Microwave-assisted synthesis of Ag-doped MOFs-like organotitanium polymer with high activity in visible-light driven photocatalytic NO oxidization

A novel Ag-doped MOF-like organotitanium polymer (Ag@NH 2 -MOP(Ti)) was synthesized via a microwave-assisted coordination and polymerization reaction with 2-aminoterephthalic acid (H 2 ATA) and tetra- n -butyl titanate (Ti(OC 4 H 9 ) 4 ), followed by the crystal growth and assembly onto Ag nanoparticles (NPs). This Ag@NH 2 -MOP(Ti) exhibited excellent activity in visible-light driven photocatalytic NO oxidization, much higher than N -doped TiO 2 by two times. The NH 2 -MOP(Ti) absorbed visible lights to generate photoelectrons and holes, accompanied by producing HO and O 2 − active sites for the subsequent NO oxidation into NO 3 − . The Ag NPs allowed assembly of NH 2 -MOP(Ti) polymer favoring light absorbance via multiple reflections and also facilitated photoelectrons transfer to reduce photoelectron–hole recombination, leading to the enhanced photocatalytic activity for NO oxidation and inactivating bacteria. Moreover, it could be used repetitively owing to the high stability.