Optoelectronic properties and temperature dependent mechanisms of composite-hydroxide-mediated approach for the synthesis of CdO nanomaterials

Khan, Taj Muhammad; Shahid, Tauseef; Zakria, M.; Shakoor, Rana I.

doi:10.1007/s13391-015-4134-x

Cited by 34 publications

(14 citation statements)

References 28 publications

(34 reference statements)

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“…1 Recently, this method has been used to prepare a variety of nanostructures including BaTiO 3 , CdO, ZnO, NiO, and so on. 2 –5 Shahid et al have applied this method to prepare Zn(II)-CuO composite and probed the structural and optical properties. 6 The reported results show that the method seems to be a feasible and an effective route to produce various composites directly during the synthesis process.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and physical properties of functional barium carbonate nanostructures by a facile composite-hydroxide-mediated route

Shahid

Arfan

Zeb

et al. 2018

Nanomaterials and Nanotechnology

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Recently, barium carbonate nanomaterial has been shown to be a proven versatile candidate for the catalysis and sensor applications. The catalytic and sensing efficiency can be improved by making barium carbonate composite with a suitable transition element. In this regard, the preparation of barium carbonate and its composite with nickel during the synthesis process is presented with the composite-hydroxide-mediated method, an effective, feasible, and low-temperature synthesis route. The nanomaterial produced is monitored for the structural and optical properties with various diagnostic methods. The X-ray diffraction results show the presence of orthorhombic structure of barium carbonate in both pure and 5% nickel samples. A mixed structure is formed with the phases of barium carbonate, Ba(NO 3 ) 2 , and Ni(NO 3 ) 2 for the sample with 15% nickel. The average crystallite size estimated is in the range of 14-22 nm. The scanning electron microscope pictures captured on silicon (Si) covered with the product material reveal interesting rods, needle, and flower-type morphological features. The bandgap energy obtained by diffused reflectance spectroscopy is in the expected range of 5.48-5.71 eV. The proposed method seems effective to provide a feasible route for the synthesis of a broad range of nanomaterials for research purposes.

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Section: Introductionmentioning

confidence: 99%

“…The present paper is closely relevant to the work previously done in the group. 2 –6 The aim of the work is to further investigate potential of the method for a large production of various nanomaterials for research purposes.…”

Section: Introductionmentioning

confidence: 99%

Preparation and physical properties of functional barium carbonate nanostructures by a facile composite-hydroxide-mediated route

Shahid

Arfan

Zeb

et al. 2018

Nanomaterials and Nanotechnology

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“…The additional bands located at 438, 467 and 578 cm -1 are related to SnO 2 nanostructures. The Raman bands at 438 and 467 cm -1 can be assigned to E g vibrational modes of SnO 2 nanostructures, and the band located at * 578 cm -1 may be assigned to A 1g mode of SnO 2 [37]. The Raman spectrum of (1-x)CdO-xSnO 2 nanocomposites for x = 0.15 shown in Fig.…”

Section: Raman Spectroscopymentioning

confidence: 97%

Synthesis and Characterization of CdO–SnO2 Nanocomposites Prepared by Hydrothermal Method

Sirohi

Kumar

Singh

et al. 2017

Acta Metall. Sin. (Engl. Lett.)

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In this work, (1-x)CdO-xSnO 2 nanocomposites (B 0.15) have been synthesized via hydrothermal route. The structural study reveals that CdO nanostructures possess crystalline phase and cubic structure. The CdO-SnO 2 nanocomposites possess both cubic and orthorhombic structure with good crystallinity. The crystallite size in the nanocomposites was found to be in the range of 9.6-19.6 nm. Field emission scanning electronic microscopy and highresolution tunnelling microscopy analysis confirm the presence of both cubic and orthorhombic structures which is also confirmed from X-ray diffraction studies. Fourier transform infrared spectroscopy (FTIR) studies confirm that CdO-SnO 2 nanocomposites possess the characteristics band of both CdO and SnO 2 nanostructures. The UV-visible absorption studies confirm that the optical absorption band in CdO-SnO 2 nanocomposites possesses both blue and red shift as compared to that of CdO nanostructures. Photoluminescence spectroscopy studies reveal the appearance of strong emission peak at 513, 469 and 369 nm corresponding to green, blue and violet emission spectrum, respectively, in CdO-SnO 2 nanocomposites. The FTIR studies confirm the presence of hydroxyl and water functional group due to atmospheric water vapours and chemical bonding in CdO and CdO-SnO 2 nanocomposites. Raman spectroscopy confirms the presence of Raman bands of both CdO and SnO 2 phases in the CdO-SnO 2 nanocomposites.

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“…The main source materials used for this experiment are; Ni (NO 3 ) 2 .6H 2 O, NaOH, and KOH. The synthesis procedure has been given in our previous reports [32][33][34]. Briefly, for the synthesis of NiO, an appropriate amount of mixed hydroxide (NaOH: KOH=51.5:48.5) were added in a Teflon beaker, and covered beaker was then placed in an electric furnace at 180 o C followed by further experiments at temperatures; 200°C, 220°C, and 250°C.…”

Section: Synthesis Of Nio Nanomaterialsmentioning

confidence: 99%

“…This method has the advantages to synthesize functional nanowires, nanorods, nanobelts and several other oxide nanostructures. Recently, Khan et al applied this method for the synthesis of CdO and ZnO nanostructures and a temperature dependent study was established [32,33]. Previously in our group, a comprehensive study was done on the feasibility of CHM approach for the synthesis of doped Cu 1-x Zn x O nanostructures [34].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Pyramid-Shaped NiO Nanostructures using Low-Temperature Composite- Hydroxide- Mediated Approach

Shahid¹,

Khan²,

Zakria³

et al. 2016

J Material Sci Eng

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Composite-hydroxide-mediated (CHM) approach was used to synthesize NiO nanocrystals. The proposed method makes use of molten composite hydroxides; providing reaction media and lower the process temperature. Processing temperature and reaction time are the two potential parameters to control the growth of a nanomaterial. The method was used at temperatures in the range of 180-250°C and formation of the nanomaterial was monitored using XRD, SEM, EDX, FTIR, and UV-visible spectroscopy. The produced nanomaterial was purely polycrystalline with an average crystallite size in the range of 23.71-36.92 nm. Method suggested formation of pyramid shaped NiO nanocrystals in the temperature range 220-250°C. Evidence on the elemental composition, purity, and chemical bonding were obtained from EDX and FTIR analysis respectively. Estimation on direct bandgap was made from the optical analysis and found to be in the range 4.0-4.8 eV. The method is attractive and seems a cost effective route for the growth of transition metal oxides for research purpose. For further efficacy, the approach can be examined for other technologically significant nanostructures.

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Optoelectronic properties and temperature dependent mechanisms of composite-hydroxide-mediated approach for the synthesis of CdO nanomaterials

Cited by 34 publications

References 28 publications

Preparation and physical properties of functional barium carbonate nanostructures by a facile composite-hydroxide-mediated route

Preparation and physical properties of functional barium carbonate nanostructures by a facile composite-hydroxide-mediated route

Synthesis and Characterization of CdO–SnO2 Nanocomposites Prepared by Hydrothermal Method

Synthesis of Pyramid-Shaped NiO Nanostructures using Low-Temperature Composite- Hydroxide- Mediated Approach

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