Preparation method and application of Pt supported lanthanide fluoride-oxide photo-catalyst

A technology of lanthanum oxyfluoride and photocatalyst, which is applied in physical/chemical process catalysts, chemical instruments and methods, hydrogen production, etc. The effect of simple and easy promotion and preparation method

Inactive Publication Date: 2013-05-01
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional methods for preparing hydrogen mainly include electrolysis of water, catalytic reforming of low-carbon organic matter, etc., all of which have the disadvantage of high energy consumption, and the prospects for industrial application are not high.

Method used

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  • Preparation method and application of Pt supported lanthanide fluoride-oxide photo-catalyst
  • Preparation method and application of Pt supported lanthanide fluoride-oxide photo-catalyst
  • Preparation method and application of Pt supported lanthanide fluoride-oxide photo-catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of Pt / LaOF Catalyst

[0023] Weigh 0.0127 mol NH 4 The F solid was dissolved in 40 mL of deionized water and stirred for 2 minutes to obtain NH 4 F solution; another 0.0061 mol La 2 o 3 The solid was dissolved in 40mL deionized water, and an appropriate amount of NH was added dropwise while stirring. 4 F solution, continue to stir for 0.5 hours, transfer to an autoclave at 120°C for 24 hours at a constant temperature, centrifuge, wash, dry at 40°C, calcinate at 300°C for 6 hours, and grind to obtain white LaOF powder. The prepared LaOF was immersed in different volumes of chloroplatinic acid (1mg Pt / ml) solution, and after drying, it was reduced with 0.5mol / L sodium borohydride solution, washed, and dried at 40°C to obtain different loadings. The Pt / LaOF catalyst.

Embodiment 2

[0025] Preparation of Pt / LaOF Catalyst

[0026] Weigh 0.0127 mol NH 4 The F solid was dissolved in 40 mL of deionized water and stirred for 2 minutes to obtain NH 4 F solution; another 0.0061 mol La 2 o 3 The solid was dissolved in 40mL deionized water, and an appropriate amount of NH was added dropwise while stirring. 4 F solution was stirred for 3 hours, transferred to a high-pressure reactor at 180°C for 18 hours, and the resulting precipitate was centrifuged, washed, dried at 120°C, and calcined at 800°C for 5 hours, and ground to obtain white LaOF powder. The prepared LaOF was immersed in different volumes of chloroplatinic acid (20mg Pt / ml) solution, and after drying, it was reduced with 0.01mol / L sodium borohydride solution, washed, and dried at 80°C to obtain different loadings The Pt / LaOF catalyst.

Embodiment 3

[0028] Preparation of Pt / LaOF Catalyst

[0029] Weigh 0.0127 mol NH 4 The F solid was dissolved in 40 mL of deionized water and stirred for 2 minutes to obtain NH 4 F solution; another 0.0061 mol La 2 o 3 The solid was dissolved in 40mL deionized water, and an appropriate amount of NH was added dropwise while stirring. 4 F solution, continue to stir for 1 hour, move it into an autoclave at 90°C for 12 hours, centrifuge, wash, dry at 60°C, calcinate at 500°C for 3 hours, and grind to obtain white LaOF powder. The prepared LaOF was immersed in different volumes of chloroplatinic acid (10mg Pt / ml) solution, and after drying, it was reduced with 0.01~0.5mol / L sodium borohydride solution, washed, and dried at 120°C to obtain different Pt / LaOF catalysts with loading (0 wt% ~2 wt%). figure 1 The X-ray diffraction (XRD) patterns of Pt / LaOF and LaOF with a platinum loading of 1wt% of the new photocatalyst of the present invention are shown. Compared with the XRD pattern of LaOF, t...

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Abstract

The invention discloses a preparation method and an application of Pt supported lanthanide fluoride-oxide photo-catalyst. 0.1to 10 wt% of Pt is supported on the surface of the lanthanide fluoride-oxide Pt / LaO(1-x)F(1+2x), wherein x=0, 0.3, 0.35 and 0.4. The invention firstly applies platinum supported lanthanide fluoride-oxide to the field of preparing hydrogen by photo-catalytically decomposing water. The preparation method of the invention is simple, easy to operate, dose not need expensive complex equipment and has gentle synthesis conditions, so it is suitably popularized on a large scale.

Description

technical field [0001] The invention belongs to the technical field of novel material preparation and hydrogen production by photolysis of water, and specifically relates to a preparation method and application of a Pt-loaded lanthanum oxyfluoride photocatalyst. Background technique [0002] Coal, oil and other natural energy sources will face the danger of depletion. At the same time, the environmental pollution and greenhouse effect caused by the burning of fossil energy sources will prompt people to look for new energy sources. Since the only product of hydrogen combustion is water, its high heat of combustion and no environmental pollution is considered to be an alternative energy source for traditional fossil fuels. The traditional methods for preparing hydrogen mainly include electrolysis of water and catalytic reforming of low-carbon organic matter, etc., all of which have the disadvantage of high energy consumption, and the prospects for industrial application are no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/13C01B3/04
CPCY02E60/364Y02E60/36
Inventor 苏文悦解泉华付贤智刘平陈旬丁正新吴棱员汝胜
Owner FUZHOU UNIV
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