@article{Zhang2023, 
author = {Peng Zhang and Xianfeng Yi and Changjiu Xia and Xinxin Peng and Shuai Zhang and Chengxiang Li and Anmin Zheng and Xiaoxin Zhang and Yibin Luo and Lifeng Cui and Fuhong Yu and Xingtian Shu},
title = {Rational construction of multiple hollow silicalite-1 zeolite with enhanced quasi acidity for robust vapor-phase Beckmann rearrangement},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {5},
pages = {7958-7966},
keywords = {hollow silicalite-1, H-bonded silanols, quasi acidity, vapor-phase Beckmann rearrangement},
url = {https://www.sciopen.com/article/10.1007/s12274-022-5305-3},
doi = {10.1007/s12274-022-5305-3},
abstract = {Developing efficient and stable zeolites for vapor-phase Beckmann rearrangement of cyclohexanone oxime is still a great challenge to realize ε-caprolactam (CPL) green production. In this work, the hierarchical porous silicalite-1 zeolites with multiple hollow structure (S-1-M) are explored by in-situ desilication−recrystallization post-treatment of spongy highway-like zeolites (S-1-S), which are synthesized through silanization synthesis of conventional bulky silicalite-1 (S-1). Compared to S-1, S-1-M achieves superior catalytic performance, with improving the CPL selectivity from 85.7% to 94.1% and prolonging the catalyst lifetime from 74 to 126 h at a weight hourly space velocity (WHSV) of 6 h−1. Comprehensive physiochemical studies demonstrate that the highly dispersed intracrystalline cavities within S-1-M endow greater mass diffusion and better quasi acidity inducing by the enhanced H-bonds among abundant H-bonded silanols, which is cooperatively responsible for its superior catalytic performance.}
}