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A kind of preparation method of AgCl/biocl photocatalyst of tubular AgCl structure

A photocatalyst, tubular technology, applied in physical/chemical process catalysts, chemical instruments and methods, other chemical processes, etc., can solve problems such as low absorption, achieve good degradation performance, good application prospects, and scientific preparation methods.

Active Publication Date: 2020-10-16
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the absorption of Bi-O-Cl photocatalysts in the visible light range is not high, so it needs to be modified

Method used

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  • A kind of preparation method of AgCl/biocl photocatalyst of tubular AgCl structure
  • A kind of preparation method of AgCl/biocl photocatalyst of tubular AgCl structure
  • A kind of preparation method of AgCl/biocl photocatalyst of tubular AgCl structure

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Experimental program
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Effect test

Embodiment 1

[0028] The preparation method of the AgCl / BiOCl photocatalyst of tubular AgCl structure that this embodiment involves comprises the following steps:

[0029] (1) Preparation of BiOCl

[0030] ① Add 0.01-0.05mol bismuth oxide (Bi 2 o 3 ) was added dropwise 5-30mL hydrochloric acid (HCl), stirred evenly the above two mixtures were completely dissolved to form a transparent solution, and then ammonia water (NHCl) was added dropwise to the above transparent solution 3 ·H 2 O) to adjust the pH value to 5-10, so that a white precipitate appears in the transparent solution to form a suspension;

[0031] ② Place the suspension at 30-60°C under temperature control and continue magnetic stirring for 20-60 minutes to form a white colloid, and use deionized water and absolute ethanol (C 2 h 5 OH) After centrifuging and washing the above-mentioned white colloid for three times, drying the white colloid at a temperature of 40-80°C for 24 hours, collecting and obtaining a white powder o...

Embodiment 2

[0050] In this embodiment, the AgCl / BiOCl photocatalyst of loading different proportions of AgCl prepared in Example 1 is tested for ultraviolet-visible diffuse reflectance (DRS), and the test results are as follows: Image 6 Shown: In the range of 360-800nm, the light absorption ability of AgCl / BiOCl loaded with 2% AgCl, AgCl / BiOCl loaded with 5% AgCl and AgCl / BiOCl loaded with 10% AgCl is higher than that of pure BiOCl. The AgCl / BiOCl photocatalyst prepared in Example 1 has strong visible light responsiveness in the visible light range (390-760nm).

Embodiment 3

[0052] In this embodiment, methyl orange is used as the target pollutant, and the photodegradability of the prepared AgCl / BiOCl photocatalyst is experimentally studied by using a visible light source. It is confirmed that the AgCl / BiOCl photocatalyst loaded with 2% AgCl, 5% AgCl and 10% AgCl respectively developed in Example 1 has a good degradation effect on methyl orange, and the AgCl / BiOCl loaded with 5% AgCl Photocatalysts have the best performance in degrading the pollutant methyl orange (such as Figure 7 Shown), for the methyl orange solution that mass concentration is 80mg / L, the degradation rate of methyl orange can reach 91% after 60 minutes, and the degradation rate of pure BiOCl is only 15% under the same condition.

[0053] In this embodiment, methyl orange (MO) is used as the degradation product, and the specific degradation experiments are as follows:

[0054] Prepare the MO aqueous solution with an initial mass concentration of 80 mg / L, and then add AgCl / BiOCl...

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Abstract

The invention belongs to the field of photocatalyst preparation technology and relates to a method for preparing an AgCl / BiOCl photocatalyst with a tubular AgCl structure. A new AgCl / BiOCl photocatalyst loaded with a nanotubular AgCl structure is prepared for the first time by using a hydrothermal method. The specific preparation method is Using bismuth oxide, hydrochloric acid, silver nitrate and ethanol as raw materials, the precursor BiOCl is first prepared, then a chlorine source (manganese chloride, ferric chloride, etc.) and silver source are added, and a new structure of AgCl-BiOCl composite light is prepared by hydrothermal method Catalyst; the enhanced phase AgCl in the prepared AgCl / BiOCl photocatalyst has a tubular morphological structure, and the tubular AgCl is closely connected to the matrix BiOCl lamellae; the preparation method is scientific, the preparation process is simple, the preparation cost is low, and the prepared product has a unique structure. It has excellent performance and good application prospects.

Description

Technical field: [0001] The invention belongs to the technical field of photocatalyst preparation, and relates to a method for preparing a AgCl / BiOCl photocatalyst with a novel morphology. In the AgCl / BiOCl photocatalyst prepared by the method, the reinforcing phase AgCl has a tubular morphology and is laminated with the matrix BiOCl layer Closely connected, the tubular AgCl in this structure can enhance the photodegradation performance of AgCl / BiOCl photocatalyst to methyl orange (MethylOrange:MO). Background technique: [0002] Photocatalysis is currently one of the most popular technologies in the field of environmental governance, and it plays an excellent role in environmental pollution control. Compared with other pollution control technologies, semiconductor photocatalysis technology has the advantages of various types of degradable organic pollutants, high degradation rate, and stable properties, and because it uses sunlight as a light source, it is more energy-savin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/10B01J20/02C02F1/30C02F101/30
CPCB01J20/0233B01J20/027B01J20/0288C02F1/30B01J27/10C02F2101/308B01J2220/42B01J2220/4806B01J35/39
Inventor 李成栋鲁曼曼赵梅周伟郭智鹏吕蕾
Owner QINGDAO UNIV OF SCI & TECH
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