Gas Sensitivity of ZnS Prepared by Solid State Reaction at Room Temperature

Nanometer ZnS powders were synthesized by the solid state reaction of ZnSO4·7H2O with Na2S·9H2O at room temperature. The gas sensitivity of ZnS obtained was discussed XRD and TEM show that the solid-state reaction at room temperature is feasible and reasonable and the mean grain size of ZnS crystalline is about 15nm. The translation temperature from ZnS to ZnO measured by TG-DTA is 610℃. The sensor based on ZnS obtained shows a good sensitivity and selectivity to H2S.