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Platinum/attapulgite nano supported catalyst, and preparation method and application thereof

A technology of supporting catalysts and attapulgite, which is applied in the chemical field, can solve problems such as post-processing troubles and complex reactions, and achieve the effects of easy separation, high catalytic activity, and easy control

Inactive Publication Date: 2014-04-09
YANCHENG TEACHERS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal acid, Raney nickel, etc. are often used in the reduction of nitrobenzene, which make the reaction more complicated and the post-treatment more troublesome

Method used

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  • Platinum/attapulgite nano supported catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Pretreatment of attapulgite

[0025] The attapulgite is pulverized and ground with a mortar, and the ground attapulgite is screened with a 200-300 mesh sieve. Add 80 ml of hydrochloric acid solution with a concentration of about 5% to 5 grams of screened attapulgite, reflux at 70°C for 3 hours, and wash with deionized water until PH=6.0. Vacuum-dried in a vacuum desiccator until it was dried to a constant weight, and used for subsequent experiments.

[0026] (2) Preparation of Platinum Nanosol

[0027] In a 500ml beaker, accurately measure 3.86×10 -3 mol / L chloroplatinic acid aqueous solution 15 milliliters, add 150 milliliters of deionized water, then add 4.18×10 -4 20 ml of mol / L polyvinylpyrrolidone aqueous solution, the mixture was stirred on a magnetic stirrer for about 30 minutes, and 0.03 g of sodium borohydride was added to prepare a platinum sol.

[0028] (3) Preparation of Pt / ATP nano-catalyst

[0029] Accurately weigh 0.7507 g of the attapulgite trea...

Embodiment 2

[0038] (1) Pretreatment of attapulgite

[0039] The attapulgite is pulverized and ground with a mortar, and the ground attapulgite is screened with a 200-mesh sieve. Add 120 milliliters of 5% sulfuric acid solution in 10 grams of screened attapulgite, after refluxing at 80 DEG C for 4 hours, clean with deionized water until pH=7.0, after cleaning, the product obtained will Vacuum-dry in a vacuum desiccator until it reaches a constant weight for subsequent experiments.

[0040] (2) Preparation of Platinum Nanosol

[0041] In a 500ml beaker, accurately measure 3.86×10 -3 mol / L chloroplatinic acid aqueous solution 10 ml, add 100 ml deionized water, then add 2.76×10 -4 21 ml of mol / L polyvinylpyrrolidone aqueous solution, the mixture was stirred on a magnetic stirrer for about 30 minutes, and 0.022 g of potassium borohydride was added to prepare a platinum sol.

[0042] (3) Preparation of Pt / ATP nano-catalyst

[0043] Accurately weigh 0.7510 g of the attapulgite treated in (1...

Embodiment 3

[0051] (1) Pretreatment of attapulgite

[0052]The attapulgite is pulverized and ground with a mortar, and the ground attapulgite is screened with a 300-mesh sieve. Add 120 milliliters of 7% hydrochloric acid solution to 12 grams of screened attapulgite, and after reflux at 75° C. for 5 hours, clean with deionized water until pH=8.0. Vacuum-dry in a vacuum desiccator until it reaches a constant weight for subsequent experiments.

[0053] (2) Preparation of Platinum Nanosol

[0054] In a 500ml beaker, accurately measure 3.86×10 -3 mol / L chloroplatinic acid aqueous solution 10 ml, add 100 ml deionized water, then add 2.76×10 -4 21 ml of mol / L polyvinylpyrrolidone aqueous solution, the mixture was stirred on a magnetic stirrer for about 40 minutes, and 0.022 g of potassium borohydride was added to prepare a platinum sol.

[0055] (3) Preparation of Pt / ATP nano-catalyst

[0056] Accurately weigh 0.7610 g of the attapulgite treated in (1) into the platinum sol prepared above, ...

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Abstract

The invention discloses a platinum / attapulgite nano supported catalyst, and a preparation method and an application thereof. A carrier of the catalyst is attapulgite (ATP), and an active component is Pt nanoparticles with the average particle size of 4-6 nm. The average mass fraction of Pt in the catalyst is about 0.5%-1%, and the residual component of the catalyst is ATP. The preparation method comprises the steps: firstly adopting an acid to treat mineral impurities on the surface of ATP, and drying for standby application; with polyvinylpyrrolidone and other polymers as stabilizers, adopting reducing agents to reduce chloroplatinic acid, and thus obtaining a Pt sol; adding the treated ATP into the Pt sol, stirring, filtering, drying, and thus finally obtaining the Pt / ATP nano supported catalyst. The catalyst prepared by the method has quite high catalytic activity on reduction of nitrophenol into aminophenol.

Description

technical field [0001] The invention belongs to the technical field of chemistry, and relates to a preparation method and application thereof of a nano-loaded catalyst, in particular to a preparation method and application of a platinum / attapulgite (Pt / ATP) nano-loaded catalyst. Background technique [0002] In recent decades, supported nanocatalysts have been widely used. There are increasing reports on the interaction between metals and supports. It is well known that special interactions between metals and supports can affect the surface properties of catalysts and thus their catalytic activity. For example, in Al 2 o 3 Cobalt ions migrate to Al during the process of loading metal cobalt on the carrier 2 o 3 CoAl is formed in the lattice of 2 o 4 compound. Iron oxides and transition metal oxides or their carbonates undergo solid-solid interactions to form the corresponding ferrite oxides CoFe 2 o 4 . Platinum nanoparticles have high surface energy and are prone...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J37/16C07C213/02C07C215/76
Inventor 戴兢陶陈社云王成崔祥王岑岭
Owner YANCHENG TEACHERS UNIV
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