中南民族大学学报（自然科学版）2023，Vol.42Issue(3)：289-299,11.DOI:10.20056/j.cnki.ZNMDZK.20230301
硫氮共掺杂的片状镶嵌立方中空TiO2纳米晶的制备及其可见光催化性能
Fabrication of sulfur/nitrogen co-doped nanoflake inlaid with cubic hollow TiO2 nanocrystals and enhancing visible-light photocatalytic performance
摘要
Abstract
S/N co-doped nanoflakes inlaid with cubic hollow TiO2 nanocrystals (SN-CHT) with different doping level were synthesized by alcohol-thermal method for promoting the photocatalytic activity in visible-light. The morphology, optical and photocatalytic behavior of as-prepared samples were studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier Transform infrared spectroscopy (FT-IR), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), Photoluminescence (PL), Mott-Schottky and RhB degradation experiments. The results demonstrated that the SN-CHT samples with an optimum methionine content of 0.25 g exhibited the highest photocatalytic activity, which was 3.17 times that of the pristine cubic hollow TiO2 nanocrystals. The visible-light degradation rate of RhB reached 99.9％ after 90 min and the first-order kinetic constant was 0.86×10-2 min-1. The visible-light photocatalytic activity was mainly attributed to the formation of a new doping level and the narrowing of the band gap of TiO2 after the introduction of sulfur and nitrogen, which promoted the separation of photogenerated electron-hole pairs, as confirmed by the Mott-Schottky plot and Tauc plot. Overall, co-modification of cubic hollow TiO2 nanocrystal with S/N elements showed promising future for improving photocatalytic performance.关键词
片状镶嵌立方中空TiO2纳米晶/醇热法/S/N共掺杂/可见光催化Key words
flake inlaid cubic hollow TiO2 nanocrystals/alcohol-thermal method/S/N co-doped/visible-light photocatalysis分类
化学化工引用本文复制引用
卢燕飞,张成江,李襄宏,陈连清..硫氮共掺杂的片状镶嵌立方中空TiO2纳米晶的制备及其可见光催化性能[J].中南民族大学学报（自然科学版）,2023,42(3):289-299,11.基金项目
国家自然科学基金资助项目(52272102) （52272102）
人事部留学人员科技活动择优资助项目(BZY13007) （BZY13007）
湖北省杰出青年基金资助项目(2013CFA034) （2013CFA034）
湖北省青年英才开发计划资助项目(RCJH15001) （RCJH15001）
