PDF(Pubmed)
Abstract：
A rapid and accurate monitoring of hazardous formaldehyde (HCHO) gas is extremely essential for health protection. However, the high-power consumption and humidity interference still hinder the application of HCHO gas sensors. Hence, zeolitic imidazolate framework-8 (ZIF-8)-loaded Pt-NiO/In2O3 hollow nanofibers (ZPNiIn HNFs) were designed via the electrospinning technique followed by hydrothermal treatment, aiming to enable a synergistic advantage of the surface modification and the construction of a p-n heterostructure to improve the sensing performance of the HCHO gas sensor. The ZPNiIn HNF sensor has a response value of 52.8 to 100 ppm HCHO, a nearly 4-fold enhancement over a pristine In2O3 sensor, at a moderately low temperature of 180 °C, along with rapid response/recovery speed (8/17 s) and excellent humidity tolerance. These enhanced sensing properties can be attributed to the Pt catalysts boosting the catalytic activity, the p-n heterojunctions facilitating the chemical reaction, and the appropriate ZIF-8 loading providing a hydrophobic surface. Our research presents an effective sensing material design strategy for inspiring the development of cost-effective sensors for the accurate detection of indoor HCHO hazardous gas.
摘要：
快速准确地监测有害甲醛(HCHO)气体对于健康保护至关重要。然而,高功耗和湿度干扰仍然阻碍了HCHO气体传感器的应用。因此，通过静电纺丝技术，然后进行水热处理，设计了负载沸石咪唑酯骨架8（ZIF-8）的Pt-NiO/In2O3中空纳米纤维（ZPNiInHNFs），旨在实现表面改性和p-n异质结构构造的协同优势，以改善HCHO气体传感器的传感性能。ZPNiInHNF传感器的响应值为52.8至100ppmHCHO，比原始In2O3传感器增强了近4倍，在180°C的适度低温下，随着快速的响应/恢复速度（8/17s）和优良的耐湿性。这些增强的传感特性可以归因于Pt催化剂提高了催化活性，p-n异质结促进化学反应，和适当的ZIF-8负载提供疏水表面。我们的研究提出了一种有效的传感材料设计策略，以激发开发具有成本效益的传感器，以准确检测室内HCHO有害气体。
