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Artificial photosynthesis system and application thereof

A technology of artificial photosynthesis and artificial enzymes, applied in the field of photocatalysis, can solve the problems of low selectivity and complex photocatalytic products, achieve the effect of high methanol content, broaden the application, and increase the selectivity of methanol

Inactive Publication Date: 2016-07-06
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By doping graphene oxide with cerium oxide, the energy band structure of cerium oxide can be adjusted, the response to visible light can be increased, and the utilization rate of solar energy can be improved. However, the selectivity of photocatalytic reduction of carbon dioxide to methanol in the prior art is low, and the Catalytic products are complex

Method used

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  • Artificial photosynthesis system and application thereof
  • Artificial photosynthesis system and application thereof
  • Artificial photosynthesis system and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) Preparation of melamine azacerium oxide: the CeCl 3 ·7H 2 O (1.0000g, 0.0.0027mol) was dissolved in 20mL of distilled water and magnetically stirred until dissolved, and then NaOH solution (1.0mol / L, 10mL) was used to adjust the pH of the mixed solution to >10 and magnetically stirred until the precipitate was bright yellow to obtain mixed solution A. (NH 2 ) 3 C 3 N 3 (1.0000g, 99%) was dissolved in NaOH solution (0.1mol / L, 10mL) and dispersed in ultrasonic for 2h to obtain mixed solution B. Add the mixed solution B dropwise to the mixed solution A under magnetic stirring for 30 minutes, and ultrasonically for 3 hours to prepare a composite solution. Then add the composite liquid solution into a 100ml hydrothermal reaction kettle, place it under the condition of 180°C for 6h, filter, wash, and dry in a vacuum oven (50°C, 6h) to obtain cerium nitrogen oxide (CeO 2 -g -C 3 N 4 ).

[0045](2) Loading of artificial enzymes: the CuSO 4 ·5H 2 O (0.2000g, 0.000...

Embodiment 2

[0048] (1) Preparation of melamine azacerium oxide: the CeCl 3 ·7H 2 O (1.0000g, 0.0.0027mol) was dissolved in 20mL distilled water and magnetically stirred until dissolved, and then NaOH solution (1.0mol / L, 10mL) was used to adjust the pH value of the mixed solution to >10 and magnetically stirred until the precipitate was bright yellow to obtain mixed solution A. (NH 2 ) 3 C 3 N 3 (1.0000g, 99%) was dissolved in NaOH solution (0.1mol / L, 10mL) and dispersed in ultrasonic for 2h to obtain mixed solution B. Add the mixed solution B dropwise to the mixed solution A under magnetic stirring for 30 minutes, and ultrasonically for 3 hours to prepare a composite solution. Then add the composite liquid solution into a 100ml hydrothermal reaction kettle, place it under the condition of 180°C for 6h, filter, wash, and dry in a vacuum oven (50°C, 6h) to obtain cerium nitrogen oxide (CeO 2 -g -C 3 N 4 ).

[0049] (2) Loading of artificial enzymes: the NiSO 4 (0.2000g, 0.0008mol)...

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Abstract

The invention discloses an artificial photosynthesis system and an application thereof. The artificial photosynthesis system comprises an artificial enzyme carrier, a light capture agent and an artificial enzyme, wherein the artificial enzyme comprises a coordination compound formed by metal ions and more than two nitrogen-atoms in melamine molecule in the artificial enzyme carrier. The artificial photosynthesis system contains 0.5-6wt% of melamine. The artificial photosynthesis system provided by the invention takes the melamine as the photosensitizer and the artificial enzyme carrier and the coordination compound formed between metal ions and nitrogen-atoms as the artificial enzyme, so that the selectivity of the photocatalytic reduction products to methyl alcohol is increased. The artificial photosynthesis system provided by the invention puts forward taking the semiconductor material ceric oxide coupling metal complex as the artificial enzyme for constructing a theoretical model for the artificial photosynthesis system, so that the applications of the semiconductor material CeO2 and melamine in the photocatalysis field are widened, the photocatalyst preparation process according to the invention is simple and the raw materials are low-cost and easily acquired.

Description

technical field [0001] The invention relates to the construction and application of an artificial photosynthesis system, belonging to the technical field of photocatalysis. Background technique [0002] Solar energy is a green energy that does not pollute the environment. At normal temperature and pressure, CO 2 Photocatalytic reduction to HCOOH, CH 3 Organic matter such as OH has opened up a new way to utilize solar energy. TiO 2 Photocatalytic reduction of CO 2 There is no selectivity for the reduction product, and it is generally a mixture of several compounds such as carbon monoxide and methane, and its yield is low, and TiO 2 Visible light in solar energy cannot be effectively utilized. Especially gaseous substances are neither convenient for storage nor application. Therefore, the photocatalytic reduction of carbon dioxide to fuel molecules that are liquid at room temperature and pressure has more practical application value. [0003] Cerium oxide is a light rar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J31/22C07C29/159C07C31/04
CPCC07C29/159B01J31/1815B01J31/26B01J2531/847B01J2531/16B01J2231/62B01J35/39C07C31/04Y02P20/52
Inventor 刘守清周姗姗
Owner SUZHOU UNIV OF SCI & TECH
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