Synthesis and microstructural properties of ZnO nanoparticles prepared by precipitation method

Raoufi, Davood

doi:10.1016/j.renene.2012.08.076

Cited by 296 publications

(135 citation statements)

References 34 publications

Supporting

Mentioning

120

Contrasting

Unclassified

Order By: Relevance

“…Two strong UV emission peaks at about 387 and 393 nm can be clearly observed in the as obtained ZnO samples, which corresponds to the free-exciton recombination related to the UV region [28,29]. Both of the peaks values were close to the theoretical energy band-gap of ZnO [30,31]. PL emission is generated by recombination of excited electrons and holes.…”

Section: Pl Spectrumsupporting

confidence: 60%

See 1 more Smart Citation

Hydrothermal synthesis of flower cluster-shaped ZnO microstructures with sodium lignosulfonate as structure-directing agent

Chen

Zhang

Wang

et al. 2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Flower cluster-shaped ZnO microstructures have been successfully synthesized by a facile hydrothermal approach without further heat treatment using Zn(NO 3 ) 2 . 6H 2 O and NaOH as raw materials and sodium lignosulfonate (SL) as a structure-directing agent. The morphology, structure, and property of the products were characterized by X-ray powder diffraction, fourier transform infrared spectroscopy, scanning electron microscopy, Brunauer-Emmett-Teller nitrogen adsorption-desorption isotherms and photoluminescence spectrum. The photocatalytic activity of the as-prepared samples were evaluated by photocatalytic decolorization of methylene blue aqueous solution at ambient temperature. The results indicated that the prepared ZnO-SL sample exhibited flower clustered morphology, hexagonal wurtzite structure, higher surface areas and better UV and visible photocatalytic activity. Moreover, the ZnO-SL sample showed excellent stability after three photodegradation cycling runs.

show abstract

Section: Pl Spectrumsupporting

confidence: 60%

“…PL emission is generated by recombination of excited electrons and holes. So the lower the recombination rate of electrons and holes might cause a smaller the intensity of PL spectrum [31]. As shown in Fig.…”

Section: Pl Spectrummentioning

confidence: 93%

Hydrothermal synthesis of flower cluster-shaped ZnO microstructures with sodium lignosulfonate as structure-directing agent

Chen

Zhang

Wang

et al. 2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

show abstract

“…ZnO is a wide direct bandgap semiconductor (3.37 eV at room temperature), with a large free exciton binding energy of 60 meV, leading to efficient exciton emission at room temperature [1,2]. Its applications include thin film and single crystal transistors [3,4], UV/ozone detectors [5,6], light emitting diodes (LEDs) [7,8], phosphorescent glasses [9], piezoelectric devices [10,11], dye solar cells [12,13], photocatalytic agent [14], anti-bacterial and anti-fungal agents [15,16] with different morphologies, like electrodeposition [17,18], electrospinning [19], precipitation [20,21], laser assisted flow deposition (LAFD) [22] and solvothermal and hydrothermal synthesis, whether by conventional heating [23,24] or microwave radiation [25][26][27]. Different synthesis conditions and methods can ensure different ZnO morphologies like wires, pencil-and needle-like rods, flowers, tetrapods, tubes, among other types of particles [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Effect of solvents on ZnO nanostructures synthesized by solvothermal method assisted by microwave radiation: a photocatalytic study

et al. 2015

View full text Add to dashboard Cite

The present work reports the synthesis of zinc oxide (ZnO) nanoparticles with hexagonal wurtzite structure considering a solvothermal method assisted by microwave radiation and using different solvents: water (H 2 O), 2-ethoxyethanol (ET) and ethylene glycol (EG). The structural characterization of the produced ZnO nanoparticles has been accessed by scanning electron microscopy, X-ray diffraction, room-temperature photoluminescence and Raman spectroscopies. Different morphologies have been obtained with the solvents tested. Both H 2 O and ET resulted in rods with high aspect ratio, while EG leads to flower-like structure. The UV absorption spectra showed peaks with an orange shift for synthesis with H 2 O and ET and blue shift for synthesis with EG. The different synthesized nanostructures were tested for photocatalyst applications, revealing that the ZnO nanoparticles produced with ET degrade faster the molecule used as model dye pollutant, i.e. methylene blue. Graphical AbstractIntroduction

show abstract

“…8 The precipitation method can control different parameters such as solution concentration and pH. 9,10 The synthesis of ZnO nanoparticles by the precipitation method involves the reaction of zinc salts such as Zn(NO 3 ) 2 , Zn(CH 3 COO) 2 ·2H 2 O and ZnSO 4 with basic * Author for correspondence (rudeerat_p@hotmail.com) solutions containing LiOH, NH 4 OH and NaOH. 3,11,12 Kumar et al 13 synthesized ZnO nanoparticles by the precipitation method from zinc sulphate heptahydrate and sodium hydrate as precursors.…”

Section: Introductionmentioning

confidence: 99%

Effect of zinc oxide nanoparticles synthesized by a precipitation method on mechanical and morphological properties of the CR foam

Suntako

2015

Bull Mater Sci

View full text Add to dashboard Cite

ZnO nanoparticles were synthesized by a precipitation method in aqueous media from zinc nitrate hexahydrate and sodium hydroxide. The synthesized ZnO nanoparticles exhibited a crystalline structure with hexagonal structure of the wurtzite. The morphology of the synthesized ZnO nanoparticles presented a spherical shape with the average primary size of 54.53 nm and the specific surface area of 20.28 m 2 g −1 . The effect of the synthesized ZnO nanoparticles by the precipitation method as a crosslinking agent for chloroprene rubber foam (CR foam) on cure characteristics, mechanical properties and morphologies was investigated. The aim of this study is to vary the synthesized ZnO nanoparticles' level in the range of 0.5-5 parts per hundred parts of rubber (phr) compared with the conventional ZnO at 5 phr. The rheological characterization showed that the maximum torque (M H ), the minimum torque (M L ), the differential torque (M H -M L ) and Mooney viscosity increased with the increase in synthesized ZnO nanoparticles' content, whereas the optimum cure time (t 90 ) and scorch time (T 5) decreased. On the other hand, the mechanical properties such as hardness, tensile strength and specific gravity were improved. For CR foam, the results compared to the amount of conventional ZnO, only 60 wt% (3 phr) nano-ZnO was enough to obtain similar cure characteristics and mechanical properties. The synthesized ZnO nanoparticles showed the mechanical properties higher than conventional ZnO because of small particle size and large specific surface area which led to the increase in the degree of crosslinking.

show abstract

Synthesis and microstructural properties of ZnO nanoparticles prepared by precipitation method

Cited by 296 publications

References 34 publications

Hydrothermal synthesis of flower cluster-shaped ZnO microstructures with sodium lignosulfonate as structure-directing agent

Hydrothermal synthesis of flower cluster-shaped ZnO microstructures with sodium lignosulfonate as structure-directing agent

Effect of solvents on ZnO nanostructures synthesized by solvothermal method assisted by microwave radiation: a photocatalytic study

Effect of zinc oxide nanoparticles synthesized by a precipitation method on mechanical and morphological properties of the CR foam

Contact Info

Product

Resources

About