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Preparation method and application of bismuth-titanium-iron oxide chloride photocatalytic material

A technology of photocatalytic materials and oxychlorides, which is applied in the field of photocatalytic material synthesis technology, can solve the problems of wide band gap, high electron-hole recombination rate, and restriction of photocatalytic activity, and achieve small band gap value and hole The effect of low recombination rate and wide response range of visible light

Pending Publication Date: 2020-07-31
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO 2 It is a widely used material at present, but its wide band gap (~3.2 eV) makes it only respond to ultraviolet light (accounting for 5% of sunlight), but not to visible light accounting for 43% of sunlight. High recombination rate, these problems restrict its photocatalytic activity

Method used

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  • Preparation method and application of bismuth-titanium-iron oxide chloride photocatalytic material
  • Preparation method and application of bismuth-titanium-iron oxide chloride photocatalytic material
  • Preparation method and application of bismuth-titanium-iron oxide chloride photocatalytic material

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Embodiment 1

[0029] A preparation method of bismuth titanium iron oxychloride photocatalytic material, comprising the steps of:

[0030] The first step is to prepare bismuth oxychloride nanosheets: Weigh 2 mmol of bismuth nitrate pentahydrate and add it to 20 ml of ethylene glycol, stir with a magnetic stirrer to fully dissolve it, and record it as solution a. The stirring speed of the magnetic stirrer is 10-60 r / min; weigh 2 mmol potassium chloride and dissolve it in 10 ml distilled water, and record it as solution b; add solution b dropwise to solution a at a rate of 1-2 drops per second, and stir magnetically at room temperature for 1 h, stirring at a speed of 10-60 r / min, then centrifugally washing with distilled water at a centrifugal washing speed of 5000-9000rpm, putting the cleaned sample in an oven at 80°C and drying for 12 h to obtain bismuth oxychloride nanosheets;

[0031] The second step is to prepare bismuth titanium iron oxychloride: weigh 3 mmol bismuth oxide, 2 mmol titani...

Embodiment 2

[0034] A preparation method and application of a bismuth titanium iron oxychloride photocatalytic material, comprising the following steps:

[0035] The first step is to prepare bismuth oxychloride nanosheets: Weigh 2 mmol of bismuth nitrate pentahydrate and add it to 20 ml of ethylene glycol, stir with a magnetic stirrer to fully dissolve it, and record it as solution a. The stirring speed of the magnetic stirrer is 10-60 r / min; weigh 2 mmol potassium chloride and dissolve it in 10 ml distilled water, and record it as solution b; add solution b dropwise to solution a at a rate of 1-2 drops per second, and stir magnetically at room temperature for 1 h, stirring at a speed of 10-60 r / min, then centrifugally washing with distilled water at a centrifugal washing speed of 5000-9000rpm, putting the cleaned sample in an oven at 80°C and drying for 12 h to obtain bismuth oxychloride nanosheets;

[0036] The second step is to prepare bismuth titanium iron oxychloride: Weigh 3 mmol bis...

Embodiment 3

[0039] A preparation method and application of a bismuth titanium iron oxychloride photocatalytic material, comprising the following steps:

[0040] The first step is to prepare bismuth oxychloride nanosheets: Weigh 2 mmol of bismuth nitrate pentahydrate and add it to 20 ml of ethylene glycol, stir with a magnetic stirrer to fully dissolve it, and record it as solution a. The stirring speed of the magnetic stirrer is 10-60 r / min; weigh 2 mmol potassium chloride and dissolve it in 10 ml distilled water, and record it as solution b; add solution b dropwise to solution a at a rate of 1-2 drops per second, and stir magnetically at room temperature for 1 h, stirring at a speed of 10-60 r / min, then centrifugally washing with distilled water at a centrifugal washing speed of 5000-9000rpm, putting the cleaned sample in an oven at 80°C and drying for 12 h to obtain bismuth oxychloride nanosheets;

[0041] The second step is to prepare bismuth titanium iron oxychloride: Weigh 3 mmol bis...

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Abstract

The invention discloses a preparation method and application of a bismuth-titanium-iron oxide chloride photocatalytic material, and belongs to the technical field of photocatalytic material preparation processes. The preparation method comprises the following steps: adding bismuth nitrate pentahydrate into an ethylene glycol solution, dropwise adding distilled water containing potassium chloride into an obtained solution at the speed of 1-2 drops per second, stirring for 1 hour at room temperature, then centrifugally washing, and finally putting a cleaned sample into a drying oven for drying to obtain bismuth oxychloride nanosheets; mixing and grinding bismuth oxide, titanium dioxide, ferrous oxide and the bismuth oxychloride nanosheets according to a standard stoichiometric ratio, and calcining in a muffle furnace at 973-1173 K for 12 hours; and after the temperature is reduced to room temperature, taking out the calcined sample, and further grinding. The method has the advantages ofsimple process, easiness in operation, visible light response, low energy consumption and the like; the material has very strong pollutant degradation capacity under visible light, and has wide application prospects in the fields of pollutant treatment, photocatalytic oxygen production and the like.

Description

technical field [0001] The invention belongs to the technical field of synthesis technology of photocatalytic materials, and in particular relates to a preparation method and application of a bismuth titanium iron oxychloride photocatalytic material. Background technique [0002] With the development of human society, problems such as environmental pollution and energy shortage have also been brought. All countries in the world are committed to solving environmental pollution problems and developing new energy sources. The use of semiconductor photocatalysts can degrade organic pollutants; treat wastewater; purify air, etc. Therefore, photocatalytic degradation has become an important method to solve environmental pollution problems, and has the characteristics of low cost and environmental friendliness. TiO 2 It is a widely used material at present, but its wide band gap (~3.2 eV) makes it only respond to ultraviolet light (accounting for 5% of sunlight), but not to visi...

Claims

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Application Information

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IPC IPC(8): B01J27/135C02F1/30C02F101/38
CPCB01J27/135C02F1/30C02F2101/40C02F2305/10B01J35/39Y02W10/37
Inventor 张勤芳韩妮欧贝达·穆罕默德侯海军
Owner YANCHENG INST OF TECH
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