Preparation method of metal-organic framework zif-8 membrane-coated supported noble metal efficient core-shell catalyst with tunable selectivity
A technology of noble metal catalysts and metal-organic frameworks, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve wide application prospects and high selectivity
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Embodiment 1
[0029] (1) Preparation of Pd nanoparticles
[0030] First prepare 2mMH 2 PdCl 4 aqueous solution, and then with PVP, H 2 After mixing O and HCl, heat to boiling, add ethanol immediately, and reflux for 3h;
[0031] (2) SiO 2 Preparation of vector
[0032] According to stober method, using TEOS as silicon source, NH 4 OH is used as a catalyst, and it is hydrolyzed at room temperature for 1 hour under the mixed system of ethanol / water;
[0033](3) Combine the Pd nanoparticles obtained by method (1) with the SiO obtained by method (2) 2 Mix at room temperature for 24 hours to obtain Pd / SiO 2 catalyst;
[0034] (4) Pd / SiO obtained by method (3) 2 Mix the aqueous solution with the PDDA aqueous solution, let it stand at room temperature for 30 minutes, and then centrifugally wash it with deionized water for several times; then mix it with the PSS aqueous solution at room temperature for 30 minutes, and then centrifugally wash it with deionized water and methanol for several...
Embodiment 2
[0038] (1) Preparation of Pd nanoparticles
[0039] First prepare 2mMH 2 PdCl 4 aqueous solution, and then with PVP, H 2 After mixing O and HCl, heat to boiling, add ethanol immediately, and reflux for 3h;
[0040] (2) SiO 2 Preparation of vector
[0041] According to stober method, using TEOS as silicon source, NH 4 OH is used as a catalyst, and it is hydrolyzed at room temperature for 1 hour under the mixed system of ethanol / water;
[0042] (3) Combine the Pd nanoparticles obtained by method (1) with the SiO obtained by method (2) 2 Mix at room temperature for 24 hours to obtain Pd / SiO 2 catalyst;
[0043] (4) The catalyst obtained in method (3) was vacuum-dried overnight at 80°C and placed in a desiccator for testing.
Embodiment 3
[0045] (1) Preparation of Pd nanoparticles
[0046] First prepare 2mMH 2 PdCl 4 aqueous solution, and then with PVP, H 2 After mixing O and HCl, heat to boiling, add ethanol immediately, and reflux for 3h;
[0047] (2) SiO 2 Preparation of vector
[0048] According to stober method, using TEOS as silicon source, NH 4 OH is used as a catalyst, and it is hydrolyzed at room temperature for 1 hour under the mixed system of ethanol / water;
[0049] (3) Combine the Pd nanoparticles obtained by method (1) with the SiO obtained by method (2) 2 Mix at room temperature for 24 hours to obtain Pd / SiO 2 catalyst;
[0050] (4) Pd / SiO obtained by method (3) 2 Mix the aqueous solution with the PDDA aqueous solution, let it stand at room temperature for 30 minutes, and then centrifugally wash it with deionized water for several times; then mix it with the PSS aqueous solution at room temperature for 30 minutes, and then centrifugally wash it with deionized water and methanol for severa...
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Abstract
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Application Information
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