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Cerium oxide/titanium dioxide nano belt surface heterostructure photocatalyst with capture-catalysis performance and preparation method thereof

A technology of titanium dioxide and photocatalyst, which is applied in the field of photocatalytic materials and their surface modification, to achieve the effect of improving capture, improving utilization rate, and easily capturing pollutant molecules

Active Publication Date: 2014-12-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, the preparation and photocatalytic application of heterostructure photocatalysts on the surface of ceria / titania nanobelts have not been reported.

Method used

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  • Cerium oxide/titanium dioxide nano belt surface heterostructure photocatalyst with capture-catalysis performance and preparation method thereof
  • Cerium oxide/titanium dioxide nano belt surface heterostructure photocatalyst with capture-catalysis performance and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Mix cerium nitrate and titanium dioxide nanobelts with a molar ratio of 1:10, fully dissolve in deionized water to form a transparent solution, add ammonia water dropwise to the transparent solution, adjust the pH value of the solution to 10, and magnetically stir for 1 hour, and then The stirred solution was placed in a hydrothermal reaction kettle and reacted for 48 hours at 100° C., filtered the reacted solution, washed the generated precipitate with deionized water, and then separated the separated precipitate at 80° C. for 12 hours. The precipitate after the heat preservation treatment was annealed at 550°C for 2 hours to obtain a cerium oxide / titania nanobelt surface heterogeneous structure photocatalyst with capture-catalysis properties, wherein the width of the titanium dioxide nanobelt was 50-200nm, The thickness is 20-40nm, and the diameter of the cerium oxide nanoparticles grown in liquid phase on the titania nanobelt is 6±2nm.

Embodiment 2

[0020] Mix cerium nitrate and titanium dioxide nanobelts with a molar ratio of 2:10, fully dissolve in deionized water to form a transparent solution, add ammonia water dropwise to the transparent solution, adjust the pH value of the solution to 10, and magnetically stir for 1 hour, and then The stirred solution was placed in a hydrothermal reaction kettle and reacted for 48 hours at 100° C., filtered the reacted solution, washed the generated precipitate with deionized water, and then separated the separated precipitate at 80° C. for 12 hours. The precipitate after the heat preservation treatment was annealed at 550°C for 2 hours to obtain a cerium oxide / titania nanobelt surface heterogeneous structure photocatalyst with capture-catalysis properties, wherein the width of the titanium dioxide nanobelt was 50-200nm, The thickness is 20-40nm, and the diameter of the cerium oxide nanoparticles grown in liquid phase on the titania nanobelt is 6±2nm.

[0021] The TEM, HRTEM, and se...

Embodiment 3

[0023] Mix cerium nitrate and titanium dioxide nanobelts with a molar ratio of 1:1, fully dissolve them in deionized water to form a transparent solution, add ammonia water dropwise to the transparent solution, adjust the pH value of the solution to 10, and magnetically stir for 1 hour, then place The stirred solution was placed in a hydrothermal reaction kettle and reacted for 48 hours at 100° C., filtered the reacted solution, washed the generated precipitate with deionized water, and then separated the separated precipitate at 80° C. for 12 hours. The precipitate after the heat preservation treatment was annealed at 550°C for 2 hours to obtain a cerium oxide / titania nanobelt surface heterogeneous structure photocatalyst with capture-catalysis properties, wherein the width of the titanium dioxide nanobelt was 50-200nm, The thickness is 20-40nm, and the diameter of the cerium oxide nanoparticles grown in liquid phase on the titania nanobelt is 6±2nm.

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Abstract

The invention discloses a cerium oxide / titanium dioxide nano belt surface heterostructure photocatalyst with capture-catalysis performance and preparation method thereof, wherein, the catalyst is composed of a titanium dioxide nano belt and a cerium oxide nano particle grown on the titanium dioxide nano belt in liquid phase, and the width of the titanium dioxide nano belt is 50-200 nm, and the thickness is 20-40 nm, and the diameter of the cerium oxide nano particle is 6 plus or minus 2 nm; the photocatalyst is prepared by coprecipitation and hydrothermal method. The invention has the advantages of simple process and low cost, and the obtained photocatalyst material has a larger specific surface area for easily capturing pollutant molecules, thereby substantially inhibiting composite of the photoproduction electronic cavity and improving the UV visible photocatalysis performance of the material.

Description

technical field [0001] The invention relates to a photocatalytic material and a surface modification method thereof, in particular to a cerium oxide / titania nanobelt surface heterogeneous structure photocatalyst with capture-catalysis performance and a preparation method of the catalyst, belonging to photocatalytic materials and their surface modification methods. Technical field of preparation. Background technique [0002] In today's increasingly serious global environmental pollution, how to effectively control environmental pollution has attracted widespread attention from all over the world. As a high-efficiency photocatalyst with stable performance, titanium dioxide has the advantages of low price, stable chemical properties, non-toxic and non-corrosive, making it one of the most in-depth and extensive research semiconductor materials. However, there are difficulties in the separation and recovery of powdered nano-titanium dioxide during use, which limits the practica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10
Inventor 刘宏田健桑元华郝品赵振环王兴琪陈少伟
Owner SHANDONG UNIV
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