PREPARATION AND CHARACTERIZATION OF ATO NANOPARTICLES BY COPRECIPITATION WITH MODIFIED DRYING METHOD

Shimin Liu, Dongdong Liang, Jindong Liu, Weiwei Jiang, Chaoqian Liu, Wanyu Ding, Hualin Wang and Nan Wang
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Shimin Liu: Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China
Dongdong Liang: Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China
Jindong Liu: Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China
Weiwei Jiang: Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China
Chaoqian Liu: Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China
Wanyu Ding: Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China
Hualin Wang: Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China
Nan Wang: Engineering Research Center of Optoelectronic Materials and Devices, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, P. R. China

Surface Review and Letters (SRL), 2017, vol. 24, issue 08, 1-7

Abstract: Antimony-doped tin oxide (ATO) nanoparticles were prepared by coprecipitation by packing drying and traditional direct drying (for comparison) methods. The as-prepared ATO nanoparticles were characterized by TG, XRD, EDS, TEM, HRTEM, BET, bulk density and electrical resistivity measurements. Results indicated that the ATO nanoparticles obtained by coprecipitation with direct drying method featured hard-agglomerated morphology, high bulk density, low surface area and low electrical resistivity, probably due to the direct liquid evaporation during drying, the fast shrinkage of the precipitate, the poor removal efficiency of liquid molecules and the hard agglomerate formation after calcination. Very differently, the ATO product obtained by the packing and drying method featured free-agglomerated morphology, low bulk density, high surface area and high electrical resistivity ascribed probably to the formed vapor cyclone environment and liquid evaporation-resistance, avoiding fast liquid removal and improving the removal efficiency of liquid molecules. The intrinsic formation mechanism of ATO nanoparticles from different drying methods was illustrated based on the dehydration process of ATO precipitates. Additionally, the packing and drying time played key roles in determining the bulk density, morphology and electrical conductivity of ATO nanoparticles.

Keywords: Sb doped SnO2 nanoparticles; drying; agglomeration; formation mechanism (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X17501177

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