Hydrothermal synthesis of fine oxide powders

Sōmiya, Shigeyuki; Roy, Rustum

doi:10.1007/bf02903883

Cited by 177 publications

(79 citation statements)

References 16 publications

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“…Other studies were done in order to control the growth of the particles. In order to prevent grain growth of the nanoparticles, Somiya et al [32] prepared nanomaterials by hydrothermal microemulsion process. They conclude that the aqueous micelles in microemulsions act as microreactors to confine the growth of TiO 2 powders.…”

Section: -Introductionmentioning

confidence: 99%

Pigments based on Cr and Sb doped TiO 2 prepared by microemulsion-mediated solvothermal synthesis for inkjet printing on ceramics

et al. 2015

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Nanoparticles of the ceramic pigment with composition Ti 0.97 Cr 0.015 Sb 0.015 O 2 were prepared by microemulsion-mediated solvothermal method at 180 ºC. Anatase or rutile single phase was obtained depending on the synthesis conditions. Scanning electron microscope analysis showed the formation of nanospheres with particle size around 600 nm. The anatase to rutile transformation temperature was determined by Raman spectroscopy. The evolution of the colour was studied, and it was related with the polymorphic transition. Yellow nanopigments were obtained at low temperature and huge orange colour was observed at high temperature. Nanopigments prepared at 180 ºC were tested with an industrial frit. Similar chromatic coordinates of an industrial orange ceramic pigment obtained at high temperatures were observed. -potential values of the nanoparticles were  -57 mV. The size, shape, colour and electrostatic stability of these nanoparticles make them potential candidates to be applied in glazes or inkjet printers as orange ceramic pigments.

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Section: -Introductionmentioning

confidence: 99%

Pigments based on Cr and Sb doped TiO 2 prepared by microemulsion-mediated solvothermal synthesis for inkjet printing on ceramics

et al. 2015

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“…Thus, hydrothermal can be used in various processes i.e. crystallization (Matthews, 1976), crystal growth (Laudise & Nielsen, 1961), synthesis (Sōmiya & Roy, 2000), decomposition (Jomaa et al, 2003), extraction (Goguel, 1985), etc. Lots of researches in this field have been dedicated to "Hydrothermal synthesis" which usually involves aqueous chemical reactions at temperatures higher than 100ºC in a closed system.…”

Section: Hydrothermal Synthesismentioning

confidence: 99%

Application of Artificial Neural Networks in Optical Properties of Nanosemiconductors

Tabriz¹,

Salehpour²,

Kandjani³

2011

Artificial Neural Networks - Application

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“…For example if Na2WO4 is acidified with HCl and is heated in an aqueous environment at 150°C, both a one dimension and three dimension tunnel structure are formed depending on the initial pH of the reaction medium (Whittingham, 1994). Beside that the technique was also used for preparing fine oxide powders (Somiya et al, 2000).…”

Section: Hydrothermal Methodsmentioning

confidence: 99%

Soft Chemistry Routes to New Nanosize Materials

Melghit

2007

SQU Journal for Science

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The old classical method for preparing inorganic materials is by the ceramic route or solid state reaction. It consists of mixing the starting materials at an elevated temperature. This method has been used for preparing numerous new materials until today. Three decades ago, the materials science community was aware of soft chemistry synthesis or chimie douce, especially with the emergence of nanotechnology field. Instead of the classical method, which involves high temperature, soft chemistry techniques use lower temperatures. In general, starting materials are dissolved in a liquid phase and different parameters such as pH, temperature and reaction time are adjusted in order to obtain the desired product. By using a lower temperature of preparation, the product obtained shows nanosize particles, with sizes lower than 100 nanometers. In contrast, the ceramic route (or solid state reaction) using higher temperatures leads to bigger particles size that are out of the nanosize range. Also, some interesting phases that are not stable at elevated temperatures (named metastable phases) and are not accessible by the classical method, are now prepared by the soft chemistry technique. Usually these metastable phases have interesting structural features and important physical properties. Adding to that, the product is obtained with a higher level of purity.

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Hydrothermal synthesis of fine oxide powders

Cited by 177 publications

References 16 publications

Pigments based on Cr and Sb doped TiO 2 prepared by microemulsion-mediated solvothermal synthesis for inkjet printing on ceramics

Pigments based on Cr and Sb doped TiO 2 prepared by microemulsion-mediated solvothermal synthesis for inkjet printing on ceramics

Application of Artificial Neural Networks in Optical Properties of Nanosemiconductors

Soft Chemistry Routes to New Nanosize Materials

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