Synthesis and characterization of nano-sized ZnO powders by direct precipitation method

2008 ◽  
Vol 144 (3) ◽  
pp. 509-513 ◽  
Author(s):  
ChangChun Chen ◽  
Ping Liu ◽  
ChunHua Lu
Keyword(s):  
Precipitation Method ◽  
Synthesis And Characterization ◽  
Direct Precipitation ◽  
Zno Powders ◽  
Direct Precipitation Method

Synthesis and Characterization of Nanocrystalline SnO2 Powder

2011 ◽  
Vol 675-677 ◽  
pp. 267-270
Author(s):  
Shi Min Liu ◽  
Wan Yu Ding ◽  
Wei Wei Jiang ◽  
Wei Ping Chai
Keyword(s):  
Morphological Properties ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Direct Precipitation ◽  
Transmission Electron ◽  
Crystal Structural ◽  
Sno2 Powder ◽  
Direct Precipitation Method

Nanocrystalline SnO2 powder has been synthesized via direct precipitation method starting from Sn, HNO3, HCl, and NH4OH. Thermal properties, crystal structural and morphological properties of the precursor and SnO2 powder were investigated using simultaneous thermogravimetry-differential thermal analysis, X-ray diffraction and transmission electron microscopy. The results indicated that the precursor was SnO2 rather than Sn(OH)2 or Sn(OH)4. On the basis of the precursor, well crystallized SnO2 powder with 4-5 nm in diameter was obtained, after calcined at 350 °C for 2 h.

Synthesis and Characterization of Nanocrystalline ZnO Powders by a Direct Thermal Decomposition Route Using Zinc Nitrate Hexahydrate

2013 ◽  
Vol 770 ◽  
pp. 68-71 ◽  
Author(s):  
Supphadate Sujinnapram ◽  
Uraiphorn Termsuk ◽  
Atcharawan Charoentam ◽  
Sutthipoj Sutthana
Keyword(s):  
Thermal Decomposition ◽  
Crystallization Temperature ◽  
Zinc Nitrate ◽  
Zinc Nitrate Hexahydrate ◽  
Absorption Peak ◽  
Synthesis And Characterization ◽  
Nitrate Hexahydrate ◽  
Different Temperatures ◽  
Zno Powders

The nanocrystalline ZnO powders were synthesized by a direct thermal decomposition using zinc nitrate hexahydrate as starting materials. The precursor was characterized by TG-DTA to determine the thermal decomposition and crystallization temperature which was found to be at 325 oC. The precursors were calcined at different temperatures of 400, 500, and 600°C for 4 h. The structure of the prepared samples was studied by XRD, confirming the formation of wurtzite structure. The synthesized powders exhibited the UV absorption below 400 nm (3.10 eV) with a well defined absorption peak at around 285 nm (4.35 eV). The estimated direct bandgaps were obtained to be 3.19, 3.16, and 3.14 eV for the ZnO samples thermally decomposed at 400, 500, and 600°C, respectively.

Synthesis and characterization of Eu[sup 3+]:YAG nanopowder by precipitation method

2013 ◽  
Author(s):  
D. Balaji ◽  
D. Thangaraju ◽  
A. Durairajan ◽  
S. Moorthy Babu
Keyword(s):  
Precipitation Method ◽  
Synthesis And Characterization

Synthesis and Characterization of Cerium Oxide (CeO2) Nanoparticles

2009 ◽  
Vol 609 ◽  
pp. 189-194 ◽  
Author(s):  
C. Benmouhoub ◽  
A. Kadri ◽  
N. Benbrahim ◽  
S. Hadji
Keyword(s):  
Crystallite Size ◽  
Cerium Oxide ◽  
Ceo2 Nanoparticles ◽  
Precipitation Method ◽  
Synthesis And Characterization

Nanoparticles of cerium oxide (CeO2) are synthesized with cerium (III) nitrates (Ce(NO3)3, 6H2O) by precipitation method in ammonium hydroxyl solution (NH4OH). The influence of several parameters such as nature of the solvent, synthesizing temperature and the calcination on the crystallite size is studied by XRD, TEM and BET methods. The results show that both calcinations and synthesizing temperature affect the particles size. Also, the nature of solvent has a great effect on the morphology of CeO2 nanoparticles.

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