Carbon Quantum Dots sensitized Vertical WO3 Nanoplates with Enhanced Photoelectrochemical Properties

Zhefei Zhao, Teera Butburee, Piangjai Peerakiatkhajohn, Miaoqiang Lyu, Songcan Wang, Lianzhou Wang, Huajun Zheng

科研成果: 期刊稿件文章同行评审

29 引用 (Scopus)

摘要

WO3 nanoplates (WO3NP) sensitizing with carbon quantum dots (CQDs) photoanode was successfully fabricated by simple hydrothermal and immersing process under mild temperature. The as-prepared composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM, Raman spectrometer and ultraviolet visible spectrometry (UV-vis). The WO3 photoanode after CQDs loading exhibited an enhanced photocurrent density of ∼1.18 mA cm−2 at 1.23 V vs RHE, compared to 0.96 mA cm−2 of pristine WO3 under simulated solar light illumination. Moreover, the modified WO3 nanoplates with CQDs show a superior ability to capture visible light, resulting in more than 1.6 folds of photocurrent density enhancement. Meanwhile, a lower onset potential can be obtained after sensitizing, which is caused by the change of band energy positions. Notably, this efficient sensitization of CQDs could introduce a promising route to improve the light harvesting and efficiency of photoelectrochemical properties for WO3 based photoanode.

源语言英语
页(从-至)2772-2777
页数6
期刊ChemistrySelect
1
11
DOI
出版状态已出版 - 16 7月 2016
已对外发布

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