Effect of Nitrogen Doping Level on the Performance of N‐Doped Carbon Quantum Dot/TiO<sub>2</sub> Composites for Photocatalytic Hydrogen Evolution

DOI Web Site Web Site 2 Citations
  • Run Shi
    Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
  • Zi Li
    Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
  • Huijun Yu
    Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
  • Lu Shang
    Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
  • Chao Zhou
    Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
  • Geoffrey I. N. Waterhouse
    School of Chemical Sciences The University of Auckland Auckland 1142 New Zealand
  • Li‐Zhu Wu
    Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
  • Tierui Zhang
    Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

Description

<jats:title>Abstract</jats:title><jats:p>Carbon quantum dots (CQDs) have attracted widespread interest for photocatalytic applications, owing to their low cost and excellent electron donor/acceptor properties. However, their advancement as visible‐light photosensitizers in CQDs/semiconductor nanocomposites is currently impaired by their poor quantum yields (QYs). Herein, we describe the successful fabrication of a series of nitrogen‐doped CQDs (NCDs) with N/C atomic ratios ranging from 0.14–0.30. NCDs with the highest N‐doping level afforded a remarkable external QY of 66.8 % at 360 nm, and outstanding electron transfer properties and photosensitization efficiencies when physically adsorbed on P25 TiO<jats:sub>2</jats:sub>. A NCDs/P25‐TiO<jats:sub>2</jats:sub> hybrid demonstrated excellent performance for hydrogen evolution in aqueous methanol under both UV and visible‐light illumination relative to pristine P25 TiO<jats:sub>2</jats:sub>. Controlled nitrogen doping of CQDs therefore represents a very effective strategy for optimizing the performance of CQDs/semiconductor hybrid photocatalysts.</jats:p>

Journal

  • ChemSusChem

    ChemSusChem 10 (22), 4650-4656, 2017-07-31

    Wiley

Citations (2)*help

See more

Report a problem

Back to top