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Photocatalyst for visible light transformation and preparation method of same

A photocatalyst and visible light technology, applied in the fields of environment and energy, can solve the problem that the visible light catalytic efficiency needs to be further improved, and achieve the effects of high visible light catalytic activity, stable structure and simple preparation method.

Active Publication Date: 2012-07-11
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although there are many methods to improve the TiO 2 Visible light catalytic performance, but TiO 2 Visible photocatalytic efficiency still needs to be further improved

Method used

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  • Photocatalyst for visible light transformation and preparation method of same
  • Photocatalyst for visible light transformation and preparation method of same
  • Photocatalyst for visible light transformation and preparation method of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve 0.6g of phenol and 1mL of 37% formaldehyde solution into 15mL of 0.1M NaOH aqueous solution and keep warm at 70°C for 0.5h. At the same time, add 15mL of aqueous solution containing 0.91g of surfactant F127 (commercially available) and mix well. After mixing, the solution Keep the temperature at 66° C. for 2 hours, then add 50 mL of water to the solution and keep it for 16 hours. Finally, 15mL of the solution was mixed with 56mL of water, and kept in a 130°C reactor for 24h. The final product was centrifuged and washed with ethanol for 3 times to obtain phenolic resin (NS-PR), whose powder particle size was about 80nm.

[0025] Add NS-PR to 70mL ethanol solution, then add 0.4mL isopropyl titanate to the system, keep it warm at 180°C for 15h, filter and wash the product through ethanol, and dry at 105°C to obtain a yellow powder In order to further improve the catalytic activity, after drying in N 2 In the atmosphere, the air flow rate is 60ml / min, heated at...

Embodiment 2

[0028] Take 1g of phenol, dissolve 1mL of 37% formaldehyde solution into 15mL of 0.1M NaOH aqueous solution, incubate at 70°C for 0.5h, incubate at 130°C for 24h, centrifuge the final product, wash with ethanol repeatedly for 3 times, and obtain the phenolic resin ( NS-PR), the powder particle size is about 200nm.

[0029]Add NS-PR to 70mL ethanol solution, then add 0.4mL isopropyl titanate to the system, keep it warm at 180°C for 15h, filter and wash the product through ethanol, and dry at 105°C to obtain a yellow powder In order to further improve the catalytic activity, after drying in N 2 In the atmosphere, the air flow rate is 60ml / min, heated at 300°C for 3h to obtain Catalyst, the catalyst can degrade methyl orange at a rate of 10 mg / g under visible light conditions.

Embodiment 3

[0031] Dissolve 0.6g of phenol and 1mL of 37% formaldehyde solution into 15mL of 0.1M NaOH aqueous solution and keep it warm at 70°C for 0.5h. At the same time, add 15mL of aqueous solution containing 0.91g of surfactant F127 and mix well. After mixing, the solution is kept at 66°C 2h, then 50mL of water was added to the solution and incubated for 16h. Finally, 15mL of the solution was mixed with 56mL of water, and kept in a 130°C reactor for 24h. The final product was centrifuged and washed with ethanol for 3 times to obtain phenolic resin (NS-PR), whose powder particle size was about 80nm.

[0032] Add NS-PR to 70mL ethanol solution, then add 1.5mL isopropyl titanate to the system, keep it warm at 180°C for 15h, filter and wash the product through ethanol, and dry at 105°C to obtain a yellow powder In order to further improve the catalytic activity, after drying in N 2 In the atmosphere, the air flow rate is 60ml / min, heated at 300°C for 3h to obtain Catalyst (see fig...

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Abstract

The invention relates to the field of environment and energy and in particular relates to a photocatalyst with nano-heterostructure for visible light transformation and a preparation method of the photocatalyst. The photocatalyst for visible light transformation has a nano-heterostructure which is formed by loading TiO2 precursor on the surface of phenolic resin by means of surface bonding, wherein the mass ratio of phenolic resin / TiO2 precursor is 1: (100 to 0.1). According to the invention, titanium oxide is loaded on the surface of phenolic resin particles by low temperature hydrothermal treatment or solvent thermal treatment, to form TiO2 / phenolic resin heterostructure on the surface of phenolic resin; and the heterostructure has high visible light catalytic activity under visible light conditions. The catalyst provided by the invention has the advantages of high visible light response, high catalytic activity and stable structure.

Description

technical field [0001] The invention relates to the fields of environment and energy, in particular to a nano-heterostructure photocatalyst for visible light conversion and a preparation method thereof. Background technique [0002] Environment and energy are major issues facing and urgently to be resolved in the sustainable development of mankind in the 21st century. Solar energy has the advantages of being cheap, clean, and renewable. Therefore, it is the goal of people's efforts to develop efficient and fast solar energy conversion and storage technologies to achieve sustainable human development. However, due to the structure of most semiconductor catalysts, it is difficult to efficiently utilize visible light, which is a bottleneck problem that plagues the industrialization of solar energy conversion technology. There are many kinds of photocatalysts, and TiO 2 It has been widely studied for its advantages of stable structure, low price, non-toxicity and strong oxidat...

Claims

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Application Information

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IPC IPC(8): B01J31/38C02F1/30B01D53/86C01B3/04
CPCY02E60/364Y02E60/36
Inventor 姜义军牟新东孟令倩李秀涛王喜成王晓燕
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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