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Light conversion enhanced photocatalysis composite material and preparation method thereof

A composite material and photocatalytic technology, which is applied in the field of light conversion enhanced photocatalytic composite material and its preparation, to achieve high stability, stable performance, and high photon conversion efficiency

Active Publication Date: 2011-05-18
NANJING UNIV OF TECH
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  • Application Information

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Problems solved by technology

So far, this new type of photocatalytic composite material integrating photoconversion and photocatalysis has not been reported.

Method used

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  • Light conversion enhanced photocatalysis composite material and preparation method thereof
  • Light conversion enhanced photocatalysis composite material and preparation method thereof

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Embodiment Construction

[0020] 1. (1) will be doped with 2mol% Yb 3+ and 0.1mol% Tm 3+ A transparent rare earth silicate glass rod (commercially available, 3.0 mm in diameter, such as figure 1 Shown in part 1 of ) in absolute ethanol solution to wash 2 times to remove surface impurities. (2) Ta with a purity of 99.99% 2 o 5As the raw material of the photocatalytic film layer, a certain thickness of Ta was deposited on the surface of the glass rod by radio frequency magnetron sputtering. 2 o 5 Nano-membrane, the thickness of the nano-membrane is controlled to be about 450 nanometers. (3) Deposit Ta on the surface 2 o 5 The transparent rare earth silicon hydrochloric acid glass rod with nano-film layer is placed in an atmosphere furnace with ammonia gas (20mL / min), and treated at 800°C for 15 hours, which can make Ta 2 o 5 The film is transformed into a TaON film. (4) the transparent rare earth silica hydrochloric acid glass rod that the surface is coated with TaON nanofilm is in the H of 5% ...

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Abstract

The invention provides a light conversion enhanced photocatalysis composite material and a preparation method thereof. The light conversion enhanced photocatalysis composite material is prepared according to the main principle that: a photocatalysis film layer is further compounded on the surface of a transparent infrared conversion core layer by adopting a physical-chemical method, the photocatalysis response spectral intensity of the photocatalysis material is remarkably enhanced by utilizing the control function of a transparent infrared conversion light film layer to the solar incident light spectrum energy distribution and an efficiency coupling energy transfer function between the transparent infrared conversion light film layer and the photocatalysis film layer, and the photon conversion efficiency and the solar utilization efficiency of the photocatalysis material are improved. The novel light conversion enhanced photocatalysis composite material has the advantages of compact structure, stable property, high photon conversion efficiency and the like, can adapt to different solar illumination conditions, can be used for fully converting and utilizing solar energy, and has potential application to the fields of direct catalysis decomposition on pure water to produce hydrogen by solar light, photocatalytic degradation to organic pollutants, organism photosynthesis and thelike.

Description

Technical field: [0001] The invention relates to a photocatalytic composite material with enhanced light conversion and a preparation method thereof, in particular to a method for enhancing the optimal spectral response intensity of photocatalytic materials by using infrared spectrum conversion and efficient coupling energy transfer, and obtaining excellent photon conversion efficiency and Novel photocatalytic composites for solar energy utilization. Background technique: [0002] In solving the global energy and environmental crisis, the use of abundant natural solar photocatalytic hydrogen production as a sustainable new energy approach is increasingly attracting the attention of the international community. Solar photocatalytic hydrogen production materials and technologies have become One of the current research hotspots and priorities in the field of new energy technology. [0003] Solar photocatalytic hydrogen production mainly includes several ways such as solar phot...

Claims

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Application Information

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IPC IPC(8): H01L31/0264B01J27/24B01J23/652B01J23/648C01B3/02
CPCY02P20/133
Inventor 陆春华倪亚茹黄文娟丁明烨张其土许仲梓
Owner NANJING UNIV OF TECH
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