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According to a report by the Physicist Organization Network on July 18 (Beijing time), new studies conducted by the Korea Institute of Chemical Technology and Ewha Womans University in Seoul demonstrate that graphene as an efficient photocatalyst can increase the efficiency of artificial photosynthesis systems. It also demonstrated a benchmark example that can directly convert carbon dioxide into solar chemical or solar fuel. The study was published in the latest issue of the Journal of the American Chemical Society.
Artificial photosynthesis systems can convert solar light energy into chemical energy, producing renewable, non-polluting fuels and multiple-use chemicals. Developing an efficient solar fuel conversion process is very challenging. Although researchers have demonstrated the feasibility of artificial photosynthesis, achieving high efficiency is difficult. Previous attempts have been made to use graphene semiconductor composites as catalysts, but the efficiency is also low.
In the new study, scientists used graphene as a photocatalyst, followed by porphyrinase, which converts sunlight and carbon dioxide to formic acid, which is used in the plastic industry as a fuel for fuels and chemicals. The test results show that graphene-based photocatalysts are powerful in the visible light category and their overall benefits are significantly higher than other catalysts.
The study also found that the material has a good electron transport capability, and the large surface area of ​​graphene helps to accelerate the conversion process of the chemical reaction. This ability to produce solar fuel directly from carbon dioxide can be applied to fuel cells, plastics, and pharmaceutical industries.
The researchers said: "As a practical and powerful system, this result can also be used to produce special fine chemicals, such as chiral 2-amino-1-ylethanol derivatives. This is a variety of extremely expensive hands. The important intermediates of the drugs are now synthesized by the use of sunlight energy through our catalyst-enzyme-coupled artificial photosynthesis system.†(Reporter Hua Ling)
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