CTAB assisted co‐precipitation synthesis of NiO nanoparticles and their efficient potential towards the removal of industrial dyes

In this work, nickel oxide nanoparticles (NiO NPs) have been synthesised via cost‐effective and highly convenient co‐precipitation method, using cetyl trimethyl ammonium bromide (CTAB) as capping agent and NaOH as a reducing agent. The as‐synthesised NPs have been analysed by a number of spectroscopic and microscopic techniques such as UV–visible spectroscopy, transmission electron microscope, X‐ray diffraction, Fourier transformed infrared and energy dispersive X‐ray. The prepared NiO NPs hold the prodigious potential towards the photocatalytic degradation of reactive blue 81 and Coomassie brilliant blue R‐250 dyes with degradation efficiency of 90.8 and 95.7% and have high dye degradation rate constants of 1.3 × 10 − 2 min − 1 and 2.2 × 10 − 2 min − 1 , respectively. Thus, this work signifies an efficient way to employ the NiO NPs as effective photocatalyst towards the alleviation of noxious industrial dyes.