Nanoflakes Catalyze Nitrogen Monoxide Decomposition

  • Author: ChemistryViews.org
  • Published: 11 June 2017
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: Dalton Transactions/Royal Society of Chemistry (RSC)
  • Associated Societies: Royal Society of Chemistry (RSC), UK
thumbnail image: Nanoflakes Catalyze Nitrogen Monoxide Decomposition

Nitrogen monoxide (NO) is a pollutant that can contribute to acid rain and ozone layer depletion. It is produced during combustion in cars and its emissions are reduced by the vehicle's catalytic converter. There are a number of silicon-based nanomaterials which act as photocatalysts, but none had been used for NO decomposition so far.


Hiroshi Itahara, Toyota Central R&D Labs., Inc., Nagakute, Japan, and colleagues have developed the first Si-based nanomaterial that is active in the photocatalytic decomposition of NO. The team heated a mixture of CaSi2 and NiCl2 at up to 500 °C. The formation of CaCl2 during this process acts as driving force to extract Ca from the layered CaSi2. The resulting product is a nanocomposite powder composed of Si nanoflakes and metallic particles (Ni and Ni3Si). The CaCl2 was removed by washing with dimethylformamide (DMF).


The nanocomposite has a catalytic activity for NO decomposition under irradiation with light (λ > 290 nm) that is higher than for Si or SiO powders and comparable to TiO2, a commonly used photocatalyst. The activity does not degrade over time. According to the researchers, the same strategy could be used for the production of other high-performance Si-based photocatalysts.


 

Article Views: 1442

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH