Preparation of g-C3N4/TCNQ Composite and Photocatalytic Degradation of Pefloxacin

Abstract

g-C3N4 and g-C3N4/TCNQ composites with different doping levels were prepared using the copolymerization thermal method with melamine as a precursor. XRD, FT-IR, SEM, TEM, DRS, PL, and I-T characterized them. The composites were successfully prepared in this study. The photocatalytic degradation of pefloxacin (PEF), enrofloxacin (ciprofloxacin), and ciprofloxacin (ciprofloxacin) under visible light (λ > 550 nm) showed that the composite material had the best degradation effect on PEF. When TCNQ doping is 20 mg and catalyst dosage is 50 mg, the catalytic effect is the best, and the degradation rate reaches 91.6%, k = 0.0111 min−1, which is four times that of g-C3N4. Repeated experiments found that the cyclic stability of the g-C3N4/TCNQ composite was good. The XRD images were almost unchanged after five reactions. The radical capture experiments revealed that ·O2− was the main active species in the g-C3N4/TCNQ catalytic system, and h+ also played a role in PEF degradation. And the possible mechanism for PEF degradation was speculated.

Photocatalytic Degradation of Quinolones by Magnetic MOFs Materials and Mechanism Study

“…This showed that different ligands also affect the structure of the MOF materials. The characteristic peaks of MIL-100(Fe) mainly appeared at 2θ degrees of 10.2° and 11.0° [27], and the characteristic peaks of the g-C3N4 were around 27.5°, which correspond to the crystalline diffraction peaks of raw g-C3N4 [28].…”

Organic superconductor modified NH2-UiO-66 for boosting photocatalytic Cr(vi) elimination under low-power ultraviolet light

“…Besides, the NU90TC10 composite showed broader photon adsorption regions, which was attributed to the existence of TCNQ in NU90TC10, improving its photon response ability. 67 The photocatalytic elimination mechanism of Cr(VI) over NU90TC10 was verified through photocurrent responses, photoluminescence (PL) and electrochemical impedance spectroscopy (EIS) measurements. 68 First, to deepen the understanding of the photo-generated carrier separation behaviour, photocurrent response curves for NH 2 -UiO-66, TCNQ and NU90TC10 were measured during on/off light illumination (Fig.…”