DMMP gas sensor based on gold-modified ZnFe2O4 sensitive material and S-1 molecular sieve and preparation method of DMMP gas sensor

The invention discloses a DMMP gas sensor based on a gold-modified ZnFe2O4 sensitive material and an S-1 molecular sieve and a preparation method of the DMMP gas sensor, and belongs to the technical field of semiconductor oxide gas sensors. The sensor is composed of a commercially available Al2O3 substrate, a gold-modified ZnFe2O4 sensitive material and an S-1 molecular sieve, wherein the outer surface of the Al2O3 substrate is provided with two independent L-shaped gold electrodes, the gold-modified ZnFe2O4 sensitive material is coated on the outer surface of the Al2O3 substrate and the L-shaped gold electrodes, and the S-1 molecular sieve is spin-coated on the gold-modified ZnFe2O4 sensitive material. According to the invention, the gold-modified ZnFe2O4 sensitive material is prepared by a simple solvothermal method, so that a great leap of the gas-sensitive characteristic is realized; the sensor prepared by further spin-coating the sensitive material with the S-1 molecular sieve together shows excellent se