State Key Laboratory of Materials Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
Appl Spectrosc. 2013 Aug;67(8):930-9. doi: 10.1366/12-06761.
Palladium-doped nano-γ-Fe₂O₃ films were printed on Al₂O₃ substrates by screen printing-injecting hybrid technology. X-ray diffraction and scanning electron microscopy techniques were used to characterize the phase structures and morphologies of the films, respectively. The sensitivity of the films to 100 ppm formaldehyde in air was investigated. The surface adsorption and reaction process between Pd-doped nano-γ-Fe₂O₃ films and formaldehyde was studied by in situ diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS) at different temperatures. Dioxymethylene, formate ions, polyoxymethylene, and adsorbed formaldehyde were detected when the Pd-doped nano-γ-Fe₂O₃ films were exposed to 100 ppm formaldehyde at different temperatures. A possible mechanism of the reaction process is discussed.
钯掺杂纳米γ-Fe₂O₃薄膜通过丝网印刷-喷射混合技术打印在 Al₂O₃ 衬底上。分别采用 X 射线衍射和扫描电子显微镜技术对薄膜的相结构和形貌进行了表征。研究了薄膜对空气中 100ppm 甲醛的灵敏度。通过在不同温度下原位漫反射傅里叶变换红外光谱（DRIFTS）研究了钯掺杂纳米γ-Fe₂O₃薄膜与甲醛之间的表面吸附和反应过程。当钯掺杂纳米γ-Fe₂O₃薄膜在不同温度下暴露于 100ppm 甲醛时，检测到了二氧亚甲基、甲酸盐离子、聚甲醛和吸附甲醛。讨论了反应过程的可能机制。
