| abstract |
The invention belongs to the technical field of gas sensors, in particular to a preparation method of a ZnO/NiGa 2 O 4 @NF gas sensor for NO 2 detection. The preparation method comprises the following steps: firstly immersing the cleaned nickel foam in a mixed solution of Ni(NO 3 ) 2 ยท6H 2 O and Ga(NO 3 ) 3 , centrifugal washing and calcining after the reaction in the reactor to obtain NiGa 2 O 4 @NF, then NiGa 2 O 4 @NF was used as the matrix, carbon microspheres were used as the template, and zinc nitrate was used as the zinc source to support hollow zinc oxide to obtain ZnO/NiGa 2 O 4 @NF. Finally, the composite suspension was The gas sensor is prepared by spraying on the electrode. The gas sensitive sensor prepared by the invention has high sensitivity to NO 2 gas, fast response recovery rate and low gas detection temperature. |