Ortiz-Bustos, JosefaFajardo, Marianodel Hierro, IsabelPérez, Yolanda2024-11-252024-11-252019-07-11Josefa Ortiz-Bustos, Mariano Fajardo, Isabel del Hierro, Yolanda Pérez, Versatile titanium dioxide nanoparticles prepared by surface-grown polymerization of polyethylenimine for photodegradation and catalytic CC bond forming reactions, Molecular Catalysis, Volume 475, 2019, 110501, ISSN 2468-8231, https://doi.org/10.1016/j.mcat.2019.1105012468-8231https://hdl.handle.net/10115/42012Crystalline TiO2 anatase nanoparticles have been synthesized by a sol-gel procedure with a certain ratio of brookite phase due to low calcination temperature. TiO2 NPs have been successfully functionalized with hyperbranched polyethylenimine polymer (PEI) by the surface polymerization of aziridine or with N1-(3-trimethoxysilylpropyl)-diethylenetriamine (DT) by surface silanization to form catalyst with notable basic and photocatalytic properties. The TiO2 NPs have been characterized by X-ray diffraction (XRD), adsorption-desorption isotherms, fourier-transform infrared spectroscopy (FT-IR), diffuse reflectance UV–vis spectroscopy (DRUV-vis), elemental analysis, thermogravimetric analysis, transmission electron microscopy (TEM), photoluminiscence spectroscopy (PL) and solid-state voltammetry. Functionalized TiO2 NPs have revealed to be efficient in the photodegradation of methylene blue in water and as basic heterogeneous catalysts carbon-carbon forming reactions as Knoevenagel condensation, multicomponent reactions and Biginelli reaction. PEI-TiO2 with mesoporous structure and narrow size pore distribution, fulfill the requirements imposed to an eco-friendly and cost-effective catalyst since it is easily synthesized and recyclable.engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/photocatalysistitanium dioxidepolyethyleniminecatalytic C-C couplinginfo:eu-repo/semantics/article10.1016/j.mcat.2019.110501info:eu-repo/semantics/embargoedAccess