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Artificial photosynthesis can produce food without sunshine


Scientists have found a way to bypass the need for biological photosynthesis altogether and create food independent of sunlight by using artificial photosynthesis. The technology uses a two-step electrocatalytic process to convert carbon dioxide, electricity, and water into acetate. Food-producing organisms then consume acetate in the dark to grow. The hybrid organic-inorganic system could increase the conversion efficiency of sunlight into food, up to 18 times more efficient for some foods.
 

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59,683 Posts

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59,683 Posts

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59,683 Posts

Graphene efficiently recovers gold from waste electronics


First the e-waste is ground up, then dissolved in a solution. A membrane made of reduced graphene oxide is added, and within a few minutes pure gold begins to accumulate on the membrane surface. Just 1 gram of graphene is enough to extract almost twice that amount of gold, attracting over 95% of the gold in a given sample even at concentrations as low as one part per billion. Importantly, it doesn't attract other metals in the e-waste mixture, and afterwards the graphene membrane can be burned off, leaving behind the pure gold.
 
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