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The influence of various precursors on solar-light-driven g-C3N4 synthesis and its effect on photocatalytic tetracycline hydrochloride (TCH) degradation

2024; Elsevier BV; Volume: 162; Linguagem: Inglês

10.1016/j.inoche.2024.112201

1879-0259

Dhruti Sundar Pattanayak, Dharm Pal, Chandrakant Thakur,

TiO2 Photocatalysis and Solar Cells

Graphitic carbon nitrides (g-C3N4) were produced by thermal polymerization method employing inexpensive, environmental friendly precursors (nitrogen rich) for example melamine, guanidine hydrochloride, cyanamide, and thiourea (denoted as M-CN, G-CN, C-CN, and T-CN). The physical, chemical, optical, and surface structure properties of the carbon nitride were investigated via XRD, UV-DRS, PL, FTIR, BET, SEM and EDX. After 60 min of solar light irradiation, the photocatalytic tetracycline hydrochloride (TCH) degradation efficiency of M-CN, G-CN, C-CN, and T-CN is 41, 46, 49, and 55%, in that order. T-CN's photodegradation performance rose by at least 1.5 times when compared to M-CN. The degradation kinetics is pseudo-first-order (K = 0.013 min−1) and total organic carbon elimination is greater than 52.0%. The reusability test revealed that T-CN was very stable after 5 cycles, with less substantial decline (< 9%) in TCH degradation efficiency. Reduced recombination of the electron and hole pairs in T-CN photocatalyst was confirmed by lower PL intensity spectra. O2-· is the principal reactive species that boosted the photocatalytic activity of T-CN confirmed by radical scavenging test.