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MoS2/g-C3N4复合纳米催化剂光催化深度处理造纸废水研究
Advanced Treatment of Papermaking Wastewater by Photocatalysis with MoS2/g-C3N4 Nano-composite Catalyst
收稿日期:2021-06-28  
DOI:10.11980/j.issn.0254-508X.2021.10.009
关键词:  MoS2/g-C3N4  光催化  造纸废水  深度处理
Key Words:MoS2/g-C3N4  photocatalytic  papermaking wastewater  advanced treatment
基金项目:四川省水利厅科研项目《改性田螺壳生物炭对水中三氯生(TCS)的吸附性能及机理研究》(SKY2019-05)。
作者单位邮编
纪丁愈 四川水利职业技术学院四川崇州611231 611231
熊明彪 四川水利职业技术学院四川崇州611231 611231
刘冬 四川水利职业技术学院四川崇州611231 611231
王怡 四川水利职业技术学院四川崇州611231 611231
种秀灵 四川水利职业技术学院四川崇州611231 611231
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摘要:本研究采用N-甲基吡咯烷酮复合MoS2与g-C3N4,制得MoS2/g-C3N4复合纳米催化剂。采用X射线衍射仪(XRD)、X射线光电子能谱仪(XPS)、光致发光光谱仪(PL)和扫描电子显微镜(SEM)对复合纳米催化剂进行表征,并利用MoS2/g-C3N4复合纳米催化剂光催化深度处理造纸废水。结果表明,少量MoS2与g-C3N4复合可提高复合光催化剂的光催化活性,反应时间180 min、pH值5、1.5% MoS2/g-C3N4复合纳米催化剂投加量为2 g/L时,对造纸废水的CODCr去除率和色度去除率最高,分别达到63.4%和83.2%。MoS2/g-C3N4的光催化活性有所增强是由于MoS2与g-C3N4的能带结构匹配,降低了光生电子-空穴的复合几率,从而提高了催化剂的光催化活性。
Abstract:The MoS2/g-C3N4 nano-composite catalyst was prepared via combining MoS2 and g-C3N4 by N-methy1-2-pyrrolidone. The prepared nano-composite catalyst was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), photoluminescence spectroscopy (PL) and scanning electron microscopy(SEM). The nano-composite catalyst were used to advanced treatment by photocatalysis of papermaking wastewater. The results showed that a few MoS2 combined with g-C3N4 could improve the photocatalytic activity of nano-composite catalyst remarkably. The removal efficiency of CODCr and chroma in papermaking wastewater could reach 63.4% and 83.2%,respectively, when react time was 180 min, pH value was 5, dosage of 1.5% MoS2/g-C3N4 was 2 g/L. The enhanced photocatalytic activity of MoS2/g-C3N4 was probably due to the matched band structure between MoS2 and g-C3N4, which could decrease the recombination rate of photo-generated electron and hole to improve the photocatalytic activity of MoS2/g-C3N4 catalyst.
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