Lin Jian-Wei, Wang Yu-Xuan, Xu Hao, Huo Li-Zhu, Yang Xue-Juan, Luo Xi-Ping
Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A & F University, Hangzhou 311300, People's Republic of China.
R Soc Open Sci. 2024 Jul 3;11(7):231216. doi: 10.1098/rsos.231216. eCollection 2024 Jul.
Anatase TiO has evolved into one of the most attractive materials for gas sensing owing to its strong oxidation activity and excellent sensing properties. In this study, we prepared Pt and bamboo charcoal co-modified nano-TiO using a one-pot hydrothermal process and applied it to detect formaldehyde. The successful incorporation of the precious metal Pt and bamboo charcoal onto TiO was confirmed by scanning electron microscope, transmission electron microscopy, energy dispersive spectrometer, X-ray diffraction and X-ray photoelectron spectroscopy. Detailed analysis revealed a homogeneous distribution of Pt nanoparticles and bamboo charcoal on the TiO surface, which significantly improved the surface area and facilitated gas adsorption. These modifiers significantly enhanced the response of TiO to formaldehyde, for instance, the response signal increased fourfold, while the response time decreased from 91 to 68 s. The sample with 0.5@Pt and 0.5@C bamboo charcoal performed the best, showcasing the synergistic effect of metal nanoparticles and carbonaceous materials on gas-sensing properties. Our work highlighted the potential of using biomass-derived carbon to enhance the detection of formaldehyde and demonstrated the importance of material characteristics in designing effective gas sensors.
锐钛矿型二氧化钛因其强大的氧化活性和优异的传感性能，已发展成为气体传感领域最具吸引力的材料之一。在本研究中，我们采用一锅水热法制备了铂和竹炭共改性的纳米二氧化钛，并将其应用于甲醛检测。通过扫描电子显微镜、透射电子显微镜、能量色散光谱仪、X射线衍射仪和X射线光电子能谱证实了贵金属铂和竹炭成功掺入二氧化钛中。详细分析表明，铂纳米颗粒和竹炭均匀分布在二氧化钛表面，显著提高了表面积并促进了气体吸附。这些改性剂显著增强了二氧化钛对甲醛的响应，例如，响应信号增加了四倍，而响应时间从91秒降至68秒。含0.5%铂和0.5%竹炭的样品表现最佳，展示了金属纳米颗粒和碳质材料在气敏性能方面的协同效应。我们的工作突出了利用生物质衍生碳增强甲醛检测的潜力，并证明了材料特性在设计有效气体传感器中的重要性。
