LaFeO₃ perovskite with a porous fibrous structure was successfully synthesized using a sunflower seed shell as a template. To investigate the effects of this template, a sample was prepared without a template via the same procedure. Through various characterization techniques, such as X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, N₂ adsorption-desorption analysis, X-ray photoelectron spectroscopy, oxygen temperature programed desorption, and hydrogen temperature programed reduction, the physiochemical properties of the samples were investigated. The results showed that the sample made with a template had a larger surface area and a larger amount of adsorbed oxygen, which further illustrated that the sunflower seed shell template had a significant impact on the physiochemical properties of the samples. Furthermore, we explored the catalytic activity for nitric oxide (NO) oxidation, and studied the factors affecting it, which highlighted its potential application in automobile exhausts.

以向日葵种子壳为模板，成功合成了具有多孔纤维结构的LaFeO ₃钙钛矿。为了研究该模板的效果，通过相同的步骤制备了没有模板的样品。通过各种表征技术，例如X射线衍射，扫描电子显微镜，傅立叶变换红外光谱，N ₂吸附-解吸分析，X射线光电子能谱，氧程序升温脱附和氢程序升温还原，研究了样品的理化性质。结果表明，用模板制备的样品具有较大的表面积和较大的吸附氧量，这进一步说明葵花籽壳模板对样品的理化性质有重要影响。此外，我们探索了一氧化氮（NO）氧化的催化活性，并研究了影响其的因素，从而突出了其在汽车尾气中的潜在应用。