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Benzimidazolone H3G/TiO2 compound photo-catalyst with visible light response function and preparation method thereof

A benzimidazolone yellow and catalyst technology, which is applied in the field of photocatalytic material preparation, can solve the problems of sensitized catalyst stability and repeated use performance limitations, and achieves good visible light catalytic activity, high chemical and physical stability, and high production cost. low effect

Inactive Publication Date: 2014-03-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stability and reusability of sensitized catalysts are limited due to the dye itself being soluble in water

Method used

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  • Benzimidazolone H3G/TiO2 compound photo-catalyst with visible light response function and preparation method thereof
  • Benzimidazolone H3G/TiO2 compound photo-catalyst with visible light response function and preparation method thereof
  • Benzimidazolone H3G/TiO2 compound photo-catalyst with visible light response function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Composite Photocatalyst Benzimidazolone Yellow H3G / TiO 2 The common hydrothermal method is used for the preparation: in a glass container, add N,N-dimethylformamide 35g, benzimidazolone yellow H3G 0.8g, TiO 2 4g, Span 80 0.05g, stirred at room temperature for 30min. This mixture was added into a closed autoclave with a polytetrafluoroethylene liner, and loaded by adsorption at 195°C for 4h. After the reaction was completed, it was cooled to room temperature and centrifuged to obtain a light yellow solid, which was washed with ethanol and water respectively, and dried by filtration. The obtained light yellow solid was placed in a vacuum drying oven and dried at 100°C for 0.5h to obtain benzimidazolone yellow H3G / TiO 2 Composite photocatalytic materials. Abbreviated as BYH3G / TiO 2 .

[0029] figure 1 It is the composite photocatalytic material BYH3G / TiO of the present invention 2 with pure TiO 2 The UV-Vis diffuse reflectance spectrum comparison chart, the result...

Embodiment 2

[0033] Benzimidazolone Yellow H3G / TiO 2 Preparation: In a glass container, add N,N-dimethylformamide 24g, benzimidazolone yellow H3G 0.2g, TiO 2 4g, Span 80 0.08g, stirred at room temperature for 30min. This mixture was added into a closed autoclave with a polytetrafluoroethylene liner, and loaded by adsorption at 180°C for 6h. After the reaction was completed, it was cooled to room temperature and centrifuged to obtain a light yellow solid, which was washed with ethanol and water respectively, and dried by filtration. The obtained light yellow solid was placed in a vacuum drying oven and dried at 100°C for 0.5h to obtain benzimidazolone yellow H3G / TiO 2 Composite photocatalytic materials.

[0034] The photocatalyst is used for visible light catalytic degradation dye rhodamine B, visible light catalytic degradation conditions: irradiate with visible light (150W iodine tungsten lamp light source, 420nm filter to filter out ultraviolet light), rhodamine B aqueous solution 10...

Embodiment 3

[0036] Benzimidazolone Yellow H3G / TiO 2 Preparation: In a glass container, add N,N-dimethylformamide 48g, benzimidazolone yellow H3G 0.5g, TiO 2 4g, Span 80 0.012g, stirred at room temperature for 30min. This mixture was added into a closed autoclave with a polytetrafluoroethylene liner, and loaded by adsorption at 210°C for 2h. After the reaction was completed, it was cooled to room temperature, centrifuged and filtered to obtain a light yellow solid, which was washed with ethanol and water respectively, and dried by filtration. The obtained light yellow solid was placed in a vacuum drying oven and dried at 100°C for 0.5h to obtain benzimidazolone yellow H3G / TiO 2 Composite photocatalytic materials.

[0037] The photocatalyst is used for visible light catalytic degradation dye rhodamine B, visible light catalytic degradation conditions: irradiate with visible light (150W iodine tungsten lamp light source, 420nm filter to filter out ultraviolet light), rhodamine B aqueous ...

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Abstract

The invention relates to a benzimidazolone H3G / TiO2 compound photo-catalyst with a visible light response function and a preparation method thereof. A visible light absorbing area of the catalyst is 400-600nm. The preparation method comprises the following steps of: adding organic pigment benzimidazolone H3G, TiO2, an accelerator span 80, and N,N-dimethylformamide into an airtight high-pressure kettle; heating and increasing temperature; keeping temperature constant at 180-210 DEG C; after ending loading, cooling to room temperature; filtering, thereby obtaining a light yellow solid; respectively washing the solid with alcohol and water; and placing the obtained light yellow solid into a vacuum drying oven and drying at 100-150 DEG C, and then obtaining a benzimidazolone H3G / TiO2 compound photo-catalytic material. The method for preparing the benzimidazolone H3G / TiO2 photo-catalyst is called as a water thermal loading method in the invention for short. The catalyst provided by the invention has excellent visible light catalytic activity; the degradation speed of pollutant substance is higher than that of TiO2; the chemical and physical stabilities of the prepared catalyst are higher; after the catalyst is used, the catalyst is filtered, washed with distilled water and vacuum-dried for 0.5-1 hour at 100-150 DEG C, and then the catalyst is reusable; and after the catalyst is used for four times, the catalytic activity is not obviously reduced.

Description

technical field [0001] The technology of the present invention belongs to the field of preparation of photocatalytic materials, and in particular proposes an organic pigment / TiO2 that responds to visible light 2 Preparation method of composite photocatalyst, benzimidazolone yellow H3G / TiO 2 Composite photocatalyst and preparation method thereof. Background technique [0002] In recent years, nano-TiO 2 The heterogeneous photocatalytic technology as a catalyst has been paid more and more attention to the problem of organic pollution in the environmental field. Nano-TiO 2 The efficiency of photocatalytic oxidation degradation of organic matter is high, it can be carried out at normal temperature and pressure, and the energy consumption is low, the reaction conditions are mild, the reaction speed is fast, the degradation is generally not selective, and the final product of the reaction is CO 2 、H 2 O and harmless salts will not cause secondary pollution, and it is a clean ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38
Inventor 张天永商希礼李彬王晓孟明
Owner TIANJIN UNIV
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