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a gns/copcs/tio 2 Preparation method of photocatalyst

A photocatalyst and catalytic degradation technology, applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problems of large reducing agent, secondary pollution, consumption, etc. , to achieve the effect of improving adsorption performance, realizing degradation, and broadening the response range

Active Publication Date: 2019-11-12
HOHAI UNIV
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  • Application Information

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Problems solved by technology

The most commonly used method to treat Cr(VI) is to add a certain amount of reducing agent to convert Cr(VI) into Cr(III), and then form Cr(OH) under alkaline conditions. 3 Precipitation and removal, but this method consumes a large amount of reducing agent and is likely to cause secondary pollution

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  • a gns/copcs/tio <sub>2</sub> Preparation method of photocatalyst
  • a gns/copcs/tio <sub>2</sub> Preparation method of photocatalyst
  • a gns/copcs/tio <sub>2</sub> Preparation method of photocatalyst

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Embodiment 1

[0028] GNs / CoPcS / TiO of the present invention 2 The preparation method of photocatalyst comprises the steps:

[0029] Step 1, using the airtight oxidation method, add 1g of graphite powder, 5g of potassium permanganate, and 50mL of concentrated sulfuric acid into the reaction kettle in turn, put them in the refrigerator and freeze at 0°C for 2 hours, then quickly put them into the oven, and put them in the oven at 80°C Dry for 2h to obtain product A;

[0030] Step 2, after cooling the product A, dilute it with more than 5 times the volume of ultrapure water, then add 15mL of hydrogen peroxide until the solution turns khaki, let it stand to take out the precipitate, and use 1% dilute hydrochloric acid and deionized Washing with water for 3 times, drying to obtain graphene oxide (GO), and dissolving the obtained graphene oxide in absolute ethanol for ultrasonic treatment to obtain a graphene dispersion;

[0031] Step 3: After mixing 10 mL of butyl titanate, 3.2 mL of acetic ac...

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Abstract

The invention discloses a GNs / CoPcS / TiO 2 Preparation method of photocatalyst, the preparation method of the present invention is by adding titanium dioxide (TiO 2 ), graphene oxide (GO) and sulfonated cobalt phthalocyanine (CoPcS) to form a heterojunction, which effectively increases the specific surface area of ​​the photocatalyst, thus improving its adsorption performance; in addition, titanium dioxide, graphene oxide, The interaction of sulfonated cobalt phthalocyanine, manganese nitrate and magnesium nitrate achieves the doping of non-metal elements C and N in the catalyst as well as the doping of metal elements Mn and Mg, which greatly reduces the bandgap width of titanium dioxide and broadens the TiO 2 Response range to visible light; inhibits electron-hole recombination, enhances the electron transfer rate, effectively separates electrons and holes, and realizes the photocatalyst's degradation of hexavalent chromium under visible light.

Description

technical field [0001] The present invention relates to a kind of GNs / CoPcS / TiO 2 The invention discloses a method for preparing a photocatalyst, belonging to the technical field of photocatalysts. Background technique [0002] In recent years, with the rapid development of electroplating, metallurgy, tanning, printing and dyeing and chemical industries, the content of heavy metals in water is getting higher and higher. As an important pollutant, chromium is 100 times more toxic than trivalent chromium, and hexavalent chromium is more likely to be absorbed and accumulated by the human body, causing mouth and mouth erosion, nausea, vomiting, diarrhea, diarrhea, etc. Diseases such as pain and ulcers. The most commonly used method to treat Cr(VI) is to add a certain amount of reducing agent to convert Cr(VI) into Cr(III), and then form Cr(OH) under alkaline conditions. 3 However, this method consumes a large amount of reducing agent and is likely to cause secondary pollution...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38C02F1/30
CPCC02F1/30B01J31/38C02F2305/10B01J35/39
Inventor 杨汉培高照朱鸿宇郭润强崔素珍孙慧华聂坤毛静涛尤晓慧张新城杨存满侯抗抗
Owner HOHAI UNIV