In-situ synthesis of sulfur doped carbon nitride microsphere for outstanding visible light photocatalytic Cr(VI) reduction
| Autor: | Chuanfeng Yang, Fangyan Chen, Yanjuan Cui, Sugang Meng, Hao Wang, Ming Li |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
inorganic chemicals
Materials science Heptazine Inorganic chemistry Doping technology industry and agriculture Graphitic carbon nitride chemistry.chemical_element Filtration and Separation 02 engineering and technology Nitride 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Sulfur 0104 chemical sciences Analytical Chemistry Catalysis chemistry.chemical_compound chemistry Photocatalysis lipids (amino acids peptides and proteins) 0210 nano-technology human activities Carbon nitride |
| Zdroj: | Separation and Purification Technology. 199:251-259 |
| ISSN: | 1383-5866 |
| Popis: | Sulfur doped graphitic carbon nitride microspheres were synthesized from in situ solvothermal condensation process using trithiocyanuric acid as sulfur source. The photocatalytic activity for Cr(VI) reduction and mechanism on sulfur doped carbon nitride microspheres were investigated in detail. Structure characterizations reveal that the as-prepared sample has incomplete heptazine heterocyclic ring structure. The sulfur species doped into the lattice of carbon nitride was identified as formation of C S and N S in the hybrid framework. Improved conjugated structure, expanding visible light harvesting and elevated conduction band reduction potential were realized by sulfur doping. The photocatalytic activities of the sulfur-doped carbon nitride were evaluated by Cr(VI) reduction under visible light in neutral aqueous solution. After sulfur doping, the catalysts showed much enhanced Cr(VI) reduction rate, about 24 times higher than un-doped sample. This work provides a new strategy for the preparation of sulfur doped polymer semiconductor from mild solvothermal route for the promising application in toxic heavy metal removal in neutral condition. |
| Databáze: | OpenAIRE |
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