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Применить Всего найдено 4. Отображено 4.
21-03-2019 дата публикации

ORDERED MACROPOROUS METAL-ORGANIC FRAMEWORKS SINGLE CRYSTAL AND PREPARATION METHOD THEREFOR

Номер: WO2019052014A1
Автор: SHEN, Kui, LI, Yingwei, CAO, Yonghai, CHEN, Junying
Принадлежит:

The present invention discloses an ordered macroporous metal-organic frameworks (MOFs) single crystal and a preparation method therefor. The method adopts a three-dimensional structure accumulated by polymer microspheres as a template and comprises: first depositing precursors of MOFs, i.e., dimethylimidazole and zinc nitrate, inside the three-dimensional template, then immersing the three-dimensional template containing the precursors in a mixed solution of aqueous ammonia and methanol, performing crystallization and then taking out the three-dimensional template, performing immersion in an organic solvent to remove the polymer three-dimensional template, and performing centrifugation to obtain the ordered macroporous MOFs single crystal. The ordered macroporous MOFs single crystal has the basic framework of zeolitic imidazolate framework-8; however, the structure of the ordered macroporous MOFs single crystal contains highly-structured ordered macropores. The diameter of the macropores ...

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Номер записи: 1
22-03-2018 дата публикации

METHOD FOR PREPARING Ε-CAPROLACTONE

Номер: WO2018049733A1
Автор: YU, Hao, HOU, Mengmeng, PENG, Feng, CAO, Yonghai, WANG, Hongjuan
Принадлежит:

A method for preparing ε-caprolactone is provided. The method comprises the following steps: adding a cyclohexanone, an auxiliary oxidant, a certain amount of catalyst and a molecular oxygen as an oxidant into a certain amount of organic solvent, wherein the auxiliary oxidant is an acrolein, and the catalyst is a carbon material; stirring the reaction for 0.1-24 h under a pressure of 0.1-2 MPa and a temperature of 60-100°C. The method has the advantages of using a high efficiency auxiliary oxidant, an easily available and recovered catalyst, and an environmentally friendly oxidant, simple operation and low cost.

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Номер записи: 2
27-06-2023 дата публикации

Bismuth-based metal organic framework material as well as preparation method and application thereof

Номер: CN116333333A
Автор: WANG HONGJUAN, FENG XINGBIN, DING JIARUI, YANG XIXIAN, YU HAO, CAO YONGHAI
Принадлежит:

The invention discloses a bismuth-based metal organic framework material as well as a preparation method and application thereof. The preparation method of the bismuth-based metal organic framework material comprises the following steps: dispersing bismuth salt and trimesic acid in a solvent, and carrying out microwave reaction to obtain the bismuth-based metal organic framework material. The bismuth-based metal organic framework material disclosed by the invention is a regular hexagonal prism, is uniform in crystal size, uniform in bismuth element distribution and high in relative content, and can show excellent formic acid Faraday efficiency when being applied to a CO2 electroreduction system; and the preparation method has the advantages of rapidness, simplicity, feasibility, wide raw material source, low price, low equipment requirement, controllable preparation process, environmental protection and the like, is easy to realize large-scale preparation, and has a wide application prospect ...

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Номер записи: 3
18-08-2023 дата публикации

PtRhPdIrAu/C precious metal high-entropy alloy nanoparticles and preparation method and application thereof

Номер: CN116604028A
Автор: LI SHUANG, HUANG XIANFENG, YANG GUANGXING, YU HAO, WANG HONGJUAN, CAO YONGHAI, WANG HAOFAN
Принадлежит:

A preparation method of PtRhPdIrAu/C precious metal high-entropy alloy nanoparticles comprises the following specific steps: mixing a platinum precursor, rhodium chloride hydrate, palladium chloride, iridium chloride hydrate and chloroauric acid to form a precious metal precursor, and dissolving the precious metal precursor in triethylene glycol to form a precursor solution; dissolving a protective agent in triethylene glycol, heating, dropwise adding the precursor solution, stirring, and immediately cooling to room temperature to obtain high-entropy alloy nanoparticle sol; the preparation method comprises the following steps: dissolving a carrier material in ethanol, carrying out constant-temperature ultrasonic treatment and crushing treatment, adding the high-entropy alloy nanoparticle sol, carrying out crushing treatment again, and sequentially stirring, washing and drying to obtain a product. The invention further discloses the PtRhPdIrAu/C precious metal high-entropy alloy nano particle ...

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Номер записи: 4