Nobel metal functionalized chemiresistive type metal-oxide sensors were fabricated and tested against hazardous gases such as acetone, ethanol, hydrogen sulfide, hydrogen cyanide and dimethyl methylphosphonate. WO\(_3\) nanoflakes (NFs) were fabricated on Al\(_2\)O\(_3\) substrates by a facile hydrothermal route. 2D nanoflakes randomly aligned and uniformly covered on the substrate surface, and the thickness of the NFs were found approximately 100 nm. Then, Pt was loaded on WO\(_3\) nanoflakes by RF sputtering method. According to the sensor tests, Pt modification tremendously improved the sensor performance of nanoflakes against acetone gas in terms of sensor response, selectivity among the measured gases and operation temperature. The spillover effect of Pt increased the sensing response and the sensor was able to selectively detect acetone with 237 particle per billion (ppb) at operation temperature of 250 \(^{\circ }\)C. Pt functionalization suppresses the sensor responses of NFs against gases (ethanol, hydrogen sulfide, hydrogen cyanide and dimethyl methylphosphonate) other than acetone. While pristine NFs sensor was able to sense these gases at low temperatures, Pt-functionalized WO\(_3\) NFs did not sense at temperatures lower than 200 \(^{\circ }\)C by giving rise to the selectivity of the sensor against acetone.

制造了诺贝尔金属功能化化学电阻型金属氧化物传感器，并针对丙酮、乙醇、硫化氢、氰化氢和甲基膦酸二甲酯等有害气体进行了测试。WO \(_3\)纳米薄片 (NFs)通过简便的水热路线在 Al \(_2\) O \(_3\)衬底上制造。二维纳米薄片随机排列并均匀覆盖在基板表面，NFs 的厚度约为 100 nm。然后，将 Pt 加载到 WO \(_3\)通过射频溅射法制备纳米薄片。根据传感器测试，在传感器响应、被测气体之间的选择性和操作温度方面，Pt 改性极大地提高了纳米薄片对丙酮气体的传感器性能。Pt 的溢出效应增加了传感响应，并且传感器能够在 250 \(^{\circ }\) C 的操作温度下选择性地检测到 237 个粒子每十亿 (ppb) 的丙酮。 Pt 功能化抑制了 NFs 的传感器响应除丙酮以外的气体（乙醇、硫化氢、氰化氢和甲基膦酸二甲酯）。虽然原始 NFs 传感器能够在低温下感应这些气体，但 Pt 功能化的 WO \(_3\) NFs 在低于 200 的温度下无法感应\(^{\circ }\) C 通过提高传感器对丙酮的选择性。