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Subphthalocyanine/titanium dioxide nano photocatalyst and preparation method and application thereof

A nano-photocatalyst and titanium dioxide technology, applied in the field of photocatalysis, can solve the problems of organic pollutants that have not been seen, and achieve the effects of pollution-free and recyclable raw materials, simple preparation methods, and less raw materials

Inactive Publication Date: 2018-08-07
NORTHWEST UNIV
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Problems solved by technology

[0004] At present, researchers have improved TiO2 by ion doping, noble metal deposition, photosensitization, and semiconductor recombination. 2 The photocatalytic performance of the composite, but has not yet seen the use of subphthalocyanine sensitized TiO 2 Research Report on Photocatalytic Degradation of Organic Pollutants

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  • Subphthalocyanine/titanium dioxide nano photocatalyst and preparation method and application thereof
  • Subphthalocyanine/titanium dioxide nano photocatalyst and preparation method and application thereof
  • Subphthalocyanine/titanium dioxide nano photocatalyst and preparation method and application thereof

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preparation example Construction

[0046] The preparation method of above-mentioned subphthalocyanine / titanium dioxide nano photocatalyst comprises the following steps:

[0047] S1. Take 67mL of absolute ethanol and place it in a 100mL beaker, slowly add 17mL of n-butyl titanate dropwise into it while stirring, and then add 6mL of triethanolamine to inhibit the rapid hydrolysis of n-butyl titanate. After the mixture was stirred for 50 min, anhydrous ethanol: deionized water = 10:1 (volume ratio) mixture was added dropwise, and the reaction system was stirred for 3 h to completely hydrolyze n-butyl titanate to obtain a uniform and clear orange-yellow sol. The sol was aged and placed in a muffle furnace, and calcined at 450° C. for 5 hours to obtain titanium dioxide particles. Finally, the obtained titanium dioxide particles are ground into powder to obtain nano-TiO 2 White powder.

[0048] S2. The whole reaction needs to be carried out under strict anhydrous and oxygen-free conditions. The reaction route is as...

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Abstract

The invention discloses a subphthalocyanine / titanium dioxide nano photocatalyst and a preparation method and application thereof. The nano photocatalyst is synthesized by taking titanium dioxide as abody, adding little subphthalocyanine as a photosensitizer and utilizing a chemical modification method, and is used for improving photocatalytic performance of TiO2 under visible light. The preparation method includes: preparing titanium dioxide through a sol-gel method; preparing subphthalocyanine and the subphthalocyanine / titanium dioxide nano photocatalyst through a solvothermal method. The nano photocatalyst organically combines subphthalocyanine with titanium dioxide, visible light response range of a titanium dioxide catalyst is expanded, the titanium dioxide photocatalyst after being modified has good degradation effect on water solutions of acidic and alkaline organic dye under the visible light with wavelength greater than 400 nm, and degradation rates for acid fuchsin and bromophenol blue can reach 97% and 99% respectively. The nano photocatalyst has the advantages that the preparation method is simple, needed raw materials are few, and the photocatalyst is free of pollution, recyclable, low in cost and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a subphthalocyanine / titanium dioxide nanometer photocatalyst and a preparation method and application thereof. Background technique [0002] With the rapid development of the economy, the problem of water pollution is becoming more and more serious, and the refractory organic pollutants discharged into the water pose great harm to the environment and human health. Titanium dioxide (TiO2) was first discovered by Fujishima and Honda in 1972 2 ) has the function of decomposing water under ultraviolet light irradiation, and this kind of material has become a clean and efficient photocatalytic material with great potential application value due to its stable physical and chemical properties, easy modification, low toxicity, and low cost. However, due to TiO 2 The bandgap bandgap is about 3.2eV, and electron-hole pairs can only be generated when excited by ultravio...

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Application Information

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IPC IPC(8): B01J31/38C02F1/30C02F1/72C02F101/30
CPCC02F1/30C02F1/725B01J31/183B01J31/38C02F2305/10C02F2101/308B01J35/39
Inventor 李卓崔国意马晓迅樊安焦林郁
Owner NORTHWEST UNIV
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