Simancas Raquel, Takemura Masamori, Yonezawa Yasuo, Sukenaga Sohei, Ando Mariko, Shibata Hiroyuki, Chokkalingam Anand, Iyoki Kenta, Okubo Tatsuya, Wakihara Toru
Institute of Engineering Innovation, The University of Tokyo, Tokyo 113-8656, Japan.
Department of Chemical System Engineering, The University of Tokyo, Tokyo 113-8656, Japan.
Nanomaterials (Basel). 2022 Jan 26;12(3):396. doi: 10.3390/nano12030396.
The effect of external hydrostatic pressure on the hydrothermal synthesis of the microporous silicoaluminophosphate SAPO-18 has been explored. The crystallization of the SAPO-18 phase is inhibited at 150 °C under high pressures (200 MPa) when using relatively diluted synthesis mixtures. On the contrary, the use of concentrated synthesis mixtures allowed SAPO-18 to be obtained in all the studied conditions. The obtained solids were characterized with XRD, SEM, ICP-AES, TG and Al and P MAS NMR spectroscopy. The results highlight the importance of the external pressure effect on the hydrothermal synthesis of molecular sieves and its influence on the interaction between the organic molecule and the silicoaluminophosphate network.
已探究了外部静水压力对微孔硅铝磷酸盐SAPO - 18水热合成的影响。当使用相对稀释的合成混合物时，在高压（200 MPa）下于150°C时，SAPO - 18相的结晶受到抑制。相反，使用浓缩合成混合物可在所有研究条件下获得SAPO - 18。所获得的固体通过XRD、SEM、ICP - AES、TG以及Al和P MAS NMR光谱进行了表征。结果突出了外部压力效应在分子筛水热合成中的重要性及其对有机分子与硅铝磷酸盐网络之间相互作用的影响。
