Method for in-situ preparation of graphite-like-phase carbon nitride quantum dot/titanium dioxide nanotube array visible-light-induced photocatalyst

A graphitic carbon nitride and nanotube array technology, which is applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of time-consuming and energy-consuming, complex preparation methods, etc., and save energy. Energy, simple preparation, and the effect of improving the catalytic performance of visible light

Active Publication Date: 2016-08-17
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many problems in the preparation and application of the reported graphite-like titanium nitride and titanium dioxide composite photocatalytic materials.
On the one hand, the preparation method is relatively complicated, time-consuming and energy-consuming. On the other hand, the catalyst is mostly a powder material, which is more complicated in the recycling of photocatalysts, such as photocatalytic water splitting for hydrogen production and photocatalytic degradation of organic pollution. In applications such as chemicals, it is necessary to go through steps such as separation and purification to realize the recycling of the catalyst

Method used

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  • Method for in-situ preparation of graphite-like-phase carbon nitride quantum dot/titanium dioxide nanotube array visible-light-induced photocatalyst
  • Method for in-situ preparation of graphite-like-phase carbon nitride quantum dot/titanium dioxide nanotube array visible-light-induced photocatalyst
  • Method for in-situ preparation of graphite-like-phase carbon nitride quantum dot/titanium dioxide nanotube array visible-light-induced photocatalyst

Examples

Experimental program
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Effect test

Embodiment 2

[0031] 1) Take a 2.0cm×5.0cm pure titanium sheet (purity ≥ 99.0%), dip it in a mixed acid solution of 10ml hydrofluoric acid, 40ml nitric acid, and 50ml water for 5min, then take it out and rinse it with deionized water; Put it into acetone, isopropanol, methanol, ethanol, and water for ultrasonic cleaning for 15 minutes, and finally take it out and dry it for later use;

[0032] 2) Take 200ml of water, 200ml of glycerin, and 4.0g of ammonium fluoride to prepare an electrolyte; take 0.1g of melamine and add it to the electrolyte, and stir for 5 minutes to fully mix;

[0033] 3) The cleaned titanium sheet is used as the anode, the platinum wire is used as the cathode, and the distance between the two electrodes is 2.0cm, and the voltage is boosted from zero to 20V at a rate of 250mV / s, and kept at 20V for 2h to perform anodic oxidation;

[0034] 4) After anodizing, take out the titanium sheet and rinse it with deionized water to remove excess electrolyte, put it in a muffle fur...

Embodiment 3

[0036] 1) Take a 2.0cm×5.0cm pure titanium sheet (purity ≥ 99.0%), dip it in a mixed acid solution of 10ml hydrofluoric acid, 40ml nitric acid, and 50ml water for 5min, then take it out and rinse it with deionized water; Put it into acetone, isopropanol, methanol, ethanol, and water for ultrasonic cleaning for 15 minutes, and finally take it out and dry it for later use;

[0037]2) Weigh 5g of melamine powder, place it in a capped alumina crucible, keep it warm for 2 hours at 520 degrees Celsius, take it out and grind it to obtain graphite-like carbon nitride;

[0038] 3) Take 200ml of water, 200ml of glycerin, and 4.0g of ammonium fluoride to prepare an electrolyte; take 0.1g of graphite-like carbon nitride powder and add it to the electrolyte, and stir for 5 minutes to fully mix;

[0039] 4) The cleaned titanium sheet is used as the anode, the platinum wire is used as the cathode, the distance between the two electrodes is 2.0cm, and the anodic oxidation process is carried o...

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Abstract

The invention discloses a method for in-situ preparation of a carbon nitride quantum dot / titanium dioxide nanotube array visible-light-induced photocatalyst. The method comprises the steps of 1, cleaning a pure titanium sheet to serve as a substrate for anodizing preparation of a titanium dioxide nanotube array; 2, adding a certain number of graphite-like-phase carbon nitride precursors to electrolyte adopted for anodizing preparation of the titanium dioxide nanotube array; 3, conducting heat treatment on the amorphous-state titanium dioxide nanotube array after anodizing, so that the graphite-like-phase carbon nitride quantum dot / titanium dioxide nanotube array visible-light-induced photocatalyst is obtained. The preparing method is simple and quick, economical and environmentally friendly, and the prepared graphite-like-phase carbon nitride quantum dot / titanium dioxide nanotube array visible-light-induced photocatalyst has high visible light catalysis property, stability and recyclability.

Description

technical field [0001] The invention relates to a method for preparing a titanium dioxide nanotube array supported by graphite-like carbon nitride quantum dots, and belongs to the technical field of environmentally friendly photocatalytic materials. Background technique [0002] As an effective way to solve the problems of environmental pollution and energy shortage, semiconductor photocatalysis technology has received extensive attention and research in recent years. Since Fujishima and Honda discovered in 1972 that titanium dioxide electrodes can split water to produce hydrogen (Fujishima, Nature, 1972, 238:37), titanium dioxide (TiO 2 ) have received extensive attention in the field of photocatalysis. Titanium dioxide has the advantages of economy, non-toxicity, good stability and high photocatalytic activity, and has been widely studied and applied in the field of semiconductor photocatalysis. Compared with traditional titanium dioxide materials, the regularly arranged...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/004
Inventor 陈智周丹彤魏其艳
Owner CHINA JILIANG UNIV
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