Abstract
Photocatalytic degradation of acetaldehyde over cadmium sulfide, a semiconductor was investigated. The effect of various parameters, such as pH, concentration of acetaldehyde, amount of semiconductor, effect of light intensity were observed. A tentative mechanism has been proposed for the photocatalytic degradation of acetaldehyde using cadmium sulphide semiconductor.
Highlights
The large amount of solar energy falling on earth can be best utilized to degrade larger molecules into smaller fragments. This serves to protect the environment as it helps to mineralize toxic compounds to less toxic or almost harmless species. These reactions can be supported by using a photocatalyst in the presence of light, diverting the reaction to photocatalytic route
Photocatalytic dehydrogenation of hexanal and reductive carbonylation of pentane by Rh (I) complexes has been reported by Khannanov et al.7Sano et al.8investigated the photocatalytic degradation of gaseous acetaldehyde on TiO2 with photodeposited metals and metal oxides
The fourth beaker, containing acetaldehyde solution and 0.24g of CdS was exposed to light
Summary
The large amount of solar energy falling on earth can be best utilized to degrade larger molecules into smaller fragments. These reactions can be supported by using a photocatalyst (semiconductor) in the presence of light, diverting the reaction to photocatalytic route. Ikeda et al.[6] observed a comparative study on the photocatalytic decomposition of acetaldehyde and ethanol in water containing dissolved oxygen using a microelectrode technique. The effect of various parameters on the rate of photocatalytic degradation was observed.
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