The invention relates to a gas-sensor nanometer sensitive material,
slurry with the gas-sensor nanometer sensitive material, preparing of the gas-sensor nanometer sensitive material, preparing of the
slurry and an application of the gas-sensor nanometer sensitive material. A preparing method of the gas-sensor nanometer sensitive material includes the following steps that 1,
stannate is added into
ultrapure water and subjected to
ultrasonic dispersion, a
stannate solution is obtained, a
urea ethanol solution is added, ultrasonic
processing continues, an obtained
mixed solution is transferred into a
hydrothermal reaction kettle, after reaction is completed, cooling is carried out, and bottom precipitate is collected, centrifugally washed, arranged in a dryer and dried; 2, nanometer SnO2 hollow sphere
powder obtained after
drying is added into
distilled water to be subjected to
ultrasonic dispersion, a Pd(NO3)2 solution is dropwise added under the stirring condition,
ammonium hydroxide is added till the pH of the
mixed solution ranges from 9 to 12, the mixture is stirred at the indoor temperature, bottom precipitate is centrifugally collected, washed to be neutral and dried, and finally Pd-
doping nanometer SnO2 hollow spheres are obtained. The gas-sensor nanometer sensitive material, the
slurry, the preparing and the application have the advantages that the preparing methods are simple, the quantity of introduced foreign ions is small, the yield is high, volume production is facilitated, the specific area of the material is large,
dispersity is good, and high sensitivity and short response
recovery time are achieved.