Room-temperature synthesis of zinc oxide nanoparticles in different media and their application in cyanide photodegradation

Bagabas, Abdulaziz; Alshammari, Ahmad S.; Aboud, Mohamed F. Aly; Kosslick, H.

doi:10.1186/1556-276x-8-516

Cited by 116 publications

(61 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…4 shows TEM (transmission electron microscopy) images and SAED (selected area electron diffraction) patterns of ZnO nanocrystals. Bagabas et al [19] reported that clear morphology was observed for the calcined samples and not in the case of uncalcined samples. But, it is clearly observed from the images that the particles have hexagonal (wurtzite) structure and average particle size of the nanocrystals synthesized by method I was smaller than the nanocrystals by method II.…”

Section: Resultsmentioning

confidence: 95%

Comparative study on zinc oxide nanocrystals synthesized by two precipitation methods

2018

View full text Add to dashboard Cite

Zinc oxide nanocrystals were synthesized by two precipitation methods successfully. The nanocrystals prepared via method I (zinc acetate dihydrate precipitation with KOH) were smaller in crystallite size (~20 nm) as compared to method II (zinc nitrate hexahydrate precipitation with N,N-dimethylformamide, ~33 nm). FTIR technique was used to study chemical bonding; SEM and EDS were used to study morphology and chemical compositions. Number of concentric rings corresponding to diffraction peaks was higher in SAED pattern for ZnO nanocrystals synthesized by method I than II. Variation in the energy band gap as a function of particle size was determined using absorption spectra from UV-vis-NIR spectrophotometer. Redshift was observed in the energy band gap of sample prepared via method II. Particle size and the structure of the nanocrystals were analysed by transmission electron microscope (TEM). From TEM study, it was found that the average particle size of method I nanocrystals was smaller compared to method II nanocrystals. Magnetic study was carried out using VSM. Ferromagnetism like contribution was observed for the sample prepared by method II.

show abstract

Section: Resultsmentioning

confidence: 95%

Comparative study on zinc oxide nanocrystals synthesized by two precipitation methods

2018

View full text Add to dashboard Cite

show abstract

“…Intensive studies have been done on various factors, such as precursor concentrations [8,9], temperature [10,11], duration [12], surfactant concentration [7], dopant concentration [6], solvent medium [13], pH of reaction mixture [14] and source of light during synthesis [15], which individually and collectively affect the shape, size and optical properties of ZnO. Various researchers [16][17][18] suggested that NaOH concentration plays a vital role in determining the morphology, size and optical bandgap of obtained nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Effect of NaOH concentration on optical properties of zinc oxide nanoparticles

Koutu

Shastri

Malik

2016

Materials Science-Poland

102

View full text Add to dashboard Cite

In the present work, powder zinc oxide samples were prepared by varying NaOH concentration (0.1 M -0.4 M) using wet-chemical co-precipitation method. As-synthesized ZnO was characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), photoluminescence (PL) and Raman spectroscopy. Formation of hexagonal wurtzite structure of the ZnO samples has been revealed from XRD studies. This study further suggests reduction in crystallite size from 40 nm to 23 nm with an increase in NaOH concentration which is confirmed by FESEM. PL and Raman spectroscopy studies of these samples show significant peak shift towards the higher and lower energy respectively, with maximum PL emission between 400 nm and 470 nm region of the visible spectrum. Noticeable inverse relationship between optical properties of ZnO nanoparticles and NaOH concentration may be attributed to the rapid nucleation during the synthesis process. With these remarkable properties, ZnO nanoparticles may find applications in nanoelectronic devices, sensors, nanomedicine, GATE dielectrics, photovoltaic devices, etc.

show abstract

“…It is quite obvious that the extent of porosity (V p: Z 2 > Z 4 > Z 1 > Z 8) and not the pore size (D p: Z 2 > Z 4 > Z 1 ≈ Z 8) is the determining factor for the S BET (NPs with needle-like shape have the highest V p). It is also noticeable that the ZnO synthesized in microemulsion possess V p much higher than those prepared in other polar solvents such as water or ethanol [19]. The doublet Zn 2p spectrum in Figure 5 shows binding energies of 1,021.1 and 1,044.2 eV, which referred to Zn-2p3/2…”

Section: Samples Bet(m2 G−1)d P(nm)v P(cm3 G−1)l (Nm)ad (Nm)mentioning

confidence: 95%

In situ growth of ZnO nanoparticles in precursor-insensitive water-in-oil microemulsion as soft nanoreactors

Bumajdad¹,

Madkour²

2016

Nano Online

View full text Add to dashboard Cite

(http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.Zinc oxide (ZnO) nanostructures of uniform shapes and sizes (spherical, needle-like, and acicular) were directly synthesized using a relatively precursor-insensitive waterin-n-heptane microemulsion system stabilized by a mixture of cationic and non-ionic surfactants. With this colloidal system, the synthesized ZnO possesses the highest reported surface area (76 m2 g−1) among the published reports utilizing other microemulsion systems. Such precursor insensitivity allowed studying the effect of Zn precursor:precipitating agent molar ratio (as high as 1:8) on the particle size, specific surface area, porosity, and morphology of the synthesized nanoparticles. The interaction of the cationic surfactant head groups and their Br− counter ions with Zn2+ and OH− ions is believed to play a major role in controlling the ZnO characteristics.Due to such interactions, it is believed that the nucleation processes are retarded while the growth is more dominating if compared with other microemulsion systems.

show abstract

Room-temperature synthesis of zinc oxide nanoparticles in different media and their application in cyanide photodegradation

Cited by 116 publications

References 40 publications

Comparative study on zinc oxide nanocrystals synthesized by two precipitation methods

Comparative study on zinc oxide nanocrystals synthesized by two precipitation methods

Effect of NaOH concentration on optical properties of zinc oxide nanoparticles

In situ growth of ZnO nanoparticles in precursor-insensitive water-in-oil microemulsion as soft nanoreactors

Contact Info

Product

Resources

About