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G-C3N4 quantum dot modified titanium oxide nanotube catalyst as well as preparation method and application thereof

A titanium oxide nanotube, g-c3n4 technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as inability to produce hydrogen, low quantum efficiency, etc. The method is simple and efficient, and the effect of photoelectric catalytic hydrogen production performance

Inactive Publication Date: 2014-03-26
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the anatase TiO 2 The band gap is 3.2eV, it can only absorb ultraviolet light (accounting for 4% of sunlight), the quantum efficiency is low, and it cannot be used for actual production of hydrogen

Method used

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  • G-C3N4 quantum dot modified titanium oxide nanotube catalyst as well as preparation method and application thereof
  • G-C3N4 quantum dot modified titanium oxide nanotube catalyst as well as preparation method and application thereof
  • G-C3N4 quantum dot modified titanium oxide nanotube catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 1g of urea to the crucible with a cover, place a titanium oxide nanotube 3cm away from the precursor to embed it in the crucible, and finally cover it, put it in a muffle furnace for calcination at 550°C for 4 hours, and raise the temperature The rate is 5°C, and finally washed in 0.1M nitric acid solution to obtain g-C 3 N 4 Quantum dot-modified titanium oxide nanotube photocatalyst. Titanium oxide nanotubes prepared by anodic oxidation with a titanium sheet as the substrate have a size of 20mm*33mm*0.3mm.

Embodiment 2

[0021] Add 3g of urea to a crucible with a lid, put titanium oxide nanotubes 2.5cm away from the precursor to embed them in the crucible, and finally cover it, put it in a muffle furnace for calcination at 550°C for 4 hours, and raise the temperature The rate is 5°C, and finally washed in 0.1M nitric acid solution to obtain g-C 3 N 4 Quantum dot-modified titanium oxide nanotube photocatalyst.

Embodiment 3

[0023] Add 5g of urea to a crucible with a lid, place titanium oxide nanotubes 2cm away from the precursor to embed them in the crucible, and finally cover them and put them in a muffle furnace for calcination at 550°C for 4 hours. at 5°C, and finally washed in 0.1M nitric acid solution to obtain g-C 3 N 4 Quantum dot-modified titanium oxide nanotube photocatalyst.

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Abstract

The invention discloses a simple chemical vapor deposition (CVD) method for synthesizing a g-C3N4 ultra small quantum-dot modified titanium oxide nanotube catalyst. According to the invention, the previously synthesized titanium oxide nanotube array is used as the base, a precursor is firstly placed in a crucible, through adopting the high temperature treatment method, the precursor is enabled to become steam, and deposited in the titanium oxide nanotube, then the precursor is condensed into nucleuses in the titanium oxide nanotube to form g-C3N4 of the quantum dot. Due to the obtained catalyst in the visible light, the material is enabled to have the hydrogen producing performance in the visible light by utilizing the photoelectrocatalysis device. According to the invention, the CVD method is adopted to calcine materials in a muffle furnace to obtain the photocatalyst with visible-light response, and the catalyst can show the excellent visible light photocatalytic activity under the effect of photoelectrocatalysis. The catalyst is simple in preparation method, can be produced in large batch, causes no environment pollution during the preparation process, and can be widely applied to the fields of visible regions of the sunlight, solar cells, antibiosis, photocatalysis treatment of pollutants and the like.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a method for preparing a highly efficient hydrogen-producing visible light-responsive photoelectric catalyst. Specifically, a certain amount of precursors and titanium oxide nanotube arrays are put into a crucible and calcined in a muffle furnace to synthesize the obtained catalyst. It has photocatalytic hydrogen production performance under visible light. Background technique [0002] With the growth of population and economy, environmental and energy issues have become two major factors restricting human development. The energy crisis is always threatening our lives, but semiconductor photocatalysts have unique advantages in treating dye wastewater and producing hydrogen by photolysis of water. Compared with the traditional treatment of photocatalytic hydrogen production, photocatalytic hydrogen production has a fast method of separating photogenerated electrons and holes, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C25B1/04
CPCY02E70/10Y02E60/366Y02E60/36
Inventor 李贵生廉孜超李鑫崔莹莹李和兴
Owner SHANGHAI NORMAL UNIVERSITY
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