树枝状PVDF纳米纤维膜负载TiO_(2)吸附-光催化降解染料废水  

Adsorption-Photocatalytic Degradation of Dye Wastewater for Tree-like PVDF Nanofibrous Membrane Supported TiO_(2)

作　　者：石现兵 王涛[1] 吕明泽 赵晋[1] 韩振邦[1] SHI Xianbing;WANG Tao;LYU Mingze;ZHAO Jin;HAN Zhenbang(School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学纺织科学与工程学院,天津300387

出　　处：《材料导报》2023年第4期52-57,共6页Materials Reports

基　　金：国家自然科学基金(52003192);天津市技术创新引导专项基金(20YDTPJC00920);天津市应用基础与前沿技术研究计划(15JCQNJC06300)。

摘　　要：通过添加有机支化盐四丁基氯化铵水合物,采用静电纺丝技术制备了以树枝状聚偏氟乙烯(PVDF)纳米纤维膜为载体的二氧化钛(TiO_(2))光催化剂,对其表面形貌及结构进行了表征分析,并以罗丹明B为目标污染物,考察了其对染料废水的吸附和光催化降解性能。结果表明,树枝状PVDF纳米纤维膜由直径为310 nm的主干纤维和直径为5~100 nm的分支纤维构成,TiO_(2)能够均匀分布于主干和分支纤维表面。与常规PVDF纳米纤维膜负载TiO_(2)光催化剂相比,这种树枝状纳米纤维膜显示出更高的亲水性和比表面积,使其在室温下对水中罗丹明B的平衡吸附量提升了5.4倍;同时该材料也显示出更优异的光催化性能,在紫外光和可见光下对染料的降解速率常数分别提升了1.0倍、2.3倍。The tree-like polyvinylidene fluoride(PVDF)nanofibrous membrane supported titanium dioxide(TiO_(2))photocatalyst was prepared using an electrospinning method by adding tetrabutylammonium chloride hydrate as the organic branched salt.The surface morphology and structure of the photocatalyst were characterized,and then its adsorption and photocatalytic degradation performance on the removal of dye wastewater was investigated using rhodamine B as the target pollutant.The results showed that the tree-like PVDF nanofibrous membrane consists of trunk fibers(310 nm diameter)and branching fibers(5—100 nm diameter),and TiO_(2)could be uniformly distributed on the surface of both trunk and branching fibers.Compared with normal PVDF nanofibrous membrane supported TiO_(2)photocatalyst,this tree-like nanofibrous membrane showed much higher hydrophilicity and specific surface area,which increased the equilibrium adsorption of rhodamine B in water at room temperature by 5.4 times;it also exhibited better photocatalytic performance,and the degradation rate constants of the dye under UV and visible light were increased by 1.0 and 2.3 times,respectively.

关 键 词：纳米纤维 结构调控 二氧化钛(TiO_(2)) 光催化 吸附 

分 类 号：TB324[一般工业技术—材料科学与工程]