Anionic polyelectrolytes in titanosilicate molecular sieve synthesis towards simultaneously accomplishing low production cost and high catalytic activity

作者：Fu, Kairui; Wang, Jingui^*; Wang, Yichen; Shao, Yuanchao; Zhu, Jiaqi; Li, Tianduo^*

来源：RSC Advances, 2018, 8(38): 21363-21368.

DOI：10.1039/c8ra02621a

• TITANIUM SILICALITE-1 TS-1
• TETRAPROPYLAMMONIUM BROMIDE
• CYCLOHEXANONE AMMOXIMATION
• OXIDATIVE DESULFURIZATION
• EPOXIDATION
• ZEOLITE
• PROPYLENE
• SYSTEM
• H2O2
• PERFORMANCE

Assisted by an anionic polyelectrolyte of poly(acrylic acid) (PAA), high-performance titanium silicalite-1 (TS-1) could be facilely synthesized at very low usage of expensive organic templates (tetrapropylammonium hydroxide). The presence of PAA helped to incorporate more active Ti species into the TS-1 framework and change the morphology to a plate-like shape, which was beneficial to molecular diffusion among its micropores to access the Ti active sites. Therefore, TS-1 synthesized with PAA showed much higher catalytic activity than that synthesized using the traditional synthesis without polyelectrolytes, and only a 30% usage amount of organic template was used. Moreover, this ultra-cheap catalyst also displayed a better catalytic activity than commercial TS-1 synthesized via a series of complicated preparation processes including alkene epoxidation with hydrogen peroxide as a green oxidant.

• 出版日期2018
• 单位山东省科学院