Synthesis and Visible-light-driven Photocatalytic Activity of CsTi2NbO7@N-doped TiO2 Hybrid Core-shell Structure

被引：0
|
作者：
Cheng T. [1 ,2 ]
Dong P. [2 ]
Gao X. [1 ,2 ]
Meng C. [3 ]
Wang Y. [3 ]
Chen X. [3 ]
Zhang B. [3 ]
Xi X. [3 ]
机构：
[1] School of Materials Science and Engineering, Jiangsu University, Zhenjiang
[2] School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng
[3] School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2021年 / 35卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Core-shell structure; Inorganic non-metallic materials; Nitrogen doping; Titanium dioxide; Visible-light photo-degradation;
D O I：
10.11901/1005.3093.2020.382
中图分类号：
学科分类号：
摘要：
A novel CsTi2NbO7@N-TiO2 core-shell hybrid material was successfully prepared by mixing CsTi2NbO7 with titanium isopropoxide and then calcining with urea in atmosphere. The prepared products were characterized by means of X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible diffuse reflectance absorption spectrum (UV-Vis DRS) and X-ray photoelectron spectroscopy (XPS). It was found that the N doping resulted in the shortening of the band gap of TiO2 and the red-shift of absorption edge, thus achieving the visible light response. Because of the synergistic effect of hybridization, core-shell structure, and N doping, the as-prepared CsTi2NbO7@N-TiO2 hybrid core-shell structural materials not only have strong visible absorption properties, but also exhibit enhanced photocatalytic activity for degradation of methylene blue (MB) under visible light irradiation, resulting from the improvement of carrier separation and migration efficiency due to the existence of the built-in electric field. Moreover, the reaction rate constant of CsTi2NbO7@N-TiO2 hybrid core-shell structural material is about 5.8 times that of CsTi2NbO7. Therefore, it shows good photocatalytic cycle stability. © 2021, Editorial Office of Chinese Journal of Materials Research. All right reserved.
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页码：221 / 230
页数：9
相关论文
共 46 条
  • [1] Chen Y, Lu C, Xu L, Et al., Single-crystalline orthorhombic molybdenum oxide nanobelts: synthesis and photocatalytic properties, CrystEngComm, 12, (2010)
  • [2] Xu L, Yang X, Zhai Z, Et al., EDTA-mediated shape-selective synthesis of Bi2WO6 hierarchical self-assemblies with high visiblelight-driven photocatalytic activities, CrystEngComm, 13, (2011)
  • [3] Zhu G, Hojamberdiev M, Tan C, Et al., Photodegradation of organic dyes with anatase TiO2 nanoparticles-loaded BiOCl nanosheets with exposed {001} facets under simulated solar light, Materials Chemistry and Physics, 147, (2014)
  • [4] Du G, Guo Z, Wang S, Et al., Superior stability and high capacity of restacked molybdenum disulfide as anode material for lithium ion batteries, Chemical communications, 46, (2010)
  • [5] Pelaez M, Nolan N T, Pillai S C, Et al., A review on the visible light active titanium dioxide photocatalysts for environmental applications, Applied Catalysis B: Environmental, 125, (2012)
  • [6] Linsebigler A L, Lu G, Yates T, Photocatalysis on TiO2 surfaces: principles, mechanisms, and selected results, Chemical reviews, 95, (1995)
  • [7] Zhang Y C, Yang M, Zhang G, Et al., HNO3-involved one-step low temperature solvothermal synthesis of N-doped TiO2 nanocrystals for efficient photocatalytic reduction of Cr (VI) in water, Applied Catalysis B: Environmental, 142, (2013)
  • [8] Zhang Y C, Li J, Xu H Y, One-step in situ solvothermal synthesis of SnS2/TiO2 nanocomposites with high performance in visible light-driven photocatalytic reduction of aqueous Cr(VI), Applied Catalysis B: Environmental, 123, (2012)
  • [9] Wang S, Yun J H, Luo B, Et al., Recent progress on visible light responsive heterojunctions for photocatalytic applications, Journal of Materials Science & Technology, 33, (2017)
  • [10] He J, Li Q, Tang Y, Et al., Characterization of HNbMoO6, HNbWO6 and HTiNbO5 as solid acids and their catalytic properties for esterification reaction, Applied Catalysis A: General, 443, (2012)
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