SnO₂, SnO₂-PdPt, and PdPt decorated SnO₂-rGO (SnO₂-rGO-PdPt) samples were presented to use in resistive sensing of methane. A hydrothermal method was used to synthesize SnO₂ and SnO₂-rGO and these were then easily doped with PdPt catalyst by in situ reductions of their metallic salts. The responses to gaseous methane at levels between 500 and 10,000 ppm were measured in the temperature range of 50–250 °C. Results demonstrated that the dopants can increase the response of SnO₂ sensor toward 1000 ppm methane from 12.5% (for bare SnO₂) to 32.7% (for SnO₂-PdPt) and 69.5% (for SnO₂-rGO-PdPt) at 150 °C. In addition, the optimum operating temperature was reduced from 300 °C (for SnO₂) to 150 °C (for SnO₂-rGO-PdPt). The catalyst also improved the stability during continuous cycles. The response and recovery times of SnO₂-rGO-PdPt sensor at 150 °C and flow rate of 160 sccm of 1000 ppm methane, were 50 s and 4.5 min respectively. A sensing mechanism is suggested in details.

提出了SnO ₂，SnO ₂ -PdPt和装饰有PdPt的SnO ₂ -rGO（SnO ₂ -rGO-PdPt）样品，用于甲烷的电阻传感。使用水热法合成SnO ₂和SnO ₂ -rGO，然后通过原位还原它们的金属盐将其容易地掺入PdPt催化剂。在50–250°C的温度范围内测量了对500至10,000 ppm之间的气态甲烷的响应。结果表明，掺杂剂可以使SnO ₂传感器对1000 ppm甲烷的响应从12.5％（对于裸SnO ₂）增加到32.7％（对于SnO ₂ -PdPt）和69.5％（对于SnO _2）。-rGO-PdPt）在150°C下。此外，最佳工作温度从300°C（对于SnO ₂）降低到150°C（对于SnO ₂ -rGO-PdPt）。该催化剂还改善了连续循环期间的稳定性。SnO ₂ -rGO-PdPt传感器在150°C和160 sccm的1000 ppm甲烷流量下的响应和恢复时间分别为50 s和4.5 min。详细提出了一种传感机制。