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Dual-channel Z-configuration photocatalytic decomposition water composite material and preparation method thereof

A composite material and photocatalytic technology, applied in the field of photocatalytic water splitting materials, can solve the problems of weak response in the visible light range, slow charge separation and migration, poor material composite uniformity, etc., to achieve good cycle stability, accelerated transfer, and energy saving. The effect of environmental performance

Inactive Publication Date: 2018-09-04
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the disadvantages of weak response in the visible light range, slow charge separation and migration, and the use of ionic electron transport media in the traditional Z-configuration photocatalytic composite system, which is prone to side reactions and poor material composite uniformity in the preparation of composite catalysts by conventional methods

Method used

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  • Dual-channel Z-configuration photocatalytic decomposition water composite material and preparation method thereof
  • Dual-channel Z-configuration photocatalytic decomposition water composite material and preparation method thereof
  • Dual-channel Z-configuration photocatalytic decomposition water composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Weigh 10 mg of prepared carbon nitride, and ultrasonically disperse it uniformly to obtain a carbon nitride dispersion; weigh 9 mmol AgNO 3 Dissolve it in 10 mL of deionized water to obtain 10 mL of AgNO with a concentration of 0.9 mol / L 3 solution; 10 mL of AgNO with a concentration of 0.9 mol / L was stirred 3 The solution was added dropwise into the carbon nitride dispersion, and stirred for 2 hours to obtain a mixed precursor solution. Weigh 10 mg of molybdenum disulfide powder, dissolve it in 50 mL of deionized water and sonicate for 3 hours, so that the molybdenum disulfide layers are fully peeled off to obtain a flaky molybdenum disulfide dispersion. Add the molybdenum disulfide ultrasonic stripping solution dropwise into the above-prepared solution and stir rapidly for 2 hours to obtain a precursor solution; press AgNO 3 with Na 3 PO 4 12H 2 O molar ratio is the ratio of 3:1, takes by weighing 0.3mmol sodium phosphate and is dissolved in 10ml deionized water,...

Embodiment 2

[0036] Weigh 20 mg of prepared carbon nitride, and ultrasonically disperse to obtain a carbon nitride dispersion; weigh 9 mmol AgNO 3 Dissolve it in 10 mL of deionized water to obtain 10 mL of AgNO with a concentration of 0.9 mol / L 3 solution; 10 mL of AgNO with a concentration of 0.9 mol / L was stirred 3 The solution was added dropwise into the carbon nitride dispersion, and stirred for 2 hours to obtain a mixed precursor solution. Weigh 10 mg of molybdenum disulfide powder, dissolve it in 50 mL of deionized water and sonicate for 3 hours, so that the molybdenum disulfide layers are fully peeled off to obtain a flaky molybdenum disulfide dispersion. Add the molybdenum disulfide ultrasonic stripping solution dropwise into the above-prepared solution and stir rapidly for 2 hours to obtain a precursor solution; press AgNO 3 with Na 3 PO 4 12H 2 O molar ratio is the ratio of 3:1, takes by weighing 0.3mmol sodium phosphate and is dissolved in 10ml deionized water, obtains the ...

Embodiment 3

[0038] Weigh 50mg of prepared carbon nitride, and ultrasonically disperse evenly to obtain a carbon nitride dispersion; weigh 9mmol AgNO 3 Dissolve it in 10 mL of deionized water to obtain 10 mL of AgNO with a concentration of 0.9 mol / L 3 solution; 10 mL of AgNO with a concentration of 0.9 mol / L was stirred 3 The solution was added dropwise into the carbon nitride dispersion, and stirred for 2 hours to obtain a mixed precursor solution. Weigh 10 mg of molybdenum disulfide powder, dissolve it in 50 mL of deionized water and sonicate for 3 hours, so that the molybdenum disulfide layers are fully peeled off to obtain a flaky molybdenum disulfide dispersion. Add the molybdenum disulfide ultrasonic stripping solution dropwise into the above-prepared solution and stir rapidly for 2 hours to obtain a precursor solution; press AgNO 3 with Na 3 PO 4 12H 2 O molar ratio is the ratio of 3:1, takes by weighing 0.3mmol sodium phosphate and is dissolved in 10ml deionized water, obtains...

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Abstract

The invention relates to photocatalytic decomposition water materials and in particular relates to a dual-channel Z-configuration photocatalytic decomposition water composite material and a preparation method thereof. The preparation method disclosed by the invention comprises the following steps: with carbon nitride as a precursor material, adding sheet molybdenum disulfide to serve as a high-conductivity solid-state electron transport medium, enabling the two to perform effective assembly, and enabling nano-silver phosphate particles to uniformly grow on a composite matrix of carbon nitrideand sheet molybdenum disulfide by virtue of an ion exchange method, thereby obtaining a three-system composite material having the characteristics of being excellent visible light absorption, low in catalytic stability and high in photocatalytic efficiency. The defects that a composite catalyst prepared by a conventional method is weak in visible range response and slow in charge separation and migration and an ionic electron transport medium used in the traditional Z-configuration photocatalytic composite system easily causes side reactions and is low in material compounding uniformity are overcome.

Description

technical field [0001] The present invention relates to a photocatalytic water splitting material, in particular to a dual-channel Z-configuration photocatalytic water splitting composite material and its preparation method, especially to a technology prepared by using ion exchange method and ion electrostatic drive self-assembly in aqueous solution The invention discloses a method for photocatalytically decomposing composite materials in a Z configuration, which belongs to the technology of nanocomposite materials and photocatalytically decomposing water. Background technique [0002] Semiconductor photocatalysis can convert solar energy into chemical energy without secondary pollution. During the photocatalytic reaction, improving the separation of electron-hole pairs and the transport rate of photogenerated carriers is the key to improving the photocatalytic activity of semiconductors. At present, it is difficult for a single semiconductor material to meet many requiremen...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04
CPCC01B3/042B01J27/24C01B2203/0277B01J35/39Y02E60/36
Inventor 崔行凯田琳唐华杨小飞
Owner JIANGSU UNIV
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