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Artificial photosynthesis could help make fuels, plastics and medicine

Date:
April 29, 2015
Source:
American Chemical Society
Summary:
The global industrial sector accounts for more than half of the total energy used every year. Now scientists are inventing a new artificial photosynthetic system that could one day reduce industry's dependence on fossil fuel-derived energy by powering part of the sector with solar energy and bacteria. The system converts light and carbon dioxide into building blocks for plastics, pharmaceuticals and fuels -- all without electricity.
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The global industrial sector accounts for more than half of the total energy used every year. Now scientists are inventing a new artificial photosynthetic system that could one day reduce industry's dependence on fossil fuel-derived energy by powering part of the sector with solar energy and bacteria. In the ACS journal Nano Letters, they describe a novel system that converts light and carbon dioxide into building blocks for plastics, pharmaceuticals and fuels -- all without electricity.

Peidong Yang, Michelle C. Y. Chang, Christopher J. Chang and colleagues note that plants use photosynthesis to convert sunlight, water and carbon dioxide to make their own fuel in the form of carbohydrates. Globally, this natural process harvests 130 Terawatts of solar energy. If scientists could figure out how to harness just a fraction of that amount to make fuels and power industrial processes, they could dramatically cut our reliance on fossil fuels. So, Yang, Michelle Chang and Christopher Chang's teams wanted to contribute to these efforts.

The groups developed a stand-alone, nanowire array that captures light and with the help of bacteria, converts carbon dioxide into acetate. The bacteria directly interact with light-absorbing materials, which the researchers say is the first example of "microbial photoelectrosynthesis." Another kind of bacteria then transforms the acetate into chemical precursors that can be used to make a wide range of everyday products from antibiotics to paints.

The authors acknowledge funding from the U.S. Department of Energy, the Lawrence Berkeley National Laboratory, Howard Hughes Medical Institute, the National Science Foundation and the National Institutes of Health.


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Materials provided by American Chemical Society. Note: Content may be edited for style and length.


Journal Reference:

  1. Chong Liu, Joseph J. Gallagher, Kelsey K. Sakimoto, Eva M. Nichols, Christopher J. Chang, Michelle C. Y. Chang, Peidong Yang. Nanowire–Bacteria Hybrids for Unassisted Solar Carbon Dioxide Fixation to Value-Added Chemicals. Nano Letters, 2015; 150407103432009 DOI: 10.1021/acs.nanolett.5b01254

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American Chemical Society. "Artificial photosynthesis could help make fuels, plastics and medicine." ScienceDaily. ScienceDaily, 29 April 2015. <www.sciencedaily.com/releases/2015/04/150429104811.htm>.
American Chemical Society. (2015, April 29). Artificial photosynthesis could help make fuels, plastics and medicine. ScienceDaily. Retrieved May 23, 2017 from www.sciencedaily.com/releases/2015/04/150429104811.htm
American Chemical Society. "Artificial photosynthesis could help make fuels, plastics and medicine." ScienceDaily. www.sciencedaily.com/releases/2015/04/150429104811.htm (accessed May 23, 2017).

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