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Aqueous-phase dispersed photocatalyst as well as preparation method and application thereof

A photocatalyst and dispersive technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, water pollutants, etc., can solve the problems that water-phase dispersed BiOCl photocatalyst has not been reported, and can improve the electrostatic repulsion energy. , the effect of reducing van der Waals gravitational force and high photocatalytic performance

Active Publication Date: 2014-12-24
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the research on BiOCl photocatalysts is mainly focused on the development of powders and the development of immobilization technology, but there is no report on the water-phase dispersed BiOCl photocatalysts.

Method used

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  • Aqueous-phase dispersed photocatalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0024] 1) Weigh analytically pure BiCl with 0.16 mmol of bismuth-containing elements 3 , into a beaker filled with 5 mL of distilled water, and dissolved under magnetic stirring at room temperature for 1.5 h to form solution A-1;

[0025] 2) Take 10 mL of 27% ammonia solution and record it as solution B;

[0026] 3) Add solution B-1 dropwise to solution A-1 gradually, keep the drop rate at 1.5 mL / min, adjust the pH value to 8, and stir thoroughly for 3 hours to obtain a suspended catalyst system, which is referred to as suspension C-1 ;

[0027] 4) Weigh 0.003 mmol of sodium hexametaphosphate, add it to the above-mentioned suspension catalyst system, and then thoroughly mix and oscillate with ultrasonic waves for 1 h to obtain a water-phase dispersed BiOCl photocatalyst, which is recorded as the suspension BiOCl-1.

[0028] The aqueous phase dispersion type catalyst BiOCl-1 of above gained is through centrifugation, after washing, after drying, we have carried out X-ray diff...

Embodiment 2

[0030] 1) Weigh analytically pure BiCl with 0.32 mmol of bismuth-containing elements 3 , into a beaker filled with 10 mL of distilled water, and dissolved under magnetic stirring at room temperature for 2 h to form solution A-2;

[0031] 2) Take 15 mL of 27% ammonia solution and record it as solution B-2;

[0032] 3) Add solution B-2 dropwise to solution A-2 gradually, keep the dropping rate at 1.5 mL / min, adjust the pH value to 9, and stir thoroughly for 4 hours to obtain the suspension catalyst system, which is recorded as suspension C- 2;

[0033] 4) Weigh 0.006 mmol of sodium hexametaphosphate, add it to the above-mentioned suspension catalyst system, and then thoroughly mix and oscillate with ultrasonic waves for 1.5 h to obtain a water-phase dispersed BiOCl photocatalyst, which is designated as BiOCl-2.

[0034] The water phase dispersion type catalyst BiOCl-2 of above gained is through centrifugation, washing, after drying, we have carried out X-ray diffraction charac...

Embodiment 3

[0036] 1) Weigh analytically pure BiCl with 0.63 mmol of bismuth-containing elements 3 , into a beaker filled with 20 mL of distilled water, and magnetically stirred at room temperature to dissolve for 2 h to form solution A-3;

[0037] 2) Take 20 mL of 27% ammonia solution and record it as solution B-3;

[0038]3) Gradually add solution B-3 to solution A-3, keep the dropping rate at 1.5 mL / min, adjust the pH value to 9, and stir thoroughly for 2 hours to obtain the suspension catalyst system, which is recorded as suspension C-3 ;

[0039] 4) Weigh 0.01 mmol of sodium hexametaphosphate, add it to the above-mentioned suspension catalyst system, and then thoroughly mix and oscillate with ultrasonic waves for 2 h to obtain a water-phase dispersed BiOCl photocatalyst, which is designated as BiOCl-3.

[0040] The aqueous phase dispersion type catalyst BiOCl-3 obtained above is through centrifugation, washing, after drying, we have carried out X-ray diffraction characterization to...

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Abstract

The invention discloses an aqueous-phase dispersed BiOCl photocatalyst. BiCl3 is taken as a bismuth source, water is taken as a solvent, ammonia water is taken as a pH modifier, sodium hexametaphosphate is taken as a dispersing agent, and the aqueous-phase dispersed BiOCl photocatalyst is prepared with a hydrolysis method which is simple, easy to implement, economical and environment-friendly. The invention further discloses a preparation method and an application of the aqueous-phase dispersed BiOCl photocatalyst. The preparation method is simple, easy to implement, low in temperature and environment-friendly, the industrial cost and the energy consumption are reduced, and the obtained aqueous-phase dispersed BiOCl photocatalyst has the excellent photocatalytic performance; above all, the photocatalyst is good in dispersibility and stability; besides, the photocatalyst is applied to treatment of liquid-phase and oily pollutants and shows the approximately homogenous catalysis characteristic, the photocatalytic performance of the photocatalyst is improved, the defect that powder catalysts are difficult in solid-liquid separation during recycling is overcome, and problems of complex procedures and activity reduction caused by film catalysts during recycling are solved.

Description

technical field [0001] The invention relates to a water-phase dispersed photocatalyst, in particular to a water-phase dispersed BiOCl photocatalyst, its preparation method and its application in treating organic pollutants, belonging to the technical field of inorganic synthetic photocatalysts. Background technique [0002] In recent years, with the rapid development of the dye industry and catering industry, the problems of dye wastewater pollution and waste oil discharge have intensified. Among them, dyes are difficult to be oxidized by common oxidants or degraded by microorganisms, causing serious water, soil and ecological environment pollution; waste oils and fats are difficult to process because of the harsh conditions for the decarboxylation and transesterification of macromolecular triglycerides. Therefore, finding a fast, economical and effective solution to the decarboxylation of dye wastewater and triglycerides is a key issue to achieve sustainable development and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/10B01J35/12C02F1/30C02F101/38B01J35/27
CPCY02W10/37
Inventor 张小超李瑞张继龙易群樊彩梅
Owner TAIYUAN UNIV OF TECH
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