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Silver silicate and titanium dioxide four-side nanorod composite catalyst

A technology of composite catalyst and titanium dioxide, which is applied in the field of nanocomposite materials and photocatalysis, can solve the problems of low utilization rate of solar energy and achieve excellent catalytic performance

Active Publication Date: 2022-05-06
INNER MONGOLIA AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium dioxide photocatalyst has excellent photocatalytic oxidation performance, however, because titanium dioxide has a relatively wide energy band and mainly absorbs ultraviolet light, the utilization rate of solar energy is very low

Method used

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  • Silver silicate and titanium dioxide four-side nanorod composite catalyst
  • Silver silicate and titanium dioxide four-side nanorod composite catalyst
  • Silver silicate and titanium dioxide four-side nanorod composite catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Preparation of Silver Silicate and Titanium Dioxide Tetrahedral Nanorod Composite Catalyst

[0023] Solution A was prepared by adding 0.495 g of sodium metasilicate and 1 g of titanium dioxide nanotubes into 15 mL of deionized water at room temperature. Add 0.85g of silver nitrate solution into 15mL of deionized water to prepare solution B; then add solution B to solution A drop by drop under stirring, continue stirring for 10min, seal the reaction vessel, keep the temperature at 160°C for 20h, and cool After reaching room temperature, it was washed with water, centrifuged, and dried at 60° C. for 12 hours to prepare a silver silicate and titanium dioxide tetrahedral nanorod heterojunction composite catalyst.

Embodiment 2

[0025] Photocatalytic Oxidation of Benzyl Alcohol to Benzaldehyde

[0026] Photocatalytic oxidation of alcohols to aldehydes was carried out in a photoreactor. Before the reaction, add 30mL of acetonitrile, 30μL of o-xylene, 20-40μL of benzyl alcohol, and 50mg of catalyst to the kettle in sequence. After stirring evenly, feed oxygen to a pressure of 0.5Mpa. Under light conditions, control the reaction temperature at 40- 80°C, after 0-7h of reaction. The stock solution and the reaction solution were detected by gas chromatography, and the conversion rate of benzyl alcohol and the selectivity of benzaldehyde were calculated.

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Abstract

The invention relates to a silver silicate and titanium dioxide four-side nanorod composite catalyst, and belongs to the technical field of nano composite materials and photocatalysis. The invention relates to a silver silicate and titanium dioxide four-side nanorod composite catalyst, which is characterized in that a titanium dioxide nanotube is used as a carrier, and a silver silicate and titanium dioxide four-side nanorod heterojunction composite catalyst is synthesized by adopting a one-step hydrothermal method; silver silicate nanoparticles are deposited on four (100) exposed crystal faces of titanium dioxide, and the four (100) exposed crystal faces of titanium dioxide are tightly combined with (-116) crystal faces of silver silicate respectively to construct a heterogeneous interface.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials and photocatalysis, and in particular relates to a silver silicate and titanium dioxide tetrahedral nanorod composite catalyst. Background technique [0002] Aldehyde is an important chemical product. At present, the process of synthesizing aldehydes is relatively complex, and there are problems such as the use of dangerous and corrosive reagents, and environmental pollution. Photocatalytic oxidation of alcohols to aldehydes is a green, environmentally friendly, energy-efficient synthesis route. Titanium dioxide photocatalyst has excellent photocatalytic oxidation performance, however, because titanium dioxide has a relatively wide energy band and mainly absorbs ultraviolet light, the utilization rate of solar energy is very low. Silver silicate has a small energy band and can absorb visible light well. Therefore, combining silver silicate and titanium dioxide to form a heterojun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/50B01J35/00B01J37/10C07C45/29C07C47/54
CPCB01J23/50B01J21/063B01J37/10C07C45/29B01J35/39C07C47/54Y02P20/584
Inventor 史全全李金梅巩霞平贵臣
Owner INNER MONGOLIA AGRICULTURAL UNIVERSITY