Catalytic reduction of 4-nitrophenol using synthesized and characterized CoS@MorphcdtH/CoS@4-MPipzcdtH nanoparticles

CoS@MorphcdtH NPs and CoS@4-MPipzcdtH NPs were synthesized by precipitation method involving three mechanisms: inclusion, occlusion, and adsorption. The synthesized NPs were characterized with the help of UV-Vis spectroscopy, FESEM-EDAX, powder x-ray diffraction, TEM, ESIMS, TG/DSC analysis. The morphology of the CoS@MorphcdtH NPs and CoS@4-MPipzcdtH NPs were hexagonal and rectangular, and the particles were in the range 7-12 nm. UV-visible spectral measurements showed surface plasmon resonance at 320 nm-340 nm with band gap of 3.65 eV-3.86 eV. The catalytically active CoSNPs called were investigated for the reduction of 4-nitrophenol (4-NP) via hydrogenation using sodium borohydride (NaBH4) as a reducing agent. Both the CoS NPs successfully reduced 4-NP to 4- aminophenol (4-AP) in a short time, catalytic performances are almost unchanged for the first five cycles. Herein, we report the preparation and characterizations of efficient active CoS NPs consisting carbodithioic acid framework as a support/capping material, along with catalytic property.

Automated summary

CoS@MorphcdtH NPs and CoS@4-MPipzcdtH NPs were synthesized using the precipitation method with inclusion, occlusion, and adsorption mechanisms. The synthesized NPs were characterized using various techniques. The morphology of the NPs was hexagonal and rectangular, with particle sizes ranging from 7-12 nm. UV-visible spectral measurements showed surface plasmon resonance at 320 nm-340 nm with a band gap of 3.65 eV-3.86 eV. The catalytic CoS NPs successfully reduced 4-nitrophenol to 4-aminophenol, and their catalytic performance remained stable for the first five cycles. This study reports the preparation and characterization of efficient active CoS NPs with a carbodithioic acid framework as a support/capping material.