Bi@Bi2Sn2O7/TiO2等离子体复合纤维的制备及增强的光催化产氢活性
Preparation of Bi@Bi2Sn2O7/TiO2 Plasmonic Composite Fibers with Enhanced Photocatalytic Hydrogen Generation Activity
作者单位E-mail
李跃军 白城师范学院化学学院, 白城 137000  
曹铁平 白城师范学院化学学院, 白城 137000 bcctp2008@163.com 
赵艳辉 白城师范学院化学学院, 白城 137000  
孙大伟 白城师范学院化学学院, 白城 137000
吉林师范大学化学学院, 四平 136000 
 
王霞 白城师范学院化学学院, 白城 137000  
摘要: 以电纺TiO2纳米纤维为基质,采用一步水热法合成了Bi@Bi2Sn2O7/TiO2等离子体复合纤维光催化剂。利用X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)、高分辨透射电镜(HRTEM)、紫外-可见漫反射(UV-Vis DRS)和光致发光光谱(PL)等分析测试手段对样品的物相、形貌和光电性能等进行表征。以三乙醇胺为电子给体,研究了Bi@Bi2Sn2O7/TiO2复合纤维光催化裂解水制氢的反应过程。结果表明:在水热过程中,Bi2Sn2O7构筑在TiO2纳米纤维表面形成p-n结的同时,部分Bi3+被葡萄糖还原成金属Bi沉积在Bi2Sn2O7上。金属Bi的等离子体共振效应与p-n结的协同作用,有效提高了样品的光催化活性,产氢速率达到7.26 mmol·h-1·g-1
关键词: 复合纤维  等离子体  光催化  制氢
基金项目: 国家自然科学基金(No.21573003);国家级大学生创新创业训练计划项目(No.201810206003)资助。
Abstract: By employing electrospun TiO2 nanofiber as substrate, Bi@Bi2Sn2O7/TiO2 plasmonic composite fibers were prepared via one-step hydrothermal method. The composition, morphology and optical properties were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), high-resolution transmission electron microscope (HRTEM), ultraviolet-visible diffuse reflection spectra (UV-Vis DRS) and photoluminescence spectroscopy (PL) analysis. The photocatalytic water splitting for hydrogen evolution was investigated over Bi@Bi2Sn2O7/TiO2 plasmonic composite fibers with triethanolamine as the donor residue. The results showed that the Bi nanoparticles were generated onto Bi2Sn2O7 nanoparticle via the in situ reduction of Bi3+ by glucose, meanwhile grew on the TiO2 nanofibers surface. The enhanced photocatalytic activity of the Bi@Bi2Sn2O7/TiO2 plasmonic composites fibers can be further improved mainly attributed to the formation of high-quality p-n heterojunctions between Bi2Sn2O7 and titanium dioxide, the plasma resonance effect of metal bismuth, and the synergistic effect of plasma resonance effect and p-n heterojunction. The corresponding H2 production rate was 7.26 mmol·h-1·g-1.
Keywords: composite fibers  plasma  photocatalysis  hydrogen generation
投稿时间:2019-03-16 修订日期:2019-06-08
摘要点击次数:  13
全文下载次数:  10
查看全文  查看/发表评论  下载PDF阅读器
Support information: