The spherelike Cu₂O and the hybrids with reduced graphene oxide (rGO) have been synthesized successfully by a facile solution-based self-assembly method. The structure, morphology, composition, and specific surface area of composite were characterized by XRD, SEM, FTIR, XPS, and BET analysis, respectively. The gas-sensing properties to 1 ppm of NO₂ at room temperature were also examined. The results indicated that the 1 wt % rGO/Cu₂O composite not only exhibits 2.8 times higher response than that of pristine Cu₂O and excellent selectivity but also owns rapid response and recovery at room temperature, indicating the composite is a promising sensing material for room temperature detection of low-concentration NO₂. The enhanced sensing properties were discussed in detail, which can mainly be attributed to increased gas adsorption active sites and the fast carriers transport due to the incorporating of rGO.

中文翻译：

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Cu ₂ O和rGO杂化增强室温下低浓度NO _2的感测

通过一种简便的基于溶液的自组装方法成功地合成了球形Cu ₂ O和具有还原型氧化石墨烯（rGO）的杂化物。通过XRD，SEM，FTIR，XPS和BET分析分别表征了复合材料的结构，形态，组成和比表面积。还检查了室温下对1 ppm NO ₂的气敏特性。结果表明：1 wt％rGO / Cu ₂ O复合材料不仅具有比原始Cu ₂ O高2.8倍的响应速度和出色的选择性，而且在室温下具有快速的响应和恢复能力，表明该复合材料是一种很有前途的传感材料。用于低浓度NO _2的室温检测。详细讨论了增强的传感特性，这主要归因于由于引入了rGO而增加了气体吸附活性位点和快速的载流子传输。