Performance and mechanism of self-cleaning synergistic photocatalytic coating inhibiting NO2 for green degradation of NO

Multitudinous deleterious NO2 will be produced in the process of NO photocatalytic degradation, which may cause serious secondary pollution. In this study, a self-cleaning synergistic photocatalytic coating was constructed by the simple spray method. The coating has excellent superamphiphobicity and NO degradation performance. In addition, the production of NO2 in the process of NO degradation by photocatalytic superamphiphobic coating was inhibited, which indicated the greener photocatalytic process exhibited by this photocatalytic coating. Also, to clarify the inhibition of the coating on NO2, the NO degradation mechanism of the coating and photocatalyst was investigated by in situ IR, trapping test and EPR spectra, and the possible pathway of NO degradation was summarized. Combining the result of DFT calculation and degradation product analysis, the inhibition of NO2 and green degradation mechanism of the self-cleaning synergistic photocatalytic coating was explored and proposed, which may provide some theoretical support for the green application of photocatalysis.

Automated summary

A self-cleaning synergistic photocatalytic coating with excellent superamphiphobicity and NO degradation performance was constructed. The coating inhibited the production of NO2 during the process of NO degradation, indicating a greener photocatalytic process. The inhibition of NO2 and the green degradation mechanism of the coating were explored and proposed, providing theoretical support for the green application of photocatalysis.