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Photocatalyst responding to visible light, and preparation method and application

A photocatalyst and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of high production cost, complex production process and low photocatalytic efficiency and other problems, to achieve the effect of low cost and simple manufacturing process

Active Publication Date: 2005-03-30
INST OF CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although these methods can utilize titanium dioxide under the irradiation of visible light, they generally have the problems of introducing impurity ions into the system, the catalyst is easily corroded by light, and the photocatalytic efficiency is low.
In recent years, international attention has been paid to non-metallic bulk-doped modified semiconductor catalysts. Representative documents include the article "Nitrogen-doped TiO Visible Light Photocatalysis" (R .Asahi, T.Morikawa, T.Ohwaki, K.Aoki, T.Taga, Visible-light photocatalysis in nitrogen-doped titanium oxides, Science), in N 2 Nitrogen-doped titania catalysts were prepared by using ion-sputtered titania targets in Ar atmosphere, but these methods have the problems of complex manufacturing process and high manufacturing cost

Method used

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  • Photocatalyst responding to visible light, and preparation method and application
  • Photocatalyst responding to visible light, and preparation method and application
  • Photocatalyst responding to visible light, and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 50 mg of copper sulfate (0.01 mol / liter) and 50 mg of boric acid (0.027 mol / liter) to 30 ml of anhydrous methanol solution to dissolve completely. Use a syringe to slowly add 10ml of titanium salt solution (0.29 mol) into the stock solution dropwise under vigorous stirring for about 20 minutes, and continue stirring for 2 hours after the addition is complete. A 5 mol / L nitric acid solution was added to the reaction solution at a rate of 0.1 ml every 10 minutes, and a sol was obtained after 12 hours, and left to age for 7 days. The solid precipitate obtained by volatilizing the sol solvent was dried at 100°C to obtain the photocatalyst.

Embodiment 2

[0035] Add 50 mg of nickel sulfate (0.01 mol / liter) and 50 mg of boric acid (0.024 mol / liter) to 30 ml of anhydrous methanol solution, and dissolve completely. Use a syringe to slowly add 10ml of titanium salt solution (0.29 moles) into the stock solution in about 20 minutes under vigorous stirring, and continue to stir for 2 hours after the addition is complete. A 5 mol / L nitric acid solution was added to the reaction solution at a rate of 0.1 ml every 10 minutes, and a sol was obtained after 12 hours, and left to age for 7 days. The solid precipitate obtained by volatilizing the sol solvent was dried at 120°C, heated to 700°C in a muffle furnace and maintained for 5 hours, and the photocatalyst was obtained after cooling.

Embodiment 3

[0037] Add 50mg indium trichloride tetrahydrate (5.6×10 -3 mol / L) and 50mg ammonium chloride (3×10 -2 mol / L), completely dissolved. Use a syringe to slowly add 10ml of titanium salt solution (0.29 mol) into the stock solution dropwise under vigorous stirring for about 20 minutes, and continue stirring for 2 hours after the addition is complete. A 5 mol / L nitric acid solution was added to the reaction solution at a rate of 0.1 ml every 10 minutes, and a sol was obtained after 12 hours, and left to age for 7 days. The solid precipitate obtained by volatilizing the sol solvent was dried at 120°C, heated to 700°C in a muffle furnace and maintained for 5 hours, and the photocatalyst was obtained after cooling.

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Abstract

A semiconductor photocatalyst responsive to visual light is composed of the particles of metallic oxide chosen from iron oxide, nickel oxide, cabolt oide, copper oxide, etc, the non-metal element chosen from N, C, S, B and P and semiconductor nanoparticles chosen frmo TiO2, SnO2, ZnO, CdS and WO3.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a photocatalyst with visible light response. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The invention also relates to the use of the catalysts described above. Background technique [0004] As we all know, with the development of industry, the problem of environmental pollution has become very serious. In my country, nearly half of the rivers are polluted, 164 million people drink water with serious organic pollution, and indoor and outdoor air pollution is serious. Among them, the proportion of refractory toxic organic pollutants is also increasing sharply, and many toxic organic pollutants cannot be treated with existing microbial technology, or cannot be completely removed. [0005] In recent years, nano-semiconductor photocatalytic technology has made great progress, many nano-semiconductor materials, such as titanium diox...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J23/00B01J27/00C02F1/30
Inventor 赵进才赵伟马万红
Owner INST OF CHEM CHINESE ACAD OF SCI
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