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Sb-doped tungsten oxides have been synthesized successfully by a hydrothermal method without any surfactant at 120 °C for 24 h. The structure and morphology of product were examined by XRD and SEM. The sensing tests reveal that the enhancement to NO2 response by Sb doping is very significant compared to that reported in literatures. Especially, the highest response of 3.5 wt%-Sb doped WO3 exhibits...
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