Thursday , January 28 2021

Ammonia converting harmful substances into a metal oxide field using gold nanoparticles – ScienceDaily



Researchers at the Tokyo Metropolitan University have demonstrated a new engineering engineered by gold nanoparticles that support the metal oxide sector, which exhibits ammonia impurities in the air and is a good selectivity for nitrogen gas. It is important that it is effective at room temperature and is suitable for air conditioning debugging systems. The group identified the mechanisms behind this behavior, which led to the design of new catalytic materials.

Many of the eminent aromatic fragrance are known by many. It is a common chemical industry that mainly uses fertilizers and disinfectants, both at home and in medicine. Very toxic is concentrated; The United States Occupational Safety and Risk Administration has a strict limit on more than one million parts with average air breathing, eight hours 'workday and fifty hours' work week. With regard to the widespread use of industry and its presence in nature, it is essential to establish effective measures that remove unwanted ammonia in the workplace and living environment.

As in the case of car catalysts, catalysts can help solve this problem. Unlike intake of the harmful substances, the catalytic filter can break ammonia, like nitrogen and water-like products. It is safer, as well as avoiding toxic chemicals, it is also not necessary periodically. However, conventional catalysts for ammonia work at temperatures above 200 degrees Celsius, since they are not effective for home appliances.

Nowadays, a team led by the Toru Murayama teacher project at Tokyo Metropolitan University has designed catalytic filtering that can work at room temperature. Made of nanoparticles of gold nested in the niobium oxide field, the designed filter is a highly detectable ammonia that is almost completely converted to nitrogen gas and water, and not by nitrous oxide by-products. This is known as selective catalytic oxidation (SCO). The NBC Meshtec Inc. industrial partners worked to create a prototype job; The filter has already been applied to reduce ammonia contaminated levels at detectable levels.

It is important that the team has also shown a well-functioning mechanism. Gold nanoparticles have shown that they play an important role in increasing catalytic activity with a higher load. Likewise, the selection of the field was found to be very important, because they showed experimental chemicals Brønsted acid sites The structure of niobium oxide was rigorous when it came to selective material. The group expects the general design principle like this to find the creation and change of other catalysts, expanding their range of applications.

This work contributed to a scholarship for Local and Technological Platform for the Metropolitan Government of Tokyo.

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Materials provided Tokyo Metropolitan University. Note: content can be edited in style and length.


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