光催化
甲基橙
X射线光电子能谱
材料科学
纳米结构
煅烧
扫描电子显微镜
可见光谱
纳米技术
化学工程
拉曼光谱
透射电子显微镜
兴奋剂
热液循环
水热合成
制氢
光电子学
氢
异质结
光学
化学
催化作用
复合材料
有机化学
物理
工程类
作者
Xuefeng Liu,Zipeng Xing,Yan Zhang,Zhenzi Li,Xiaoyan Wu,Siyu Tan,Xiujuan Yu,Qi Zhu,Wei Zhou
标识
DOI:10.1016/j.apcatb.2016.08.031
摘要
As is well-known, it is a great challenge that the smooth TiO2 nanospheres are coated by MoS2 nanosheets to form the core-shell nanostructure owing to their poor interaction. Herein, we report 3D black N-TiO2-x@MoS2 core-shell nanostructures synthesized by a mild and effective strategy combined with a typical hydrothermal reaction and an in situ solid-state chemical reduction method followed by 350 °C calcination under an argon atmosphere. The prepared samples are characterized in detail by X-ray diffraction, Raman, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The results suggest that the 3D N-TiO2-x@MoS2 photocatalyst is successfully doped with N and Ti3+, and simultaneously coupling with MoS2 to form the core-shell heterojunction nanostructure. The N and Ti3+ co-doped and hybrid heterostructures can effectively utilize visible-light and solar energy to degrade methyl orange and produce hydrogen. The degradation rate of methyl orange and the hydrogen production rate are as high as 91.8% and 1.882 mmol h−1 g−1. To the best of our knowledge, this work is the first instance of combining MoS2 with N and Ti3+ co-doped TiO2, and the proposed photocatalytic mechanism will provide a new perspective for high activity photocatalyst in future.
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