Effect of Hydroxide Concentration and Adding Ascorbic Acid on Morphology Shape of Zinc Oxide Nanostructure Prepared by Simple Chemical Precipitation Method

2016 ◽  
Vol 848 ◽  
pp. 76-79
Author(s):  
Natpasit Chaithanatkun ◽  
Korakot Onlaor ◽  
Thutiyaporn Thiwawong ◽  
Benchapol Tunhoo
Keyword(s):  
Ascorbic Acid ◽  
Zinc Oxide ◽  
Ammonium Hydroxide ◽  
Chemical Precipitation ◽  
Zinc Nitrate ◽  
Chemical Precipitation Method ◽  
Precipitation Method ◽  
Directional Growth ◽  
Zno Nanostructure ◽  
Xrd Techniques

A chemical precipitation method was used to prepare zinc oxide (ZnO) nanostructure in the present of zinc nitrate and ammonium hydroxide as zinc precursor and hydroxide precursor respectively. The effect of the hydroxide concentration and the effect of adding ascorbic acid as modifier into the mixture solution on the morphology property of zinc oxide was studied. The morphology and the structural of ZnO nanostructures were investigated by field-emission scanning electron microscope (FE-SEM) and X-ray diffractometer (XRD) techniques, respectively. The results showed that the basicity solution and adding stabilizer are important parameters on the morphology and structural properties of ZnO nanostructure. At a low hydroxide concentration, ZnO exhibited flower-like structure with short petal. With a further increase to higher concentration, ZnO crystal have more crystal directional growth. When the ascorbic acid was added, the morphology changed to particle-like structure. ZnO nanostructure with different shape might be used for specific applications such as gas sensor etc.

Influence of Zinc Substitution on Hydroxyapatite Structure Prepared by Chemical Precipitation Method

2018 ◽  
Vol 879 ◽  
pp. 3-7 ◽  
Author(s):  
Nisakorn Nuamsrinuan ◽  
Patcharin Naemchanthara ◽  
Pichet Limsuwan ◽  
Kittisakchai Naemchanthara
Keyword(s):  
Heat Treatment ◽  
Fourier Transforms ◽  
Chemical Precipitation ◽  
Zinc Nitrate ◽  
Treatment Temperature ◽  
Chemical Precipitation Method ◽  
Precipitation Method ◽  
Phosphate Phase ◽  
Chicken Eggshell ◽  
Hydroxyapatite Phase

The zinc (Zn) substituted hydroxyapatite were synthesized using a chemical precipitation method. The chemical precursors were prepared from di-ammonium hydrogen orthophosphate, calcium oxide (CaO) derived from chicken eggshell and zinc nitrate (Zn(NO3)2). The Zn(NO3)2contents in the prepared samples were varied from 1 to 25 %wt of CaO. The Zn substituted hydroxyapatite were heated at the various temperatures from 200 to 1300 °C in the furnace with an incremental temperature of 100 °C. The crystal structure, function group and morphology of sample were analyzed by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM), respectively. The results show that the hydroxyapatite doped Zn was a hydroxyapatite phase as well as pure hydroxyapatite. The crystalline size of sample decreased with increasing the Zn content. And, the crystallinity of hydroxyapatite phase was increased following by increasing heat treatment temperature. However, the amount of Zn has the effect on phase transformation of hydroxyapatite phase after heat treatment. Zn concentration accelerates hydroxyapatite transforms to β-tricalcium phosphate phase.

Effect of pH on Zinc Oxide Powder Prepared by a Chemical Co-Precipitation Method

2010 ◽  
Vol 93-94 ◽  
pp. 691-694 ◽  
Author(s):  
Pusit Pookmanee ◽  
Issara Attaveerapat ◽  
Jiraporn Kittikul ◽  
Sukon Phanichphant
Keyword(s):  
Zinc Oxide ◽  
Average Particle Size ◽  
Ammonium Hydroxide ◽  
Zinc Nitrate ◽  
Oxide Powder ◽  
Precipitation Method ◽  
Average Particle ◽  
X Ray ◽  
Zinc Oxide Powder ◽  
Co Precipitation

Zinc oxide powder was prepared by a chemical co-precipitation method. Zinc nitrate and ammonium hydroxide were used as the starting precursors. The white precipitated powder was formed after adding ammonium hydroxide until the pH of final solution was 7-9. The powder was filtered and dried at 100 °C for 24h. The phase of zinc oxide powder was studied by X-ray diffractometer (XRD). Hexagonal single phase of zinc oxide was obtained without calcination step. The morphology of zinc oxide powder was investigated by scanning electron microscope (SEM). The particle was irregular in shape and highly agglomerated with an average particle size of 0.1 µm. The chemical composition of zinc oxide powder was determined by energy dispersive X-ray spectrometer (EDXS). The elemental composition of zinc oxide showed the characteristic X-ray energy value as follows: zinc of Lα = 1.012 keV, Kα = 8.630 keV and Kβ = 9.570 keV and oxygen of Kα = 0.525 keV, respectively.

Modification of Structural and Vibrational Properties of ZnO Nanoparticles Prepared by Simple Chemical Precipitation Method

2016 ◽  
Vol 675-676 ◽  
pp. 138-141 ◽  
Author(s):  
Natpasit Chaithanatkun ◽  
Korakot Onlaor ◽  
Thutiyaporn Thiwawong ◽  
Benchapol Tunhoo
Keyword(s):  
Electron Microscope ◽  
Vitamin C ◽  
Structural Properties ◽  
Zno Nanoparticles ◽  
Hexagonal Phase ◽  
Chemical Precipitation ◽  
Zinc Nitrate ◽  
Chemical Precipitation Method ◽  
Precipitation Method ◽  
Simple Chemical

In this work, zinc oxide (ZnO) nanoparticles were synthesized by simple chemical precipitation method in the present of zinc nitrate as zinc precursor and sodium hydroxide as hydroxide precursor. The vitamin C was used as modifier media to modify the structural properties of ZnO nanoparticles. The microstructures of ZnO nanoparticles were characterized by field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM). Selected area electron diffraction (SAED) patterns showed that polycrystalline hexagonal phase of ZnO. The defects and impurity contents in nanoparticles were investigated by Fourier transform infrared (FT-IR) spectroscopy. The results show few carboxylate and hydroxyl impurities for larger particles when addition modifier increases. Surface areas of nanoparticles were measured by Brunauer Emmett Teller (BET) method. In addition, the results exhibited the dramatically change in structural properties of ZnO nanoparticles due to the effect of vitamin C.

scholarly journals Estimation of Particle Size and Band Gap of Zinc Oxide Nanoparticle Synthesized by Chemical Precipitation Method

2020 ◽  
Vol 41 (1) ◽  
pp. 46-50
Author(s):  
Surendra K. Gautam ◽  
Bibek Sapkota ◽  
Arun Bhujel ◽  
Sitaram Bhattarai
Keyword(s):  
Particle Size ◽  
Zinc Oxide ◽  
Band Gap ◽  
Zno Nanoparticles ◽  
Hexagonal Wurtzite Structure ◽  
Chemical Precipitation ◽  
Chemical Precipitation Method ◽  
Precipitation Method ◽  
X Ray ◽  
Uv Visible

Zinc oxide (ZnO) nanoparticles were synthesized by chemical precipitation method using 0.1M and 0.3M [Zn(NO3)2.6H2O] and Na2CO3 solutions. The particle size and band gap of ZnO nanoparticles were estimated and effect of concentration on it was investigated. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM), Energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR) and UV-visible spectroscopy. The XRD result revealed that synthesized ZnO nanoparticles have pure hexagonal wurtzite structure and the particle size varies from 27.0 nm to 29.9 nm estimated by using Debye-Scherrer’s equation. The TEM image also projected the average particle size in the range of 20-30 nm and selected area electron diffraction (SAED) further verified the formation of hexagonal wurtzite structure. The FTIR result showed a broad absorption band related to Zn-O vibration band. The UV-visible absorption showed a red shift in the absorption edge with increasing concentration of Zn(NO3)2.6H2O solution. The sizes and band gaps of ZnO nanoparticles increased and decreased, respectively with increasing concentration of Zn(NO3)2.6H2O solution from 0.1M to 0.3M.

scholarly journals Using Co-Precipitation Method Determining Synthesis and Characterization of Fe Doped Zinc Oxide Nanoparticles

2019 ◽  
Vol 8 (9S3) ◽  
pp. 705-707
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Room Temperature ◽  
Chemical Precipitation ◽  
Zinc Nitrate ◽  
Precipitation Method ◽  
Ferric Nitrate ◽  
Doped Zno ◽  
Co Precipitation

In through concoction co-precipitation strategy using ferric nitrate, zinc nitrate and sodium hydroxide in fluid arrangements, orchestrate and portrayal of Fe doped ZnO nanoparticles were prepared in the present work. X-beam diffraction has confirmed the growth of Fe doped ZnO from the precursor. This result has revealed that nanoparticles have integrated excellent crystalline forces in nature. SEM investigations show that ZnO nanoparticles have been doped by the round and minimally agglomerated Fe. Room temperature powerless ferromagnetism, distinctive in the appealing characteristics of Fe doped ZnO powderKeywords in relation to room temperature: zinc oxide, SEM, chemical precipitation, XRD, VSM

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