title: Ionothermal synthesis process for aluminophosphate molecular sieves in the mixed water/ionic liquid system.
abstract: The synthesis process of aluminophosphate AlPO(4)-11 molecular sieve in the mixed water/1-butyl- 3-methylimidazolium bromide ([bmim]Br) ionic liquid was investigated by XRD, multinuclear solid-state NMR, scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy (EDS). It was observed that a tablet phase, named SIZ-2, was formed at the early stage of crystallization. During crystallization metastable SIZ-2 with an incompletely condensed framework phosphorus disappeared gradually, and the phosphorous species became fully condensed through hydroxyl reaction with tetrahedral aluminum to form thermodynamically stable AlPO(4)-11 in the final product. It was found that [bmim]Br, acting as the structure-directing agent, was occluded into the AlPO(4)-11 channel.
authors: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.
authors: Zhenchao
authors: Z
authors: Zhao
authors: Weiping
authors: W
authors: Zhang
authors: Renshun
authors: R
authors: Xu
authors: Xiuwen
authors: X
authors: Han
authors: Zhijian
authors: Z
authors: Tian
authors: Xinhe
authors: X
authors: Bao