Graphitic carbon nitride/SmFeO₃ composite Z-scheme photocatalyst with high visible light activity

Abstract

In this work, novel heterostructured photocatalysts associating graphitic carbon nitride (g-CN) and SmFeO 3 were prepared via a mixing-ultrasonication process. Structural, optical and morphological characterizations demonstrate that the interfacial junction between g-CN and SmFeO3 is well established for all g-CN/SmFeO3 composites prepared with g-CN:SmFeO 3 weight ratio of 20:80, 50:50 and 80:20. The g-CN/SmFeO 3 (80:20) composite exhibits the highest photocatalytic activity for the degradation of pollutants like the Orange II dye and the tetracycline hydrochloride antibiotic under visible light irradiation. This high photocatalytic activity originates from the enhanced light absorption over the whole visible region compared to pure g-CN and from the improved separation and transfer of photogenerated electron/hole pairs as demonstrated by photoluminescence and photocurrent measurements. A Z-scheme charge carrier transfer mechanism was demonstrated for the photocatalytic reactions. The g-CN/SmFeO 3 (80:20) catalyst was also demonstrated to be stable and can be reused up to six times without significant alteration of the activity.

Self‐Assembly of Hollow, Pompon‐Like and Nanosheet‐Structured Carbon Nitride for Photodegradation of Tetracycline Hydrochloride

“…Finally, a comparison in the photocatalytic activity of hp-CN-6 for TC degradation to that of materials reported in literature [43][44][45][46][47] was made, as listed in Table S2 Information. The results show that the hp-CN-6 has significant advantages for TC removal, with reaction rate of 2.26 mmol g −1 min −1 , which is higher than that of materials reported in the literatures.…”

SmFeO 3 and SmFe 1‐x Er x O 3 based perovskite nanorods for improved oxygen and hydrogen evolution functions

“…The morphological dimension of SFO and SFEO structures Figure 3E, F. The interplanar distance evaluated from the HRTEM images correspond to 112 plane (0.27 nm) of SmFeO 3 phase. 27 Additionally, the polycrystallinity in SFO and SFEO was also verified via selected area diffraction pattern (SAED) shown in Figure 3E, F.…”

Synthesis of SnS2/Carbon Quantum Dots/g‐C3N4 Composite and Its Photocatalytic Property

“…Based on the above calculation data, a new Z‐scheme charge transfer mechanism is proposed to illustrate the enhancement of the photocatalytic activity of SnS 2 /CQDs/g‐C 3 N 4 composites, [ 41 ] and its photocatalytic mechanism is shown in Figure . Under visible light irradiation, g‐C 3 N 4 and SnS 2 can be effectively excited to generate electron–hole pairs.…”