Degradation of Organic Dyes over Polymeric Photocatalyst C3N3S3

Abstract

Abstract-Objective: Due to the good visible-light response and strong electron transfer ability, the polymeric semiconductor C 3 N 3 S 3 was developed as an inspired photocatalyst for the degradation of organic dyes. Methods: Trithiocyanuric acid was used as the raw material for the synthesis of C 3 N 3 S 3 by hydrolytic method in NaOH-KI mixed solution. X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and ultravioletvisible diffuse reflectance spectroscopy were employed to identify the obtained product. Organic dyes with different characteristics were used to evaluate the photocatalytic activity of C 3 N 3 S 3 . Results: The characterization results revealed that the obtained sample had the stable structure of C 3 N 3 S 3 polymer with the band gap of 2.67eV, which is one of the characteristics of conductors. The photocatalytic tests showed that C 3 N 3 S 3 polymer had good photocatalytic activity and adsorption capacity, especially for the cationic dyes. Furthermore, the photocatalytic activity was better when the pH value of dyeing solution was 5. Conclusion: Polymeric semiconductor C 3 N 3 S 3 showed good photocatalytic activity for the degradation of organic dyes, which would be one of the most important materials for the environmental remediation and pollution control.

Comparative Studies of g-C3N4 and C3N3S3 Organic Semiconductors—Synthesis, Properties, and Application in the Catalytic Oxygen Reduction

“…The peaks at 1514, 1346, 1105, and 721 cm − 1 in the monomer spectrum are ascribed to the stretching vibrations of non-aromatic heterocycle thione (tautomeric structure II in Figure 1 c). Specifically, the bands at 1514 and 1346 cm − 1 may be ascribed to C=N and C-N stretching vibrations [ 12 ] in the triazine ring, while that at 1105 cm − 1 is assigned to C=S stretching vibrations [ 13 ]. In the polymer, the peaks at 1514, 1346, and 720 cm − 1 are shifted to 1460, 1220, and 821 cm − 1 , respectively, while the trace of the C=S peak is observed in the band shoulder at about 1140 cm − 1 .…”

Synthesis, characterization and theoretical calculations of Cu(I) complex of trithiocyanuric acid [Cu(ttc)3]

“…After coordinative reaction of ttc, both of peaks at 2 908 ∼ 3 146 (m) and 1 120 (m) cm −1 disappear in the FTIR spectrum; in contrast, characteristics peaks of the trithiocyanurate [27][28][29], appear in the FTIR spectrum (Table 5).…”