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Preparation method of TiO2/ZnO heterogeneous nano fiber efficient photocatalyst

A nanofiber and photocatalyst technology, applied in the field of photocatalyst preparation, can solve the problems of low photocatalytic efficiency and low utilization rate of solar energy

Active Publication Date: 2020-10-20
国网浙江省电力有限公司双创中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problems of low solar energy utilization rate and low photocatalytic efficiency of traditional photocatalysts, and provide a TiO 2 / ZnO heterogeneous nanofiber high-efficiency photocatalyst preparation method, the prepared TiO 2 / ZnO heterogeneous nanofiber visible light photocatalyst has a high specific surface area and can efficiently split water to produce hydrogen under the irradiation of simulated sunlight

Method used

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  • Preparation method of TiO2/ZnO heterogeneous nano fiber efficient photocatalyst
  • Preparation method of TiO2/ZnO heterogeneous nano fiber efficient photocatalyst
  • Preparation method of TiO2/ZnO heterogeneous nano fiber efficient photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Dissolve 0.7g of polyvinylpyrrolidone (PVP) in a mixed solvent of 7ml of ethanol and 3ml of acetic acid, stir magnetically for 6 hours to obtain a homogeneous PVP solution, then slowly add 3ml of butyl titanate (TBOT) dropwise, and continue vigorously stirring for 2 hours Obtain PVP / TBOT precursor spinning solution. Spin under the electrospinning conditions of voltage 18kV and distance 15cm to obtain precursor fibers, and after drying in a constant temperature oven at 60°C, obtain cured precursor fibers. The prepared precursor fibers were calcined in a muffle sintering program furnace. The sintering temperature was 500°C, the heating rate was 1°C / min, and the holding time was 2h. After cooling to room temperature with the furnace, TiO was obtained. 2 Nanofibers, save for future use. figure 1 and figure 2 TiO prepared for 2 SEM images of nanofibers under different magnifications, indicating that the prepared material is a high-purity nanofiber material. image 3 Its...

Embodiment 2

[0048] The only difference from Example 1 is that the deposition cycle of the ZnO layer is 50 times, and other processes are the same as those in Example 1, and will not be repeated here.

Embodiment 3

[0050] The only difference from Example 1 is that the deposition cycle of the ZnO layer is 100 times, and other processes are the same as in Example 1, which will not be repeated here.

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Abstract

The invention belongs to the field of photocatalyst preparation, and particularly relates to a preparation method of a TiO2 / ZnO heterogeneous nano fiber efficient photocatalyst. The preparation methodcomprises the following steps: 1) preparing TiO2 nano fibers through electrostatic spinning; and 2) putting the TiO2 nano fibers into an atomic layer deposition system, and growing ZnO layer by layerafter deposition circulation by taking diethyl zinc and water as raw materials to obtain the ZnO-modified TiO2 heterogeneous nano fiber efficient photocatalyst. The prepared TiO2 / ZnO heterogeneous nano fiber photocatalyst has a one-dimensional nano fiber structure with a high specific surface area, and the photocatalyst compounded by the two semiconductors can effectively inhibit the compoundingof photo-induced electron-hole pairs and synergistically reinforce the photocatalytic performance.

Description

technical field [0001] The invention belongs to the field of photocatalyst preparation, in particular to a TiO 2 Preparation method of high-efficiency photocatalyst of / ZnO heterogeneous nanofibers. Background technique [0002] With the rapid development of modern industry, the energy crisis and environmental pollution are becoming more and more serious. The development and utilization of clean and efficient energy has become a top priority for all countries. As a renewable and clean energy source, solar energy is inexhaustible. How to effectively utilize solar energy has become a hot research topic at present. Photocatalytic technology has the advantages of directly absorbing solar energy to drive reactions at room temperature, and has become an ideal production technology for directly or indirectly converting solar energy into human-usable energy. The core of the application of photocatalytic technology lies in the development of photocatalysts. In the past decades of d...

Claims

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Application Information

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IPC IPC(8): B01J23/06B01J35/06C01B3/04
CPCB01J23/002B01J23/06C01B3/042C01B2203/0277C01B2203/1041B01J35/58B01J35/39Y02E60/36
Inventor 杨跃平周开河朱艳伟叶夏明侯慧林
Owner 国网浙江省电力有限公司双创中心