News Column

Shahid Chamran University produces nanocatalyst

June 11, 2014





Iranian researchers from Shahid Chamran University of Ahvaz have produced a non-toxic nanocatalyst that is highly effective in treating pollutants.

The nanocatalyst was produced through a simple and inexpensive method, which can be used in the production of water and air purification filters, Fars News Agency

wrote.

In recent year, researchers have paid special attention to zinc oxide due to its non-toxicity, low price, stability and high chemical performance. In addition, zinc oxide has higher efficiency in photocatalytic reduction of some pollutants than other commercial materials.

This research studied zinc oxide nanostructures and their photocatalytic properties through a simple method. Results of the research confirm the difference in the photocatalytic performance of nanostructures.

Photocatalytic activity is higher in nanodisks and nanoheets than in nanoparticles and it is higher in nanoparticles than in nanowires. Moreover, many of the produced samples had better photocatalytic properties than titania nanoparticles, which indicate the high performance of zinc oxide.

According to the results, the best photocatalytic activity was obtained in the sample produced through thermal decomposition of zinc acetate dehydrate for five hours in vapor phase. The sample decomposes more than 72 percent and 99 percent of methylene blue color in the first 30 and 120 minutes, respectively.

A logical relation between the amount of color adsorption by zinc oxide nanoparticles was observed in the first 30 minutes in the absence of UV radiation and the photocatalytic activity. Therefore, it can be concluded that many of the samples are in agreement with Langmuir-Hinshelwood Model.


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Source: Iran Daily


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