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Organic anthraquinone dye sensitized and precious metal supported inorganic semiconductor visible-light photocatalyst, and preparation method and application of photocatalyst

An inorganic semiconductor, anthraquinone dye technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as deactivation, and achieve good absorption of visible light performance. Effect

Active Publication Date: 2013-04-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these pure organic dyes that are often used at present, such as Eosin Y, Coumarin343, have the defect of being inactivated due to excessive oxidation or reduction in the process of photosensitized hydrogen production

Method used

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  • Organic anthraquinone dye sensitized and precious metal supported inorganic semiconductor visible-light photocatalyst, and preparation method and application of photocatalyst
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  • Organic anthraquinone dye sensitized and precious metal supported inorganic semiconductor visible-light photocatalyst, and preparation method and application of photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1). Put 2g of P25 TiO with a particle size of 25 nanometers 2 The carrier is dispersed in 150ml deionized water, and then 3~5.5ml of chloroplatinic acid aqueous solution with a concentration of 0.376g / 100ml (calculated based on the mass of pure platinum metal element, that is, 100ml of chloroplatinic acid aqueous solution contains 0.376g of platinum element) 1.3~2.4ml of propanol, ultrasonic and fully stirred, place in a quartz bottle to obtain a mixed suspension; after the quartz bottle is capped, Ar gas is blown into the quartz bottle to remove oxygen, and then the mixed suspension is irradiated with UV light of a 300W Xe lamp The reaction was stirred for about 12 hours, the product obtained after the reaction was centrifuged, and the solid product obtained after the centrifugal separation was repeatedly washed with deionized water, and dried in a vacuum drying box to fully remove the water, and P25 loaded with platinum nanoparticles was obtained. TiO 2 Carrier

[0041]...

Embodiment 2

[0054] In this example, by changing the concentration of the dye solution during in-situ adsorption and sensitization of alizarin red dye, the change of the concentration of the sensitizer was studied in the hydrogen production experiment, the hydrogen production rate and the conversion number of the alizarin red sensitizer ( TON) varies with the concentration of the dye solution.

[0055] Prepare different concentrations of Alizarin Red dye solutions according to the method in Example 1, so that the P25 type TiO loaded with platinum nanoparticles 2 The surface of the carrier adsorbs and sensitizes the Alizarin Red dye in situ; only the organic anthraquinone dye solution in the step (2) of preparing the visible light photocatalyst is replaced with a concentration of 2.5×10 -6 mol / L、3.75×10 -6 mol / L、5×10 -6 mol / L、7.5×10 -6 mol / L、10×10 -6 mol / L and 15×10 -6 mol / L Alizarin Red Dye Solution, Alizarin Red Dye-sensitized P25-type TiO loaded with platinum nanoparticles was prepared from t...

Embodiment 3

[0059] Prepare the Alizarin Red Dye Solution and Alizarin Dye Solution according to the method in Example 1, so that the P25 type TiO loaded with platinum nanoparticles 2 The surface of the carrier adsorbs and sensitizes Alizarin Red dye and Alizarin dye respectively in situ; among them, only the organic anthraquinone dye solution in step (2) of preparing visible light photocatalyst is replaced with a concentration of 2.5×10 -6 mol / L Alizarin Red Dye Solution and Alizarin Dye Solution, from the above concentration are 2.5×10 -6 Alizarin red dye solution sensitizer and alizarin dye solution sensitizer were prepared with mol / L Alizarin Red dye and Alizarin dye sensitized P25-type TiO with platinum nanoparticles 2 Visible light photocatalyst, in which the supported platinum nanoparticles account for P25 TiO 2 The total mass fraction of the carrier and the platinum nanoparticles is about 0.8%, and the amount of alizarin red dye and alizarin dye adsorbed and sensitized in situ is relati...

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Abstract

The invention relates to an organic anthraquinone dye sensitized and precious metal supported inorganic semiconductor visible-light photocatalyst, and a preparation method and an application of the photocatalyst. According to the inorganic semiconductor visible-light photocatalyst, precious metal nanometer particles are supported on the surface of an inorganic semiconductor supporter, and organic anthraquinone dyes are adsorbed and sensitized on the surface of the inorganic semiconductor supporter supported with the precious metal nanometer particles in situ, wherein the mass of the supported precious metal nanometer particles accounts for 0.5%-2.5% of the total mass of the inorganic semiconductor supporter and the precious metal nanometer particles; and the content of the in-situ adsorbed and sensitized organic anthraquinone dyes is 1-35mol / g relative to a molar mass fraction of the inorganic semiconductor supporter. The inorganic semiconductor visible-light photocatalyst can be excited in a visible-light region, and can catalyze and decompose water into hydrogen after an organic matter, namely a sacrificial agent is added. The organic anthraquinone dye sensitized and precious metal supported inorganic semiconductor visible-light photocatalyst can be used for production of clean hydrogen energy.

Description

Technical field [0001] The invention belongs to the field of visible light photocatalysts for photocatalytic decomposition of water to produce hydrogen, and in particular relates to a cheap and stable organic anthraquinone dye-sensitized inorganic semiconductor visible light photocatalyst supporting precious metals, and a preparation method of the inorganic semiconductor visible light photocatalyst, and the use of the inorganic semiconductor Visible light photocatalysts are used for photocatalytic decomposition of water to produce clean energy hydrogen. Background technique [0002] In 1972, Fujishima and Honda of Japan used a common inorganic semiconductor titanium dioxide to successfully decompose water into hydrogen and oxygen under the synergistic effect of ultraviolet light irradiation and electric field. Since then, various inorganic semiconductor catalysts have been developed, such as ZrO 2 , SrTiO 3 , Ta 2 O 5 , Sr 2 M 2 O 7 (M=Nb or Ta) and ATaO 3 (A=Li, Na or K). But u...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J31/36C01B3/04
CPCY02E60/36
Inventor 赵进才李骎籍宏伟陈春城马万红
Owner INST OF CHEM CHINESE ACAD OF SCI
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