| 新型g-C3N4/CuS复合材料的制备及光催化研究 |
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| 引用本文： | 赵海亮,岳文丽,陈波.新型g-C3N4/CuS复合材料的制备及光催化研究[J].硅酸盐通报,2017,36(10):3361-3367. |
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| 作者姓名： | 赵海亮 岳文丽 陈波 |
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| 作者单位： | 昆明理工大学环境科学与工程学院,昆明,650500 |
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| 基金项目： | 国家自然科学基金青年基金项目(21307048) |
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| 摘 要： | 一步水热法合成CuS修饰的石墨相氮化碳(g-C3N4/CuS)复合光催化剂,通过FE-SEM、XRD、FTIR、UV-Vis-DRS等手段对其进行了表征,利用Cr(VI)溶液考察了g-C3N4/CuS在可见光下的光催化还原性能.实验结果表明,g-C3N4/CuS复合光催化剂的光催化活性明显优于单一的g-C3N4和CuS.可见光照射下,180 min内Cr(VI)的去除率可达70％以上.CuS的引入不仅扩宽了g-C3N4的可见光吸收范围,而且降低了g-C3N4光生电子和空穴的复合率,从而显著提高g-C3N4的光催化活性.该复合材料的催化活性受溶液的pH值影响较大,酸性条件下更有利于光催化反应的进行;共存低浓度腐殖酸对Cr(VI)的去除没有显著影响.g-C3N4/CuS具有良好的可见光催化活性,可用于废水中Cr(VI)的光催化还原去除.
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| 关 键 词： | 石墨相氮化碳(g-C3N4) g-C3N4/CuS复合材料 光催化还原 Cr(VI) |
Synthesis and Photocatalytic Property of g-C3N4/CuS Composites |
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| ZHAO Hai-liang,YUE Wen-li,CHEN Bo.Synthesis and Photocatalytic Property of g-C3N4/CuS Composites[J].Bulletin of the Chinese Ceramic Society,2017,36(10):3361-3367. |
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| Authors: | ZHAO Hai-liang YUE Wen-li CHEN Bo |
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| Abstract: | A"one-pot"hydrothermal route was used to fabricate CuS modified graphitic carbon nitride ( g-C3N4/CuS ) composite photocatalyst . The sample was characterized by a series of analytical techniques such as SEM , XRD, FT-IR, DRS etc.The photocatalytic activity of the as-prepared catalyst was evaluated by reducing of Cr ( VI ) under visible light irradiation . The results show that the photocatalytic activity of g-C3N4/CuS composite photocatalyst is superior to that of pure g-C3N4 and CuS. Under visible light excitation , the removal rate of Cr ( VI) is up to 70％within 180 min.The introduction of CuS not only broadens the range of visible light absorption , but also slows down the recombination rate of photogenerated electrons and holes , thus improving the photocatalytic activity of g-C3N4/CuS.The catalytic activity of the composites is greatly influenced by the pH value of the solution , and the photocatalytic reaction is more favorable under acidic conditions .The coexistence of low concentration of humic acid has no significant effect on the removal of Cr ( VI ) .The g-C3N4/CuS showes excellent catalytic activity under visible light and can be used for photocatalytic reduction of Cr (VI) in wastewater. |
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| Keywords: | graphitic carbon nitride ( g-C3N4 ) g-C3N4/CuS composite material photocatalytic reduction Cr( VI) |
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