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GQD (graphene quantum dot) sensitized mesoporous Ti coated type GQD@TiO2/CG (conductive glass) visible light catalytic electrode and preparation technology thereof

A technology of graphene quantum dots and preparation process, applied in the direction of physical/chemical process catalyst, chemical/physical process, electrochemical water/sewage treatment, etc., can solve the problem of low photocatalytic activity and photocatalytic efficiency, limit practical application, quantum It can reduce the degradation cost, reduce the production cost, and achieve the effect of wide application

Active Publication Date: 2015-04-29
JISHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

We know that QDs are directly covered on the surface of the titanium film. Due to the collision with the reactant, the quantum dots are easy to fall off, so that the photocatalytic activity and photocatalytic efficiency are not high, which affects and limits its practical application.

Method used

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  • GQD (graphene quantum dot) sensitized mesoporous Ti coated type GQD@TiO2/CG (conductive glass) visible light catalytic electrode and preparation technology thereof
  • GQD (graphene quantum dot) sensitized mesoporous Ti coated type GQD@TiO2/CG (conductive glass) visible light catalytic electrode and preparation technology thereof
  • GQD (graphene quantum dot) sensitized mesoporous Ti coated type GQD@TiO2/CG (conductive glass) visible light catalytic electrode and preparation technology thereof

Examples

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Effect test

Embodiment 1

[0045] Example 1: First, using glyceryl monostearate (20g), distilled water (35ml) and graphene quantum dots (50mg) as raw materials, the in-situ The core-shell liquid crystal is synthesized by polymerization technology. Secondly, the liquid phase method is used to mix 60g of titanium tetrachloride with a purity of 99.0%, 60ml of distilled water and 5ml of concentrated hydrochloric acid (37%) to control the pH between 1-3. Add it into a three-necked bottle, and stir well with a GS122 electronic constant speed stirrer. Then add the core-shell liquid crystal into the three-neck flask to form GQD-liquid crystal TiO 2 Inorganic precursor solution; in addition, conductive glass (3cm × 7cm) is put into sprayer, and the optimal distance of nozzle from conductive carbon felt is 60cm, internal temperature 20 ℃, relative humidity 60%, spray pressure 2MPa, spray flow rate 0.01ml / min, spray 3ml / cm per square centimeter on the surface of conductive glass 2 . Obtaining GQD-LC TiO 2 Ino...

Embodiment 2

[0047] Example 2: First, using glyceryl monolaurate (20g), distilled water (35ml) and graphene quantum dots (50mg) as raw materials, under the conditions of a temperature of 50°C, a pressure of 1 atmosphere, and a reaction time of 90min, by in-situ polymerization Technology to synthesize core-shell liquid crystals. Next, use the liquid phase method to mix 60g of titanium tetrachloride with a purity of 99.0%, 60ml of distilled water and 5ml of concentrated hydrochloric acid, control the pH value between 1–3, and add it to a three-necked bottle. , Stir well with a GS122 electronic constant speed stirrer. Then add the core-shell liquid crystal into the three-neck flask to form GQD-liquid crystal TiO 2 Inorganic precursor solution; in addition, conductive glass (3cm × 7cm) is put into sprayer, and the optimal distance of nozzle from conductive carbon felt is 60cm, internal temperature 20 ℃, relative humidity 65%, spray pressure 6MPa, spray flow rate 0.02ml / min, spray 3.5ml / cm pe...

Embodiment 3

[0049] Example 3: First, using glycerol monooleate (20g), distilled water (35ml) and graphene quantum dots (50mg) as raw materials, under the conditions of a temperature of 60°C, a pressure of 1 atmosphere, and a reaction time of 80min, by in-situ polymerization Technology to synthesize core-shell liquid crystals. Next, use the liquid phase method to mix 50g of titanium tetrachloride with a purity of 99.0%, 60ml of distilled water and 5ml of concentrated hydrochloric acid, control the pH value between 1–3, and add it to a three-necked bottle. , Stir well with a GS122 electronic constant speed stirrer. Then add the core-shell liquid crystal into the three-neck flask to form GQD-liquid crystal TiO 2 Inorganic precursor solution; in addition, conductive glass (3cm × 7cm) is put into sprayer, and the optimal distance of nozzle from conductive carbon felt is 60cm, internal temperature 20 ℃, relative humidity 65%, spray pressure 4MPa, spray flow rate 0.03ml / min, spray 4ml / cm per s...

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Abstract

The invention relates to a GQD (graphene quantum dot) sensitized mesoporous Ti coated type GQD@TiO2 / CG (conductive glass) visible light catalytic electrode and a preparation technology thereof. A core-shell liquid crystal synthesized with an in situ polymerization technology is adopted as a template to prepare the visible light catalytic GQD@TiO2 / CG electrode through spray deposition, Soxhlet extraction and low-temperature heat treatment. The method has the outstanding characteristics as follows: the GQD sensitized mesoporous Ti coated type GQD@TiO2 / CG with a novel structure and visible light catalytic capacity is prepared with a spray coating technology and a core-shell liquid crystal template method, and a new approach is provided for application research of porous material supported mesoporous doped TiO2 photocatalytic materials. The process is simple, industrial production is easy, and the prepared efficient gas diffusion photoelectrode mesoporous material supported composite nanomaterial has high electrical conductivity, large specific surface area and uniform pore size distribution.

Description

technical field [0001] The invention relates to graphene quantum dot sensitized mesoporous titanium-coated GQDTiO 2 The / CG visible light catalytic electrode and its preparation process belong to the field of functional materials. Background technique [0002] 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 between its conduction and valence bands. When illuminated, as long as the energy of the photon is equal to or exceeds the band gap energy of the semiconductor (hν≥E g ), the electrons can transition from the valence band to the conduction band, thereby generating conduction band electrons and valence band holes. Under the action of the electric field of the space charge layer, the free electrons in the conduction band quickly migrate to the surface of the...

Claims

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Application Information

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IPC IPC(8): B01J21/06C02F1/46C02F1/30
Inventor 李佑稷林晓
Owner JISHOU UNIVERSITY
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