high-performance hydrogen sulfide gas sensor based on pd/fe2o3–zr4mno10: working conditions optimization by response surface methodology

Sensitive materials in gas sensors sometimes need to be activated at a certain high temperature. high working temperature, however, is one of the main obstacles of fabricating gas sensor. in this paper, a hydrogen sulfide gas sensor based on cataluminescence at lower temperature than 150 °c was reported. the sensitive material, pd-doped fe2o3–zr4mno10, was synthesized via precipitation and impregnation. pd nanoparticles are uniformly distributed on the surface of fe2o3–zr4mno10 with a size of < 50 nm. the working conditions of cataluminescence of hydrogen sulfide on nano-pd/fe2o3–zr4mno10 optimized by response surface methodology were analytical wavelength of 467.4 nm, reaction temperature of 128.5 °c and carrier gas velocity of 132.8 ml/min. the sensitivity of the method can be increased by 4.5% under the optimized working conditions. the optimization method is universal for many multi-parameter processes. the results indicated that nano-pd/fe2o3–zr4mno10 could be a good candidate for fabricating hydrogen sulfide gas sensor.