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Chemical modified titanium dioxide photocatalyst and preparation method thereof

A technology of titanium dioxide and photocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., to achieve the effect of improving activation performance, simple preparation method, and simple process

Inactive Publication Date: 2016-08-10
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But pure cobalt sulfonated phthalocyanine does not respond to visible light

Method used

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  • Chemical modified titanium dioxide photocatalyst and preparation method thereof
  • Chemical modified titanium dioxide photocatalyst and preparation method thereof
  • Chemical modified titanium dioxide photocatalyst and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0028] A preparation method of a chemically modified titanium dioxide photocatalyst, comprising the steps of:

[0029] Step 1: Add 6 mg of graphene and 300 mg of sulfonated cobalt phthalocyanine to 36 mL of deionized water, centrifuge after ultrasonic reaction for 8 hours and remove the supernatant, and dry to obtain 14.2 mg of graphene-sulfonated cobalt phthalocyanine composite;

[0030] Step 2, slowly drop 17mL of butyl titanate into the mixture of 34ml of ethanol and 4.8mL of acetic acid while stirring, finish dropping in 60 minutes, and mix evenly to obtain solution B;

[0031] Step 3: Add 14.2 mg of graphene-sulfonated cobalt phthalocyanine composite into the mixed solution B while stirring, and stir magnetically for 2 hours to obtain a sol;

[0032] Step 4, put the sol in a 100mL reaction kettle, react at 160°C for 16h, rinse the product with 50mL of hydrochloric acid and deionized water with a concentration of 5% by mass, and then dry it in an oven at 80°C for 8 hours,...

Embodiment 2

[0034] A preparation method of a chemically modified titanium dioxide photocatalyst, comprising the steps of:

[0035] Step 1: Add 6 mg of graphene and 300 mg of sulfonated cobalt phthalocyanine into 36 mL of deionized water, centrifuge after ultrasonic reaction for 10 hours, remove the supernatant, and obtain 14.2 mg of graphene-sulfonated cobalt phthalocyanine composite after drying;

[0036] Step 2, slowly drop 17mL of butyl titanate into the mixture of 34ml of ethanol and 4.8mL of acetic acid while stirring, finish dropping in 60 minutes, and mix evenly to obtain solution B;

[0037] Step 3: Add 14.2 mg of graphene-sulfonated cobalt phthalocyanine composite into the mixed solution B while stirring, and stir magnetically for 2 hours to obtain a sol;

[0038] Step 4, put the sol in a 100mL reactor, react at 200°C for 20h, wash the product with 50mL of hydrochloric acid and deionized water with a concentration of 5% by mass, and then dry it in an oven at 80°C for 8 hours, an...

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Abstract

The invention discloses a chemical modified titanium dioxide photocatalyst. The photocatalyst is prepared by supporting a certain amount of titanium dioxide to graphene and cobalt phthalocyanine sulfonate composition. The chemical modified titanium dioxide photocatalyst can organically combine grapheme, cobalt phthalocyanine sulfonate and titanium dioxide, reduce the energy gap of the titanium dioxide, improve the transfer efficiency of electrons, improve the visible-light response range of the catalyst, and activate oxygen. The modified titanium dioxide photocatalyst has response for the visible-light with the wavelength not less than 460 nm. The chemical modified titanium dioxide photocatalyst can degrade the organic pollutant in water rapidly by means of activating dioxygen in the presence of ultraviolet light and visible light. The preparation method of the chemical modified titanium dioxide photocatalyst has simple process and low cost, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a titanium dioxide photocatalyst, in particular to a chemically modified titanium dioxide photocatalyst, and also relates to a preparation method of the chemically modified titanium dioxide photocatalyst, belonging to the field of photocatalysts. Background technique [0002] In recent years, the field of photocatalysis has developed rapidly, and photocatalytic degradation of organic matter is an important branch of photocatalysis research. Using TiO 2 Photocatalytic degradation of organic dyes is not only high in efficiency, low in cost but also environmentally friendly and reliable. But since TiO 2 The forbidden band width is 3.2ev, and it can only be excited by ultraviolet light with a wavelength less than 380nm; while there are only about 4% of ultraviolet light in sunlight, and it cannot respond to most of the rest of visible light. In addition, when TiO 2 When irradiated by sunlight, the electron-hole pairs excited by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C02F1/30C02F1/72C02F1/74C02F101/38
CPCC02F1/30C02F1/725C02F1/74B01J31/183B01J2531/845C02F2101/38C02F2305/10B01J35/39
Inventor 杨汉培高照傅小飞涂艳梅聂坤崔素珍孙慧华郭润强朱鸿宇
Owner HOHAI UNIV
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