Cerium-doped SnO2 nanomaterials with enhanced gas-sensitive properties for adsorption semiconductor sensors intended to detect low H2 concentrations

Highly sensitive to H(2)sensors were created on the base of material obtained through tin (II) oxalate oxidation by hydrogen peroxide water solution. It has been established that the addition of 0.1 wt% Ce to the sensor materials significantly increases response values of the sensors to hydrogen micro-concentrations in air (44 ppm H-2). Nanoscale nature of the obtained sensor materials was confirmed by transmission electron microscopy and X-ray diffraction analysis. The average particle size of the obtained 0.1 wt% Ce/SnO(2)sensor materials was found to be 10.6 nm. The sensors doped with 0.1 wt% Ce exhibit enhanced gas sensing properties: a wide concentration range of H(2)detection in air, relatively high selectivity to hydrogen and good repeatability of the response to H(2)during long-term sensor operation (2 months). Analysis of the previously reported data has revealed a promising combination of high sensitivity to hydrogen and fast response time with low Ce loading for sensors based on Ce/SnO(2)material obtained in this work.