Thermal studies of new precursors to indium–tin oxides for use as sensor materials in the detection of NOx

Non-aqueous synthesis of mesostructured tin dioxide

“…However, Hockensmith et al have recently theorized the presence of Sn(chel) 2 ?xH 2 O and (NH 4 ) 2 Sn(chel) 3 ?xH 2 O for aqueous reactions involving SnCl 4 with chelates such as 2,3-dihydroxynaphthalene, Tiron, and caffeic acid. 25 No crystal structures were obtained and the evidence for the tin coordination environment was limited to FTIR, TGA, and 1 H NMR data. In{Sn(chel) 3 }NO 3 was formed by the reaction of indium nitrate with the bis-chelate of 2,3-dihydroxynaphthalene, and films of ITO were formed on calcination at 900 uC.…”

“…This chemistry is not limited to glycol chelates, but rather can be applied to a wide range of glycols, diacids and diketones. Thus, many of the species identified by Hockensmith et al 25 can be synthesized by reacting the desired chelate with sodium stannate (or any other stannate salt) in a 3 : 1 ratio.…”

Various Structures Based on Nickel Oxide Thick Films as Gamma Radiation Sensors

“…Metal oxide sensors have been utilised for several decades for their low-cost and simplicity. However, issues with sensitivity, selectivity and stability have limited their use, often in favour of more expensive approaches [3,4]. The recent availability of various metal oxide materials in high-surface-area nanopowder form, as well as implementation of newly developed nanofabrication techniques, offer tremendous opportunities for sensor manufacturers.…”