两亲催化剂TS-1@Si/C催化α-蒎烯环氧化反应

全文下载： 202206002.pdf

文章编号： 1672-6987（2022）06-0011-10； DOI： 10.16351/j.1672-6987.2022.06.002

邢晨， 解从霞*(青岛科技大学 化学与分子工程学院，山东 青岛 266042）

摘要： 通过水热法制备出两亲介孔核壳材料TS-1@Si/C，采用SEM、TEM、XRD、氨气程序升温脱附等手段对其形貌和结构进行了表征。以TS-1@Si/C催化双氧水环氧化α-蒎烯合成2,3-环氧蒎烷。当n(Si)/n(Ti)为30，n(Si)/n(C)为14，催化剂的催化活性最高，反应工艺条件：α-蒎烯3 mmol，m(催化剂)/m(α-蒎烯)=71%，双氧水50 mmol，乙腈10 mL，水4 mL，碳酸钾2 mmol，50 ℃，4 h。α-蒎烯的转化率达到8141%，2,3-环氧蒎烷的选择性为8280%，催化剂可循环使用4次，催化活性有所下降。两亲性催化剂能形成水-油-固三相稳定界面，增大了反应底物在水相中的浓度，显著提高了催化α-蒎烯环氧化反应活性。

关键词： 水热合成； 两亲性材料； α-蒎烯； 环氧化； 水相反应

中图分类号： O 621; O 614.41文献标志码： A

引用格式： 邢晨，解从霞. 两亲催化剂TS-1@Si/C催化α-蒎烯环氧化反应［J］. 青岛科技大学学报(自然科学版), 2022, 43(6): 11-20.

XING Chen，XIE Congxia. Epoxidation of α-pinene catalyzed by amphiphilic catalyst TS-1@Si/C［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2022, 43(6): 11-20.

Epoxidation of α-Pinene Catalyzed by Amphiphilic Catalyst TS-1@Si/C

XING Chen， XIE Congxia

(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

Abstract: Amphiphilic mesoporous core-shell material TS-1@Si/C was prepared by hydrothermal method, and the morphology and structure of TS-1@Si/C were characterized by SEM, TEM, XRD and ammonia temperature programmed desorption. By using TS-1@Si/C as catalyst, 2,3-epoxypinane was synthesized from α-pinene with hydrogen peroxide as oxidant. When the n(Si)/n(Ti) molar ratio is 30 and the n(Si)/n(C) molar ratio is 14, the catalyst has the highest activity. The reaction conditions are as follows: α-pinene 3 mmol, catalyst (71% of the mass ratio of α-pinene), hydrogen peroxide 50 mmol, acetonitrile 10 mL, water 4 mL, potassium carbonate 2 mmol, 50 ℃, and 4 h. The conversion of α-pinene was 8141%, and the selectivity of 2,3-epoxypinane was 8280%. The catalyst could be reused for 4 times, and the catalytic activity decreased. Amphiphilic catalyst can form stable water-oil-solid interface, increase the concentration of reaction substrate in the aqueous phase, and significantly improve the catalytic performance of epoxidation of α-pinene.

Key words: hydrothermal synthesis; amphiphilic material; α-pinene; epoxidation; aqueous phase reaction

收稿日期： 2021-12-29

基金项目： 国家自然科学基金项目(32071710).

作者简介： 邢晨（1993—), 女, 硕士研究生.*通信联系人.