Synthesis of ZnO nanoparticles using surfactant free in-air and microwave method

Sharma, Deepali; Sharma, Sapna; Kaith, Balbir Singh; Rajput, Jaspreet Kaur; Kaur, Mohinder

doi:10.1016/j.apsusc.2011.06.094

Cited by 164 publications

(64 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Chemical methods have been found to be cost effective and alternative to gas phase methods. Mechanochemical [13,14], solvothermal [15,16], sol-gel [17,18], precipitation [19], hydrothermal [20,21] and microwave methods [22,23] have been classified under chemical methods. Among these, hydrothermal method is widely used due to green, low cost and low temperature synthesis.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Biosynthesis of ZnO nanoparticles using Jacaranda mimosifolia flowers extract: Synergistic antibacterial activity and molecular simulated facet specific adsorption studies

Sharma

Sabela

Kanchi

et al. 2016

Journal of Photochemistry and Photobiology B: Biology

Self Cite

150

View full text Add to dashboard Cite

The naturally occurring biomolecules present in the plant extracts have been identified to play an active role in the single step formation of nanoparticles with varied morphologies and sizes which is greener and environmentally benign. In the present work, spherical zinc oxide nanoparticles (ZnO NPs) of 2-4nm size were synthesized using aqueous extract of fallen Jacaranda mimosifolia flowers (JMFs), treated as waste. The microwave assisted synthesis was completed successfully within 5min. Thereafter, phase identification, morphology and optical band gap of the synthesized ZnO NPs were done using X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM) and UV-Visible spectroscopy techniques. The composition of JMFs extract was analyzed by gas chromatography-mass spectrometry (GC-MS) and the ZnO NPs confirmation was further explored with fourier transform infrared spectroscopy (FTIR). The GC-MS results confirmed the presence of oleic acid which has high propensity of acting as a reducing and capping agent. The UV-Visible data suggested an optical band gap of 4.03eV for ZnO NPs indicating their small size due to quantum confinement. Further, facet specific adsorption of oleic acid on the surface of ZnO NPs was studied computationally to find out the impact of biomolecules in defining the shape and size of NPs. The viability of gram negative Escherichia coli and gram positive Enterococcus faecium bacteria was found to be 48% and 43%, respectively at high concentration of NPs.

show abstract

Section: Accepted Manuscriptmentioning

confidence: 99%

Biosynthesis of ZnO nanoparticles using Jacaranda mimosifolia flowers extract: Synergistic antibacterial activity and molecular simulated facet specific adsorption studies

Sharma

Sabela

Kanchi

et al. 2016

Journal of Photochemistry and Photobiology B: Biology

Self Cite

150

View full text Add to dashboard Cite

show abstract

“…The photocatalytic property involves the electron transition from the valence band to the conduction band resultant to the direct band gap of 1-D ZnO nanorods. The band gap energy of the 1-D ZnO nanords was determined by the following equation [43],…”

Section: Uv-vis Absorptionmentioning

confidence: 99%

Synthesis of 1-D ZnO nanorods and polypyrrole/1-D ZnO nanocomposites for photocatalysis and gas sensor applications

Patil

Gaikwad

Patil³

et al. 2016

Bull Mater Sci

View full text Add to dashboard Cite

1-D ZnO nanorods and PPy/1-D ZnO nanocomposites were prepared by the surfactant-assisted precipitation and in situ polymerization method, respectively. The synthesized nanorods and nanocomposites were characterized by UV-Vis spectrophotometer, Fourier transform-infrared spectroscopy (FTIR), X-ray diffraction (XRD) and field emission scanning electron microscope (FE-SEM), which gave the evidence of 1-D ZnO nanorods, polymerization of pyrrole monomer and strong interaction between PPy and 1-D ZnO nanorods, respectively. Photocatalytic activity of 1-D ZnO nanorods was conducted by 3 3 level full-factorial design to evaluate the effect of three independent process variables viz., dye concentration (crystal violet), catalyst concentration (1-D ZnO nanorods) and the reaction time on the preferred response: photodegradation efficiency (%). The PPy/1-D ZnO nanocomposites were used for the sensing of NH 3 , LPG, CO 2 and H 2 S gases, respectively, at room temperature. It was observed that PPy/1-D ZnO nanocomposites with different 1-D ZnO nanorod weight ratios (15 and 25%) had better selectivity and sensitivity towards NH 3 at room temperature.

show abstract

“…Microwave drying helps in rapid and homogenous heating of the reaction mixture to the desired temperature, which saves time and energy. Various morphologies, like rod shaped, spherical shaped, flower shaped, can be obtained by microwave irradiation technique [36][37][38]. The phytochemicals present in the Amorphophallus konjac tuber extracts show good vibration response to the microwave irradiation [39].…”

Section: Introductionmentioning

confidence: 99%

Microwave assisted biosynthesis of rice shaped ZnO nanoparticles usingAmorphophallus konjactuber extract and its application in dye sensitized solar cells

Kumar¹,

Sakthivel²,

Balasubramanian³

2017

Materials Science-Poland

View full text Add to dashboard Cite

Rice shaped ZnO nanoparticles have been synthesized for the first time by a biological process using Amorphophallus konjac tuber extract and used as a photoanode in a dye sensitized solar cell. The glucomannan present in aqueous tuber extract acted as a reducing agent in the synthesis process, further it also acted as a template which modified and controlled the shape of the nanoparticles. The synthesized nanoparticles were dried by microwave irradiation followed by annealing at 400°C. The FESEM and TEM images confirmed that the synthesized ZnO nanoparticles had rice shaped morphology. Furthermore, the X-ray diffraction studies revealed that the prepared ZnO nanoparticles exhibited wurtzite phase with average particle size of 17.9 nm. The UV-Vis spectroscopy studies confirmed the value of band gap energy of biosynthesized ZnO nanoparticles as 3.11 eV. The photoelectrodes for dye sensitized solar cells were prepared with the biosynthesized ZnO nanoparticles using doctor blade method. The photoelectrode was sensitized using the fruit extract of Terminalia catappa, flower extracts of Callistemon citrinus and leaf extracts of Euphorbia pulcherrima. The dye sensitized solar cells were fabricated using the sensitized photoelectrode and their open circuit voltages and short circuit current densities were found to be in the range of 0.45 V to 0.55 V and 5.6 mA/cm 2 to 6.8 mA/cm 2 , respectively. Thus, the photovoltaic performances of all the natural dye sensitized ZnO solar cells show better conversion efficiencies due to the morphology and preparation technique.

show abstract

Synthesis of ZnO nanoparticles using surfactant free in-air and microwave method

Cited by 164 publications

References 45 publications

Biosynthesis of ZnO nanoparticles using Jacaranda mimosifolia flowers extract: Synergistic antibacterial activity and molecular simulated facet specific adsorption studies

Biosynthesis of ZnO nanoparticles using Jacaranda mimosifolia flowers extract: Synergistic antibacterial activity and molecular simulated facet specific adsorption studies

Synthesis of 1-D ZnO nanorods and polypyrrole/1-D ZnO nanocomposites for photocatalysis and gas sensor applications

Microwave assisted biosynthesis of rice shaped ZnO nanoparticles usingAmorphophallus konjactuber extract and its application in dye sensitized solar cells

Contact Info

Product

Resources

About