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相关概念视频

Light as Energy01:35

Light as Energy

78.2K
The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit...
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The Z-Scheme of Electron Transport in Photosynthesis01:34

The Z-Scheme of Electron Transport in Photosynthesis

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The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
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相关实验视频

Updated: Jun 19, 2025

Biomass Conversion to Produce Hydrocarbon Liquid Fuel Via Hot-vapor Filtered Fast Pyrolysis and Catalytic Hydrotreating
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Biomass Conversion to Produce Hydrocarbon Liquid Fuel Via Hot-vapor Filtered Fast Pyrolysis and Catalytic Hydrotreating

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靠近红外光驱动的生物质转化.

Longfei Hong1, Huiyan Zhang1, Liangdong Hu1

  • 1Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China.

Science advances
|July 26, 2024
PubMed
概括

研究人员利用近红外 (NIR) 光进行生物质转化,这与传统的紫外可见 (UV-vis) 光相比是一个显著的进步. 这种光热协同的光催化使5-基甲基 (HMF) 可选择性转化为有价值的化学物质.

科学领域:

  • 光催化作用的光催化
  • 绿色化学 绿色化学
  • 生物质转换生物质转换

背景情况:

  • 传统的光催化依赖于高能紫外线,限制了太阳光谱的利用.
  • 接近红外线 (NIR) 光,占太阳能约50%,在很大程度上未被用于光催化.
  • 生物质转化提供了一条可持续的通往有价值化学品的途径.

研究的目的:

  • 在光催化中探索低能NIR光的高效利用.
  • 揭示一种用于选择性生物质转换的光热协同光触媒的新型机制.
  • 用NIR光来证明选择性转化5-基甲基 (HMF) 的情况.

主要方法:

  • 研究了生物质衍生的5-基甲基 (HMF) 的光催化转化.
  • 利用近红外 (NIR) 光,并将其效果与紫外线可见光 (UV-vis) 光进行了比较.
  • 分析反应产物以确定不同光线条件下的选择性.

主要成果:

  • 暗红外光使HMF的高效光催化转化成为可能.
  • 在NIR光下确定了一种独特的光热协同光催化机制.
  • 红外光选择性地产生了5-甲基-2-碳酸 (FFCA),而紫外光偏好了2,5-二甲基 (DFF).

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Last Updated: Jun 19, 2025

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Biomass Conversion to Produce Hydrocarbon Liquid Fuel Via Hot-vapor Filtered Fast Pyrolysis and Catalytic Hydrotreating

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CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
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CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light

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Light-Controlled Fermentations for Microbial Chemical and Protein Production

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结论:

  • 红外线光可以有效地与生物质转化相结合,用于可持续的化学合成.
  • 光热协同的光催化提供了选择性化学生产的新范式.
  • 这种方法最大限度地利用太阳能和地球丰富的生物质资源.