Nano-crystalline, hierarchical zeolite Ti-Beta: Hydrothermal synthesis and catalytic performance in alkenes epoxidation reactions

Wang, Baorong; Peng, Xinxin; Yang, Jianming; Lin, Min; Zhu, Bin; Zhang, Yao; Xia, Changjiu; Liao, Weilin; Shu, Xingtian

doi:10.1016/j.micromeso.2018.11.019

Cited by 19 publications

(12 citation statements)

References 26 publications

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“…The group IV (e.g., Ti, Zr, and Hf) or V (e.g., V, Nb, and Ta) transition metal‐substituted zeolite catalysts exhibited good catalytic activity for the desired epoxidation from the alkene epoxidation due to the formation of stronger Lewis acid sites. [ 174 ] Among all of the metal transition metal‐substituted zeolite catalysts, the Ti‐substituted zeolite catalysts, such as Ti–MFI, [ 175 ] Ti–BEA, [ 176 ] and Ti–MWW, [ 177 ] exhibited the outstanding catalytic rate and selectivity of target epoxidation productions and were studied extensively in recent decades. The structure of Ti species and porosity of zeolite supports played an important role in the catalytical activity for alkene epoxidation.…”

Section: Oxidation Reactionsmentioning

confidence: 99%

Advances in Catalytic Applications of Zeolite‐Supported Metal Catalysts

2021

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Section: Oxidation Reactionsmentioning

confidence: 99%

Advances in Catalytic Applications of Zeolite‐Supported Metal Catalysts

2021

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“…Wang and his co-authors prepared platelike Ti-β nanocrystals in a basic gel system using sodium fluorine as a mineralization agent. 13 However, the crystallization takes 14 days, and the sodium cations have to be further removed by washing with HCl solution. Thus, it is still highly desirable to develop an alternative synthesis strategy for the preparation of hierarchical Ti-β nanocrystals within a shortened crystallization time, to improve the diffusion limitation and boost the catalytic activity of Ti-β zeolites for the oxidation reactions.…”

Section: Introductionmentioning

confidence: 99%

Seed-Assisted Synthesis of Hierarchically Structured Nano-Sized Ti-β Zeolites for the Efficient Epoxidation Reaction of Alkenes

et al. 2022

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The development of nano-sized titanosilicate zeolites with hierarchical structures is crucial in promoting the efficient epoxidation of alkenes. In the present work, nano-sized hierarchical Ti-β (*BEA) zeolites with high crystal yield are prepared by a one-pot nanoseed-assisted approach. The influence of seed size on the resultant Ti-β zeolites is investigated by complementary characterizations, including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), N2 adsorption/desorption, UV–vis diffuse reflectance spectroscopy (DRS), and UV Raman spectroscopy. The possible process for the formation of hierarchical Ti-β nanocrystals with the assistance of nanoseeds in the synthesis gel is proposed. Consequentially, the nano-sized hierarchical material prepared by the nanoseed-assisted method shows excellent mass transportation and accessibility to active sites by reducing particle size and constructing hierarchical porosity, hence showing a remarkably enhanced catalytic activity and selectivity in the epoxidation reaction of alkenes. This work will shed light on the efficient preparation of nano-sized titanosilicate zeolites.

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“…[ 19 ] Since the discovery of titanosilicate TS‐1 ( MFI ) in 1983, [ 20 ] some other titanosilicate zeolites such as Ti‐MWW ( MWW ), Ti‐Beta ( *BEA ), and Ti‐MOR ( MOR ) have been subsequently developed, which have brought great success in various synthetic processes of oxygenated chemicals with H 2 O 2 as the oxidant, such as alkene epoxidation, hydroxylation of phenol, ammoximation of ketone, oxidation of pyridine derivatives, and oxidative desulfurization (ODS, Figure ). [ 21–38 ]…”

Section: Introductionmentioning

confidence: 99%

Creation of Hierarchical Titanosilicate TS‐1 Zeolites

Bai

Song

Bai

et al. 2020

Adv Materials Inter

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Hierarchical TS‐1 zeolites that possess at least two levels of porosities have aroused growing interest in the past years. The enhanced mass transfer efficiency and increased accessibility of Ti active sites in the hierarchical TS‐1 zeolites greatly improve the catalytic performance by overcoming the steric and diffusional problems. In this review, recent important progress in the construction of hierarchical TS‐1 zeolites is presented, including mesoporogen, mesoporogen‐free, and demetallization strategies. Effective characterization methods for the Ti species and the hierarchical zeolite structures are described. The impacts of hierarchical structures on the creation of active Ti species and improvement of catalytic performances in the oxidative desulfurization and epoxidation reactions are highlighted. Finally, current challenges and future development perspectives for preparing hierarchical TS‐1 zeolite catalysts are addressed.

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Nano-crystalline, hierarchical zeolite Ti-Beta: Hydrothermal synthesis and catalytic performance in alkenes epoxidation reactions

Cited by 19 publications

References 26 publications

Advances in Catalytic Applications of Zeolite‐Supported Metal Catalysts

Advances in Catalytic Applications of Zeolite‐Supported Metal Catalysts

Seed-Assisted Synthesis of Hierarchically Structured Nano-Sized Ti-β Zeolites for the Efficient Epoxidation Reaction of Alkenes

Creation of Hierarchical Titanosilicate TS‐1 Zeolites

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