摘要
将无定型磷酸铝在８００℃高温下与氨反应，制备了不同氮含量的固体碱催化剂氮化磷酸铝，并用化学分析、比表面测定（ＢＥＴ）、傅立叶红外光谱（ＦＴＩＲ）和光电子能谱（ＸＰＳ）等手段对产物进行了表征．结果表明，氮化产物保留了磷酸铝前体的高比表面，高温氮化过程中有Ｐ－ＮＨ２基团和Ｐ－ＮＨ－Ａｌ基团生成，且Ｐ－ＮＨ２基团较Ｐ－ＮＨ－Ａｌ基团易于生成，随着氮含量的增加，Ｐ－ＮＨ－Ａｌ基团所占比例增加，氮化过程有明显的磷的损失．化学分析表明，氮均匀地分布在样品的体相．
Solid basic catalysts aluminophosphate oxynitrides (AlPON) with variable nitrogen contents have been prepared by nitridation of high surface area amorphous AlPO 4 with NH 3 flows at 800 ℃ and characterized by chemical analysis,BET, FTIR and XPS technique. Starting from amorphous high surface area precursors, the AlPONs also present high surface area. It is found that P-NH 2 and P-NH-Al groups were form during high temperature treatment. P-NH 2 groups form easily than P-NH-Al groups and the ratio P-NH-Al/P-NH 2 increase with the increase of nitrogen content. During nitridation remarkable loss of phosphorus is also obversed.Chemical analysis suggests that nitrogen atoms are evenly distributed in the bulk of samples.
出处
《郑州工业大学学报》
1999年第2期15-17,共3页
Journal of Zhengzhou University of Technology
基金
河南省自然科学基金
关键词
固体碱催化剂
氮化磷酸铝
制备
结构特征
solid basic catalyst
aluminophosphate oxynitride
preparation
structure characters
