Low-Crystallized Carbon as an Electron Mediator in g-CN/C/TiO for Enhancing Photocatalytic Degradation of Antibiotics.

Photodegradation of antibiotics based on photocatalytic semiconductors is a promising option to alleviate water pollution. Despite its limitations, TiO-based photocatalysts are still the most widely studied materials for pollutant degradation. In this work, a pomegranate-like g-CN/C/TiO nano-heterojunction was constructed using the hydrothermal-calcination method, consisting of interconnected small crystals with a dense structure and closely contacted interface.

In situ synthesis of g-CN/TiO heterojunction by a concentrated absorption process for efficient photocatalytic degradation of tetracycline hydrochloride.

The construction of heterojunctions between semiconductors is a preferred route to improve overall photocatalytic activity. In this work, a facile and feasible method was innovatively developed to one-step prepare g-CN/TiO heterojunctions via an absorption-calcination process using nitrogen and titanium precursors directly. This method can effectively avoid interfacial defects and establish a tight interfacial connection between g-CN and TiO.

Ag-enhanced CeF-O: highly enhanced photocatalytic performance under NIR light irradiation.

CeF-O with intermediate band showed improved synergic photodegradation activity toward HCl-TC and RhB under NIR light irradiation when enhanced by Ag as a cocatalyst. Ag ions take electrons from the second transition in CeF-O's intermediate band, which are then reduced to Ag as cocatalyst. The photodegradation efficiencies of HCl-TC by various Ag/CeF-O nanoparticles in 180-min increase from 26.