Kloprogge J Theo, Duong Loc V, Wood Barry J, Frost Ray L
Inorganic Materials Research Program, Queensland University of Technology, 2 George Street, GPO Box 2434, Brisbane, Qld 4001, Australia.
J Colloid Interface Sci. 2006 Apr 15;296(2):572-6. doi: 10.1016/j.jcis.2005.09.054. Epub 2005 Oct 17.
Synthetic corundum (Al2O3), gibbsite (Al(OH)3), bayerite (Al(OH)3), boehmite (AlO(OH)) and pseudoboehmite (AlO(OH)) have been studied by high resolution XPS. The chemical compositions based on the XPS survey scans were in good agreement with the expected composition. High resolution Al2p scans showed no significant changes in binding energy, with all values between 73.9 and 74.4 eV. Only bayerite showed two transitions, associated with the presence of amorphous material in the sample. More information about the chemical and crystallographic environment was obtained from the O1s high resolution spectra. Here a clear distinction could be made between oxygen in the crystal structure, hydroxyl groups and adsorbed water. Oxygen in the crystal structure was characterised by a binding energy of about 530.6 eV in all minerals. Hydroxyl groups, present either in the crystal structure or on the surface, exhibited binding energies around 531.9 eV, while water on the surface showed binding energies around 533.0 eV. A distinction could be made between boehmite and pseudoboehmite based on the slightly lower ratio of oxygen to hydroxyl groups and water in pseudoboehmite.
通过高分辨率X射线光电子能谱（XPS）对合成刚玉（Al2O3）、三水铝石（Al(OH)3）、拜耳石（Al(OH)3）、勃姆石（AlO(OH)）和拟薄水铝石（AlO(OH)）进行了研究。基于XPS全扫描的化学成分与预期成分吻合良好。高分辨率Al2p扫描显示结合能无显著变化，所有值均在73.9至74.4电子伏特之间。只有拜耳石显示出两个跃迁，这与样品中存在无定形物质有关。从O1s高分辨率光谱中获得了更多关于化学和晶体学环境的信息。在此，可以清楚地区分晶体结构中的氧、羟基和吸附水。所有矿物中晶体结构中的氧的特征结合能约为530.6电子伏特。存在于晶体结构或表面的羟基的结合能约为531.9电子伏特，而表面水的结合能约为533.0电子伏特。基于拟薄水铝石中氧与羟基和水的比例略低，可以区分勃姆石和拟薄水铝石。
