Preparation method and application of red phosphorus-cladded titanium dioxide nano fiber photocatalytic material

A photocatalytic material and nanofiber technology, applied in the field of photocatalytic materials, can solve the problem of low utilization rate of sunlight, achieve the effect of improving the spectral absorption range, improving the performance of photocatalytic hydrogen production, and promoting effective separation and transmission

Active Publication Date: 2017-11-24
青岛鲁润能源环境有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the existing TiO 2 To solve the problem of low solar light utilization rate of photocatalytic materials, the invention discloses a preparation method of red phosphorus-coated titanium dioxide nanofiber photocatalytic materials, comprising the following steps:

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  • Preparation method and application of red phosphorus-cladded titanium dioxide nano fiber photocatalytic material
  • Preparation method and application of red phosphorus-cladded titanium dioxide nano fiber photocatalytic material

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Embodiment 1

[0028] The preparation method of the red phosphorus-coated titanium dioxide nanofiber photocatalytic material of the present embodiment comprises the following steps:

[0029] a. Add 3g TiO 2 Mix anatase powder with 50ml NaOH solution, and then ultrasonically shake the mixed solution for 0.3h;

[0030] b. After the ultrasonic vibration is completed, the solution is transferred to a reaction kettle lined with polytetrafluoroethylene, and the reaction kettle is placed in an oven for hydrothermal reaction at 150°C for 45 hours. After the reaction is completed, the precursor sodium titanate nano fiber;

[0031] c, sodium titanate nanofibers are washed with deionized water, and then pickled three times with HCl solution to make Na + By H + Completely replaced, and finally titanate nanofibers are obtained;

[0032] d. Continue to repeatedly wash the titanate nanofibers with deionized water for several times until the pH value = 7, and then undergo suction filtration, drying, and...

Embodiment 2

[0037] The preparation method of the red phosphorus-coated titanium dioxide nanofiber photocatalytic material of the present embodiment comprises the following steps:

[0038] a. Add 5g TiO 2 Mix anatase powder with 80ml NaOH solution, and then ultrasonically shake the mixed solution for 0.5h;

[0039] b. After the ultrasonic vibration is completed, the solution is transferred to a reaction kettle lined with polytetrafluoroethylene, and the reaction kettle is placed in an oven for hydrothermal reaction at 180°C for 48 hours. After the reaction is completed, the precursor sodium titanate nano fiber;

[0040] c, sodium titanate nanofibers are washed with deionized water, and then pickled three times with HCl solution to make Na + By H + Completely replaced, and finally titanate nanofibers are obtained;

[0041] d. Continue to repeatedly wash the titanate nanofibers with deionized water for several times until the pH value = 7, and then undergo suction filtration, drying, and...

Embodiment 3

[0046] The preparation method of the red phosphorus-coated titanium dioxide nanofiber photocatalytic material of the present embodiment comprises the following steps:

[0047] a. Put 8g TiO 2 Mix anatase powder with 100ml NaOH solution, and then ultrasonically shake the mixed solution for 0.7h;

[0048] b. After the ultrasonic vibration is completed, transfer the solution to a reaction kettle lined with polytetrafluoroethylene, put the reaction kettle in an oven, and conduct a hydrothermal reaction at 200°C for 50 hours. After the reaction is completed, the precursor sodium titanate nano fiber;

[0049] c, sodium titanate nanofibers are washed with deionized water, and then pickled three times with HCl solution to make Na + By H + Completely replaced, and finally titanate nanofibers are obtained;

[0050] d. Continue to repeatedly wash the titanate nanofibers with deionized water for several times until the pH value = 7, and then undergo suction filtration, drying, and gri...

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Abstract

The invention discloses a preparation method of a red phosphorus-cladded titanium dioxide nano fiber photocatalytic material. The preparation method comprises the following steps: (1) preparing nano fiber titanate through a hydrothermal method; (2) roasting the nano fiber titanate, so as to obtain anatase titanium dioxide nano fiber; (3) grinding and mixing the anatase titanium dioxide nano fiber and red phosphorus, encapsulating the mixture in a quartz tube, and roasting the quartz tube at high temperature under a vacuum condition, so as to prepare the red phosphorus-cladded titanium dioxide nano fiber photocatalytic material. The invention further discloses the application of the red phosphorus-cladded titanium dioxide nano fiber photocatalytic material in potocatalytic hydrogen production. According to the preparation method disclosed by the invention, the surface of the titanium dioxide nano fiber only with ultraviolet response is coated with the red phosphorus with visible-light response, so that the spectral absorption range of the photocatalytic material is obviously enlarged, and effective separation and transmission of photogenerated charges is further promoted; therefore, the potocatalytic hydrogen production performance of the material is improved.

Description

technical field [0001] The invention relates to the field of photocatalytic materials, in particular to a preparation method and application of red phosphorus-coated titanium dioxide nanofiber photocatalytic materials. Background technique [0002] Severe environmental pollution and huge energy consumption caused by the rapid development of the world economy have become major problems to be solved urgently in all countries, and this is also the primary problem related to the survival and development of human beings. Faced with energy problems and the resulting environmental problems, countries around the world are eager to find renewable, efficient and clean new energy sources. [0003] Solar energy can efficiently convert solar energy into chemical energy by splitting water into hydrogen and oxygen. Among them, hydrogen energy is a kind of clean energy. The product of complete combustion of hydrogen is water, which will not cause any pollution to the environment. It is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18C01B3/04
CPCB01J21/063B01J27/14B01J27/18B01J35/0006B01J35/004C01B3/042C01B2203/0277C01B2203/1088Y02E60/36
Inventor 耿超杨东江车延科
Owner 青岛鲁润能源环境有限公司
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