Quantum dot-sensitized graphene base mesoporous coating CdSe @ MT/GR visible light-catalyzing composite nanometer material and preparation method thereof

A composite nanomaterial, quantum dot sensitization technology, applied in the direction of luminescent materials, physical/chemical process catalysts, nanotechnology, etc., to achieve the effects of reduced processing cost, low production cost, and simple preparation process

Active Publication Date: 2015-05-06
JISHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] However, it is worth noting that, so far, there has been no preparation of quantum dots as a sensitizer, combining the high conductivity of graphene and the coating properties of mesoporous nanomaterials, that is, CdSe quantum dots sensitized graphene-based mesoporous coated titanium oxide. (mesoporous TiO 2 –coated on graphene with CdSe quantum dots; an effective method for (CdSeMT / GR) composite nanophotocatalytic materials

Method used

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  • Quantum dot-sensitized graphene base mesoporous coating CdSe @ MT/GR visible light-catalyzing composite nanometer material and preparation method thereof
  • Quantum dot-sensitized graphene base mesoporous coating CdSe @ MT/GR visible light-catalyzing composite nanometer material and preparation method thereof
  • Quantum dot-sensitized graphene base mesoporous coating CdSe @ MT/GR visible light-catalyzing composite nanometer material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1: first take octadecene, oleic acid, chloroform, CdO, Se powder as raw material, according to weight ratio octadecene: oleic acid: chloroform: CdO: Se powder=3:5:1:1, by solvothermal CdSe quantum dots were synthesized by stirring for 30 min in oleic acid solvent at a temperature of 70 °C. Using ultrasonic mixing (mixing conditions: time 30min, ultrasonic power 70W), the N-alkylpyridine cation (N-butylpyridine tetrafluoroborate aqueous solution, 20ml, 17mg L -1 ) and the CdSe quantum dots prepared above (30ml, 3umol L -1 ) to form functionalized IL–CdSe. Secondly, introduce the functionalized IL–CdSe into the three-necked flask, and use the dissolution self-assembly process to mix 60 g of butyl titanate with a purity of 99.0% and 2 ml of concentrated hydrochloric acid (37 mass %), and then add it dropwise to the above-mentioned three-necked flask In the process, ultrasonic stirring was continued at 40 °C to form IL–CdSeTi inorganic source sol. Add the IL–C...

Embodiment 2

[0044] Embodiment 2: first take octadecene, oleic acid, chloroform, CdO, Se powder as raw material, according to weight ratio octadecene: oleic acid: chloroform: CdO: Se powder=3:6:1:1.2, by solvothermal CdSe quantum dots were synthesized by stirring for 30 min in oleic acid solvent at a temperature of 70 °C. Using ultrasonic mixing (mixing conditions: time 30min, ultrasonic power 70W), the N-alkylpyridinium cation (N-butylpyridine chloride salt, 20ml, 17mg L -1 ) and the CdSe quantum dots prepared above (30ml, 3umol L -1 ) to form functionalized IL–CdSe. Secondly, the functionalized IL–CdSe was introduced into a three-necked flask, and 60 g of butyl titanate with a purity of 99.0% and 2 ml of concentrated hydrochloric acid (37 mass %) were mixed, and then added dropwise to the three-necked flask In , continue ultrasonic stirring to form IL–CdSeTi inorganic source. Add the IL–CdSeTi inorganic source sol into the hydrothermal reactor, then put 50g graphene into the hydrother...

Embodiment 3

[0046] Embodiment 3: first take octadecene, oleic acid, chloroform, CdO, Se powder as raw material, according to weight ratio octadecene: oleic acid: chloroform: CdO: Se powder=3:5:1:1, by solvothermal CdSe quantum dots were synthesized by stirring for 30 min in oleic acid solvent at a temperature of 70 °C. Using ultrasonic mixing (mixing conditions: time 30min, ultrasonic power 70W), the N-alkylpyridinium cation (N-hexylpyridine chloride salt, 20ml, 17mg L -1 ) and the CdSe quantum dots prepared above (30ml, 3umol L -1 ) to form functionalized IL–CdSe. Secondly, introduce the functionalized IL–CdSe into the three-necked flask, and use the dissolution self-assembly process to mix 60 g of butyl titanate with a purity of 99.0% and 2 ml of concentrated hydrochloric acid, then drop them into the three-necked flask, and continue to stir ultrasonically , forming IL–CdSeTi inorganic source. Add the IL–CdSeTi inorganic source sol into the hydrothermal reactor, then put 50g graphene...

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Abstract

The invention relates to a quantum dot-sensitized grapheme base mesoporous coating CdSe @ MT / GR high-performance visible light-catalyzing composite nanometer material and a preparation method thereof. According to the invention, CdSe@MT is loaded in to a graphene base by adopting a functionalized ionic liquid self-assembling method through a hydrothermal process, a soxhlet extraction and a low-temperature heating treatment. The preparation method disclosed by the invention has the outstanding characteristics that a quantum dot-sensitized graphene base mesoporous coating CdSe @ MT / GR high-performance visible light-catalyzing composite nanometer material with a novel structure and good physical and chemical properties is prepared by using a functionalized ionic liquid self-assembling method, so as to provide a new way for TiO2-type light-catalyzing material application studies. The preparation method is simple in process and easy to industrially produce. The prepared mesoporous nanometer material has large specific surface area, even pore size distribution and good visible light-catalyzing performance.

Description

technical field [0001] The invention relates to a quantum dot-sensitized graphene-based mesoporous-coated CdSeMT / GR visible light catalytic composite nanomaterial and a preparation process, belonging to the field of functional materials. Background technique [0002] The control and treatment of environmental pollution is a major issue that the sustainable development of human society must face and urgently need to be solved. Photocatalytic engineering technology is an advanced technology that directly converts low-density solar energy into the energy required for chemical reactions, and is used to degrade and mineralize various pollutants. It is an effective way to solve environmental pollution problems. TiO 2 Because of its biological and chemical inertness, no photocorrosion and chemical corrosion, and low price, it has been proved to be the most widely used photocatalyst. Due to TiO 2 The electron distribution of is characterized by the presence of a band gap betwee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J21/06B82Y30/00B82Y40/00C09K11/88C09K11/02A62D3/17A62D101/26A62D101/28
Inventor 李佑稷李铭
Owner JISHOU UNIVERSITY
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