硅醇
沸石
催化作用
ZSM-5型
材料科学
航程(航空)
化学工程
化学
纳米技术
有机化学
工程类
复合材料
作者
He Li,Jiayu Yu,Ke Du,W.S. Li,Ling Ding,Wei Chen,Songhai Xie,Yahong Zhang,Yi Tang
标识
DOI:10.1002/ange.202405092
摘要
Zeolite synthesis under acidic conditions has always presented a challenge. In this study, we successfully prepared series of ZSM‐5 zeolite nanosheets (Z‐5‐SCA‐X) over a broad pH range (4 to 13) without the need for additional supplements. This achievement was realized through aggregation crystallization of ZSM‐5 zeolite subcrystal (Z‐5‐SC) with highly short‐range ordering and ultrasmall size extracted from the synthetic system of ZSM‐5 zeolite. Furthermore, the crystallization behavior of Z‐5‐SC was investigated, revealing its non‐classical crystallization process under mildly alkaline and acidic conditions (pH < 10), and the combination of classical and non‐classical processes under strongly alkaline conditions (pH ≥ 10). What's particularly intriguing is that, the silanol nest content in the resultant Z‐5‐SCA‐X samples appears to be dependent on the pH values during the Z‐5‐SC crystallization process rather than its crystallinity. Finally, the results of the furfuryl alcohol etherification reaction demonstrate that reducing the concentration of silanol nests significantly enhances the catalytic performance of the Z‐5‐SCA‐X zeolite. The ability to synthesize zeolite in neutral and acidic environments without the additional mineralizing agents not only broadens the current view of traditional zeolite synthesis but also provides a new approach to control the silanol nest content of zeolite catalysts.
科研通智能强力驱动
Strongly Powered by AbleSci AI