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- W2918637639 abstract "Abstract Photocatalytic oxidation of free cyanide (CN−) in water directly using solar energy is highly desired. However, most of the photocatalysts with effective performance are solely metal-based semiconductors. Herein, the metal-free graphitic carbon nitride nanosheets (g-C3N4-NS) have been prepared and utilized as photocatalysts for oxidation of CN− under visible light. The removal of CN− over g-C3N4-NS can reach 90% after 150 min when the initial concentration of CN− is 0.18 mM and the cyanate (CNO−) is the only product. The ESR and quenching experiment results reveal that the O2 − and 1O2 play significant roles in the photocatalytic oxidation of CN−: first, the oxygen can be reduced by the photogenerated electrons (e−) from g-C3N4-NS to generate O2 −, O2 − can be further reduced by e− to form the hydroperoxide anion (HO2−) under the reaction conditions, then O2 − and HO2− can be converted to 1O2, finally the CN− can be oxidized by 1O2 to CNO−. In addition, the recycle experiment and the characterization results of the g-C3N4-NS indicate that the g-C3N4-NS is stable." @default.
- W2918637639 created "2019-03-11" @default.
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- W2918637639 date "2019-08-01" @default.
- W2918637639 modified "2023-09-29" @default.
- W2918637639 title "Photocatalytic oxidation of free cyanide over graphitic carbon nitride nanosheets under visible light" @default.
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- W2918637639 doi "https://doi.org/10.1016/j.cej.2019.03.025" @default.
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