C掺杂g-C_(3)N_(4)/PVDF纳米纤维膜的制备及其可见光降解性能研究  

Preparation of C-Doped g-C_(3)N_(4)/PVDF Nanofiber Membrane and Its Degradation Performance under Visible Light

作　　者：薛淑滢 冯嫄淼 张丽莉 雷彩虹[1,2] 朱海霖 余媛[1,2] XUE Shuying;FENG Yumiao;ZHANG Lii;LEI Caihong;ZHU Haiin;YU Yuan(Zhejiang Sci-Tech University,Zhejiang Key Laboratory of Fiber Materials and Processing Technology,Hangzhou 310018,China;Zhejiang Modern Textile Technology Innovation Center,Shaoxing 312000,China)

机构地区：[1]浙江理工大学浙江省纤维材料和加工技术研究重点实验室,浙江杭州310018 [2]浙江省现代纺织技术创新中心,浙江绍兴312000

出　　处：《水处理技术》2024年第2期83-89,共7页Technology of Water Treatment

基　　金：重点研发计划项目(2021YFB3801502)。

摘　　要：本文通过高温煅烧乙酰胺和尿素混合物,成功制备了在可见光下具有优异光催化降解性能的C掺杂g-C_(3)N_(4)材料,然后将C掺杂g-C_(3)N_(4)和PVDF共混,通过静电纺丝制备了具有优异光催化性能的C掺杂g-C_(3)N_(4)/PVDF复合纳米纤维膜。结果表明,当乙酰胺与尿素的质量比为5%时,所制备的C掺杂g-C_(3)N_(4)粉末的光催化性能较好,乙酰胺的掺杂改性既改变了g-C_(3)N_(4)形貌结构,又改善g-C_(3)N_(4)的禁带宽度,从而进一步有效提高了C掺杂g-C_(3)N_(4)材料的光催化活性;当粉末掺杂比为12%时,所制备的PVDF纳米纤维复合膜光催化降解罗丹明B的效率达89.12%;复合纤维膜经过4个循环的光催化降解实验后,对罗丹明B的光催化降解效率保持在80%以上,解决了传统光催化剂难以回收和催化剂易被包覆而失效的问题。In this paper,C-doped g-C_(3)N_(4) materials with excellent photocatalytic degradation performance under visible light were successfully prepared by calcining the mixture of acetamide and urea at high temperatures.Then the C-doped g-C_(3)N_(4)/PVDF composite nanofiber films with excellent photocatalytic performance were prepared by electrospinning.The results showed that when the mass ratio of acetamide to urea is 5%,the photocatalytic activity of C-doped g-C_(3)N_(4) powder is better.The doping modification of acetamide not only changes the morphology and structure of g-C_(3)N_(4),but also improves the band gap of g-C_(3)N_(4),thus further improving the photocatalytic activity of C-doped g-C_(3)N_(4) material effectively.When the powder doping ratio is 12%,the photocatalytic degradation efficiency of rhodamine B by the prepared PVDF nanofiber composite membrane reaches 89.12%.After four cycles of photocatalytic degradation experiments,the photocatalytic degradation efficiency of rhodamine B by composite fiber membrane remained above 80%.This strategy solved the problems that the traditional photocatalyst was difficult to recover and the catalyst was easy to coat and failed.

关 键 词：聚偏氟乙烯 静电纺丝 碳掺杂改性 氮化碳 光催化 

分 类 号：TQ028.8[化学工程]