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Tin disulfide/titanium dioxide compound photocatalyst and preparation method thereof

A tin disulfide, titanium dioxide technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem that the two semiconductor components are difficult to mix uniformly and cannot be formed. Tight and firm interface, high process control requirements, to achieve large-scale preparation, avoid self-aggregation, and high photocatalytic reduction efficiency

Active Publication Date: 2015-09-09
澄城县海泰电子材料有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a tin disulfide / titanium dioxide composite photocatalyst, which solves the problem that the two semiconductor components in the existing physical mixing method are difficult to mix evenly, and the particles of different components cannot form a tight and firm interface.
[0006] Another object of the present invention is to provide the preparation method of the above-mentioned tin disulfide / titanium dioxide composite photocatalyst, which can prepare a tin disulfide / titanium dioxide composite material with heterogeneous components mixed more uniformly, and solve the existing operation steps of the existing preparation method Complex problems requiring high process control

Method used

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  • Tin disulfide/titanium dioxide compound photocatalyst and preparation method thereof
  • Tin disulfide/titanium dioxide compound photocatalyst and preparation method thereof
  • Tin disulfide/titanium dioxide compound photocatalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0053] Add tin tetrachloride pentahydrate to deionized water and stir for 10 minutes. The mass ratio of tin tetrachloride pentahydrate to deionized water is 0.007:1 to obtain mixture A; under stirring, add thiourea to the prepared In mixture A, the mass ratio of thiourea to mixture A is 0.0075:1, stir for 20 minutes, and transfer the resulting solution to a reactor lined with polytetrafluoroethylene, and heat it hydrothermally at 160°C for 12 hours; the reaction is complete The latter solution was naturally cooled to room temperature, and the solution was centrifuged, and then washed with absolute ethanol and deionized water 3 times, and dried in an oven at 60~80℃ for 10 hours to obtain yellow tin disulfide powder; The prepared tin disulfide powder was dispersed in absolute ethanol, and 5 g of tin disulfide powder was added per liter of absolute ethanol, followed by ultrasonic dispersion for 30 minutes to obtain mixture B; adding butyl titanate to mixture B, butyl titanate The ...

Embodiment 2

[0056] Add tin tetrachloride pentahydrate to deionized water and stir for 13 min. The mass ratio of tin tetrachloride pentahydrate to deionized water is 0.005:1 to obtain mixture A; under stirring, add thiourea to the prepared In mixture A, the mass ratio of thiourea to mixture A is 0.0058:1, stir for 30 minutes, transfer the resulting solution to a reactor with a polytetrafluoroethylene lining, and heat it hydrothermally at 170°C for 16 hours; the reaction is complete The latter solution was naturally cooled to room temperature, and the solution was centrifuged, and then washed 4 times with absolute ethanol and deionized water, and dried in an oven at 65°C for 12 hours to obtain yellow tin disulfide powder; weigh the obtained Disperse the tin disulfide powder in absolute ethanol, add 7g tin disulfide powder per liter of absolute ethanol, and disperse ultrasonically for 40 minutes to obtain mixture B; add butyl titanate to mixture B, butyl titanate and mixture The mass ratio of...

Embodiment 3

[0059] Add tin tetrachloride pentahydrate to deionized water and stir for 17 min. The mass ratio of tin tetrachloride pentahydrate to deionized water is 0.0039:1 to obtain mixture A; under stirring, add thiourea to the prepared In mixture A, the mass ratio of thiourea to mixture A is 0.0044:1, stir for 45 minutes, and transfer the resulting solution to a reactor lined with polytetrafluoroethylene, and heat it hydrothermally at 180°C for 20 hours; the reaction is complete After the solution was naturally cooled to room temperature, the solution was centrifuged, and then washed with absolute ethanol and deionized water for 5 times, and dried in an oven at 75°C for 13 hours to obtain yellow tin disulfide powder; weigh the obtained product Disperse the tin disulfide powder in absolute ethanol, add 8g tin disulfide powder per liter of absolute ethanol, and ultrasonically disperse for 50 minutes to obtain mixture B; add butyl titanate to mixture B, butyl titanate and mixture The mass...

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Abstract

The invention discloses a tin disulfide / titanium dioxide compound photocatalyst which is prepared from a precursor solution through hydrothermal reaction, wherein the precursor solution is prepared from tin disulfide powder and butyl titanate in the mass ratio of 1:(20-100). The compound photocatalyst has controllable size, tin disulfide is of a hexagonal nanoscale flake shape, titanium dioxide nano-particles are uniformly loaded on tin disulfide, and the photocatalyst material has high photocatalytic reduction efficiency on potassium dichromate in a water body. The invention also discloses a preparation method of the compound photocatalyst. The preparation method comprises the following steps: a. preparing tin disulfide powder from tin chloride pentahydrate and thiourea; b. mixing the tin disulfide powder and butyl titanate to prepare the precursor solution; and c. hydrothermally heating the prepared precursor solution to prepare the compound photocatalyst. The preparation steps are simplified greatly, the control difficulty of technological parameters is lowered, and the large-scale preparation of the tin disulfide / titanium dioxide compound photocatalyst is realized.

Description

Technical field [0001] The invention belongs to the technical field of photocatalyst preparation, and relates to a nanocomposite photocatalytic material, in particular to a tin disulfide / titanium dioxide composite photocatalyst. The invention also relates to a preparation method of the tin disulfide / titanium dioxide composite photocatalyst. Background technique [0002] Photocatalysis technology is an emerging environmental protection technology gradually developed from the 1970s. It mainly uses the characteristics of semiconductor oxide materials that can be activated under light conditions, which can effectively oxidize and decompose organic matter and reduce heavy metal ions. , Kill bacteria and eliminate peculiar smell, it has a wide range of applications in wastewater treatment, gas purification and many other fields. [0003] The research and development of high-performance photocatalysts is crucial to the treatment of wastewater containing hexavalent chromium ions and the us...

Claims

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Application Information

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IPC IPC(8): B01J23/14B82Y30/00B82Y40/00C02F1/30C02F101/22
Inventor 刘辉官杰杨洋邓璐朱振峰
Owner 澄城县海泰电子材料有限责任公司
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