Pd/UiO-66 catalyst having morphology-controllable Pd metal nanocrystal core and preparation method thereof

A technology of metal nanocrystals and catalysts, applied in the field of nanomaterials, can solve problems such as limiting the application of catalysts, and achieve significant research significance and value
CN107790184AActive Publication Date: 2018-03-13SUN YAT SEN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
SUN YAT SEN UNIV
Publication Date
2018-03-13

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Abstract

The invention relates to a Pd / UiO-66 catalyst having a morphology-controllable Pd metal nanocrystal core and a preparation method and application thereof. The preparation method of the Pd / UiO-66 catalyst comprises S1: dissolving terephthalic acid in dimethyl formamide to obtain a solution A, dissolving a palladium salt in dimethyl formamide to obtain a solution B and dissolving zirconium tetrachloride in dimethyl formamide to obtain a solution C for next use, S2: mixing the solutions A and B, carrying out stirring, mixing the mixture and the solution C and adding a small molecule acid into themixed solution, S3: sealing the mixed solution obtained by the step S2, carrying out heating along with stirring for 20-26h, after the reaction, carrying out centrifugation on the mixed solution andwashing and drying the centrifugal product to obtain the Pd / UiO-66 catalyst having a morphology-controllable Pd metal nanocrystal core. The Pd / UiO-66 catalyst obtained by the one step method has controllable Pd nanocrystal morphology and the morphology-controllable Pd nanoparticle is spherical or tetrahedral. The Pd / UiO-66 catalyst has a good UiO-66 crystalline state and a high specific surface area.
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Description

technical field

[0001] The invention relates to the field of nanomaterials, in particular, to a Pd / UiO-66 catalyst with a Pd metal nanocrystal core with a controllable morphology, and a preparation method and application thereof. Background technique

[0002] Noble metal nanoparticles are widely used as catalysts due to their relatively small particle size, large specific surface area, and abundant coordinative unsaturated points and high surface activity. The unique chemical stability of noble metal materials makes it have unique catalytic stability, activity and regeneration after being made into nano-scale catalysts. The catalytic activity and selectivity of noble metal nanocrystal catalysts are largely affected by factors such as nanoparticle size, surface atomic species, and arrangement. Among them, the change of atomic arrangement is often characterized by the different morphology of nanocrystals. Therefore, in the process of synthesizing and preparing metal nanocrys...

Claims

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