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BIO FUEL
New photocatalyst speeds up the conversion of carbon dioxide into chemical resources
by Staff Writers
Daegu, South Korea (SPX) May 30, 2017


A schematic diagram showing the mechanism of the conversion of carbon dioxide into methane using the reduced titanium dioxide developed by the team. Image courtesy DGIST.

DGIST's joint research team has developed a new titania photocatalyst that converts carbon dioxide into methane three times more efficiently than the existing photocatalyst by manipulating its surface.

Carbon dioxide is a major cause of global warming. Therefore, in order to control atmostpheric carbon dioxide concentration, many countries are actively working on numerous studies to investigate effective ways to transform carbon dioxide into chemical fuels such as methane, ethane and methanol.

In particular, a high-efficiency photocatalyst is essential to help prevent the generation of secondary harmful substances when converting carbon dioxide into chemical fuels.

The research team has applied a simple magnesiothermic reduction method to synthesize oxygen-deficient titanium dioxide by removing oxygen atoms on the surface of titanium dioxide, which turns out to be a high-efficient photocatalyst that can effectively convert carbon dioxide into methane.

The research team mentions that the newly developed photocatalyst illustrates controlled band gap by removing oxygen atoms on the surface of titanium dioxide through strong reduction of magnesium and hydrogen.

This band gap control improves the light absorption and optimizes the efficient charge separation. As a result, the photocatalyst is found to increase conversion rate of carbon dioxide into methane up to threefold compared to the existing photocatalyst.

In addition, the study demonstrates that reduced titanium dioxide photocatalyst developed by DGIST team is superior to that of the existing titanium dioxide in terms of the conversion efficiency of carbon dioxide into methane.

It also highlights the excellence of the current magnesiothermic reduction method which was applied for the preparation of reduced titanium dioxide photocatalyst through a relatively simple thermoreduction method with Mg metal and hydrogen gas.

Professor Su-Il In stated "The key of this study is that we have improved the efficiency of the existing titanium dioxide photocatalyst by using a relatively simple magnesiothermic reduction method." He added "By understanding the conversion mechanism of carbon dioxide into hydrocarbon, we expect to apply it to use carbon dioxide as resource in abatement technologies."

Research paper

BIO FUEL
Discovery of an alga's 'dictionary of genes' could lead to advances in biofuels, medicine
Los Angeles CA (SPX) May 26, 2017
Plant biologists and biochemists from UCLA, UC Berkeley and UC San Francisco have produced a gold mine of data by sequencing the genome of a green alga called Chromochloris zofingiensis. Scientists have learned in the past decade that the tiny, single-celled organism could be used as a source of sustainable biofuel and that it produces a substance called astaxanthin, which may be useful fo ... read more

Related Links
Daegu Gyeongbuk Institute of Science and Technology
Bio Fuel Technology and Application News

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