Preparation and characterisation of new Ti/Fluorapatite/MWCNTs ternary nanocomposite and its catalytic activity in the synthesis of pyrazolo [3,4-b] quinoline moieties

We describe the preparation of a new ternary nanocomposite, (Ti/FAp/MWCNTs) constituting titania, fluorapatite and multiwalled carbon nanotubes. First, the fluorapatite (FAp) nanostructures were developed using glutamic acid as crystal growth modifier. The FAp was then reacted with functionalised MWCNTsand TiO2 via sonication in ether. The Powder XRD, FT-IR, and microscopic analysis (SEM and TEM) of the new nanocomposite, Ti/FAp/MWCNTs revealed three phases. TiO2 and FAp particle' sizes were between 50-60 nm and 40-60 nm diameter, respectively. The ternary nanocomposite demonstrated excellent catalytic efficiency for synthesising new pyrazolo [3,4-b] quinolones. The synergy between the Lewis acidic and basic sites contributed to the nanocomposite's effectiveness. Impressive yields (91-95 %) of quinolone derivatives were accomplished in short reaction time (ca.15 min) in the green solvent, EtOH at room temperature. Recyclability with consistent activity (>5 times) is the added advantage of the Ti/FAp/MWCNTs nanocomposite.

Automated summary

The preparation of a new ternary nanocomposite (Ti/FAp/MWCNTs) consisting of titania, fluorapatite, and multiwalled carbon nanotubes, demonstrates excellent catalytic efficiency for synthesizing new pyrazolo [3,4-b] quinolones with impressive yields (91-95%). The nanocomposite also exhibits recyclability (>5 times).