Ranolazine-functionalized CuO NPs: efficient homogeneous and heterogeneous catalysts for reduction of 4-nitrophenol

Authors : Gul Naz LAGHARI BALOCH, Sarfaraz Ahmed MAHESAR, Jan NIISAR, Sirajuddin KHAN, Syed Tufail Hussain SHERAZI

Pages : 168-179

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In the present study copper oxide nanoparticles insert ignore into journalissuearticles values(CuO NPs); were synthesized using a hydrothermal method with ranolazine as a shape-directing agent. Ranolazine-functionalized CuO NPs were characterized by various analytical techniques such as scanning electron microscopy insert ignore into journalissuearticles values(SEM);, Fourier transform infrared insert ignore into journalissuearticles values(FTIR); spectroscopy and X-ray diffraction insert ignore into journalissuearticles values(XRD);. The SEM pattern confirmed the morphology of ranolazine-functionalized CuO NPs with well-defined rice-like structures. FTIR spectroscopy confirmed the interaction between CuO NPs and ranolazine. The XRD analysis indicated that the structure of ranolazine-functionalized CuO NPs was monoclinic crystalline and the size ranged between 9 and 18 nm with an average particle size of 12 nm. The smaller size range of CuO NPs gave a large surface area that enhanced the efficiency of these catalysts employed for the reduction of 4-nitrophenol insert ignore into journalissuearticles values(4-NP); to 4-aminophenol insert ignore into journalissuearticles values(4-AP); in the H2 O system. In homogeneous catalysis, results showed that 50 μL of CuO NPs was required in the presence of NaBH4 for 99% reduction of 4-NP in 240 s. On the other hand, for heterogeneous catalysis, 0.5 mg of CuO NPs was used in the presence of NaBH4 for 99% catalytic reduction of 4-NP to 4-AP in 320 s. The rate of reaction for homogeneous catalysis and heterogeneous catalysis was determined from the plots of Ininsert ignore into journalissuearticles values(Ct /C0); of 4-NP versus time insert ignore into journalissuearticles values(s);, which showed good linearity with values of 1.3 × 10−2 and 8.8 × 10−3 s−1 . respectively. The high-quality catalytic efficiency, good reusability, nontoxic nature, and low cost are favorable properties of the synthesized CuO NPs for use as efficient catalysts for reduction of 4-AP to 4-NP in both homogeneous and heterogeneous media.
Keywords : Copper oxide nanoparticles, ranolazine, catalysis, reduction, 4 nitrophenol