十二烷基磺酸根插层Ni^(2+)-Fe^(3+)/Co^(2+)-Ni^(2+)-Fe^(3+) LDHs及其结构研究

Preparation and structure of dodecyl sulfonate-pillared Ni^(2+)-Fe^(3+)/Co^(2+)-Ni^(2+)-Fe^(3+) LDHs

应用水热技术制备了二元Ni2+-Fe3+-CO23- LDHs和三元Co2+-Ni2+-Fe3+-CO32- LDHs,以十二烷基磺酸根离子作为插层客体,通过离子交换反应在酸性溶液中实现了十二烷基磺酸根插层Ni2+-Fe3+ LDHs和Co2+-Ni2+-Fe3+-LDHs。十二烷基磺酸根在Ni2+-Fe3+LDHs层间出现了2种空间导向和排列:即十二烷基磺酸根以单层垂直方向排布和以双层垂直方向排布在层间;十二烷基磺酸根在三元组分Co2+-Ni2+-Fe3+-LDHs层间只有一种空间排列方式,即十二烷基磺酸根以单层垂直方向排布于Co2+-Ni2+-Fe3+-LDHs层间。

Co2＋-Ni2＋-Fe3＋-CO2-3 LDHs and Ni2＋-Fe3＋LDHs materials were hydrothermally synthesized by using complexing-agent-assisted homogeneous precipitation technology.Dodecyl sulfonate-pillared Ni2＋-Fe3＋/Co2＋-Ni2＋-Fe3＋-CO2-3LDHs materials were obtained by anionic exchange action.The results showed that the original interlayer carbonate ions of the hytrotalcite precursor could be completely replaced by dodecyl sulfonate under controlled conditions.The dodecyl sulfonic acid is to the vertical arrangement of single and double tilt to the direction of arrangement of Ni2＋-Fe3＋ LDHs,but dodecyl sulfonic acid in the ternary composition Co2＋-Ni2＋-Fe3＋ LDHs interlayer space is only one kind of arrangement.