Abstract The introduction of nitrogen vacancy to C3N4 holds promise in the photocatalytic behavior improvement. Yet, minimal literatures on reaction and stability mechanisms are presently available in the NO-oxidation reaction… Click to show full abstract
Abstract The introduction of nitrogen vacancy to C3N4 holds promise in the photocatalytic behavior improvement. Yet, minimal literatures on reaction and stability mechanisms are presently available in the NO-oxidation reaction of C3N4. Here C3N4 with three coordinated (N3C) nitrogen vacancy was prepared by directly calcining the mixture of azodicarbonamide and melamine. Unlike previously reported C3N4 that exhibits an obvious deactivation beyond 30 min (>10% loss of reactivity after one cycle) and high in-situ formed NO2 concentration (>100 ppb), the C3N4 with three coordinated (N3C) nitrogen vacancy exerts increased NO-oxidation performance (40.3%, ~2.28 times higher than that of pristine C3N4 with a NO-removal rate of 17.7%) and suppressed in-situ produced NO2 (36.3 ppb, decreased by 76.6 ppb compared to pure C3N4) as well excellent stability (
               
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