Synthesis and characterization of SiO2-NiO xerogel nanocomposite prepared by sol–gel method for catalytic reduction of p-nitrophenol. Issue 1 (31st December 2022)

• Record Type: Journal Article
• Authors: Saeed, Syed Rashid; Ajmal, Muhammad; Bibi, Iram; Shah, Syed Sakhawat; Siddiq, Muhammad
• Is Part Of: Journal of Taibah University for science. Volume 16:Issue 1(2022)
• Page Start: 472
• Page End: 479
• Publication Date: 2022-12-31
• Subjects: Xerogel -- nanocomposite -- p-nitrophenol -- catalysis; Science -- Periodicals; Science; Periodicals; 505
• DOI: 10.1080/16583655.2022.2073541
• Languages: English
• ISSNs: 1658-3655

Abstract

Abstract : This manuscript describes the preparation and characterization of silica-nickel oxide (SiO2 -NiO) xerogel nanocomposite and its catalytic application in the hydrogenation of p -nitrophenol. Hydrochloric acid and ammonium hydroxide were used as the acid and base catalyst, respectively during the synthesis of SiO2 -NiO. The Fourier Transformation Infra-Red spectroscopic results supported the formation of the silica xerogel skeleton structure with corresponding characteristic peaks of siloxane linkage. The surface of SiO2 -NiO xerogel nanocomposite was observed to be porous along with some irregular cracks. The X-Ray diffraction analysis showed that the SiO2 -NiO xerogel nanocomposite was amorphous in nature. The synthesized xerogel nanocomposite was employed as a catalyst for the hydrogenation of p -nitrophenol with sodium borohydride in water. The rate of hydrogenation of p -nitrophenol was observed to be increased with the increased amount of catalyst as well as the temperature. The maximum reduction rate of p-nitrophenol was found as high as 0.26 min -1 .