Composite n–p semiconducting titanium oxides as gas sensors

Solar photocatalytic degradation of methyl orange dye using TiO2nanoparticles synthesised by sol–gel method in neutral medium

“…Methyl orange (MO) is a commonly used mono azo dyes in laboratory assays, textiles and other commercial products, and have to be removed from water due to its toxicity. [1] Titanium dioxide (TiO 2 ) nanomaterials are used in a wide range of applications such as (photo) catalysis, [2,3] sensor devices, [4,5] dye-sensitised solar cells, [6] etc. At present, among the semiconductor catalysts used in heterogeneous photocatalysis reactions, TiO 2 is the most practical because of its nontoxicity, high catalytic activity, strong oxidising capability and good stability.…”

Thermoelectric Properties of Non-Stoichiometric Titanium Dioxide TiO<SUB>2&minus;<I>x</I></SUB> Fabricated by Reduction Treatment Using Carbon Powder

“…In recent years, titanium dioxide has been the most investigated metal oxide with regard to its applications as a photocatalyst, [1][2][3][4] thermoelectric material, 5) gas sensing material [6][7][8] and other functional materials. [9][10][11] To increase its electrical conductivity, 5,[11][12][13][14][15] catalytic activity 16,17) and sensing behaviour, [18][19][20] it is necessary to increase the oxygen vacancy in the crystal and obtain a non-stoichiometric titanium dioxide, TiO 2Àx .…”

Oxidation chemistry and electrical activity of Pt on titania: development of a novel zeolite-filter hydrocarbon sensor

“…Our group and collaborators have previously described the physical setup used to measure electrical resistance, so only a brief summary will be presented here [5,6,11]. All measurements were performed at 600 • C in a background of 5% O 2 /N 2 .…”

“…Our research group has examined titania-based sensors to detect gases at temperatures over 500 • C by correlating changes in resistance of titania to the interactions of the gas with the metal oxide [5,6]. It was shown that both CO and hydrocarbons cause changes in the sensor response due to oxidation on the oxide surface.…”