摘要
本研究采用N-甲基吡咯烷酮复合MoS_(2)与g-C_(3)N_(4),制得MoS_(2)/g-C_(3)N_(4)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MoS_(2)/g-C_(3)N_(4)复合纳米催化剂光催化深度处理造纸废水。结果表明,少量MoS_(2)与g-C_(3)N_(4)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%MoS_(2)/g-C_(3)N_(4)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%。MoS_(2)/g-C_(3)N_(4)的光催化活性有所增强是由于MoS_(2)与g-C_(3)N_(4)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。
The MoS_(2)/g-C_(3)N_(4) nano-composite catalyst was prepared via combining MoS_(2) and g-C_(3)N_(4) 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 MoS_(2) combined with g-C_(3)N_(4) 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%MoS_(2)/g-C_(3)N_(4) was 2 g/L.The enhanced photocatalytic activity of MoS_(2)/g-C_(3)N_(4) was probably due to the matched band structure between MoS_(2) and g-C_(3)N_(4),which could decrease the recombination rate of photo-generated electron and hole to improve the photocatalytic activity of MoS_(2)/g-C_(3)N_(4) catalyst.
作者
纪丁愈
熊明彪
刘冬
王怡
种秀灵
JI Dingyu;XIONG Mingbiao;LIU Dong;WANG Yi;ZHONG Xiuling(Sichuan Water Conservancy Vocational and Technical College,Chongzhou,Sichuan Province,611231)
出处
《中国造纸》
CAS
北大核心
2021年第10期57-62,共6页
China Pulp & Paper
基金
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)。
