Sulfur/g-C3N4 Composites with Enhanced Visible Light Photocatalytic Activity
Composite photocatalysts consisting of different ratios of sulfur and graphitic carbon nitride (S/g-C3N4) were prepared by chemical reduction. The resulted S/g-C3N4 composite photocatalysts were characterized and their photocatalytic activity was evaluated using rhodamine B as a probe. The S/g-C3N4 exhibits obviously enhanced photocatalytic activity under visible light irradiation, which is much higher than that of pure sulfur and g-C3N4. The S/g-C3N4 composite was very stable during the reaction and can be used repeatedly. The synergistic effect between sulfur and g-C3N4 was found to be responsible for the improvement of the separation of photogenerated electrons and holes. The holes (h +) and superoxide (•O– 2) were the main active species in the photocatalytic degradation of rhodamine B. The study provides new insight to develop high performance composite photocatalysts without any metal oxide or metal sulfide for environmental remediation.
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Document Type: Research Article
Publication date: December 1, 2014
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