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Visible-light-driven photocatalyst Ag-AgCl-BiOCl and preparation method and application thereof

A catalyst and visible light technology, applied in chemical instruments and methods, light water/sewage treatment, textile industry wastewater treatment, etc., to achieve the effect of improving utilization rate and catalytic activity

Inactive Publication Date: 2016-01-20
FUDAN UNIV
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Problems solved by technology

At present, there are few studies on noble metal modification and doping modification of BiOX, and the introduction of metallic silver can enhance the absorption of the catalyst in the visible light range.

Method used

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  • Visible-light-driven photocatalyst Ag-AgCl-BiOCl and preparation method and application thereof
  • Visible-light-driven photocatalyst Ag-AgCl-BiOCl and preparation method and application thereof
  • Visible-light-driven photocatalyst Ag-AgCl-BiOCl and preparation method and application thereof

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Embodiment Construction

[0024] 1. Preparation of Ag-AgCl-BiOCl composite photocatalyst by mixed solvent coprecipitation method

[0025] BiOCl preparation: 12mmolBi(NO 3 ) 3 ?5H 2 O solid was added to 24-25 ml of ethylene glycol (EG, ethyleneglycol) solution, and then heated at 70-80° C. and magnetically stirred for 20-30 minutes to form a transparent solution A. Dissolve a certain quality of KCl in 96-100 ml of water (H 2 O), so that the number of moles of KCl is equal to that of Bi(NO 3 ) 3 ?5H 2 moles of O to obtain solution B. The volume ratio of ethylene glycol and water in solutions A and B keeps EG:H 2 O=1 / 4. Add solution B to solution A dropwise, then adjust the pH of the mixture to 6-7 with ammonia water, and magnetically stir at 60-70° C. for 60-70 minutes. The precipitate was separated by centrifugation, washed 2-3 times with deionized water and ethanol respectively, and dried at 60-65° C. to obtain a BiOCl solid.

[0026] preparation: With the preparation method of above-me...

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Abstract

The invention belongs to the technical fields of water pollution treatment and photocatalytic materials, and particularly relates to a visible-light-driven photocatalyst Ag-AgCl-BiOCl and a preparation method and application thereof. The visible-light-driven photocatalyst is a composite photocatalyst which is obtained from AgCl and BiOCl through a coprecipitation method and denoted as Ag-AgCl-BiOCl. The preparation method comprises the steps that ethanediol and water are taken as solvent, the BiOCl-AgCl are subjected to coprecipitation in the solvent, precipitation is irradiated through a xenon lamp, part AgCl is resolved into Ag, and the Ag-AgCl-BiOCl composite photocatalyst is finally formed. The composite photocatalyst effectively increases absorption of the BiOCl within a visible light range, a larger specific surface area and the higher electron-hole separation efficiency are showed, and compared with pure BiOCl and AgCl, better adsorbability and photocatalytic activity are achieved. The visible-light-driven photocatalyst Ag-AgCl-BiOCl can be widely used for dye and pharmaceutical wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of water pollution treatment and photocatalytic materials, and in particular relates to a visible light catalyst mainly used in the fields of water pollution control and environmental restoration, its preparation method and application. Background technique [0002] In the field of photocatalysis, TiO 2 It has been widely studied, and in recent years, researchers have developed new photocatalysts, mainly focusing on some layered compounds and structural compounds. A representative Bi-based compound is characterized by a special layered structure and an appropriate band gap, which can absorb and respond to visible light well. Bismuth-based photocatalysts (Bi 2 o 3 , BiOX-Cl, Br, I) due to its unique electronic structure and energy band structure, it shows better catalytic degradation performance than other types of semiconductors in the photocatalytic degradation of organic dyes under sunlight. The most t...

Claims

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Application Information

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IPC IPC(8): B01J27/06C02F1/30C02F101/38C02F101/34C02F103/30C02F103/36
CPCY02W10/37
Inventor 王晓宁蔡佳楠毕文龙翟萍萍董文博
Owner FUDAN UNIV
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