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.
A schematic diagram showing the mechanism of the conversion of carbon dioxide into methane using the reduced titanium dioxide developed by the team.
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."
Dahye Kim | EurekAlert!
Rochester scientists discover gene controlling genetic recombination rates
23.04.2018 | University of Rochester
One step closer to reality
20.04.2018 | Max-Planck-Institut für Entwicklungsbiologie
University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.
Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.
Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...
Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.
The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...
Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.
Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...
In the fight against cancer, scientists are developing new drugs to hit tumor cells at so far unused weak points. Such a “sore spot” is the protein complex...
13.04.2018 | Event News
12.04.2018 | Event News
09.04.2018 | Event News
23.04.2018 | Earth Sciences
23.04.2018 | Trade Fair News
23.04.2018 | Information Technology