Designed Meso‐macroporous Silica Framework Impregnated with Copper Oxide Nanoparticles for Enhanced Catalytic Performance

Abstract

The template efficacy of solid lipid nanoparticles for generating porous silica materials with the amalgamation of Cu‐functionalized cetylpyridinium chloride (CPC; as a co‐emulsifier and as a metal source for generation of CuO oxide nanoparticles) has been explored. Impregnation of CuO nanoparticles (∼10–12 nm) onto the silica matrix proffers to be a propitious route for the fabrication of twin sized porous, highly active catalytic materials. The surface morphology and structural characterization of the synthesized CuO@meso‐macroporous silica framework was elucidated by TEM, field ‐emission (FE)‐SEM, energy‐dispersive X‐ray (EDX), wavelength dispersive (WD)‐XRF, X‐ray photoelectron spectroscopy (XPS), small‐angle X‐ray scattering (SAXS), XRD, and N2 adsorption/desorption studies. All the results have shown that there exists a structural network interconnecting the mesopores with macropores. The catalytic performance of the synthesized framework (ascribed catalyst) was checked for two model reactions. For the reduction of p‐nitrophenol to p‐aminophenol, only 0.25 % (w/v) catalyst was sufficient to accomplish the reaction in 6 min, giving 99.9 % yield. On the other hand, the redox reaction of potassium hexacyanoferrate(III) and sodium thiosulfate utilized 5 % (w/v) catalyst and completed the reaction in 40 min, yielding 98.43 %. Therefore, CuO@meso‐macroporous silica materials could hold great importance in the world of nanocatalysis owing to the present promising results.

Ti3+ Tuning the Ratio of Cu+/Cu0 in the Ultrafine Cu Nanoparticles for Boosting the Hydrogenation Reaction

“…In this work, we demonstrate that doped Ti ions can tune the ratio of Cu + /Cu 0 and stabilize the Cu + by the reversible TiOCu bonds in the Ti-doped SiO 2 supported Cu nanoparticles (Cu/Ti-SiO 2 ) catalysts for the high conversion of DMA to HDO. The dual-template hydrothermal method is applied to synthesize the Ti-SiO 2 supports with macro-mesoporous structure, in which macropores can increase the diffusion of reactants and products, [25][26][27][28][29] and mesopores are used to anchor catalyst nanoparticles. [1,30] And then, the Cu nanoparticles are loaded on the support by the ammonia evaporation method, in which copper salt reacts with Ti-SiO 2 to form copper silicate as the precursor of Cu + /Cu 0 .…”

Synthesis and characterization of copper oxide nanoparticles using Brassica oleracea var. italic extract for its antifungal application

“…Recently Metal Oxide nanoparticles have a challenging base for research as wide varieties of applications attract researchers to explore its properties especially due to their ability to alter the physical, optical and the electronic properties of compounds. Copper oxide nanoparticles gains special interest among the oxides of transition metals because of their efficiency as nanofluids [1], sensors [2], antimicrobial applications [3], catalysis [4], super conductors [5] energy storage systems [6] and as anticancer agent [7]. So far,Copper oxide nanoparticles have been synthesized using chemical, physical, biological and hybrid methods.…”

Green Nanotechnology-Driven Drug Delivery Assemblies

“…SLNs are at the forefront of nanocarriers having numerous potential applications in research and clinical medicine, drug delivery, etc. 88 SLNs are termed as submicron colloidal carriers, which are made up of a solid lipid core matrix stabilized in an aqueous solution of emulsifier. The ability of the SLNs to encapsulate the drugs within nanocarriers offers a new prototype (having unique size-dependent properties) that can be used for secondary and tertiary levels of drug targeting.…”