Morphology of nanometric size particulate aluminium-doped zinc oxide films

Silva, Rodrigo Ferreira; Zaniquelli, Maria Elisabete Darbello

doi:10.1016/s0927-7757(01)00959-1

Cited by 92 publications

(32 citation statements)

References 30 publications

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“…The FT-IR spectrum of the Ag:ZnO nanocomposite material contains several bands with remarkable features. The bands between 400 and 750 cm −1 correlated to metal oxide bond (ZnO) [45][46][47]. Bands around 900-1500 cm −1 are due to the oxygen stretching and bending frequency [48,49] equal to those reported in the literature [50].…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

Synthesis of Silver-Doped Zinc Oxide Nanocomposite by Pulse Mode Ultrasonication and Its Characterization Studies

Vijayakumar

Karthikeyeni

Vasanth

et al. 2013

Journal of Nanoscience

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The synthesis of silver-doped zinc oxide (Ag:ZnO) nanocomposite material was achieved using a simple chemical coprecipitation method, in which 0.2 M zinc chloride and 0.001 M silver nitrate coprecipitated with 25% ammonia solution by pulse mode dispersion using ultrasonicator. The obtained silvery white precipitate was dried overnight at 110 ∘ C in hot air oven, and the powder was collected. The resulted Ag:ZnO nanocomposite was structurally and optically characterized using various techniques. The Xray diffraction (XRD) pattern clearly showed the presence of crystalline Ag:ZnO particles. Further, UV-Vis spectrophotometer and fourier transform infrared spectroscopy (FT-IR) results showed the presence of Ag:ZnO nanocomposite at specific wavelengths. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis confirm that the synthesized Ag:ZnO nanocomposite material was truncated nanorod in shape and has 48 to 226 nm size in diameter.

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Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

Synthesis of Silver-Doped Zinc Oxide Nanocomposite by Pulse Mode Ultrasonication and Its Characterization Studies

Vijayakumar

Karthikeyeni

Vasanth

et al. 2013

Journal of Nanoscience

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“…2 shows FTIR spectra of ZnO, and the ZnO-SWCNT(1 mg), ZnO-SWCNT(3 mg) and ZnO-SWCNT(5 mg) composite samples. The two peaks at 479 and 559 cm -1 correspond to vibrational modes of the ZnO nanostructure [11][12]. In addition, there were two minor bands at 3425 and 1636 cm -1 , which were attributed to hydrogen-bonded O-H molecules, and are characteristic stretching modes of C-H groups.…”

Section: Resultsmentioning

confidence: 96%

Synthesis of Zno/CNTS Nanocomposite Thin Film and Its Sensing

Sonker¹,

Chaudhary²

2016

Int. Jour. Appl. Bio-Eng.

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Semiconductor metal oxides (SMOs) with nanostructures as gas sensing material have been widely used in detection of toxic gases and vapours. The gas sensing properties of the SMO-based sensors are highly dependent not only on their surface chemical reactivity and thermal stability but also on the geometrical and compositional variation. Nitrogen dioxide (NO2) is a typical air pollutant that causes environmental problems. The exact detection of ultra-low concentrations of NO2 is becoming very important now days. In order to enhance the sensitivity of carbon nanotube based chemical sensors at room temperature operation, SWCNTs/ZnO nanocomposite was prepared under chemical reaction condition. The layer of deposition was applied for the spin coating of the inner and outer SWCNTs walls with thin films of ZnO of precisely controlled thicknesses. Differently treated SWCNTs with different degree of surface functionalization were used as support for the oxide films. The sensing properties of the obtained composite materials towards NO2 were investigated and related to the morphological and microstructural characteristics of both the coating and support. ZnO-based composites on SWCNTs treated at 300 °C show enhanced performance as sensors, making them suitable for practical applications. Sensor structure showed a better sensing response (S ~ 1.51×10 2 ) at operating room temperature towards 20 ppm NO2 gas with an average response times of about 2.45 min.

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“…Figure 6(a) shows the FTIR spectra of pure PANI. The caracterstics peaks are 1575 cm −1 due to C=C stretching mode of the quinoid rings, 1497 cm −1 due to C=C stretching mode of benzenoid rings, 1298 cm −1 due to C-N stretching mode and 1151 cm −1 due to N=Q=N, where Q represents the quionoid ring (Silva and Zaniquelli, 2002). The presence of the benzenoid and quinoid units is evidence of the emeraldine form of PANI.…”

Section: Ft-ir Analysismentioning

confidence: 96%

“…The absorption peak near 486 cm -1 is due to stretching vibrations of Zn-O bonds. The peaks at 3435 cm -1 and 2920 cm -1 indicate the presence of OH and C=O residues respectively, probably due to atmospheric moisture and CO2 respectively (Silva and Zaniquelli, 2002). Figure 6(a) shows the FTIR spectra of pure PANI.…”

Section: Ft-ir Analysismentioning

confidence: 99%

Photo-catalytic Removal of Methyl Orange Dye by Polyaniline Modified ZnO using Visible Radiation

Melaku¹,

Yadav²,

Kebede³

2014

Sci. Technol. Arts Res. J.

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Article InformationPolyaniline modified zinc oxide (PANI/ZnO) nanocomposite was synthesized by in-situ polymerization process. The as-synthesized nano-ZnO, PANI and PANI/ZnO nanocomposite were characterized by X-ray diffraction (XRD), FT-IR, and UV-Vis spectroscopy. The UV-visible spectroscopy studies showed that the absorption peak for PANI/ZnO nanocomposite has a red shift toward visible wavelengths compared with the ZnO nanoparticles and PANI. Photocatalytic efficiency of PANI/ZnO nanocomposite was investigated for the degradation of methyl orange (MeO) dye as a model organic compound under Visible light irradiation. The photocatalytic activities of ZnO, PANI and PANI/ZnO nanocomposite were studied. The results showed that ZnO/PANI nanocomposite had greater photocatalytic activity than ZnO nanoparticles and PANI under visible light irradiation. According to these results, application of PANI as a shell on the surface of ZnO nanoparticles causes the enhanced photocatalytic activity of the PANI/ZnO nanocomposite. Influence of some operational parameters such as: amount of photocatalyst, pH of solution, and MeO dye initial concentration on the photodegradation reaction rate was investigated.The optimum values of pH and catalyst dose found to be 6 and 1.50 gmL -1 respectively. It was demonstrated that the photocatalytic degradation of MeO follows pseudo first-order kinetics. The PANI/ZnO nanocomposite photocatalysts have good photocatalytic stability and can be reused three times with only gradual loss of activity. Thus, the PANI/ZnO nanocomposites are efficient photocatalytic materials for degrading contaminated colored wastewater for reuse in textile industries under mild conditions.

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Morphology of nanometric size particulate aluminium-doped zinc oxide films

Cited by 92 publications

References 30 publications

Synthesis of Silver-Doped Zinc Oxide Nanocomposite by Pulse Mode Ultrasonication and Its Characterization Studies

Synthesis of Silver-Doped Zinc Oxide Nanocomposite by Pulse Mode Ultrasonication and Its Characterization Studies

Synthesis of Zno/CNTS Nanocomposite Thin Film and Its Sensing

Photo-catalytic Removal of Methyl Orange Dye by Polyaniline Modified ZnO using Visible Radiation

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