Metal semiconductor oxides (MOSs) derived from metal-organic frameworks (MOFs) possess unique internal structure that offer great potential for development in the sensing fields. In this study, we synthesized reduced graphene oxide (rGO) doped nanocubic CuO with Cu(Ⅱ)-BTC as a sacrificial template. The rGO/CuO-10 flexible sensor exhibits 30-fold improvement in response to 10 ppm H₂S at room temperature (RT) compared to pure CuO and theoretical detection limit down to 10 ppb. The sensor also maintains good stability when bent at different angles. The response enhancement can be owed to the composition of p-p heterostructure between rGO and CuO, the two-dimensional layered structure of rGO and the special morphology of CuO. Consequently, this study provides insights into preparation of flexible sensors based on MOFs-derived MOSs to detect H₂S at RT.

中文翻译：

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rGO 掺杂 MOF 衍生的 CuO 纳米复合材料作为柔性室温传感器，用于 ppb 级 H2S 检测


源自金属有机框架 （MOF） 的金属半导体氧化物 （MOS） 具有独特的内部结构，在传感领域具有巨大的发展潜力。在本研究中，我们以 Cu（II.）-BTC 为牺牲模板合成了还原氧化石墨烯 （rGO） 掺杂的纳米立方 CuO。与纯 CuO 相比，rGO/CuO-10 柔性传感器在室温 （RT） 下响应 10 ppm H₂S 的性能提高了 30 倍，理论检测限低至 10 ppb。传感器在不同角度弯曲时也能保持良好的稳定性。响应增强可归因于 rGO 和 CuO 之间 p-p 异质结构的组成、rGO 的二维层状结构和 CuO 的特殊形态。因此，本研究为制备基于 MOF 衍生的 MOSs 的柔性传感器以在 RT 下检测 H₂S 提供了见解。