Abstract
Functionalized multiwalled carbon nanotubes (F-MWCNTs)/Co–Ti oxide nanocomposites and neat Co–Ti oxide nanoparticles were synthesized by chemical reduction method. The scanning electron microscopy micrographs show that the bimetallic NPs in F-MWCNTs/Co–Ti are present in dispersed form while the neat Co–Ti nanoparticles were found in agglomerated form. The formation of nanocomposites and neat Co–Ti nanoparticles was also confirmed by energy-dispersive X-ray. Both types of nanocomposites were employed as photocatalyst for the photodegradation of Rhodamine B in aqueous medium under UV light irradiation. The photodegradation study was performed via UV–Vis spectrophotometer. The photodegradation results show that F-MWCNTs/Co–Ti oxide NPs degraded about 93.35% dye within 150 min irradiation time while the neat Co–Ti oxide NPs degraded about 91.76% dye within same irradiation time. The F-MWCNTs/Co–Ti can be easily removed and recycled due to its bulky composite nature as compared to neat Co–Ti oxide NPs. The effect of dye concentration, catalyst dosage, pH of medium and activity of recycled catalyst was also evaluated.
Highlights
Bimetallic nanoparticles are a type of nanoparticles (NPs) which consist of two different metals that show a combination of properties that are associated with the two constituent metals (Devi and Singh 2016)
These F-MWCNTs/Co–Ti and Co–Ti NPs were used as photocatalyst for the photodegradation of Rhodamine B dye under UV light irradiation in aqueous medium as a function of irradiation time, catalyst dosage, dye concentrations and pH of the media
The surface morphological study is very important for analyzing the surface area as it is directly related with the catalytic activity while compositional study provides information about the particular material synthesis and its purity
Summary
Bimetallic nanoparticles are a type of nanoparticles (NPs) which consist of two different metals that show a combination of properties that are associated with the two constituent metals (Devi and Singh 2016). Bimetallic NPs exhibit unique properties as compared to their pure individual NPs. Bimetallic NPs exhibit unique properties as compared to their pure individual NPs They have a wide range of magnetic, biomedical and catalytic applications. They have a tunable optical behavior and play a vital role in bio-sensing (Devi et al 2016). Among various types of bimetallic NPs, bimetallic alloy NPs have higher catalytic efficiency than their monometallic counterparts due to strong synergy between the metals (Devi and Singh 2016). Different bimetallic NPs were reported as photocatalyst for the photodegradation of organic
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