摘要
采用静电纺丝技术结合高温煅烧制备了一系列不同W/Nb摩尔比的WO_(3)-Nb_(2)O_(5)电纺异质结纳米纤维,探究了WO_(3)-Nb_(2)O_(5)电纺异质结纳米纤维的结构、性质及WO_(3)含量对其光催化性能的影响。结果表明,WO_(3)的引入明显改善了光催化剂的光吸收能力并有效抑制了光生载流子的闭合。在以甲基橙作为目标污染物的光催化降解实验中,WO_(3)-Nb_(2)O_(5)电纺异质结纳米纤维展现了良好的光催化性能,当W/Nb摩尔比为15%时,WO_(3)-Nb_(2)O_(5)电纺异质结纳米纤维的光催化活性最高。在可见光照射150 min后,其对甲基橙的降解率达到96.4%,动力学常数为0.0222 min^(-1),分别是纯Nb_(2)O_(5)和WO_(3)纳米纤维的13.1和5.8倍。
A series of WO_(3)-Nb_(2)O_(5)electrospun heterojunction nanofibers(WN NFs)with different W/Nb molar ratios were fabricated based on an electrospinning technology combined with calcination treatment.The structure and properties as well as the effect of WO_(3)content on the photocatalytic activity of WN NFs were investigated.The results confirm that the coupling of WO_(3)with Nb_(2)O_(5)results in a remarkable red shift in the optical response of the heterojunction samples and inhibits the recombination of photoinduced carriers.In the photocatalytic degradation experiment towards methyl orange as the target pollutant,the as-prepared WN NFs exhibit remarkably enhanced photocatalytic activity.Particularly,the WN NFs with W/Nb molar ratio of 15%demonstrate the largest degradation rate,exhibiting a prominent value of 96.4%in 150 min under visible light irradiation.And the kinetic constant is 0.0222 min^(-1),approximately 13.1-fold and 5.8-fold higher than these of pure Nb_(2)O_(5)and WO_(3)nanofibers,respectively.
作者
王璐
韩萍芳
Wang Lu;Han Pingfang(College of Biotechnology and Pharmaceutical Engineering,Nanjing Tech University,Nanjing 211816,China;Nantong Vocational University,Nantong 226007,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2022年第11期4251-4257,共7页
Rare Metal Materials and Engineering
基金
南通市科技计划项目(JC2021165,JC2021063)
江苏省高等学校自然科学研究面上项目(18KJB610016)。
