Sulfur-doped porous graphitic carbon nitride heterojunction hybrids for enhanced photocatalytic H2 evolution

Qin, Hengfei; Lv, Wenhua; Bai, Jirong; Zhou, Yue; Wen, Yanwei; He, Qinting; Tang, Jianghong; Wang, Liangbiao; Zhou, Quanfa

doi:10.1007/s10853-018-3168-5

Cited by 70 publications

(36 citation statements)

References 50 publications

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“…The same crumpled and porous characteristics are also evident from the HR‐TEM images though the presence of sodium and sulfur cannot be established from the images. Porous and flocculent structures in Na−S−GCN facilitate the separation of charge carriers and thus suppressing recombination . Moreover, the EDX analysis of Na−S−GCN shows the amount of the desired elements as C at 38.64 %, N at 55.15 %, Na at 5.59 % and S at 0.62 % respectively as given in Figure e.…”

Section: Resultsmentioning

confidence: 96%

Sodium and Sulfur Co‐Doped Graphitic Carbon Nitride: A Novel and Effective Visible Light Driven Photocatalyst with Tunable Bandgap for Degradation of Eosin Yellow

et al. 2020

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A novel Na and S co-doped g-C 3 N 4 (NaÀ SÀ GCN) hybrid was synthesized by facile and inexpensive calcination of melamine and Na 2 S. The synthesized catalysts were systematically characterized with XRD, FT-IR, SEM, HR-TEM, XPS, PL and UV-DRS. The successful doping of Na and S in the g-C 3 N 4 layers was confirmed with XPS and FT-IR analysis. UV-DRS spectra and band gap calculation revealed higher visible light absorption and lower band gap of NaÀ SÀ GCN (2.64 eV) than that of GCN (2.83 eV). The photochemical efficiency of NaÀ SÀ GCN was examined using eosin yellow (EY) which afforded 90 % degradation in 140 minutes under visible light. A 7.4 times higher degradation of EY was found with NaÀ SÀ GCN than that with bulk GCN. The higher catalytic activity was attributed to enhanced visible light absorption and effective lowering of recombination of reactive photogenerated species. The involvement of * OH and O 2 * À in the degradation process was confirmed with radical trapping experiments.

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Section: Resultsmentioning

confidence: 96%

Sodium and Sulfur Co‐Doped Graphitic Carbon Nitride: A Novel and Effective Visible Light Driven Photocatalyst with Tunable Bandgap for Degradation of Eosin Yellow

et al. 2020

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“…Meanwhile, the wide absorption band in the range of 1200 to 1600 cm −1 is caused by the stretching vibration of C-N and C=N heterocycle unit of g-C3N4. The other obvious typical peaks at ~3200 cm −1 belong to the amino and surface hydroxyl groups [46,47]. Clearly, all typical peaks of the two components, TiO2 and SCN, are observed in the FT-IR spectra of the SCNTx samples, implying that the two materials have been successfully incorporated into composites.…”

Section: Structure Surface Chemical State and Morphologymentioning

confidence: 91%

Sulfur-doped g-C3N4/TiO2 S-scheme heterojunction photocatalyst for Congo Red photodegradation

Wang

Cheng

et al. 2021

Chinese Journal of Catalysis

600

180

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“…The optical band gap energies (hereinafter, the band gap energy) were evaluated by means of the commonly employed Tauc´s plot [47] Figure S3. The higher absorption of S-CN in comparison with CN was also referred to in the literature, for example, in the works of [32,35,36,39]. The derivatization of CN with mesyl chloride was supposed to incorporate new atom groups to heptazine units acting as chromophores.…”

Section: Uv/vis Diffuse Reflectance Spectrometrymentioning

confidence: 95%

“…There are a lot of papers dealing with the S-doping of CN in the literature. The common way is the synthesis of CN from sulfur-rich organic compounds, such as benzyl disulphide [29], thiourea [30][31][32][33][34][35][36], trithiocyanuric acid [37][38][39][40], elemental sulfur [41], H 2 S [42], and sulfuric acid [43].…”

Section: Introductionmentioning

confidence: 99%

Post-Synthetic Derivatization of Graphitic Carbon Nitride with Methanesulfonyl Chloride: Synthesis, Characterization and Photocatalysis

et al. 2020

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Bulk graphitic carbon nitride (CN) was synthetized by heating of melamine at 550 °C, and the exfoliated CN (ExCN) was prepared by heating of CN at 500 °C. Sulfur-doped CN was synthesized by heating of thiourea (S-CN) and by a novel procedure based on the post-synthetic derivatization of CN with methanesulfonyl (CH3SO2−) chloride (Mes-CN and Mes-ExCN). The obtained nanomaterials were investigated by common characterization methods and their photocatalytic activity was tested by means of the decomposition of acetic orange 7 (AO7) under ultraviolet A (UVA) irradiation. The content of sulfur in the modified CN decreased in the sequence of Mes-ExCN > Mes-CN > S-CN. The absorption of light decreased in the opposite manner, but no influence on the band gap energies was observed. The methanesulfonyl (mesyl) groups connected to primary and secondary amine groups were confirmed by high resolution mass spectrometry (HRMS). The photocatalytic activity decreased in the sequence of Mes-ExCN > ExCN > CN ≈ Mes-CN > S-CN. The highest activity of Mes-ExCN and ExCN was explained by the highest amounts of adsorbed Acetic Orange 7 (AO7). In addition, in the case of Mes-ExCN, chloride ions incorporated in the CN lattice enhanced the photocatalytic activity as well.

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Sulfur-doped porous graphitic carbon nitride heterojunction hybrids for enhanced photocatalytic H2 evolution

Cited by 70 publications

References 50 publications

Sodium and Sulfur Co‐Doped Graphitic Carbon Nitride: A Novel and Effective Visible Light Driven Photocatalyst with Tunable Bandgap for Degradation of Eosin Yellow

Sodium and Sulfur Co‐Doped Graphitic Carbon Nitride: A Novel and Effective Visible Light Driven Photocatalyst with Tunable Bandgap for Degradation of Eosin Yellow

Sulfur-doped g-C3N4/TiO2 S-scheme heterojunction photocatalyst for Congo Red photodegradation

Post-Synthetic Derivatization of Graphitic Carbon Nitride with Methanesulfonyl Chloride: Synthesis, Characterization and Photocatalysis

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