Synthesis of Tin Oxide Nanostructures with Controlled Particle Size Using Mesoporous Frameworks

Cabot, Andreu; Arbiol, Jordi; Rossinyol, Emma; Morante, J.R.; Chen, Fanglin; Liu, Meilin

doi:10.1149/1.1664054

Cited by 24 publications

(14 citation statements)

References 20 publications

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“…Therefore, the higher the temperature, the higher the particle size. This behavior was expected because the heating facilitates the diffusion and agglomeration of the particles [36][37][38]. Fig.…”

Section: Resultsmentioning

confidence: 82%

Synthesis and characterization of NiO and nanoparticles obtained by a sucrose-based route

Souza

Duque

Kubota

et al. 2007

Journal of Physics and Chemistry of Solids

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Section: Resultsmentioning

confidence: 82%

Synthesis and characterization of NiO and nanoparticles obtained by a sucrose-based route

Souza

Duque

Kubota

et al. 2007

Journal of Physics and Chemistry of Solids

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“…Such a physical corseting avoids large particle formation, coalescence, and agglomeration, while allowing the structure stabilization and incorporating oxygen into the lattice. 7 Optical, chemical and electrical properties of thus obtained nanostructures have been examined by means of ultravioletvisible ͑UV-vis͒ diffuse reflectance, x-ray photoelectron spectroscopy ͑XPS͒, and conductance measurements.…”

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confidence: 99%

“…7 The templates used were SBA-15 structures stabilized at 550°C. The nitrate compound was introduced in different successive steps by impregnation of the silica with an aqueous solution of tin-oxalate and nitric acid at a 1:3 molar ratio.…”

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confidence: 99%

Surface states in template synthesized tin oxide nanoparticles

Cabot

Arbiol

Ferré

et al. 2004

Journal of Applied Physics

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Tin-oxide nanoparticles with controlled narrow size distributions are synthesized while physically encapsulated inside silica mesoporous templates. By means of ultraviolet-visible spectroscopy, a redshift of the optical absorbance edge is observed. Photoluminescence measurements corroborate the existence of an optical transition at 3.2 eV. The associated band of states in the semiconductor gap is present even on template-synthesized nanopowders calcined at 800°C, which contrasts with the evolution of the gap states measured on materials obtained by other methods. The gap states are thus considered to be surface localized, disappearing with surface faceting or being hidden by the surface-to-bulk ratio decrease.

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“…This approach is based on the use of nanostructured In 2 O 3 and WO 3 obtained as replicas of mesoporous templates [11,12]. This method produces minute nanograins ordered in a network that facilitates gas diffusion through it, maintains the chemical sensing homogeneity, avoids grain agglomeration and diminishes grain boundary effects [13][14][15].…”

Section: Journal Of Sensorsmentioning

confidence: 99%

Shrinkage Effects of the Conduction Zone in the Electrical Properties of Metal Oxide Nanocrystals: The Basis for Room Temperature Conductometric Gas Sensor

et al. 2009

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The influence of charge localized at the surface of minute metal oxide nanocrystals was studied in WO 3 and In 2 O 3 nanostructures, which were obtained replicating mesoporous silica templates. Here, it is shown that the very high resistive states observed at room temperature and dark conditions were originated by the total shrinkage of the conductive zone in the inner part of these nanocrystals. On the contrary, at room temperature and under UV illumination, both photogenerated electron-hole pairs and empty surface states generated by photons diminished the negative charge accumulated at the surface, enlarging the conductive zone and, as a consequence, leading to a reduction of the electrical resistance. Under these conditions, empty surface states produced by UV light reacted with oxidizing gaseous molecules. The charge exchange associated to these reactions also affected the size of the inner conductive zone, and leaded to a new steady-state resistance. These chemical, physical and geometrical effects can be used for gas detection, and constitutes the basis for developing novel room temperature conductometric gas sensors responsive to oxidizing species.

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Synthesis of Tin Oxide Nanostructures with Controlled Particle Size Using Mesoporous Frameworks

Cited by 24 publications

References 20 publications

Synthesis and characterization of NiO and nanoparticles obtained by a sucrose-based route

Synthesis and characterization of NiO and nanoparticles obtained by a sucrose-based route

Surface states in template synthesized tin oxide nanoparticles

Shrinkage Effects of the Conduction Zone in the Electrical Properties of Metal Oxide Nanocrystals: The Basis for Room Temperature Conductometric Gas Sensor

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