Synthesis of high performance SAPO-34 zeolite membrane by a novel two-step hydrothermal synthesis + dry gel conversion method

Dense and good catalytic performance TS-1 zeolite membranes were rapidly prepared on porous mullite support by secondary hydrothermal synthesis. The properties of seed crystals were very important for the preparation of high-catalytic performance TS-1 zeolite membranes. Influences of seed crystals (Ti/Si ratios, size, morphology, and zeolites concentration of the seed suspension) on the growth and catalytic property of TS-1 zeolite membranes were investigated in details. High Ti/Si ratio, medium-size, and morphology of the seed crystals were critical for preparing the high-performance TS-1 zeolite membrane. Compared with the bi-layer TS-1 zeolite membrane (inner and outer of the mullite tube), the mono-layer TS-1 zeolite membrane had a better catalytic performance for Isopropanol IPA oxidation with H2O2. When the Ti/Si ratio, size, and morphology of the TS-1 zeolites were 0.030, 300 nm, ellipsoid, and the zeolites concentration of the seed suspension was 5%, the IPA conversion, and flux through the TS-1 zeolite membrane were 98.23% and 2.58 kg·m−2·h−1, respectively.

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Synthesis of nano-ZSM-5 zeolite via a dry gel conversion crystallization process and its application in MTO reaction

CrystEngComm ◽

10.1039/d1ce00162k ◽

2021 ◽

Vol 23 (15) ◽

pp. 2793-2800

Author(s):

Xueshuai Chen ◽

Rongli Jiang ◽

Yu Gao ◽

Zihan Zhou ◽

Xingwen Wang

Keyword(s):

Crystallization Process ◽

Catalytic Properties ◽

Dry Gel Conversion ◽

Mto Reaction ◽

Conversion Method

Nano-sized ZSM-5 with superior catalytic properties was synthesized from LAPONITE® as one of the Si sources by a dry gel conversion method.

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One-step hydrothermal synthesis of sulfur-doped Ni2(OH)2CO3 neuroid network combined with multi-walled carbon nanotubes for high-performance asymmetric supercapacitors

Diamond and Related Materials ◽

10.1016/j.diamond.2021.108451 ◽

2021 ◽

pp. 108451

Author(s):

Jinfeng Zheng ◽

Xiao Lian ◽

Mingzai Wu ◽

Fangcai Zheng ◽

Yuanhao Gao ◽

...

Keyword(s):

Carbon Nanotubes ◽

Hydrothermal Synthesis ◽

High Performance ◽

Asymmetric Supercapacitors ◽

Multi Walled Carbon Nanotubes ◽

One Step ◽

Walled Carbon Nanotubes

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Hydrothermal synthesis of monoclinic vanadium dioxide nanocrystals using phase-pure vanadium precursors for high-performance smart windows

Solar Energy Materials and Solar Cells ◽

10.1016/j.solmat.2021.111055 ◽

2021 ◽

Vol 226 ◽

pp. 111055

Author(s):

Jong Bae Kim ◽

Donguk Lee ◽

In Hyeok Yeo ◽

Ho Young Woo ◽

Dong Wan Kim ◽

...

Keyword(s):

Hydrothermal Synthesis ◽

Vanadium Dioxide ◽

High Performance ◽

Smart Windows ◽

Phase Pure

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Computational Molecular Modeling of Transport Processes in Nanoporous Membranes

Processes ◽

10.3390/pr6080124 ◽

2018 ◽

Vol 6 (8) ◽

pp. 124 ◽

Cited By ~ 10

Author(s):

Kevin Hinkle ◽

Xiaoyu Wang ◽

Xuehong Gu ◽

Cynthia Jameson ◽

Sohail Murad

Keyword(s):

Molecular Modeling ◽

Temporal Resolution ◽

High Performance ◽

Low Cost ◽

Membrane Surface ◽

Experimental Studies ◽

Nanoporous Materials ◽

Transport Processes ◽

Zeolite Membrane ◽

Nanoporous Membranes

In this report we have discussed the important role of molecular modeling, especially the use of the molecular dynamics method, in investigating transport processes in nanoporous materials such as membranes. With the availability of high performance computers, molecular modeling can now be used to study rather complex systems at a fraction of the cost or time requirements of experimental studies. Molecular modeling techniques have the advantage of being able to access spatial and temporal resolution which are difficult to reach in experimental studies. For example, sub-Angstrom level spatial resolution is very accessible as is sub-femtosecond temporal resolution. Due to these advantages, simulation can play two important roles: Firstly because of the increased spatial and temporal resolution, it can help understand phenomena not well understood. As an example, we discuss the study of reverse osmosis processes. Before simulations were used it was thought the separation of water from salt was purely a coulombic phenomenon. However, by applying molecular simulation techniques, it was clearly demonstrated that the solvation of ions made the separation in effect a steric separation and it was the flux which was strongly affected by the coulombic interactions between water and the membrane surface. Additionally, because of their relatively low cost and quick turnaround (by using multiple processor systems now increasingly available) simulations can be a useful screening tool to identify membranes for a potential application. To this end, we have described our studies in determining the most suitable zeolite membrane for redox flow battery applications. As computing facilities become more widely available and new computational methods are developed, we believe molecular modeling will become a key tool in the study of transport processes in nanoporous materials.

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Hierarchical CoMoO4@Co3O4 nanocomposites on an ordered macro-porous electrode plate as a multi-dimensional electrode in high-performance supercapacitors

Journal of Materials Chemistry A ◽

10.1039/c7ta04981a ◽

2017 ◽

Vol 5 (33) ◽

pp. 17312-17324 ◽

Cited By ~ 48

Author(s):

Mai Li ◽

Yuanhao Wang ◽

Hongxing Yang ◽

Paul K. Chu

Keyword(s):

Hydrothermal Synthesis ◽

High Performance ◽

Porous Electrode ◽

Large Power ◽

Electrode Plate

Hydrothermal synthesis of CoMoO4@Co3O4 nanocomposites on an OMEP as a multidimensional electrode, and its use in a CoMoO4@Co3O4/OMEP//AC supercapacitor, which delivered large power and stable cycling.

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