Preparation and characterization of Co-doped ZnO nanomaterials

Yang, Huaming; Nie, Sha

doi:10.1016/j.matchemphys.2008.09.017

Cited by 81 publications

(33 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The second downward peak in heat flow graph and further decrease of mass was observed at 178.54°C and 190.64°C in weight curve, which represent decompositions of Zn(OH) 2 approximately 500°C due to the evaporation of water of crystallization. These results were in good agreement with the literature [13]. The crystallization occurs during the removal of water molecules.…”

Section: Methodssupporting

confidence: 93%

Effect of doping concentration on absorbance, structural, and magnetic properties of cobalt-doped ZnO nano-crystallites

et al. 2012

View full text Add to dashboard Cite

Controlled conduction of magnetic spins is desired for data processing in modern spintronic devices. Transition metal-doped ZnO is a potential candidate for this purpose. We studied the effects of cobalt doping on structural, absorbance, and magnetic properties of ZnO nano-particles. Different compositions (Zn 0.99 Co 0.1 O, Zn 0.97 Co 0.3 O, and Zn 0.95 Co 0.5 O) of cobalt-doped ZnO were fabricated using metallic chlorides by co-precipitation method. XRD revealed standard ZnO wurtzite crystal structure without lattice distortion due to impurities but showed presence of additional phases at higher doping ratios. Fourier transformed infrared spectroscopy also confirmed the standard ZnO profiles at lower doping ratios but additional phases at higher doping. Vibrating sample magnetometer showed soft ferromagnetic behavior for low impurity samples and harder ferromagnetic behavior for higher doping at room temperature. A simultaneous differential scanning calorimetry/thermo gravimetric analysis was performed to study the phase variations during crystallization.

show abstract

Section: Methodssupporting

confidence: 93%

Effect of doping concentration on absorbance, structural, and magnetic properties of cobalt-doped ZnO nano-crystallites

et al. 2012

View full text Add to dashboard Cite

show abstract

“…However, the ZnO doped with 1% mol of Ag (C2) revealed new peaks with weak intensities at 38.20°and 44.62°, as it was reported by Zeferino et al [13]. e doping concentration of 2% to 10% mole of Co-Ag (C5 and C6) can lead to the formation of Co 3 O 4 with a corresponding trace at 64.66° [14]. Table 1 summarizes the position and the width at midheight (FWHM) of the main peaks, along with the lattice parameter values calculated from the XRD patterns of the pure and codoped ZnO nanopowders.…”

Section: Catalytic Activitysupporting

confidence: 57%

Selective Oxidation of Styrene to Benzaldehyde by Co‐Ag Codoped ZnO Catalyst and H₂O₂ as Oxidant

Aberkouks¹,

Mekkaoui

Boualy

et al. 2018

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Various ratio of Co-Ag supported on ZnO have been evaluated in the selective catalytic oxidation of styrene to benzaldehyde, using H 2 O 2 as an oxidant. e catalysts were prepared by a sol-gel process and were characterized using XRD, FT-IR, TG-DTG, BET, and SEM/EDX. e performance of the prepared catalyst was investigated under different parameters such as solvent, temperature, substrate/oxidant molar ratios, reaction time, and doping percent. e Zn 1−x−y Ag x Co y O catalysts exhibit a good activity and a high selectivity towards benzaldehyde (95%) with the formation of only 5% of acetophenone.

show abstract

“…Compared with the pure ZnO, Mn doping in ZnO samples results in a slight decrease in the crystallite size. Yang et al [ 11 ] and Staumal et al [ 12 ] have also reported that increase of Mn content in ZnO leads to a smaller particle size.…”

mentioning

confidence: 95%

Manganese-doped Zinc Oxide Nanopowders for Photocatalytic Decoloration of Reactive Black 5 Textile Dye

Milenova¹,

Kunev²,

Blaskov³

et al. 2013

Proceeding BAS

View full text Add to dashboard Cite

Zinc oxide photocatalysts doped with manganese (0.04-1 at.%) were synthesized via precipitation technique. Their characteristics were studied by Xray diffraction (XRD) and BET analysis. The calculated mean size of the crystallites was in the range of 31-45 nm. Manganese doping of ZnO samples results in slight decrease in crystalline size. Increasing the Mn content in ZnO powders results in a lower photocatalytic activity. The pure ZnO nanopowders decolorate Reactive Black 5 dye under ultraviolet light to almost 92% for 2 h.

show abstract

Preparation and characterization of Co-doped ZnO nanomaterials

Cited by 81 publications

References 16 publications

Effect of doping concentration on absorbance, structural, and magnetic properties of cobalt-doped ZnO nano-crystallites

Effect of doping concentration on absorbance, structural, and magnetic properties of cobalt-doped ZnO nano-crystallites

Selective Oxidation of Styrene to Benzaldehyde by Co‐Ag Codoped ZnO Catalyst and H₂O₂ as Oxidant

Manganese-doped Zinc Oxide Nanopowders for Photocatalytic Decoloration of Reactive Black 5 Textile Dye

Contact Info

Product

Resources

About

Preparation and characterization of Co-doped ZnO nanomaterials

Cited by 81 publications

References 16 publications

Effect of doping concentration on absorbance, structural, and magnetic properties of cobalt-doped ZnO nano-crystallites

Effect of doping concentration on absorbance, structural, and magnetic properties of cobalt-doped ZnO nano-crystallites

Selective Oxidation of Styrene to Benzaldehyde by Co‐Ag Codoped ZnO Catalyst and H2O2 as Oxidant

Manganese-doped Zinc Oxide Nanopowders for Photocatalytic Decoloration of Reactive Black 5 Textile Dye

Contact Info

Product

Resources

About

Selective Oxidation of Styrene to Benzaldehyde by Co‐Ag Codoped ZnO Catalyst and H₂O₂ as Oxidant