Co3O4空心球在室温下的甲醛传感
Formaldehyde sensing by Co3O4 hollow spheres at room temperature
AI总结：
本研究基于Co3O4空心球结构实现室温甲醛检测，不同形貌修饰显著影响响应性能，并展现出对NH3、CO等气体的选择性，具有快速传感潜力。
摘要：
甲醛是一种无处不在且高毒性的气体。由于其毒性和扩散性，对其进行高效检测是一项基本任务。在本工作中，我们研究了基于空心Co3O4纳米结构对痕量甲醛的检测。研究发现，不同结构的Co3O4空心球在室温下对甲醛表现出不同的传感性能，纳米片修饰的Co3O4对100 ppm甲醛的响应值在18秒内将达到35，而纳米颗粒修饰的Co3O4空心球在18秒内将达到2.1，在300秒内达到17。在室温下，纳米片修饰和纳米颗粒修饰的Co3O4空心球对100 ppm甲醛在10秒内的响应值分别达到4和20。在室温下，传感器对NH3、CO等气体不响应。基于理论和实验结果提出了传感机理。Co3O4传感器显示出在室温下快速检测CH2O的潜在应用价值。
英文摘要：
Formaldehyde is a ubiquitous and high toxicity gas. It is an essential task to efficient detect owing to their toxicity and diffusion. In this work, we studied on the detection of trace amount of formaldehyde based on hollow Co3O4 nanostructure. It is found that Co3O4 hollow spheres with different structures shows distinct sensing performance towards formaldehyde at room temperature, the response value of nanosheet modified Co3O4 towards 100 ppm formaldehyde will reach 35 in 18 second, and the nanoparticle modified Co3O4 hollow sphere will reach 2.1 in 18 second, 17 in 300 second. The nanosheet modified and nanoparticle modified Co3O4 hollow sphere will reach 4 and 20 in 10 second towards 100 ppm formaldehyde at room temperature. As room temperature, the sensors do not response towards NH3, CO, etc. The sensing mechanism was proposed based on the theoretical and experimental results. The Co3O4 sensor shows that potential utility in CH2O quick sensing at room temperature.
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