4.7 Article

Preparation and catalytic performance of the supported Ti-MWW zeolites

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Chemistry, Physical

Catalytic oxidation performance and ion-exchange of Ti-MWW zeolite membrane with dual organic template agents and potassium carbonate

Yuan Liang et al.

Summary: In this study, tubular Ti-MWW zeolite membranes were prepared without boric acid using dual organic template agents and potassium carbonate through secondary hydrothermal synthesis. The stability of the 12MR cage and 10 MR of the MWW zeolite topology structure was achieved by TMAdaOH and HMI organic template agents, and K+ cations played a critical role as a mineralization agent in preparing the Ti-MWW zeolite membrane with a bi-layer Ti-MWW zeolites layer. Furthermore, ion-exchange significantly improved the catalytic performance of the Ti-MWW zeolite membrane for phenol hydroxylation with H2O2, and the effects of ammonium salt, ion-exchange time, and temperature on the microstructure and catalytic performance were investigated.

JOURNAL OF CATALYSIS (2023)

Review Chemistry, Inorganic & Nuclear

A review on titanosilicate-1 (TS-1) catalysts: Research progress of regulating titanium species

Baohe Wang et al.

Summary: Titanosilicate-1 (TS-1) has garnered extensive attention for its unique shape-selective catalytic oxidation performance and excellent hydrothermal stability. However, diffusion and acid site restrictions hinder its industrial application. This paper comprehensively discusses the optimization of synthesis conditions to improve the content of framework Ti species and inhibit the formation of non-framework Ti species. It also summarizes methods for regulating the distribution, electronic environment, and coordination states of Ti species, as well as compares and analyzes specific methods for eliminating non-framework Ti species.

COORDINATION CHEMISTRY REVIEWS (2023)

Review Chemistry, Multidisciplinary

Zeolites in Adsorption Processes: State of the Art and Future Prospects

Eduardo Perez-Botella et al.

Summary: This review highlights the importance and relevance of zeolites in adsorption technology, covering their structure, composition, preparation, properties, as well as the fundamentals of adsorption science and their applications in chemical and energy production separations.

CHEMICAL REVIEWS (2022)

Review Chemistry, Multidisciplinary

Zeolite nanosheets for catalysis

Xiangyu Wang et al.

Summary: Zeolites with well-defined micropores are widely used as heterogeneous catalysts, but their catalytic performances are often limited by diffusion constraints. Synthesizing zeolite nanosheets is an efficient method to shorten the diffusion pathway and eliminate the constraints. This tutorial review discusses the recent progresses in the synthesis of zeolite nanosheets and their catalysis, providing significant insights for designing and preparing highly efficient zeolite catalysts.

CHEMICAL SOCIETY REVIEWS (2022)

Article Multidisciplinary Sciences

Controlled direct synthesis of single- to multiple-layer MWW zeolite

Jie-Qiong Chen et al.

Summary: This research demonstrates the direct synthesis of single-layer MWW zeolite with high crystallinity and excellent stability, with a formation mechanism involving balanced rates between nucleation/growth of MWW nanocrystals and incorporation of organosilane into the MWW unit cell. By simply adjusting synthesis conditions, MWW nanosheets with tunable thickness can be obtained.

NATIONAL SCIENCE REVIEW (2021)

Review Chemistry, Physical

MWW and MFI Frameworks as Model Layered Zeolites: Structures, Transformations, Properties, and Activity

Mariya Shamzhy et al.

Summary: This article discusses the importance of porous solids with large surface areas and void spaces in catalysis, separation, and molecule storage, with a focus on the synthesis and application of layered zeolites.

ACS CATALYSIS (2021)

Review Chemistry, Multidisciplinary

Separation and Purification of Hydrocarbons with Porous Materials

Yaqi Wu et al.

Summary: This Minireview focuses on the developments of the adsorptive separation of methane/nitrogen, ethene/ethane, propene/propane mixtures as well as on the separation of C-8 aromatics with various materials. The advantages and disadvantages of each material category are discussed, and guidelines for the design of improved materials are proposed. Furthermore, challenges and future developments of each material type and separation processes are discussed.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Applied

Structured binder-free MWW-type titanosilicate with Si-rich shell for selective and durable propylene epoxidation

Jinpeng Yin et al.

Summary: By utilizing dual organic structure-directing agents to recrystallize the binder (silica)/Ti-MWW extrudates, the silica binder was converted into MWW zeolite phase to form a structured binder-free Ti-MWW zeolite with enhanced diffusion efficiency. Successive piperidine treatment and fluoridation further enhanced the activation ability of active Ti sites, resulting in a more efficient epoxidation process. Additionally, the modification effectively inhibited the side reaction of PO hydrolysis by quenching numerous Si-OH groups, leading to a high catalyst lifetime with excellent H2O2 conversion and PO selectivity.

CHINESE JOURNAL OF CATALYSIS (2021)

Article Chemistry, Physical

Synthesis of TS-1 zeolites from a polymer containing titanium and silicon

Jiacheng Xing et al.

Summary: The synthesis of TS-1 zeolites has revolutionized the green oxidation system by using H2O2 as an oxidant, with water as the only byproduct. A high-quality TS-1 zeolite, free of extra-framework Ti species, has been successfully synthesized using a novel polymer containing titanium and silicon. This method ensures a good matching of the hydrolysis rate between the silicon source and titanium source, facilitating the incorporation of titanium into the framework and exhibiting excellent catalytic performance in oxidation reactions.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

Article Chemistry, Applied

Preparation and catalytic performance of Ti-MWW zeolite membrane for phenol hydroxylation

Meihua Zhu et al.

MICROPOROUS AND MESOPOROUS MATERIALS (2018)

Article Chemistry, Physical

Direct synthesis of three-dimensional MWW zeolite with cyclohexylamine as an organic structure-directing agent

Weifeng Chu et al.

JOURNAL OF MATERIALS CHEMISTRY A (2018)

Review Chemistry, Multidisciplinary

Catalytic test reactions for the evaluation of hierarchical zeolites

Martin Hartmann et al.

CHEMICAL SOCIETY REVIEWS (2016)

Review Chemistry, Multidisciplinary

Two-Dimensional Zeolites: Current Status and Perspectives

Wieslaw J. Roth et al.

CHEMICAL REVIEWS (2014)

Article Chemistry, Physical

Post-synthesis, characterization and catalytic properties of fluorine-planted MWW-type titanosilicate

Xiangqing Fang et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2013)

Article Engineering, Chemical

Preparation of zeolite MFI membranes on alumina hollow fibers with high flux for pervaporation

Lijun Shan et al.

JOURNAL OF MEMBRANE SCIENCE (2011)

Article Chemistry, Applied

Effects of pore structure of post-treated TS-1 on phenol hydroxylation

Shang-Tien Tsai et al.

CATALYSIS TODAY (2009)

Article Engineering, Environmental

Preparation and properties of TS-1 zeolite and film using Sil-1 nanoparticles as seeds

Fangrui Qiu et al.

CHEMICAL ENGINEERING JOURNAL (2009)

Article Chemistry, Physical

XPS analysis of laser transmission micro-joint between poly (vinylidene fluoride) and titanium

Taslema Sultana et al.

APPLIED SURFACE SCIENCE (2008)

Article Materials Science, Multidisciplinary

Synthesis of Ti-containing MCM-48 by using TiF4 as titanium source

Shuai Yuan et al.

MATERIALS LETTERS (2008)

Article Chemistry, Physical

Light sensitivity of phenol hydroxylation with TS-1

R Klaewkla et al.

CATALYSIS COMMUNICATIONS (2006)

Article Chemistry, Multidisciplinary

Uniformly a-oriented MFI zeolite films by secondary growth

J Choi et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2006)

Article Chemistry, Multidisciplinary

Evidence of defect-promoted reactivity for epoxidation of propylene in titanosilicate (TS-1) catalysts: A DFT study

DH Wells et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2004)

Review Multidisciplinary Sciences

Synthesis of zeolite membranes

HY Jiang et al.

CHINESE SCIENCE BULLETIN (2004)