Kang Liping, Zhang Menming, Liu Zong-Huai, Ooi Kenta
Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2007 Jul;67(3-4):864-9. doi: 10.1016/j.saa.2006.09.001. Epub 2006 Sep 10.
Four kinds of manganese oxides with either layered or tunnel structures were prepared by different methods. The structural features of the prepared materials were characterized by power X-ray diffraction, IR spectra and SEM observation. A compare analysis of IR spectra for these materials before and after the acid treatment was carried out. Band around 761 cm(-1) could be assigned to a characteristic adsorbent band of tunnel-type manganese oxides; while it was not observed in layer-type manganese oxides. After the acid treatment, the position and relative intensity of the bands in 300-1200 cm(-1) region showed an obvious change for layered manganese oxides in compare with tunnel-type manganese oxides. The variation of IR spectra could be used to distinguish layered manganese oxides from tunnel manganese oxides.
通过不同方法制备了四种具有层状或隧道结构的氧化锰。采用粉末X射线衍射、红外光谱和扫描电子显微镜观察对所制备材料的结构特征进行了表征。对这些材料酸处理前后的红外光谱进行了对比分析。761 cm(-1)附近的谱带可归属于隧道型氧化锰的特征吸附带；而在层状氧化锰中未观察到该谱带。酸处理后，与隧道型氧化锰相比，层状氧化锰在300 - 1200 cm(-1)区域的谱带位置和相对强度发生了明显变化。红外光谱的变化可用于区分层状氧化锰和隧道型氧化锰。
