

Section: Nanotechnology Applied To Antimicrobial Resistancementioning

confidence: 99%

Antimicrobial Resistance and Inorganic Nanoparticles

Balderrama-González

Piñón-Castillo

Ramírez-Valdespino

et al. 2021

IJMS

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Antibiotics are being less effective, which leads to high mortality in patients with infections and a high cost for the recovery of health, and the projections that are had for the future are not very encouraging which has led to consider antimicrobial resistance as a global health problem and to be the object of study by researchers. Although resistance to antibiotics occurs naturally, its appearance and spread have been increasing rapidly due to the inappropriate use of antibiotics in recent decades. A bacterium becomes resistant due to the transfer of genes encoding antibiotic resistance. Bacteria constantly mutate; therefore, their defense mechanisms mutate, as well. Nanotechnology plays a key role in antimicrobial resistance due to materials modified at the nanometer scale, allowing large numbers of molecules to assemble to have a dynamic interface. These nanomaterials act as carriers, and their design is mainly focused on introducing the temporal and spatial release of the payload of antibiotics. In addition, they generate new antimicrobial modalities for the bacteria, which are not capable of protecting themselves. So, nanoparticles are an adjunct mechanism to improve drug potency by reducing overall antibiotic exposure. These nanostructures can overcome cell barriers and deliver antibiotics to the cytoplasm to inhibit bacteria. This work aims to give a general vision between the antibiotics, the nanoparticles used as carriers, bacteria resistance, and the possible mechanisms that occur between them.

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Applications of phytogenic ZnO nanoparticles: A review on recent advancements

Cited by 70 publications

References 186 publications

Optimized Synthesis of Biopolymer-Based Zinc Oxide Nanoparticles and Evaluation of Their Antibacterial Activity

Optimized Synthesis of Biopolymer-Based Zinc Oxide Nanoparticles and Evaluation of Their Antibacterial Activity

Biosynthesis Microwave-Assisted of Zinc Oxide Nanoparticles with Ziziphus jujuba Leaves Extract: Characterization and Photocatalytic Application

Antimicrobial Resistance and Inorganic Nanoparticles

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