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A CDSE-modified porous tio with controllable morphology 2 Preparation methods and applications of materials

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: 2020-06-26
ANYANG NORMAL UNIV
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  • Claims
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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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  • A CDSE-modified porous tio with controllable morphology <sub>2</sub> Preparation methods and applications of materials
  • A CDSE-modified porous tio with controllable morphology <sub>2</sub> Preparation methods and applications of materials
  • A CDSE-modified porous tio with controllable morphology <sub>2</sub> Preparation methods and applications of materials

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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 CdSe-modified porous TiO with controllable morphology 2 Preparation method and application of materials, the preparation method includes the following steps: Step 1: Synthesis of monodispersed polystyrene microspheres (PS) with an average diameter of 500 nm; Step 2: Preparation of CdO-TiO 2 Intermediate: Using the polystyrene microspheres obtained in step 1) as a template, prepare CdO-TiO using the sol-gel method 2 Intermediate; Step 3: Preparation of porous TiO modified with nanosheets, nanopillars and nanoconical CdSe particles using a two-step method 2 catalyst of light. The material of the present invention is beneficial to the transfer of photoexcited electrons from the conduction band of CdSe to TiO 2 The conduction band and porous structure also increase the active sites for the reaction and improve the hydrogen production activity. This controllable growth composite material based on rational material design can achieve very good hydrogen evolution rate under visible light irradiation without the need for any precious metals as cocatalysts.

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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Patent Type & Authority Patents(China)
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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