Effect of the Deposition Conditions on the Anion Resin Exchange Precipitation of Indium(III) Hydroxide.

A new patented method for the synthesis of nanosized powders of indium(III) hydroxide and oxide using the strong base anion exchange resin AV-17-8 as a precipitate agent was proposed. The effect of anions of the initial indium salt and the influence of the process duration, temperature, and counterions of resin such as hydroxide or carbonate on the yield of indium(III) hydroxide during the anion resin exchange precipitation were investigated by scanning electron microscopy, electrical conductivity measurement method, and atomic absorption analysis. Based on the obtained data, the mechanism of the anion resin exchange precipitation of indium(III) hydroxide was suggested. The products were characterized by X-ray diffraction, thermogravimetric analysis/differential scanning calorimetry, elemental analysis, Brunauer-Emmett-Teller, and transmission electron microscopy. It was found that impurity-free monophasic InO powders with an average particle size of 10-15 nm and specific surface area of 62-73 m/g were formed after heat treatment of as-prepared products at 400 °C.