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High-efficiency hydrogen-production ZnO core-shell nanorod array photocatalyst, preparation method and application thereof

A nanorod array and photocatalyst technology, applied in the field of photocatalytic materials, can solve the problems of ZnO narrow light absorption range and low sunlight utilization rate, and achieve the effect of improving the hydrogen production activity of visible light

Active Publication Date: 2019-02-01
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: In order to solve the problems of narrow light absorption range of existing ZnO, low sunlight utilization rate and rapid recombination of semiconductor photogenerated electron holes, the present invention provides a highly efficient hydrogen-producing ZnO core-shell nanorod array photocatalyst

Method used

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  • High-efficiency hydrogen-production ZnO core-shell nanorod array photocatalyst, preparation method and application thereof
  • High-efficiency hydrogen-production ZnO core-shell nanorod array photocatalyst, preparation method and application thereof
  • High-efficiency hydrogen-production ZnO core-shell nanorod array photocatalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: The first step: ZnO powder and carbon powder with a purity of 99.99% are mixed and ground according to a mass ratio of 1:1, and filled into a ceramic boat; the sapphire substrate is cut into 1.5cm×1cm, followed by acetone , anhydrous ethanol, deionized water ultrasonic cleaning, and blow dry with nitrogen, as the growth substrate, and then put the closed end of a quartz tube with a length of 30 cm and a diameter of 3 cm, and place the cleaned sapphire substrate at a position 5 cm away from the tube mouth inside the quartz tube. Push the quartz tube as a whole into a horizontal tube furnace with a set temperature of 1050°C, close the tube furnace, evacuate, and feed argon gas flow rate of 150 sccm and oxygen flow rate of 15 sccm. After 30 minutes of reaction, ZnO nanorod arrays grow on sapphire surface;

[0026] The second step: using a magnetron sputtering apparatus to sputter a layer of WS in the ZnO nanorod array 2 thin film, with WS 2 The target materia...

Embodiment 2

[0029] Example 2: The method is the same as Example 1, except that the high temperature reaction time of the first step is 10 minutes, the sputtering time of the second step is 10 minutes, and the sputtering time of the third step is 10 minutes, and the obtained ZnO-WS 2 - The morphology of the CdS core-shell nanorod array is similar to that of Example 1.

Embodiment 3

[0030] Embodiment 3: The method is the same as in Embodiment 1, except that the high temperature reaction time of the first step is 15min, the sputtering time of the second step is 8min, the cavity volume is 1.5Pa, and the sputtering time of the third step is 15min, The cavity pressure is 1.5Pa, and the obtained ZnO-WS 2 - The morphology of the CdS core-shell nanorod array is similar to that of Example 1.

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Abstract

The invention discloses a high-efficiency hydrogen-production ZnO core-shell nanorod array photocatalyst. The high-efficiency hydrogen-production ZnO core-shell nanorod array photocatalyst comprises an insulation substrate, the ZnO nanorod arrays are distributed on the substrate, the ZnO nanorod arrays are composed of several ZnO nano rods; the outer layers of the ZnO nanorods are a WS2 films, which form a ZnO-WS2 composite system; the outer layers of the ZnO-WS2 composite system is loaded with CdS nanoparticles to form the ZnO-WS2-CdS core-shell nanorod arrays. The invention also provides a preparation method of the photocatalyst and an application of the photocatalyst for hydrogen production under visible light catalysis. The photocatalyst of the present invention has an effective electron transfer energy level, achieves rapid carrier separation, and increases hydrogen production activity.

Description

technical field [0001] The invention relates to a photocatalytic material, in particular to a highly efficient hydrogen-producing ZnO core-shell nanorod array photocatalyst, a preparation method and an application. Background technique [0002] Photocatalytic technology has always been considered as an effective technology to solve environmental and energy problems. Among them, photocatalytic hydrogen production technology uses solar energy to directly decompose water into clean hydrogen. Therefore, researchers are committed to developing efficient semiconductor photocatalysts. The research structure- Performance is a very important research direction. The one-dimensional ZnO structure has a high specific surface area, fast carrier transport path and excellent light absorption performance, and has attracted widespread attention, but at the same time, the ZnO wide bandgap can only absorb ultraviolet light and semiconductor photogenerated electrons that account for 5% of sunli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/047B01J37/34C01B3/04
CPCC01B3/042B01J27/047B01J37/342B01J35/398B01J35/397B01J35/39B01J35/23Y02E60/36
Inventor 徐春祥游道通石增良
Owner SOUTHEAST UNIV
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