Bioinspired synthesis of zinc oxide nano-flowers: A surface enhanced antibacterial and harvesting efficiency

Hasan, Murtaza; Altaf, Mahrukh; Zafar, Ayesha; Hassan, Shahbaz Gul; Ali, Zeeshan; Mustafa, Ghazala; Munawar, Tauseef; Saif, Muhammad Saqib; Tariq, Tuba; Iqbal, Faisal; Khan, Muhammad Waqas; Mahmood, Asif; Mahmood, Nasir; Shu, Xugang

doi:10.1016/j.msec.2020.111280

Cited by 81 publications

(33 citation statements)

References 36 publications

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“…FTIR spectral analysis showed that the presence of phenolic molecular groups in the extract promoted the reduction of zinc precursor to form nanoflowers, whereas the amide linkages and amino acids in the algal extract served as a stabilizing agent for nanoflower formation. 111 Besides, Hamouda et al (2020) recently utilized the green alga named Ulva fasciata to synthesize biogenic zinc oxide nanoparticles and compared their efficacy to inhibit infectious bacterial growth with the same nanoparticles synthesized via a wet chemical approach. The results showed that both synthesis approaches yielded flake-shaped particles, the algal extract yielded rod-shaped nanoparticles, and the chemical approach led to the formation of 10–14 nm sized spherically shaped nanoparticles.…”

Section: Microbial Synthesismentioning

confidence: 99%

Green approaches for the synthesis of metal and metal oxide nanoparticles using microbial and plant extracts

et al. 2022

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Section: Microbial Synthesismentioning

confidence: 99%

Green approaches for the synthesis of metal and metal oxide nanoparticles using microbial and plant extracts

et al. 2022

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“…In addition, it has a fast growth rate which makes it easy to see the effects. There are many reports on physical and chemical methods of nanoparticles synthesis [23,24] but phytosynthesized nanoparticles and their impact on plants are rarely studied [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Phytotoxic Evaluation of Phytosynthesized Silver Nanoparticles on Lettuce

et al. 2021

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The increasing metal release into the environment warrants investigating their impact on plants, which are cornerstones of ecosystems. Here, Lactuca sativa L. (lettuce) seedlings were exposed hydroponically to different concentrations of silver ions and nanoparticles (Ag NPs) for 25 days to evaluate their impact on plant growth. Seedlings taking Ag+ ions showed an increment of 18% in total phenolic content and 12% in total flavonoid content, whereas under Ag NPs, 7% free radical scavenging activity, 12% total phenolic contents (TPC), and 10% total reducing power are increased. An increase in 31% shoot length, 25% chlorophyll, 11% carbohydrate, and 16% protein content of the lettuce plant is observed in response to Ag NPs, while silver nitrate (AgNO3) has a reduced 40% growth. The lettuce plant was most susceptible to toxic effects of Ag+ ions at a lower concentration, i.e., 0.01 mg/L, while Ag NPs showed less toxicity, only when higher concentrations >100 mg/L were applied. Further, biomolecules other than antioxidant enzymes showed higher phytotoxicity for Ag+ ions, followed by Ag NPs with the concentration of 25, 50, and 100 mg/L compared to the control. Thus, moderate concentrations of Ag NPs have a stimulatory effect on seedling growth, while higher concentrations induced inhibitory effects due to the release of Ag+ ions. These results suggest that optimum metallic contents are desirable for the healthier growth of plants in a controlled way.

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“…3a, b) revealed 'flower-shaped' zinc oxide nanoparticles. These asteroidal uniform nanopetals homogeneously exuded out from the center, being powerfully held to the spherical pedicle and providing an almost precise 3D alignment (Hasan 2021). The alkaline conditions used during the synthesis process formed flower-like ZnONPs.…”

Section: Fe-sem-eds Analysismentioning

confidence: 99%

“…Moreover, it has high bandgap energy with enormous binding energy and hence, utilized in different fields, including cosmetics, medicine, and environmental remediation (Kadam et al 2020). Recently, green synthesis has grown to be a key motivating force for nanoparticle synthesis (Hasan 2021). The release of massive quantities of colorants in the water bodies is a major environmental crisis (Varadavenkatesan et al 2020a, b).…”

Section: Introductionmentioning

confidence: 99%

Characterization and photocatalytic activity of ZnO nanoflowers synthesized using Bridelia retusa leaf extract

et al. 2021

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In the current work, the leaf extract of Bridelia retusa was used for the first time to synthesize zinc oxide nanoparticles (ZnONPs). A zinc nanoparticle-specific 364-nm peak was discerned via UV–Vis studies with a typical bandgap energy of 3.41 eV. FE-SEM micrographs revealed flower-shaped structure of the ZnONPs. EDS analysis corroborated the presence of zinc and oxygen. XRD spectrum established the wurtzite structure, sized at 11.06 nm. The mesoporous texture (4.89 nm) of the nanoparticles was deduced from BET analysis, proving a higher specific surface area than commercial ZnONPs. FTIR spectroscopy resulted in absorption bands typical for ZnONPs. Within a span of 165 min, under solar irradiation, the ZnONPs facilitated the photocatalytic degradation of Rhodamine B dye upto 94.74%. Exhibiting pseudo-first-order kinetics, the process had a degradation constant of 0.0109 min−1. It was concluded that numerous factors led to the high degradation efficiency. High values of bandgap energy and specific surface area, along with the mesoporous and crystalline nature of the ZnONPs led to the observed effect. The ZnONPs were also stabilized by the phytochemicals in the B. retusa leaves. The study is thus able to successfully demonstrate the huge potential in the field of environmental nanoremediation. The viability of using ZnONPs as solar photocatalysts for treating dye-laden industrial wastewater was thus attested.

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Bioinspired synthesis of zinc oxide nano-flowers: A surface enhanced antibacterial and harvesting efficiency

Cited by 81 publications

References 36 publications

Green approaches for the synthesis of metal and metal oxide nanoparticles using microbial and plant extracts

Green approaches for the synthesis of metal and metal oxide nanoparticles using microbial and plant extracts

Phytotoxic Evaluation of Phytosynthesized Silver Nanoparticles on Lettuce

Characterization and photocatalytic activity of ZnO nanoflowers synthesized using Bridelia retusa leaf extract

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