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Phosphotungstic acid supported Pd-metal-organic framework (MOF) catalyst

A technology of metal-organic framework and phosphotungstic acid, which is applied in the field of photocatalysis, can solve the problems of time-consuming, reducing agents and stabilizers, etc., and achieve the effects of great universality, simple and easy preparation method, and high recycling efficiency

Inactive Publication Date: 2017-05-31
FUZHOU UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies in the prior art, to provide a phosphotungstic acid-loaded Pd-metal organic framework catalyst and its preparation method and application, and to reduce positive divalent palladium ions by metals with variable valence states in the carrier Metal-forming palladium is deposited on the surface of the carrier, which solves the problems of time-consuming preparation of noble metal / metal-organic framework composite catalysts in the prior art, and the need for reducing agents and stabilizers. The prepared Pd-PTA-MIL-100 (Fe) composite material can be Applied in the field of photocatalysis

Method used

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  • Phosphotungstic acid supported Pd-metal-organic framework (MOF) catalyst
  • Phosphotungstic acid supported Pd-metal-organic framework (MOF) catalyst
  • Phosphotungstic acid supported Pd-metal-organic framework (MOF) catalyst

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Embodiment 1

[0024] Preparation of Pd-PTA-MIL-100(Fe) Catalyst

[0025] Add 8 mL of ethanol, 8 mL of water, and 0.05 g of carrier into a Pyrex glass bottle, and ultrasonicate for 45 min at a power of 100 W to disperse them evenly. After the glass bottle was filled with nitrogen to remove the oxygen in the solution, the above dispersion was irradiated with ultraviolet light (254 nm) for 20 min, and the color of the suspension became slightly darker, which was due to the presence of blue (PW 12 o 40 ) 4− generate. Generated (PW 12 o 40 ) 4− In aqueous ethanol, in N 2 It can exist stably under the atmosphere. When 294 μL of 10 mg / mL H 2 PdCl 4 , Pd 2+ can be (PW 12 o 40 ) 4− Fast reduction to generate Pd 0 , while (PW 12 o 40 ) 4− can be oxidized back (PW 12 o 40 ) 3− , and finally Pd-PTA-MIL-100(Fe) composites were obtained. Taking the 1%Pd-3%PTA-MIL-100(Fe) sample as an example, figure 1 The X-ray powder diffraction spectrum of the 1%Pd-3%PTA-MIL-100 (Fe) catalyst synt...

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Abstract

The invention discloses a phosphotungstic acid supported Pd-metal-organic framework (MOF) catalyst and a preparation method and application thereof. A Pd-PTA-MIL-100(Fe) composite material is obtained through dispersing a support, i.e., PTA-MIL-100(Fe) in an ethanol-water solution, rapidly reducing (PW12O40)<3-> into (PW12O40)<4-> by using ultraviolet irradiation in an N2 atmosphere, and adding H2PdCl4 to instantly reduce Pd<2+> by (PW12O40)<4->. High-dispersion noble-metal Pd nanoparticles are grown on the MOF by using a (PW12O40)<4-> assisted method, and this process does not need any additional reducer, surfactant and organic stabilizer and a heat treatment process. The prepared Pd nanoparticles are good in dispersity and high in utilization ratio and have a very efficient room-temperature photocatalytic degradation effect on drugs and personal nursing materials in water environments.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis in environmental treatment, and in particular relates to a phosphotungstic acid-loaded Pd-metal organic framework catalyst. Background technique [0002] Metal-organic frameworks (MOFs) are a new class of porous materials with a periodic network structure composed of metal cations as nodes and organic ligands as linkers. In recent years, photocatalytic technology based on MOFs has attracted extensive attention. However, combined with the actual situation of photocatalytic applications, we found that the currently studied photocatalytic technology based on MOFs materials still has many problems such as low separation efficiency of photogenerated carriers and low utilization rate of solar energy. In order to further optimize the performance of MOFs photocatalysts, noble metals such as Au, Pd, and Pt with excellent electrical and catalytic properties are introduced into MOFs. [0003] There ...

Claims

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Application Information

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IPC IPC(8): B01J31/28C02F1/30
CPCC02F1/30B01J31/28C02F2305/10B01J35/39
Inventor 吴棱梁若雯景芬芬陈蕊
Owner FUZHOU UNIV
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