Preparation method and application of molybdenum disulfide/boron-doped graphite-phase carbon nitride composite visible light photocatalyst

A graphite-phase carbon nitride and molybdenum disulfide technology, applied in physical/chemical process catalysts, chemical instruments and methods, hydrogen/synthesis gas production, etc., can solve application limitations, low efficiency of photocatalytic water splitting, and charge separation efficiency Low-level problems, to achieve the effect of low cost, less impurities, and complete reaction

Pending Publication Date: 2021-02-02
NANCHANG HANGKONG UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the rapid recombination of electron-hole pairs in boron-doped graphitic carbon nitride, the charge separation efficiency is low, resulting in low photocatalytic water splitting efficiency, which limits its application to a certain extent.

Method used

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  • Preparation method and application of molybdenum disulfide/boron-doped graphite-phase carbon nitride composite visible light photocatalyst
  • Preparation method and application of molybdenum disulfide/boron-doped graphite-phase carbon nitride composite visible light photocatalyst

Examples

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Effect test

example 1

[0019] Step 1: Prepare boron-doped graphite phase carbon nitride powder: weigh 20 g urea, 12 mg PH 4 BNa and 30 mL of water. Put the weighed medicine into a beaker, put it into an ultrasonic disperser and sonicate it for 30 min, then move it to a magnetic stirrer, adjust to a suitable position, and stir at room temperature for 30 min. Then heated in a constant temperature water bath set at 80 °C for 3 h, and evaporated to dryness to obtain a white powder. Put the white powder in a muffle furnace, raise the temperature to 520 °C, set the heating rate to 5 °C / min, and maintain this temperature for 2 h for sintering to obtain boron-doped graphite phase carbon nitride powder.

[0020] Step 2: Prepare molybdenum disulfide powder: 5.3142 g (NH 4 ) 6 Mo 7 o 24 4H 2 O and 9.8195 g of thiourea were vigorously stirred in 150 ml of distilled water. After the formation of a homogeneous solution, it was transferred to a 100 ml hydrothermal kettle and kept at 180°C for 24 hours, and ...

example 2

[0022] Example 2: The difference from Example 1 is that molybdenum disulfide is not added, and a boron-doped graphite phase carbon nitride catalyst sample is prepared.

[0023] figure 1 For the photocatalytic hydrogen production average rate figure of the photocatalyst that example 1 and example 2 obtain, figure 2 It is example 1 and the XRD spectrum of molybdenum disulfide, as can be seen from the figure, the present invention obviously improves the hydrogen production of boron-doped graphite phase carbon nitride material through the composite of boron-doped graphite phase carbon nitride and molybdenum disulfide s efficiency.

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Abstract

The invention discloses a preparation method and application of a molybdenum disulfide / boron-doped graphite-phase carbon nitride composite visible light photocatalyst, wherein boron-doped graphite-phase carbon nitride is prepared by reacting and sintering urea and sodium tetraphenylborate (PH4BNa), and molybdenum disulfide is prepared by a hydrothermal method. According to the invention, boron-doped graphite-phase carbon nitride photocatalyst is compounded with proper molybdenum disulfide to prepare an efficient catalyst, wherein the boron-doped graphite-phase carbon nitride has high specificsurface area and chemical stability, and molybdenum disulfide can accelerate separation of photo-excited electron hole pairs in boron-doped graphite-phase carbon nitride, so that excellent catalytic activity is achieved, the photocatalytic hydrogen production efficiency of the molybdenum disulfide / boron-doped graphite-phase carbon nitride photocatalyst is improved, and the photocatalyst has potential application value in the aspect of coping with energy crisis.

Description

technical field [0001] The invention relates to the field of new energy technology, in particular to a method for preparing a molybdenum disulfide / boron-doped graphite phase carbon nitride composite visible light catalyst and its application in the field of photocatalytic hydrogen production. Background technique [0002] Energy shortage and environmental degradation are serious problems that have plagued people for a long time. In the process of exploring these problems, the role of photocatalytic technology cannot be ignored. Solar energy is abundant and cheap, but the energy is widely distributed and difficult to store. Photocatalytic materials have the characteristics of non-toxicity, good thermal and chemical stability, etc., and the photocatalytic activity of photocatalytic materials is high, which can improve the utilization rate of solar energy. Therefore, photocatalytic materials are widely used in the use of solar energy to deal with environmental problems, degrad...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04
CPCB01J27/24C01B3/042C01B2203/0277B01J35/39Y02E60/36
Inventor 罗一丹王勇虎薛名山谢宇殷祚炷洪珍谢婵陈亮
Owner NANCHANG HANGKONG UNIVERSITY
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