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Preparation method and application for morphology-controlled CdSe-modified porous TiO2 material

A shape and cone technology, applied in the field of nanomaterials, can solve the problem of high recombination rate of photogenerated electrons and holes

Inactive Publication Date: 2018-06-26
ANYANG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, TiO 2 The wide band gap is 3.2eV, which can only be used to absorb ultraviolet light in sunlight, which only accounts for 5% of the total sunlight
In addition, the photogenerated electron and hole recombination rate is high, which limits the TiO 2 Application in visible light degradation and hydrogen production system

Method used

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  • Preparation method and application for morphology-controlled CdSe-modified porous TiO2 material
  • Preparation method and application for morphology-controlled CdSe-modified porous TiO2 material
  • Preparation method and application for morphology-controlled CdSe-modified porous TiO2 material

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Embodiment 1

[0044] A kind of preparation method of the CdSe modified porous TiO2 material with controllable morphology, comprising the steps:

[0045] Step 1: Synthesizing monodisperse polystyrene microspheres (PS) with an average diameter of 500 nm;

[0046] Step 2: Preparation of CdO-TiO 2 Intermediate: Using the polystyrene microspheres obtained in step 1) as a template, CdO-TiO was prepared by sol-gel method 2 Intermediate; The sol-gel method prepares CdO-TiO 2 The preparation steps of the intermediate are as follows:

[0047] 1) Put 0.75mLTBOT into 5mL of absolute ethanol, and then magnetically stir at room temperature for 1h to obtain a butyl titanate solution, which is designated as solution A;

[0048] 2) Add 5mL of absolute ethanol to the mixture solution containing 0.5mL of glacial acetic acid and 0.75mL of deionized water, and record it as solution B;

[0049] 3) Then slowly add solution B into solution A, and stir vigorously for 1 hour to obtain a uniform sol-gel;

[0050...

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Abstract

The invention discloses a preparation method and application for a morphology-controlled CdSe-modified porous TiO2 material. The preparation method comprises the following steps: Step I: synthesizingmonodisperse polystyrene microspheres (PS) with an average diameter of 500 nm; Step II: preparing CdO-TiO2 intermediate: preparing CdO-TiO2 intermediate by using the polystyrene microspheres obtainedin Step I) as a template in a sol-gel method; Step III: preparing nanosheets, nanorods and nano-conical CdSe particle-modified porous TiO2 photocatalyst in a two-step method. By means of the material,optically stimulated electrons can be transferred from a conduction band of CdSe to a conduction band of TiO2, the porous structure also improves active sites of the reaction, and the hydrogen production activity is improved. The growth-controlled composite material designed based on a reasonable material can obtain very good hydrogen evolution speed under visible light without any precious metalas a promoter.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a CdSe-modified porous TiO with controllable synthesis of nanosheets, nanocolumns and nanocones. 2 Materials, their preparation methods and applications. Background technique [0002] With the increasingly prominent problems of energy shortage and environmental pollution, the photo-splitting water hydrogen production system has attracted more and more researchers' attention. Therefore, it has become a research hotspot to design and develop an efficient photocatalytic material to convert solar energy. Since 1972, TiO2 was reported in Teng Island, Japan 2 Semiconductor electrodes can be used to split water to produce hydrogen, so far, TiO 2 Based photocatalytic materials are still the focus of research in the field of visible light chemistry. However, TiO 2 The wide band gap of 3.2eV can only be used to absorb ultraviolet light in sunlight, which only accounts for 5% of ...

Claims

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Application Information

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IPC IPC(8): B01J23/14B01J35/00B01J35/02B01J35/10C01B3/04
CPCC01B3/042B01J23/002B01J23/14C01B2203/1041C01B2203/0277B01J2523/00B01J35/60B01J35/40B01J35/39B01J2523/28B01J2523/3712B01J2523/47Y02E60/36
Inventor 杜记民王卫民李素娟杨梦可韩玉民李凯迪
Owner ANYANG NORMAL UNIV
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