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Hollow sphere photocatalyst as well as preparation method and application thereof

A photocatalyst and hollow sphere technology, applied in the field of photocatalysis, can solve problems such as high photogenerated carrier recombination rate, and achieve the effect of enhancing the capture ability, reducing the recombination probability and improving the photocatalytic performance.

Pending Publication Date: 2020-08-25
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hollow sphere catalysts still have a high recombination rate of photogenerated carriers
Therefore, it is still a major challenge to improve the photocatalytic performance of hollow sphere catalysts.

Method used

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  • Hollow sphere photocatalyst as well as preparation method and application thereof
  • Hollow sphere photocatalyst as well as preparation method and application thereof
  • Hollow sphere photocatalyst as well as preparation method and application thereof

Examples

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preparation example Construction

[0038] The present invention also provides a method for preparing the hollow sphere photocatalyst described in the above technical solution, comprising the following steps:

[0039] Depositing platinum ions on the surface of the spherical template to obtain a spherical template with platinum ions deposited on the surface;

[0040] After mixing the spherical template with platinum ions deposited on the surface, the alkaline solution and the titanium source solution, calcining to obtain a hollow sphere with Pt deposited on the inner surface;

[0041] The hollow sphere with Pt deposited on the inner surface is immersed in the source solution of the oxygen-promoting catalyst, and then calcined to obtain the hollow sphere photocatalyst.

[0042] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0043] The invention deposits platinum ions on the surface of the spherical tem...

Embodiment 1

[0077] Add 1.2 mL of formaldehyde solution with a concentration of 410 g / L dropwise to a phenolic solution containing a basic catalyst (20 mL of absolute ethanol, 40 mL of deionized water, 0.2 mL of ammonia water with a concentration of 550 g / L and 1 g of 3-aminophenol) , after stirring for 30 hours, heat up to 100°C at a rate of 3°C / min to carry out hydrothermal reaction for 24h, centrifuge the hydrothermal reaction product, wash and dry the solid to obtain a spherical phenolic resin, denoted as APF;

[0078] Under ultrasonic conditions, 100mgAPF was impregnated into 50mL of chloroplatinic acid solution with a concentration of 10mg / mL (3h), the impregnation system was centrifuged, and the solid was dried to obtain a phenolic resin with platinum ions deposited on the surface, denoted as Pt 4+ @APF;

[0079] 0.1g of the Pt 4+ @APF Ultrasonic Dispersion Sonicate in 20mL absolute ethanol ice-water bath to disperse, add 7mL acetonitrile and 0.15mL ammonia water with a mass concen...

Embodiment 2

[0083] Referring to the preparation method of Example 1, the only difference is that the calcination temperature is 600°C to obtain a hollow sphere photocatalyst, which is denoted as 2-Pt@TiO 2 @CoO x (Pt accounted for the TiO 2 The mass percentage of the hollow sphere matrix is ​​0.3%, CoO x accounts for the TiO 2 The mass percentage of the hollow sphere matrix is ​​1.5%, anatase).

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Abstract

The invention relates to the technical field of photocatalysis, in particular to a hollow sphere photocatalyst as well as a preparation method and application thereof. The hollow sphere photocatalystprovided by the invention comprises a hollow sphere substrate, Pt loaded on the inner surface of the hollow sphere substrate and an oxygen-assisting catalyst loaded on the outer surface of the hollowsphere; the hollow sphere substrate is made of titanium dioxide; and the oxygen-assisting catalyst is cobalt oxide, ruthenium oxide or manganese oxide. According to the record of the embodiment, whenthe hollow sphere photocatalyst provided by the invention is used for photocatalytic decomposition of water, the maximum hydrogen generation amount can reach 225 [mu] mol / h / g.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a hollow sphere photocatalyst and its preparation method and application. Background technique [0002] In today's world, energy shortage and environmental pollution are becoming more and more serious. Therefore, it is particularly urgent to explore a new green technology to solve the above-mentioned energy and environmental crisis. As we all know, solar energy is one of the most abundant, cleanest and most promising renewable energy sources in the world. Among them, semiconductor photocatalysis technology has attracted the attention of scholars at home and abroad. On the one hand, semiconductor photocatalysis technology can use solar energy to produce many valuable chemical fuels, such as hydrogen produced by photocatalytic cracking of water and hydrocarbons produced by carbon dioxide reduction. On the other hand, this technology can purify the environment by photocata...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J23/46B01J23/656B01J35/08B01J37/10B01J37/34B01J37/08B01J37/03C01B3/04
CPCB01J23/8913B01J23/462B01J23/6562B01J23/002B01J37/10B01J37/343B01J37/0018B01J37/031B01J37/088C01B3/042B01J35/398B01J35/51B01J35/39Y02E60/36
Inventor 张静朱鸿宇杨霞陈雪冰
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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