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PVP (polyvinyl pyrrolidone) modified graphene supported BiOCl (bismuth oxychloride) photocatalyst and preparation method thereof

A technology of photocatalyst and graphene, which is applied in the field of photocatalysis to achieve the effect of improving photocatalysis effect, less time consumption and simple preparation process

Inactive Publication Date: 2018-12-25
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Method of the present invention, two-step hydrothermal method prepares polyvinylpyrrolidone (PVP) modified graphene loaded BiOCl compound and has not yet been reported

Method used

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  • PVP (polyvinyl pyrrolidone) modified graphene supported BiOCl (bismuth oxychloride) photocatalyst and preparation method thereof
  • PVP (polyvinyl pyrrolidone) modified graphene supported BiOCl (bismuth oxychloride) photocatalyst and preparation method thereof
  • PVP (polyvinyl pyrrolidone) modified graphene supported BiOCl (bismuth oxychloride) photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of preparation method of PVP modified graphene loaded BiOCl, its flow chart is shown in Figure 6 , including the following steps:

[0040] Step 1: Prepare the solution

[0041] (1) Dissolve 3mmol bismuth nitrate in 20mL ethylene glycol, stir well, and obtain a molar concentration of 0.15mmol / mL in the bismuth nitrate ethylene glycol solution;

[0042] (2) 3mmol potassium chloride and 1mmol citric acid were dissolved in a mixed solution of 7mL ethanol and 14mL water, and stirred evenly to obtain mixture A;

[0043] (3) Bismuth nitrate ethylene glycol solution is mixed with mixture A to obtain a reaction solution;

[0044] Step 2: Preparation of BiOCl

[0045] (1) The reaction solution is placed in a high-pressure reactor, and reacted at 150° C. for 10 h at 4 MPa to obtain a mixture containing BiOCl;

[0046] (2) The mixture containing BiOCl was centrifuged, washed several times with deionized water and absolute ethanol, and dried at 80°C to obtain BiOCl;

[...

Embodiment 2

[0056] A kind of preparation method of PVP modified graphene loaded BiOCl, with embodiment 1, difference is:

[0057] (1) In step 3, 400 mg of BiOCl and 15 mg of polyvinylpyrrolidone were added, and the PVP modified graphene-loaded BiOCl photocatalyst prepared in this example was BRP40.

Embodiment 3

[0059] A kind of preparation method of PVP modified graphene loaded BiOCl, with embodiment 1, difference is:

[0060] (1) In step 3, 600 mg of BiOCl and 15 mg of polyvinylpyrrolidone were added, and the PVP modified graphene-loaded BiOCl photocatalyst prepared in this example was BRP40.

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Abstract

The invention provides a PVP (polyvinyl pyrrolidone) modified graphene supported BiOCl (bismuth oxychloride) photocatalyst and a preparation method thereof and belongs to the field of photocatalyst technology. The preparation method of the PVP modified graphene supported BiOCl photocatalyst includes the steps of mixing solution of conducting high pressure mixing reaction of bismuth nitrate ethylene glycol solution and the mixed solution of potassium chloride and citric acid to obtain BiOCl, mixing BiOCl, polyvinylpyrrolidone and graphene solutions to be placed in a high pressure reactor, reacting for 1-5 hours at the temperature of 140-180 DEG C and under the pressure of 3-4 megapascals, and performing centrifugation, cleaning and drying to obtain the PVP modified graphene supported BiOClphotocatalyst. With polyvinylpyrrolidone as a surfactant to modify the graphene supported BiOCl, the modified graphene supported BiOCl photocatalyst has the advantages of suppressing the recombinationof electron-hole pairs, changing BiOCl polymerization and improving photocatalytic efficiency.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a PVP-modified graphene-loaded BiOCl photocatalyst and a preparation method thereof. Background technique [0002] The highly developed modern industry is based on fossil energy, and a large amount of harmful waste water, waste gas, and waste residue are produced in the process of using these energy sources. Among them, the highly mobile waste water and waste gas pollute the environment particularly seriously. The use of solar photocatalytic oxidation technology for pollutant treatment has become a research hotspot. BiOCl is a new type of myroxide photocatalyst. BiOCl is a new type of layered semiconductor compound, and its crystal structure is tetragonal PbFCl type, which can also be regarded as double X along the C-axis direction. - layer and [Bi 2 o 2 ] 2+ The layered structure composed of alternating layers belongs to the tetragonal crystal system, and...

Claims

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Application Information

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IPC IPC(8): B01J31/26C02F1/30C02F1/72
CPCC02F1/30C02F1/725B01J31/26C02F2305/10B01J35/39
Inventor 秦艳利赵鹏羽杨艳王雨晴孙博惠
Owner SHENYANG LIGONG UNIV