Preparation method of amino-modified Pd/TiO2 photocatalyst

A technology of photocatalyst and amino modification, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low degradation efficiency, achieve improved dispersion, Improve the effect of degradation and improve the photon quantum efficiency

Inactive Publication Date: 2015-02-25
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

However, most of the commercial TiO 2 They are all amorphous particles, and the degradation efficiency in the photocatalytic process is relatively low. Therefore, TiO 2 The shape control of particles plays an important role in improving its photocatalytic activity; in addition, noble metal catalysts based on Pt and Pd nanoparticles have been widely concerned by scholars, and the effective combination of these two types of catalysts, the use of noble metals to support Modified photocatalytic materials, for TiO 2 The improvement of photocatalytic activity is of great significance, and related studies have shown that the size and monodispersity of noble metal particles also play an important role in the improvement of photocatalytic activity.

Method used

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  • Preparation method of amino-modified Pd/TiO2 photocatalyst

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Embodiment 1

[0020] A kind of Pd / TiO with amino modification 2 The preparation method of photocatalyst specifically comprises the steps:

[0021] (1) Synthesis of TiO with {001} high-energy crystal plane 2 Nanosheets

[0022]Put 10ml of tetrabutyl titanate and 0.8ml of hydrofluoric acid aqueous solution with a concentration of 47% by volume in a polytetrafluoroethylene-lined autoclave, and conduct a hydrothermal reaction at 180°C for 24 hours. , 0.1M NaOH and deionized water for 3 times each, then placed in a vacuum drying oven at a controlled temperature of 80°C for 12 hours, then removed and ground, then placed in a muffle furnace for calcination at a controlled temperature of 400°C for 2 hours, and finally passed 200 mesh sieve, that is to get TiO with {001} high-energy crystal plane 2 Nanosheets;

[0023] (2) APTMS modified TiO with {001} high-energy crystal plane 2 Nanosheets

[0024] Add 0.05ml-2ml of APTMS to 100ml of water, then add 150mg of TiO with {001} high-energy crystal...

Embodiment 2

[0035] A kind of Pd / TiO with amino modification 2 Preparation method of photocatalyst, including synthesis of TiO with {001} high-energy crystal faces 2 Nanosheets, APTMS Modification of TiO with {001} High Energy Crystal Plane 2 Nanosheets and Preparation of Pd / TiO 2 Photocatalyst three steps;

[0036] (1) Synthesis of TiO with {001} high-energy crystal plane 2 Nanosheets

[0037] Tetrabutyl titanate and hydrofluoric acid aqueous solution with volume percent concentration of 47% were placed in a polytetrafluoroethylene-lined autoclave, and the volume ratio of tetrabutyl titanate to hydrofluoric acid aqueous solution was 10:0.8, controlled The temperature was 180°C for hydrothermal reaction for 24 hours. After the reaction solution was washed with ethanol, 0.1M NaOH and deionized water in sequence, the obtained sample was vacuum-dried at 80°C, ground after drying, and then put into a muffle furnace for calcination at a controlled temperature of 400°C. 2h, through a 200-me...

Embodiment 3

[0043] A kind of Pd / TiO with amino modification 2 Preparation method of photocatalyst, including synthesis of TiO with {001} high-energy crystal faces 2 Nanosheets, APTMS Modification of TiO with {001} High Energy Crystal Plane 2 Nanosheets and Preparation of Pd / TiO 2 Photocatalyst three steps;

[0044] (1) Synthesis of TiO with {001} high-energy crystal plane 2 Nanosheets

[0045] Tetrabutyl titanate and hydrofluoric acid aqueous solution with volume percent concentration of 47% were placed in a polytetrafluoroethylene-lined autoclave, and the volume ratio of tetrabutyl titanate to hydrofluoric acid aqueous solution was 10:0.8, controlled The temperature was 180°C for hydrothermal reaction for 24 hours. After the reaction solution was washed with ethanol, 0.1M NaOH and deionized water in sequence, the obtained sample was vacuum-dried at 80°C, ground after drying, and then put into a muffle furnace for calcination at a controlled temperature of 400°C. 2h, through a 200-me...

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Abstract

The invention relates to a preparation method of an amino-modified Pd/TiO2 photocatalyst. The preparation method comprises three steps of synthesizing TiO2 nanosheets with high-energy crystal faces [001], modifying the TiO2 nanosheets with thehigh-energy crystal faces [001] by use of APTMS and preparing the Pd/TiO2 photocatalyst. Compared with the prior art, the preparation method of the amino-modified Pd/TiO2 photocatalyst has the advantages that the amino-modification technology is adopted so that the dispersibility of noble metal particles can be greatly improved, and therefore, the degradation effect of the photocatalyst on methylene blue under ultraviolet is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst preparation, in particular to a Pd / TiO with amino modification 2 Preparation method of photocatalyst. Background technique [0002] With the rapid development of the printing and dyeing industry, a large amount of printing and dyeing wastewater is discharged into the environment, causing serious water pollution. Printing and dyeing wastewater contains a large amount of organic pollutants, and the biodegradation of these pollutants is usually very slow, and traditional treatment methods cannot completely treat them. Photocatalytic technology is a green technology with important application prospects in the fields of energy and environment. In recent years, photocatalytic technology has attracted widespread attention in the fields of photocatalytic sterilization, air purification, water splitting to produce hydrogen, and metal corrosion protection. In addition, a large number of studies have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44
Inventor 李巧霞曹晓璐蒋昆王龙龙王亚骏蔡文斌
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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