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a kind of ceo 2 /tio 2 Nanocomposite hollow sphere catalyst and preparation method thereof

A nano-composite, hollow sphere technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem that ceria cannot meet high-temperature applications, etc. Effects of excellent light capture efficiency, mild reaction conditions, and excellent oxygen storage and release capacity

Inactive Publication Date: 2016-12-07
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the excellent oxygen storage performance of ceria is related to its thermal resistance, low-temperature reactivity and structural stability, and these influencing factors make ceria unable to meet the requirements of high-temperature applications.

Method used

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  • a kind of ceo <sub>2</sub> /tio <sub>2</sub> Nanocomposite hollow sphere catalyst and preparation method thereof
  • a kind of ceo <sub>2</sub> /tio <sub>2</sub> Nanocomposite hollow sphere catalyst and preparation method thereof
  • a kind of ceo <sub>2</sub> /tio <sub>2</sub> Nanocomposite hollow sphere catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] a CeO 2 / TiO 2 Nanocomposite hollow sphere catalysts, that is, first use polystyrene as a template, use tetrabutyl titanate and cerium nitrate hexahydrate as wall materials, and prepare CeO by combining sol-gel method and precipitation method 2 / TiO 2 Composite microspheres coated with polystyrene and then calcined to obtain CeO 2 / TiO 2 Nanocomposite hollow microsphere catalyst;

[0034] Among them, the amount of polystyrene, tetrabutyl titanate and cerium nitrate hexahydrate, according to polystyrene: tetrabutyl titanate: cerium nitrate hexahydrate is 0.1g: 0.2 × 10 -3 mol:1×10 -3 mol.

[0035] CeO above 2 / TiO 2 The preparation method of nanocomposite hollow sphere catalyst specifically comprises the following steps:

[0036] (1) Mix 0.1g polystyrene, 0.5g deionized water, 50μL concentrated ammonia water and 20mL absolute ethanol evenly, then control the temperature at 60°C and the rotation speed at 300r / min for 2 hours to obtain the reaction solution 1;

...

Embodiment 2

[0045] a CeO 2 / TiO 2 Nanocomposite hollow sphere catalysts, that is, first use polystyrene as a template, use tetrabutyl titanate and cerium nitrate hexahydrate as wall materials, and prepare CeO by combining sol-gel method and precipitation method 2 / TiO 2 Composite microspheres coated with polystyrene and then calcined to obtain CeO 2 / TiO 2 Nanocomposite hollow sphere catalyst;

[0046] Among them, the amount of polystyrene, tetrabutyl titanate and cerium nitrate hexahydrate, according to polystyrene: tetrabutyl titanate: cerium nitrate hexahydrate is 0.3g: 8 × 10 -3 mol:4×10 -3 mol.

[0047] CeO above 2 / TiO 2 The preparation method of nanocomposite hollow sphere catalyst specifically comprises the following steps:

[0048] (1) Mix 0.3g polystyrene, 2g deionized water, 10μL concentrated ammonia water and 20mL absolute ethanol evenly, control the temperature at 70°C, and react at a speed of 400r / min for 4 hours to obtain the reaction solution 1;

[0049] The part...

Embodiment 3

[0057] a CeO 2 / TiO 2 Nanocomposite hollow sphere catalysts, that is, first use polystyrene as a template, use tetrabutyl titanate and cerium nitrate hexahydrate as wall materials, and prepare CeO by combining sol-gel method and precipitation method 2 / TiO 2 Composite microspheres coated with polystyrene and then calcined to obtain CeO 2 / TiO 2 Nanocomposite hollow sphere catalyst;

[0058] Among them, the amount of polystyrene, tetrabutyl titanate and cerium nitrate hexahydrate is 0.2g according to polystyrene: tetrabutyl titanate: cerium nitrate hexahydrate: 4×10 -3 mol: 6×10 -3 mol.

[0059] CeO above 2 / TiO 2 The preparation method of nanocomposite hollow sphere catalyst specifically comprises the following steps:

[0060] (1) Mix 0.2g polystyrene, 1g deionized water, 30μL concentrated ammonia water and 20mL absolute ethanol evenly, control the temperature at 75°C, and react at a speed of 500r / min for 3 hours to obtain the reaction solution 1;

[0061] The partic...

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Abstract

The invention discloses a CeO2 / TiO2 nanometer composite hollow sphere catalyst and a preparation method thereof. The CeO2 / TiO2 nanometer composite hollow sphere catalyst is prepared by firstly preparing CeO2 / TiO2 coated polystyrene composite microspheres by using polystyrene as a template, and using tetrabutyl titanate and cerium nitrate hexahydrate as wall materials, and through combination of a sol-gel method with a precipitation method, and then performing calcination to obtain the product, wherein the using amount ratio of polystyrene, tetrabutyl titanate and cerium nitrate hexahydrate is 0.1-0.3g:0.2-8*10<-3>mol:1-6*10<-3>mol. The CeO2 / TiO2 nanometer composite hollow sphere catalyst prepared in the invention is uniform in size, good in photocatalysis, and good in thermal stability.

Description

technical field [0001] The invention relates to an inorganic composite hollow sphere catalyst and a preparation method thereof, in particular to a CeO with controllable particle size 2 / TiO 2 Nano composite hollow sphere catalyst and preparation method thereof. Background technique [0002] TiO 2 It is a photocatalyst and environmental catalyst with good thermal stability, strong oxidation ability, cheap and easy to get. TiO with hollow structure 2 Due to the structural characteristics of low density, large specific surface area, good surface permeability, high light harvesting rate and TiO 2 It is widely used in the field of photocatalysis due to its own characteristics. However TiO 2 It can only absorb ultraviolet light with a wavelength less than 387nm, which has low utilization rate of solar energy, and TiO 2 The recombination rate of photogenerated carriers is high and the quantum efficiency is low, which limits the TiO 2 Practical applications of hollow microsp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10B01J35/08
Inventor 胡静田婷邓维钧
Owner SHANGHAI INST OF TECH
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