Effect of pH on Crystal Size and Photoluminescence Property of ZnO Nanoparticles Prepared by Chemical Precipitation Method

Chithra, M.; Sathya, M.; Pushpanathan, K.

doi:10.1007/s40195-015-0218-8

Cited by 231 publications

(69 citation statements)

References 46 publications

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“…This observation indicate that, DEG/TEG molecules get adsorbed on synthesized ZnO nanoparticles [48] . The differences in the particle sizes may lead to different wavenumber and frequencies are consistent to the reported literature [52] .…”

Section: Resultssupporting

confidence: 91%

Synthesis and characterization of zinc oxide nanoparticles by using polyol chemistry for their antimicrobial and antibiofilm activity

Mahamuni

Patil

Dhanavade

et al. 2019

Biochemistry and Biophysics Reports

156

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The present investigation deals with facile polyol mediated synthesis and characterization of ZnO nanoparticles and their antimicrobial activities against pathogenic microorganisms. The synthesis process was carried out by refluxing zinc acetate precursor in diethylene glycol(DEG) and triethylene glycol(TEG) in the presence and in the absence of sodium acetate for 2 h and 3 h. All synthesized ZnO nanoparticles were characterized by X-ray diffraction (XRD), UV visible spectroscopy (UV), thermogravimetric analysis (TGA), fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy(FESEM), transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX) technique. All nanoparticles showed different degree of antibacterial and antibiofilm activity against Gram-positive Staphylococcus aureus (NCIM 2654)and Gram-negative Proteus vulgaris (NCIM 2613). The antibacterial and antibiofilm activity was inversely proportional to the size of the synthesized ZnO nanoparticles. Among all prepared particles, ZnO nanoparticles with least size (~ 15 nm) prepared by refluxing zinc acetate dihydrate in diethylene glycol for 3 h exhibited remarkable antibacterial and antibiofilm activity which may serve as potential alternatives in biomedical application.

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Section: Resultssupporting

confidence: 91%

Synthesis and characterization of zinc oxide nanoparticles by using polyol chemistry for their antimicrobial and antibiofilm activity

Mahamuni

Patil

Dhanavade

et al. 2019

Biochemistry and Biophysics Reports

156

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“…Next peak ∼1100 cm -1 is also due to Zn-O bonds. The peak ∼1420 and 1570 cm -1 correspond to COO– (carboxylate group) and C = C bond, respectively ( Chithra et al, 2015 ). Last peak ∼3420 cm -1 can be ascribed to the O–H stretching ( Chithra et al, 2015 ).…”

Section: Resultsmentioning

confidence: 99%

Mechanism of Anti-bacterial Activity of Zinc Oxide Nanoparticle Against Carbapenem-Resistant Acinetobacter baumannii

et al. 2018

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Acinetobacter baumannii is a multi-drug resistant opportunistic pathogen, which causes respiratory and urinary tract infections. Its prevalence increases gradually in the clinical setup. Carbapenems (beta-lactam) are most effective antibiotics till now against A. baumannii, but the development of resistance against it may lead to high mortality. Therefore, it is of utmost importance to develop an alternative drug against A. baumannii. In the present study, we have synthesized ZnO nanoparticle (ZnO-NP) and characterized by X-ray diffraction, Fourier transform infrared (FTIR) spectroscopy and UV-Visible spectroscopy. Prepared ZnO-NPs have the size of 30 nm and have different characteristics of ZnO-NPs. Growth kinetics and disk diffusion assay showed that ZnO-NP demonstrated good antibacterial activity against carbapenem resistant A. baumannii. We have also investigated the mechanism of action of ZnO-NPs on the carbapenem resistant strain of A. baumannii. The proposed mechanism of action of ZnO involves the production of reactive oxygen species, which elevates membrane lipid peroxidation that causes membrane leakage of reducing sugars, DNA, proteins, and reduces cell viability. These results demonstrate that ZnO-NP could be developed as alternative therapeutics against A. baumannii.

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“…Here, the room temperature PL spectrum Figure (b) shows a strong emission peak at 469 nm might be attributed to the photogenerated carrier (electron‐hole pairs) recombination on the surface . In addition, the broad peaks at 425 and 440 nm are assigned to the band edge free excitons and bound excitons presence on the surface, respectively (presence of zinc interstitials and its recombination between the electrons and holes localized at the valence band) . Besides, the weak emission bands at 455, 480, 490 nm suggests that the violet and blue emissions responsible for numerous defects present on the sample surface (examples of defect states such as oxygen vacancies and zinc interstitials) .…”

Section: Resultsmentioning

confidence: 99%

Synthesis of ZnTiO₃@TiO₂ Heterostructure Nanomaterial as a Visible light Photocatalyst

Bhagwat

Asiri³

et al. 2019

ChemistrySelect

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Here ZnTiO3@TiO2 heterostructure nanomaterial was prepared through a simple sonochemical strategy using TiO2 (P25) with zinc nitrate as a precursor and then calcined the obtained sample at 700 °C in 2h for the photocatalytic degradation of Congo red dye solution. XRD result confirms that the diffraction patterns related to the ZnTiO3 and TiO2 as heterostructure with high purity. SEM confirms that particles are irregular in shape with high agglomeration and HRTEM reveals that ZnTiO3@TiO2 is highly crystalline with a lattice spacing of 0.37 nm. The calculated band gap of as‐synthesized ZnTiO3@TiO2 heterostructure nanomaterial is found to be 3.07 eV. The photocatalytic degradation of as prepared ZnTiO3@TiO2 heterostructure was investigated for the degradation of Congo red dye by varying the effect of catalyst amount and initial dye concentration. The ZnTiO3@TiO2 heterostructure nanomaterial exhibited 96% degradation efficiency of Congo red in 4h under visible light illumination. Moreover, the photodegradation mechanism of Congo red was studied with various scavengers such as EDTA, IPA, and Benzoquinone. Further, the detection of OH radicals during photocatalytic processes was confirmed by luminescence technique using terephthalic acid (TA) as a test molecule.

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Effect of pH on Crystal Size and Photoluminescence Property of ZnO Nanoparticles Prepared by Chemical Precipitation Method

Cited by 231 publications

References 46 publications

Synthesis and characterization of zinc oxide nanoparticles by using polyol chemistry for their antimicrobial and antibiofilm activity

Synthesis and characterization of zinc oxide nanoparticles by using polyol chemistry for their antimicrobial and antibiofilm activity

Mechanism of Anti-bacterial Activity of Zinc Oxide Nanoparticle Against Carbapenem-Resistant Acinetobacter baumannii

Synthesis of ZnTiO₃@TiO₂ Heterostructure Nanomaterial as a Visible light Photocatalyst

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Effect of pH on Crystal Size and Photoluminescence Property of ZnO Nanoparticles Prepared by Chemical Precipitation Method

Cited by 231 publications

References 46 publications

Synthesis and characterization of zinc oxide nanoparticles by using polyol chemistry for their antimicrobial and antibiofilm activity

Synthesis and characterization of zinc oxide nanoparticles by using polyol chemistry for their antimicrobial and antibiofilm activity

Mechanism of Anti-bacterial Activity of Zinc Oxide Nanoparticle Against Carbapenem-Resistant Acinetobacter baumannii

Synthesis of ZnTiO3@TiO2 Heterostructure Nanomaterial as a Visible light Photocatalyst

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Synthesis of ZnTiO₃@TiO₂ Heterostructure Nanomaterial as a Visible light Photocatalyst