US scientists find way to make carbon diioxide into carbon nanofibres

Q.  Which country’s scientists have found a way to take carbon dioxide (CO2) from the air and make carbon nanofibres, a valuable manufacturing material?
- Published on 31 Aug 15

a. India
b. United States
c. Japan
d. Singapore

ANSWER: United States
 
Scientists in the U.S. have found a way to take carbon dioxide (CO2) from the air and make carbon nanofibres, a valuable manufacturing material. Their solar-powered system runs just a few volts of electricity through a vat full of a hot, molten salt; CO2 is absorbed and the nanofibres gradually assemble at one of the electrodes. It currently produces 10g in an hour. The team suggests it could be scaled up and makes an impact on CO2 emissions, but other researchers are unsure. Nonetheless, it could offer a cheaper way of making carbon nanofibres than existing methods.

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