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Molten salt method for preparing iron trioxide loaded platinum metal nanometer catalyst in situ

A technology of in-situ preparation and molten salt method, which is used in physical/chemical process catalysts, catalyst activation/preparation, chemical instruments and methods, etc., to achieve low cost raw materials, controllable product particle morphology and crystal structure, and simple preparation process. Effect

Inactive Publication Date: 2017-03-29
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth pointing out that, so far, there is no in situ (i.e., one-step) preparation of Fe by the molten salt method. 2 o 3 Nanomaterials loaded with Pt nanoparticles (i.e., Pt / Fe 2 o 3 Nanocatalyst) literature reports

Method used

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  • Molten salt method for preparing iron trioxide loaded platinum metal nanometer catalyst in situ
  • Molten salt method for preparing iron trioxide loaded platinum metal nanometer catalyst in situ
  • Molten salt method for preparing iron trioxide loaded platinum metal nanometer catalyst in situ

Examples

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Effect test

Embodiment 1

[0012] Example 1: Weigh 0.25g of tetraammine platinum nitrate, put it in a beaker, add 60.5ml of deionized water, stir for 10min to make it evenly mixed, and transfer it to a 200ml brown jar. A tetraammine platinum nitrate solution can be obtained, which is left to stand for use. Weigh NaNO 3 (29.4g), NaF (0.6g), Fe 2 (SO 4 ) 3 (2.0g) was placed in a 100ml crucible, and 1.031ml of the tetraammineplatinum nitrate solution prepared above was taken, added dropwise into the crucible, and dried in an oven at 80°C. After complete drying, ball mill in a ball mill for 20 minutes to mix evenly, then transfer to a muffle furnace for roasting, rise from room temperature to 350 °C at a rate of 3 °C / min, keep warm for 3 hours, cool naturally to room temperature, and dissolve , suction filtration, washing, and drying, a nanocatalyst with a theoretical noble metal loading of 0.5% can be prepared, that is, 0.5% Pt / Fe 2 o 3 nanocatalyst.

Embodiment 2

[0013] Embodiment 2: take by weighing NaNO 3 (29.4g), NaF (0.6g), Fe 2 (NO 3 ) 3 (2.0g) was placed in a 100ml crucible, and 1.021ml of tetraammine platinum nitrate solution prepared in Example 1 above was taken, added dropwise to the crucible, and dried in an oven at 80°C. After complete drying, ball mill in a ball mill for 20 minutes to mix evenly, then transfer to a muffle furnace for roasting, rise from room temperature to 350 °C at a rate of 3 °C / min, keep warm for 3 hours, cool naturally to room temperature, and dissolve , suction filtration, washing, and drying, a nanocatalyst with a theoretical noble metal loading of 0.5% can be prepared, that is, 0.5% Pt / Fe 2 o 3 nanocatalyst.

Embodiment 3

[0014] Embodiment 3: take by weighing NaNO 3 (29.4g), NaF (0.6g), FeCl 3 (2.0g) was placed in a 100ml crucible, and 1.527ml of the tetraammine platinum nitrate solution prepared in Example 1 above was taken, added dropwise to the crucible, and dried in an oven at 80°C. After complete drying, ball mill in a ball mill for 20 minutes to mix evenly, then transfer to a muffle furnace for roasting, rise from room temperature to 350 °C at a rate of 3 °C / min, keep warm for 3 hours, cool naturally to room temperature, and dissolve , suction filtration, washing, and drying, a nanocatalyst with a theoretical noble metal loading of 0.5% can be prepared, that is, 0.5% Pt / Fe 2 o 3 nanocatalyst.

[0015] The preparation method of the present invention is novel, the raw material is cheap, the preparation process is simple, the particle shape of the product is controllable, and the yield is high. The obtained Pt / Fe 2 o 3 Nanomaterials have good catalytic properties for xylene oxidation.

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Abstract

The invention relates to a molten salt method for preparing an iron trioxide loaded platinum metal nanometer catalyst in situ, belonging to the field of nanometer material preparation. The method comprises the following steps: firstly, uniformly mixing NaNO3, NaF, ferric salt and [Pt(NH3)4](NO3)2 which are weighed according to ratio; transferring the mixture into a muffle furnace; increasing temperature to 350 DEG C from room temperature according to the rate of 3 DEG C / min; maintaining the temperature for 2-7h; naturally cooling to room temperature; dissolving, filtering, washing and drying, thereby acquiring Pt / Fe2O3 nanometer material. The molten salt method has the advantages of low-cost and easily available raw materials, simple preparation process, excellent catalytic performance, and the like.

Description

technical field [0001] The invention relates to an in-situ preparation of Fe 2 o 3 A molten salt method for loading Pt nanoparticles on nanomaterials, specifically involving the use of NaNO 3 In Situ Preparation of Pt / Fe in NaF Molten Salt System 2 o 3 The nanometer catalyst method belongs to the field of nanometer material preparation. Background technique [0002] At present, my country's air pollution is serious, and volatile organic compounds (VOC) are the main source of air pollution. Many VOC components (such as toluene, xylene, formaldehyde, etc.) themselves have serious hazards to human health. In view of this, the treatment and elimination of VOC is a very critical task at present. The methods for eliminating VOC mainly include adsorption method, incineration method, plasma method and catalytic oxidation method. Among them, the catalytic oxidation method is recognized as one of the most effective means to completely eliminate low-concentration VOCs, and the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J37/08B01D53/86B01D53/72
CPCB01D53/864B01D53/8687B01J23/8906B01J37/088B01D2258/06B01D2257/708B01J35/40
Inventor 邓积光夏昱邹灏然戴洪兴刘雨溪
Owner BEIJING UNIV OF TECH
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