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Carbon nitride composite material and preparation method and application thereof in artificial photosynthesis

A technology of composite materials and carbonitrides, applied in the preparation of organic compounds, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of rapid recombination with poor conductivity and low NADH production activity , limited light absorption and other issues, to achieve the effect of improving electron transmission efficiency, improving efficiency and selectivity, and simple preparation method

Pending Publication Date: 2021-11-19
SUZHOU UNIV OF SCI & TECH
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Problems solved by technology

However, due to limited visible light absorption, rapid reorganization of light-generating carriers and / or poor conductivity, pristine g-C 3 N 4 The production activity of NADH is not high enough to satisfy the subsequent reduction of CO by formate dehydrogenase (FDH). 2 needs

Method used

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  • Carbon nitride composite material and preparation method and application thereof in artificial photosynthesis
  • Carbon nitride composite material and preparation method and application thereof in artificial photosynthesis
  • Carbon nitride composite material and preparation method and application thereof in artificial photosynthesis

Examples

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Embodiment 1

[0043] 1. Preparation of graphitic carbon nitride nanosheets

[0044] Add 5g of dicyandiamide into a crucible, wrap it with aluminum foil, put it into a muffle furnace, set the program to raise the temperature from 20°C to 550°C at a rate of 2.5°C / min, keep it warm for 4 hours, and then cool down naturally to obtain blocks graphitic carbon nitride. Grind the product into powder and spread 4g on a 10×10cm aluminum foil paper, put it into a muffle furnace, set the program to raise the temperature from 20°C to 550°C at a rate of 5°C / min, keep it warm for 2 hours and then cool it down naturally. Graphite phase carbon nitride nanosheets were obtained.

[0045] figure 1 and figure 2 The SEM images and TEM images of graphite-phase carbon nitride nanosheets are respectively. It can be observed from the pictures that the prepared graphite-phase carbon nitride is uniform in size and presents a thin sheet-like structure.

[0046] 2. Preparation of Phthalate Diimide / Graphite Carbon N...

Embodiment 2

[0051] Mix 10 mg of the phthalic acid diimide / graphite-phase carbon nitride composite material prepared in Example 1 with 10 mL of reaction solution (phosphate buffer solution with pH=8, 15% wt triethanolamine, 1 mM NAD + , 0.25mM[Cp*Rh(bpy)(H 2 O)] 2+ ) into a photocatalytic reactor, wrapped in tin foil at 25°C to avoid light and stirred for half an hour, then turned on the xenon light source to start the photocatalytic reaction to reduce NADH.

[0052] Then 10 mg of the phthalic acid diimide / graphite-phase carbon nitride composite material prepared in Example 1 was mixed with 10 mL of reaction solution (phosphate buffer solution of pH=7.4, 15% wt triethanolamine, 0.1 mM NAD + , 3U formate dehydrogenase, 50mM NaHCO 3 , 0.25mM[Cp*Rh(bpy)(H 2 O)] 2+ ) into the photocatalytic reactor after being mixed evenly, wrapped in tin foil at 25°C to avoid light and stirred for one and a half hours, then turned on the xenon lamp light source to start the photocatalytic reaction to redu...

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Abstract

The invention relates to a carbon nitride composite material and a preparation method and application thereof in photosynthesis, and belongs to the technical field of environment and new energy materials. calcining a carbon-nitrogen compound twice to generate a graphite-phase carbon nitride nanosheet; and fully grinding the graphite-phase carbon nitride nanosheet and diimine pyromellitic acid, and calcining in inert gas to generate the diimine pyromellitic acid / graphite-phase carbon nitride composite material. The diimine phthalate / graphite-phase carbon nitride composite material disclosed by the invention is combined with the biological enzyme, and due to excellent visible light responsiveness, high carrier mobility, relatively high visible light utilization efficiency and specificity of the biological enzyme, the efficiency of catalytic production of formic acid is high, the product selectivity is good, and the material has a wide application prospect in the aspect of producing clean energy in artificial photosynthesis.

Description

technical field [0001] The invention relates to the technical field of environment and new energy materials, in particular to a carbon nitride composite material and its preparation method and its application in artificial photosynthesis. Background technique [0002] carbon dioxide (CO 2 ) as one of the main components of greenhouse gases, it causes serious environmental problems such as global warming, melting glaciers and rising sea levels. In addition, the current global average daily concentration of carbon dioxide has exceeded 400ppm. Therefore, how to effectively and timely deal with carbon dioxide is a very difficult problem and a huge challenge. "CO 2 Peak” and “Carbon Neutral” are CO 2 The two key points of the paper illustrate the importance of "green and low carbon". Inspired by the natural photosynthesis of green plants, researchers are committed to converting CO 2 Fixed in fuel (such as methane, methanol, ethanol, etc.) or high value-added products such as...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J27/24C07C51/00C07C51/15C07C53/02C12P7/40
CPCB01J31/0271B01J31/0247B01J27/24C07C51/00C07C51/15C12P7/40B01J2231/625B01J35/39C07C53/02
Inventor 胡俊蝶张鹏业李长明
Owner SUZHOU UNIV OF SCI & TECH
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