期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 335, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.micromeso.2022.111840
关键词
Hydroxylation; Aromatics; TS-1 zeolites; Ti-Lewis acid sites; para-hydroxyanisole
类别
资金
- National Natural Science Foundation of China [21872170, 21733013, U1932218, 22061130202]
- Hubei Provincial Natural Science Foundation of China [2020CFB552, 2021CFA021]
- Hebei Lansheng Bio-Tech Co., Ltd. of China
In this study, TS-1 zeolites were prepared using different synthetic methods, and it was found that the synthetic approach can control the crystallinity and distribution of Ti-Lewis acid sites in TS-1 zeolite. The structure-activity relationship of TS-1 zeolite was established, revealing that the concentration of Ti-Lewis acid sites determines the conversion rate of the reaction, while both the crystallinity and distribution of Ti-Lewis acid sites significantly influence the selectivity to the target product.
One-step direct hydroxylation of aromatics is an atom-economic way for phenols production. Ti-containing MFI zeolite is considered to be one of the most potential catalysts for hydroxylation of aromatics to phenols under mild condition with aqueous H2O2 as the oxidant. However, the products are often a mixture of mono-or multi phenols. Designing TS-1 zeolite catalyst with high yield and selectivity to the target phenols remains a challenging task. Here TS-1 zeolites are prepared by direct hydrothermal and post-synthetic methods. Multiple spectroscopic characterizations show that the crystallinity and Ti-Lewis acid sites (Ti-LASs) distribution of TS-1 zeolite can be controlled by the synthetic approach. The structure-activity relationship of TS-1 zeolite is established in the catalytic hydroxylation of anisole, revealing that Ti-LASs concentration determines the conversion of anisole, while both the crystallinity and Ti-LASs distribution significantly influence the selectivity to the desired product para-hydroxyanisole.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据