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首页> 美国卫生研究院文献>Scientific Reports >TiO2 nanoparticles functionalized by Pd nanoparticles for gas-sensing application with enhanced butane response performances
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TiO2 nanoparticles functionalized by Pd nanoparticles for gas-sensing application with enhanced butane response performances

机译：由Pd纳米颗粒官能化的TiO2纳米颗粒用于气敏应用具有增强的丁烷响应性能

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摘要

Pd functionalized TiO2 nanoparticles were synthesized by a facile hydrothermal method. The structure, morphology, surface chemical states and surface area were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and N2 adsorption-desorption isotherms, respectively. The as-synthesized pure and Pd functionalized TiO2 nanoparticles were used to fabricate indirect-heating gas sensor, and the gas-sensing characteristics towards butane were investigated. At the optimum temperature, the sensors possess good response, selectivity, response/recovery, repeatability as well as long-term stability. Especially for the high response, the response of 7.5 mol% Pd functionalized TiO2 nanoparticles based sensor reaches 33.93 towards 3000 ppm butane, which is about 9 times higher than that of pure TiO2 nanoparticles. The response and recovery time are 13 and 8 s, respectively. Those values demonstrate the potential of using as-synthesized Pd functionalized TiO2 nanoparticles as butane gas detection, particularly in the dynamic monitoring. Apart from these, a possible mechanism related to the enhanced sensing performance is also investigated.
机译：通过简便的水热法合成了Pd官能化的TiO2纳米粒子。分别通过X射线衍射（XRD），透射电子显微镜（TEM），X射线光电子能谱（XPS）和N 2吸附-脱附等温线对结构，形态，表面化学状态和表面积进行了表征。用合成的纯Pd和Pd官能化的TiO2纳米粒子制备间接加热的气体传感器，并研究了其对丁烷的气敏特性。在最佳温度下，传感器具有良好的响应性，选择性，响应/恢复性，可重复性以及长期稳定性。尤其是对于高响应性，基于7.5？mol％Pd官能化TiO2纳米颗粒的传感器对3000 ppm丁烷的响应达到33.93，约为纯TiO2纳米颗粒的9倍。响应时间和恢复时间分别为13和8μs。这些值证明了使用合成后的Pd官能化TiO2纳米颗粒作为丁烷气体检测的潜力，特别是在动态监测中。除此之外，还研究了与增强的感测性能有关的可能机制。

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