摘要
为了同时提高催化剂的光催化和回收能力,以聚丙烯腈(PAN)和钛酸四丁酯(TBT)作为碳纳米纤维(CNFs)和TiO2前驱体,通过静电纺丝和热处理方法制备了TiO2/CNFs复合材料,并通过SEM、XRD、Raman、UV-vis分光光度计等对TiO2/CNFs复合材料的形貌、晶体结构、光吸收性能、导电性和光催化性能进行了研究。结果表明:随TBT添加量的逐渐增多,TiO2/CNFs复合材料在热处理过程中卷曲形态逐渐消失,并且TBT在碳化过程中完全转化为锐钛矿TiO2;TiO2/CNFs复合材料光吸收边缘由纯TiO2的紫外光区扩展至可见光区,提高了催化剂对太阳光的利用率;同时,在模拟太阳光照射180 min,TiO2/CNFs复合材料对RhB的光催化降解率最大可达到95.71%,并且在连续重复使用5次后光催化降解效率仍可达到约90%。
To enhance the photocatalysis and recycling abilities of catalyst simultaneously,polyacrylonitrile(PAN)and tetrabutyltitanate(TBT)were used as carbon-nanofibers(CNFs)and TiO2 precursors,and TiO2/CNFs composite materials were successfully prepared via electrospinning and heat treatment,and its morphology,crystal structure,optical performance and photocatalytic properties were studied by SEM,XRD,Raman,UV-vis Spectrophotometer and so on.The results show that the crimp shape of the composite material gradually disappears during heat treatment,and TBT is completely transformed into anatase TiO2 during carbonization with the increase of TBT content.The absorption edge of TiO2/CNFs composite material is extended from the ultraviolet region of pure TiO2 to visible,which can improve the utilization of sunlight.At the same time,after simulated solar irradiation for 180 min,the maximum photocatalytic degradation rate of RhB by TiO2/CNFs composite material reaches 95.71%.Moreover,the photocatalytic degradation efficiency can still reach about 90%after repeated useage for 5 times.
作者
于翔
张雪寅
李如洋
赵亚浩
卢晓龙
YU Xiang;ZHANG Xueyin;LI Ruyang;ZHAO Yahao;LU Xiaolong(Department of Material and Chemical Engineering,Henan University of Engineering,Zhengzhou 450007,China;School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454001,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2020年第12期3177-3183,共7页
Acta Materiae Compositae Sinica
