Boosting photocatalytic NO oxidation mediated by high redox charge carriers from visible light-driven CN/UiO-67 S-scheme heterojunction photocatalyst.

The construction of CN/UiO-67 (CNU) S-scheme heterojunction composites through in situ formation of UiO-67 on carbon nitride (CN) helps to address the limitations of carbon nitride (CN) in photocatalytic NO elimination. The optimized CNU demonstrates superior photocatalytic efficiency, which is attributed to electronic channels constructed by Zr-N bonds and S-scheme electron transport mechanism, effectively promoting the efficient separation of photogenerated charge carriers with high redox potentials. Density Functional Theory (DFT) calculations reveal redistributed electronic orbitals in CNU, with progressive and continuous energy levels near the Fermi level, which bolsters electronic conduction.

Switching on photocatalytic NO oxidation and proton reduction of NH-MIL-125(Ti) by convenient linker defect engineering.

Photocatalysis technology has been widely adopted to abate typical air pollutants. Nevertheless, developing photocatalysts aimed at improving photocatalytic efficiency is a challenge. Herein, the linker-defect NH-MIL-125(Ti) photocatalyst was synthesized through a convenient one-step heating-stirring method (just adjusting multiple temperatures) to firstly realize efficient photocatalytic performances of NO removal and hydrogen evolution.