Science China Materials

, Volume 61, Issue 6, pp 831–838 | Cite as

Maximizing the visible light photoelectrochemical activity of B/N-doped anatase TiO2 microspheres with exposed dominant {001} facets

  • Xingxing Hong (洪星星)
  • Yuyang Kang (康宇阳)
  • Chao Zhen (甄超)
  • Xiangdong Kang (康向东)
  • Li-Chang Yin (尹利长)
  • John T S Irvine
  • Lianzhou Wang (王连洲)
  • Gang Liu (刘岗)
  • Hui-Ming Cheng (成会明)
Articles
  • 64 Downloads

Abstract

Anatase TiO2 microspheres with exposed dominant BBBBB001BBBBB facets were doped with interstitial boron to have a concentration gradient with the maximum concentration at the surface. They were then further doped with substitutional nitrogen by heating in an ammonia atmosphere at different temperatures from 440 to 560°C to give surface N concentrations ranging from 7.03 to 15.47 at%. The optical absorption, atomic and electronic structures and visible-light photoelectrochemical water oxidation activity of these materials were investigated. The maximum activity of the doped TiO2 was achieved at a nitrogen doping temperature of 520°C that gave a high absorbance over the whole visible light region but with no defect-related background absorption.

Keywords

photoelectrochemistry red TiO2 water splitting doping 

B/N掺杂富含{001}晶面锐钛矿TiO2的最佳可见光光电催化水氧化活性研究

摘要

本文以锐钛矿TiO2微米球光催化材料为研究对象, 其表面主要由BBBBB001BBBBB晶面组成, 间隙掺杂硼原子在微米球中呈浓度梯度分布, 浓度 最高点位于表面. 通过对其在氨气气氛、不同温度下(440–560°C)进行热处理, 可实现氮替代晶格氧的掺杂, 氮原子掺杂的浓度随着热处理 温度的增加, 由7.03增加到15.47 at%. 随着掺杂氮浓度的增加, 所得掺杂TiO2微米球的可见光吸收强度相应提高. 进一步研究所得掺杂TiO2 微米球的可见光光吸收、原子和电子结构与可见光光电催化水氧化活性的关联特性, 发现在520°C下所得氮掺杂TiO2的可见光光电催化 水氧化活性最大, 该样品吸收光谱的显著特征是在可见光区吸光率高, 且没有与缺陷相关联的背底吸收.

Notes

Acknowledgments

This work was supported by the Major Basic Research Program, Ministry of Science and Technology of China (2014CB239401), the National Natural Science Fundation of China (51422210, 21633009, 51629201 and 51521091), the Key Research Program of Frontier Sciences CAS (QYZDB-SSW-JSC039). Liu G thanks Newton Advanced Fellowship.

Supplementary material

40843_2018_9234_MOESM1_ESM.pdf (504 kb)
Supplementary Information

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Xingxing Hong (洪星星)
    • 1
    • 2
  • Yuyang Kang (康宇阳)
    • 1
    • 2
  • Chao Zhen (甄超)
    • 1
  • Xiangdong Kang (康向东)
    • 1
  • Li-Chang Yin (尹利长)
    • 1
  • John T S Irvine
    • 3
  • Lianzhou Wang (王连洲)
    • 4
  • Gang Liu (刘岗)
    • 1
    • 2
  • Hui-Ming Cheng (成会明)
    • 1
    • 5
    • 6
  1. 1.Shenyang National Laboratory for Materials ScienceInstitute of Metal Research, Chinese Academy of SciencesShenyangChina
  2. 2.School of Materials Science and EngineeringUniversity of Science and Technology of ChinaShenyangChina
  3. 3.School of ChemistryUniversity of St. AndrewsFifeUK
  4. 4.Nanomaterials CentreSchool of Chemical Engineering and AIBN, the University of Queensland, St LuciaBrisbaneAustralia
  5. 5.Tsinghua-Berkeley Shenzhen InstituteTsinghua UniversityShenzhenChina
  6. 6.Center of Excellence in Environmental StudiesKing Abdulaziz UniversityJeddahSaudi Arabia

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