It is extremely necessary to detect Hydrogen sulfide (H₂S) due to the hazardous nature. Thus, it is required to design a material which can detect H₂S gas at low temperature. In this work, ZnCo₂O₄ microtubes are prepared by using absorbent cotton as template, combining immersion method in metal salt solution (Zn:Co=1:2) with calcination treatment in air. The influence of calcination temperature on the particle size and sensing property was also discussed. The diameter of particles on the ZnCo₂O₄ microtubes increases with increasing calcination temperature. The hollow microtubes of ZnCo₂O₄ materials calcined at 600 °C (ZCO-600) exhibit superb sensing performance to H₂S at 90 °C with the lowest detection limit of 50 ppb. The optimum operating temperature (90 °C) was lower than the other reported ZnCo₂O₄ sensors. ZCO-600 sensor also shows excellent selectivity, repeatability, stability, humidity resistance and the good linear relationship in ppb and ppm level H₂S. In addition, the feasible sensing mechanism of ZCO-600 to H₂S is explored on the basis of XPS analysis. Thus, ZnCo₂O₄ as a sensing material possesses widespread application prospects for the detection of trace H₂S gas.

由于硫化氢（H ₂ S）的危险性，检测是非常必要的。因此，需要设计一种能够在低温下检测H _{2 S气体的材料。}本工作以脱脂棉为模板，采用金属盐溶液（Zn:Co=1:2）浸渍法和空气中煅烧处理相结合，制备了ZnCo ₂ O _4微管。还讨论了煅烧温度对粒径和传感性能的影响。ZnCo ₂ O ₄微管上的颗粒直径随着煅烧温度的升高而增加。ZnCo ₂ O _{4中空微管}在 600 °C 下煅烧的材料 (ZCO-600) 在 90 °C 下对 H ₂ S 表现出极好的传感性能，最低检测限为 50 ppb。最佳工作温度 (90 °C) 低于其他报道的 ZnCo ₂ O ₄传感器。ZCO-600 传感器还表现出优异的选择性、重复性、稳定性、耐湿性以及在 ppb 和 ppm 级 H 2 S 的_良好线性关系。 XPS分析。因此，ZnCo ₂ O ₄作为传感材料在检测痕量H ₂ S 气体方面具有广泛的应用前景。