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A preparation method for controlling the valence state of tio2 nanotube loaded metal

A technology for supporting metals and nanotubes, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Complex problems, to achieve the effect of not easy to damage, high experiment repetition rate, simple operation

Active Publication Date: 2015-09-23
GUODIAN SCI & TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is affected by the concentration and voltage of the electrolyte, and the concentration of the electrolyte changes with time. It is extremely difficult to control, and the operation requirements are very high. Moreover, the electrolyte also has adverse effects on the environment, the cost is high, and large-scale preparation is difficult. Practical application restricted
Furthermore, the stability and mechanism of the reaction of this method are not yet clear, and the experimental results in some aspects are inconsistent
In addition, the preparation of nanotubes by anodic oxidation requires crystallization treatment, which requires high energy consumption.
[0004] The template method is to use porous alumina or block copolymer as a template, combined with electrodeposition or sol-gel method to prepare ordered TiO 2 Nanotubes, but the yield is low, the cost is high, the process is complicated, and TiO is easy to be destroyed in the process of template removal and other post-processing 2 Nanotube Structure

Method used

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  • A preparation method for controlling the valence state of tio2 nanotube loaded metal
  • A preparation method for controlling the valence state of tio2 nanotube loaded metal
  • A preparation method for controlling the valence state of tio2 nanotube loaded metal

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1 Cu loaded iO 2 Preparation of nanotubes

[0023] (1) 0.8g TiO 2 (P25) with 100mL 10mol L -1 Mix KOH solution, stir for 30min, transfer to 150mL hydrothermal kettle with Teflon liner, and react hydrothermally at 150℃ for 24 hours;

[0024] (2) Cool to room temperature, pour off the supernatant, centrifuge to obtain a solid, wash three times with 100mL absolute ethanol, and centrifuge to obtain a solid;

[0025] (3) Control the mol ratio of glucose and copper acetate at 3 / 8, add in the ethanol solution of 0.02g morphology regulator polyethylene glycol, stir and pour into the hydrothermal kettle with polytetrafluoroethylene lining at 130 ℃ for 24 hours;

[0026] (4) Cool naturally, then wash off the organic matter and sodium ions on the surface with absolute ethanol and water. At this time, the pH value is about 7. Finally, the solid is vacuum-dried at 80°C for 5 hours and ground to obtain Cu-loaded TiO 2 nanotube.

Embodiment 2

[0027] Example 2Cu 2 O loaded TiO 2 Preparation of nanotubes

[0028] (1) 1.2g TiO 2 (P25) with 120mL 10mol L -1 mixed NaOH solution, stirred for 30min, transferred to a 150mL hydrothermal kettle with Teflon lining, and reacted hydrothermally at 150°C for 24 hours;

[0029] (2) Cool to room temperature, pour off the supernatant, centrifuge to obtain a solid, wash three times with 100mL absolute ethanol, and centrifuge to obtain a solid;

[0030] (3) Control the mol ratio of glucose and copper acetate to be 1 / 16, add in the ethanol solution of 0.02g morphology modifier polyethylene glycol, stir and pour into the hydrothermal kettle with polytetrafluoroethylene liner at 130 ℃ for 24 hours;

[0031] (4) Cool naturally, then wash off the organic matter and sodium ions on the surface with absolute ethanol and water. At this time, the pH value is about 7. Finally, the solid is vacuum-dried at 80°C for 5 hours and ground to obtain Cu 2 O loaded TiO 2 nanotube.

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Abstract

The invention discloses a preparation method for controlling valence state of metal loaded on TiO2 nanotube. The preparation method comprises the following processes: firstly preparing the TiO2 nanotube by using a hydrothermal-solvothermal combined method; then adjusting a ratio of a copper source to a reducing agent on the basis of the adjusting function of a shape regulator to control the valence state of the metal loaded on the TiO2 nanotube. According to the preparation method, the hydrothermal-solvothermal combined method is used for the first time for preparing a series of copper-loaded TiO2 nanotube compounds, so that the loaded copper and the TiO2 nanotube generate synergistic effect. Compared with a template method and an anodic oxidation method, the preparation method has the advantages of no high-temperature roasting process, simple operation, high experiment repetition rate and small possibility of damaging the structure of the TiO2 nanotube.

Description

technical field [0001] The present invention relates to a method for controlling TiO 2 A method for preparing nanotubes loaded with metal valence states. Background technique [0002] TiO 2 Due to their unique physical and chemical properties and good morphology, nanotubes have broad application prospects in the fields of photocatalysis, solar cells, sensors, and hydrogen storage. Cu doping can increase TiO 2 Oxygen vacancies on the surface increase the content of oxygen adsorbed on the surface, thereby increasing the quantum efficiency. Cu 2 O, as a p-type wide semiconductor, has a wide range of applications in solar energy conversion. Therefore, copper-based catalysts are widely used in industrial engineering, such as methanol synthesis, steam shift, methanol / steam reforming, CO 2 Reduction, photolysis of water to produce hydrogen, etc., and the copper element is abundant and cheap. Due to the close relationship between the valence state of copper and its catalytic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72
Inventor 柏源薛建明李忠华
Owner GUODIAN SCI & TECH RES INST
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