Preparation of visible light response composite cuprate photocatalysis material and application thereof

A composite light and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrogen production, etc., can solve problems such as photocorrosion, short service life, and low hydrogen production efficiency

Inactive Publication Date: 2010-01-13
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, all these photocatalysts have hidden ends such as low hydrogen production efficiency under visible light, short service life or serious photocorrosion.

Method used

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  • Preparation of visible light response composite cuprate photocatalysis material and application thereof
  • Preparation of visible light response composite cuprate photocatalysis material and application thereof
  • Preparation of visible light response composite cuprate photocatalysis material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh 0.01mol copper nitrate and dissolve it in 100mL distilled water to prepare 0.1mol L -1 copper nitrate solution. Slowly add each 0.01mol of ferric nitrate and cobalt nitrate into the above-mentioned copper nitrate solution to obtain CuFeCo(NO 3 ) 8 solution. Then in the freshly prepared CuFeCo(NO 3 ) 8 Add 100mL of 0.6mol·L dropwise to the solution -1 citric acid solution to obtain a transparent sol, continue heating in a water bath at 80°C to obtain a sol, then transfer to an oven, dry at 130°C for 3 hours to obtain a precursor, and finally calcinate at 800°C for 2 hours to obtain a copper ferrite-cobaltate composite Photocatalyst (CuCoFeO 4 ). 50mmol·L -1 Oxalic acid is the electron donor, and the catalyst concentration is 1.0g L -1 , the photocatalytic hydrogen production experiment was carried out under the condition of simulating sunlight excitation, and the average hydrogen production rate was 2.46mmol·h -1 g cat -1 . Continuous experiments show ...

Embodiment 2

[0015] Weigh 0.01mol copper nitrate and dissolve it in 100mL distilled water to prepare 0.1mol L -1 copper nitrate solution. Slowly add 0.001mol of yttrium nitrate, 0.009mol of iron nitrate and 0.010mol of cobalt nitrate into the copper nitrate solution obtained above to obtain yttrium-doped CuFeCo(NO 3 ) 8 solution. Then, the newly prepared yttrium-doped CuFeCo(NO 3 ) 8 Add 100mL of 0.6mol·L dropwise to the solution -1 citric acid solution to obtain a transparent sol, continue heating in a water bath at 80°C to obtain a sol, then transfer to an oven, dry at 130°C for 3 hours to obtain a precursor, and finally calcinate at 800°C for 2 hours to obtain yttrium-doped copper ferrite-cobalt acid Copper composite photocatalyst (CuY 0.2 Fe 1.8 o 4 -CuCo 2 o 4 ). 50mmol·L -1 Oxalic acid is the electron donor, and the catalyst concentration is 1.0g L -1 , the photocatalytic hydrogen production experiment was carried out under the condition of simulating sunlight excitation...

Embodiment 3

[0017] Weigh 0.01mol copper nitrate and dissolve it in 100mL distilled water to prepare 0.1mol L -1 copper nitrate solution. Slowly add 0.0004mol of yttrium nitrate, 0.0096mol of iron nitrate and 0.010mol of cobalt nitrate to the copper nitrate solution obtained above to obtain yttrium-doped CuFeCo(NO 3 ) 8 solution. Then, the newly prepared yttrium-doped CuFeCo(NO 3 ) 8 Add 100mL of 0.6mol·L dropwise to the solution -1citric acid solution to obtain a transparent sol, continue heating in a water bath at 80°C to obtain a sol, then transfer to an oven, dry at 130°C for 3 hours to obtain a precursor, and finally calcinate at 800°C for 2 hours to obtain yttrium-doped copper ferrite-cobalt acid Copper composite photocatalyst (CuY 0.08 Fe 1.92 o 4 -CuCo 2 o 4 ) (The TEM spectrum of the sample is shown in figure 1 , the XRD pattern of the sample is shown in figure 2 ). 50mmol·L -1 Oxalic acid is the electron donor, and the catalyst concentration is 1.0g L -1 , the pho...

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Abstract

The invention relates to a method for preparing yttrium-doped copper ferrite- copper cobalt composite photocatalyst, comprising: adding ferric nitrate, cobalt nitrate and yttrium nitrate into copper nitrate solution, and obtaining a mixed cuprate solution; under the agitation in water bath, dripping citric acid solution into the newly prepared mixed cuprate solution to obtain transparent colloidal sol; continuously heating the transparent colloidal sol in the water bath to obtain gel; transferring the gel into a drying oven and drying at a certain temperature to obtain precursor, and obtaining the yttrium-doped copper ferrite- copper cobalt composite photocatalyst by calcination. The photocatalyst has the best mole ratio of 1: 1 between Fe and Co and the best yttrium-doped quantity being 4% (mole percentage) of Fe, and is good in photocatalysis hydrogen production activity under visible light. The photocatalyst has good application prospect in the aspect of hydrogen production of visible light catalytic material, simple technique, convenient operation, lower cost and long service life.

Description

technical field [0001] The invention relates to a method for preparing a composite photocatalytic material responsive under visible light. The photocatalytic material is a composite photocatalyst of yttrium-doped copper ferrite-cobaltate copper, which has better photocatalytic hydrogen production activity under visible light . Background technique [0002] As a new energy source, hydrogen is one of the hottest topics in the fields of energy and environment. The main reason is that energy and environmental problems have become increasingly severe. Fossil energy such as coal and oil on the earth will face the danger of depletion. Studies have shown that 90% of the earth's greenhouse effect is caused by human burning of fossil sources; Pollution and renewable new energy, its combustion performance is good, it ignites quickly, and it has a wide range of flammability when mixed with air. The calorific value of hydrogen is the highest among all fossil fuels, chemical fuels and bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C01B3/04
CPCY02E60/364Y02E60/36
Inventor 阎建辉唐课文易健民张丽潘阳杨海华
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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