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Synthesis of novel compound photocatalyst Bi2S3/BiOCl as well as application of photocatalyst

A composite catalyst and catalyst technology, applied in the field of photocatalysis, can solve the problems of high cost, unfriendly environment, and unsatisfactory results.

Inactive Publication Date: 2015-04-29
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no satisfactory results were obtained
[0005] For example, Chinese patent 201110344121.4 discloses a bismuth sulfide nanoparticle / bismuth oxychloride composite photocatalytic material and its preparation method. Bismuth nitrate and 1-dodecyl-3-methylimidazole chloride are respectively dissolved in ethylene glycol methyl Then solvothermal reaction in ether to make bismuth oxychloride microspheres, and then add bismuth oxychloride microspheres to the aqueous solution containing sulfur source for partial ion exchange to prepare a composite photocatalytic material containing bismuth sulfide nanoparticles and bismuth oxychloride. The composite photocatalytic material in the patent uses bismuth sulfide nanoparticles as a part of the composite, and the composite photocatalyst is prepared by ion exchange, and ethylene glycol methyl ether is used as a solvent, which is not only costly but also environmentally unfriendly

Method used

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  • Synthesis of novel compound photocatalyst Bi2S3/BiOCl as well as application of photocatalyst
  • Synthesis of novel compound photocatalyst Bi2S3/BiOCl as well as application of photocatalyst
  • Synthesis of novel compound photocatalyst Bi2S3/BiOCl as well as application of photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] 7.0g of Bi(NO 3 ) 3 ·5H 2 O and 0.27g thiourea were placed in 20 ml of 0.10mol / LHNO 3 solution, the above mixture was stirred and subjected to ultrasonic treatment,

[0085] Use a certain concentration of sodium hydroxide solution to adjust the pH of the solution to 7.0, then add 0.15g KCl and 30mL ethylene glycol;

[0086] Transfer the mixture to a polytetrafluoroethylene-lined stainless steel autoclave at 433K (about 160°C) for 24h;

[0087] Cool to room temperature, centrifuge to obtain the product, wash with absolute ethanol and deionized water, and dry at 373K (about 100°C) to obtain a composite photocatalyst sample.

[0088] Bi in the prepared sample 2 S 3 The weight fraction is 13.3%, and its XRD spectrum is as figure 1 Shown in the curve marked b.

Embodiment 2

[0090] The present embodiment is the same as the method used in embodiment 1, the difference is only that in step 1 Bi(NO 3 ) 3 ·5H 2 The weight of O is 3.5 g. Bi in the prepared sample 2 S 3 The weight fraction is 26.5%, and its XRD spectrum is as figure 1 Shown in the curve marked c.

[0091] Its X-ray photoelectron spectroscopy Figure 3a ~ Figure 3d as shown,

[0092] Depend on Figure 3a It can be seen that there are Bi 4f peaks, Cl 2p peaks, S 2s peaks, and O1s peaks in the spectrum, that is, the sample contains Bi, Cl, S, and O elements (the C 1s peak is caused by the hydrocarbons brought by the measuring instrument itself. the peak);

[0093] Depend on Figure 3b It can be seen that the excitation energies of the two peaks of Bi 4f in the sample are 164.5eV and 159.2eV respectively;

[0094] Depend on Figure 3c It can be seen that the excitation energies of the two peaks of Cl 2p in the sample are 198.0eV and 199.4eV respectively;

[0095] Depend on Fig...

Embodiment 3

[0098] This embodiment is the same as the method used in embodiment 1, the difference is only that in step 1 the Bi(NO 3 ) 3 ·5H 2 Bi in the sample was prepared after the weight of O 2 S 3 The weight fraction is 39.8%, and its XRD spectrum is as figure 1 Shown in the curve marked d.

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Abstract

The invention discloses a compound photocatalyst Bi2S3 / BiOCl for ultraviolet catalytic degradation. Based on weight of the compound photocatalyst, Bi2S3 accounts for 10-40% in percentage by weight. The compound photocatalyst has a relatively strong ultraviolet catalytic degradation effect on sewage, particularly dye sewage, and the degradation rate can reach 94%. The compound photocatalyst is prepared by using a hydrothermal method, so that the synthesis of the compound photocatalyst has the advantages of simplicity in operation, conventional raw materials and easiness in realization.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a composite photocatalyst Bi for ultraviolet photocatalytic degradation 2 S 3 / BiOCl and its preparation method and application. Background technique [0002] Due to their great application potential in solar energy utilization, photocatalytic materials have been widely used in fields such as photolysis of water to produce hydrogen, organic wastewater treatment, and air purification. [0003] However, the high recombination rate of electrons and holes generated by the photocatalytic reaction leads to low quantum efficiency of the photocatalytic reaction, which largely affects the application of photocatalytic materials. [0004] In order to solve the above problems, researchers have made many attempts, including doping or optimizing the combination of catalysts, controlling the crystal form of catalysts, forming heterojunctions or coupling catalysts, etc. However, no satisfactory...

Claims

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Application Information

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IPC IPC(8): B01J27/06C02F1/32
CPCY02W10/37
Inventor 崔玉民李慧泉苗慧陶栋梁
Owner FUYANG NORMAL UNIVERSITY
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