Engineering of highly active Au/Pd supported on hydrogenated urchin-like yolk@shell TiO₂ for visible light photocatalytic Suzuki coupling

Abstract

An engineered hydrogenated urchin-like yolk@shell TiO2 structure decorated with Au/Pd nanoparticles was designed via sequential steps and employed in visible light photocatalytic Suzuki coupling.

Yolk–shell nanostructures: synthesis, photocatalysis and interfacial charge dynamics

“…[111][112][113][114] Yolk-shell nanostructures have also demonstrated remarkable photocatalytic activity for synthesis of ne chemicals. [115][116][117][118][119][120] In a study by Ziarati et al, yolk-shell TiO 2 structures (Y@S-TiO 2 ) were prepared in a solvothermal reaction via Ostwald ripening. 118 The obtained Y@S-TiO 2 was further modied with di-amines to wrap graphene sheets in a high level.…”

“…Typical Suzuki-Miyaura coupling reactions use Pd as catalysts. Photocatalysts containing Pd are also capable of conducting efficient coupling reactions 119,[123][124][125] In the study by Rohani et al, 128 yolkshell structures comprising hydrogenated urchin-like TiO 2 shell and TiO 2 yolk (HUY@S-TOH) were prepared in an Ostwald ripening-based dissolution-recrystallization process. These yolk-shell structures were decorated with Au-Pd core-shell particles (HUY@S-TOH/AuPd), which were employed as photocatalysts to carry out Suzuki-Miyaura coupling reaction.…”

Rational design of yolk–shell nanostructures for drug delivery

“…Inorganic encapsulation materials such as organic polymers, liposomes, silica, and bioceramics have been used. 2,3 Yolk-shell structures or so-called nano-rattles are a particular class of core-shell conguration with a unique core@void@shell that have been widely used due to their catalysis ability, [4][5][6][7] and have been applied as nanoreactors, 8,9 and in energy storage 10 and drug delivery systems. 11 A wide range of chemical compositions, including NPs@silica, metal oxide@silica, 12 metal NPs@carbon, 13 metal NPs@metal oxide, 14 metal NPs@polymer, silica@metal oxide, silica@carbon, 15 and polymer@polymer 16 have been used in these structures, which are widely applied in drug delivery systems.…”

A photoredox catalysed Heck reactionviahole transfer from a Ru(ii)-bis(terpyridine) complex to graphene oxide

“…[33][34][35][36] Recently, photocatalytic selective organic transformations [37][38][39][40][41] including homogenous photocatalyzed C-C cross-coupling reactions under visible-light have attracted much interest. [42][43][44][45][46][47][48][49][50][51][52][53] Heterogeneous catalytic systems 42,[54][55][56][57][58][59][60] for C-C cross-coupling reactions have been reported in smaller numbers. Ligand-free palladium catalysed cross-couplings in general require higher temperatures.…”