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Z-type photocatalyst for photocatalytic hydrogen generation as well as preparation method and application of Z-type photocatalyst

A photocatalyst and photocatalytic technology, applied in the field of photocatalysis, can solve the problem of low activity of the photocatalytic system, achieve the effect of improving activity, increasing ratio and reducing quantity

Active Publication Date: 2019-01-04
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the aggregation of the same photocatalyst particles accounts for a large proportion, resulting in low activity of the entire photocatalytic system.

Method used

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  • Z-type photocatalyst for photocatalytic hydrogen generation as well as preparation method and application of Z-type photocatalyst
  • Z-type photocatalyst for photocatalytic hydrogen generation as well as preparation method and application of Z-type photocatalyst
  • Z-type photocatalyst for photocatalytic hydrogen generation as well as preparation method and application of Z-type photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 A kind of photocatalytic hydrogen production Z type photocatalyst Er 3+ :Y 3 Al 5 o 12 @Nb 2 o 5 / Pt / In 2 o 3

[0051] (1) Preparation method

[0052] 1. Preparation of Er 3+ :Y 3 Al 5 o 12 powder

[0053] Under stirring, 2.27g Y 2 o 3 and 0.01g Er 2 o 3 Dissolve in appropriate hot HNO 3 solution, get Y(NO 3 ) 3 and Er(NO 3 ) 3 mixed solution. Then, 12.62g Al(NO 3 ) 3 9H 2 O, and a homogeneous solution was obtained. After that, 33.93 g of solid citric acid was also added to the mixture solution. The solution was continued to be stirred and heated at 50-60 °C until a transparent sol was successfully formed. Subsequently, the sol was heated at 80 °C for 24 h and became a xerogel. After cooling the gel in air, it was ground into a homogeneous powder. The obtained precursor was calcined in a muffle furnace at 1100 °C for 2.0 h to remove residual organic components and nitrate ions. Finally, the sintered mass was allowed to cool to ...

Embodiment 2

[0087] Example 2 Er 3+ :Y 3 Al 5 o 12 @Nb 2 o 5 / Pt / In 2 o 3 Application in Photocatalytic Hydrogen Production

[0088] Experimental method: The photocatalytic hydrogen generation experiment was carried out in a 500mL Pyrex reactor system at a temperature of 25°C and a pressure of 101325Pa. In a typical photocatalytic reaction for a hydrogen generator, the prepared sample was placed in a photoreactor in an aqueous solution containing methanol under constant stirring. Prior to visible light irradiation, the reaction system was purged with argon for 30 minutes to remove dissolved air. The system was then illuminated with visible light for 4.0 hours through a cut-off filter from a 300 W Xe lamp (LX-300, Deruifeng Hardware Electric Enterprise, China), which wraps around the side of the photoreactor. The irradiation light wavelength is controlled by a combination of a chilled mirror (CM-1) and a water filter. For visible light illumination, fit a filter (L42) to the above...

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Abstract

The invention relates to a Z-type photocatalyst for photocatalytic hydrogen generation as well as a preparation method and an application of the Z-type photocatalyst. The novel composite photocatalystEr<3+>:Y3Al5O12@Nb2O5 / Pt / In2O3 is synthesized with a coating-demolding method, combination of photoinduced electrons and holes can be separated effectively, electron transfer can be accelerated by Ptas an electric passage, and Er<3+>:Y3Al5O12 can absorb visible light and convert visible light into ultraviolet light to activate Nb2O5 with broad-band gap. Er<3+>:Y3Al5O12@Nb2O5 / Pt / In2O3 has high activity of photocatalytic hydrogen generation when applied to photocatalytic hydrogen generation.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and in particular relates to a synthesis method of a novel photocatalyst and an application of the catalyst in photocatalytic hydrogen production. Background technique [0002] With the increase in population and the rapid development of the world economy, energy consumption will continue to increase, and the period of energy shortage will appear earlier. The large-scale development and utilization of traditional fossil fuels such as coal, oil and natural gas have led to the rapid reduction and consumption of these non-renewable energy carriers. Exploring green, efficient and sustainable alternative new energy carriers has become a hot topic for most researchers in the world. Due to high combustion value, no pollution and low carbon, hydrogen has brought new vitality to the energy field. On the one hand, solar energy is rich in resources, free to use, no transportation costs, and no pollution to t...

Claims

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Application Information

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IPC IPC(8): B01J23/648B01J37/02C01B3/04
CPCC01B3/042B01J23/002B01J23/6484B01J37/0215B01J2523/00B01J35/23B01J35/39B01J2523/31B01J2523/33B01J2523/36B01J2523/3775B01J2523/56Y02E60/36
Inventor 房大维张旭张朝红王君赵成吕梦瑶
Owner LIAONING UNIVERSITY