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Black Phosphorus Quantum Dot-Sensitized TiO2 Nanotube Arrays with Enriched Oxygen Vacancies for Efficient Photoelectrochemical Water Splitting

  • Lingxia Zheng
    Lingxia Zheng
    State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014, P. R. China
  • Xiaoying Ye
    Xiaoying Ye
    State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    More by Xiaoying Ye
  • Xiaolei Deng
    Xiaolei Deng
    State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    More by Xiaolei Deng
  • Yongzhi Wang
    Yongzhi Wang
    State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    More by Yongzhi Wang
  • Yijian Zhao
    Yijian Zhao
    State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    More by Yijian Zhao
  • Xiaowei Shi
    Xiaowei Shi
    State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    More by Xiaowei Shi
  • , and 
  • Huajun Zheng*
    Huajun Zheng
    State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou 310014, P. R. China
    *Email: [email protected]
    More by Huajun Zheng
Cite this: ACS Sustainable Chem. Eng. 2020, 8, 42, 15906–15914
Publication Date (Web):September 18, 2020
https://doi.org/10.1021/acssuschemeng.0c04819
Copyright © 2020 American Chemical Society
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Abstract

Photon absorption, charge separation and transportation, and charge-induced reactions at the active sites are the main crucial factors involved in the photoelectrochemical (PEC) water splitting. Herein, a combination of black phosphorus quantum dot (BPQD) sensitization and defect engineering strategies is employed to optimize the PEC performance of one-dimensional TiO2 nanotube array (NTA) photoanodes. The as-prepared TiO2–x/BP electrode exhibits a strong photocurrent density under simulated solar light irradiation, which is almost ∼3 times higher than that of bare TiO2. Specifically, the photocurrent increment of TiO2–x/BP is even larger than the sum of TiO2–x and TiO2/BP, verifying the synergistic effect of oxygen vacancies and BPQD sensitization. The maximum photoconversion efficiency of TiO2–x/BP is as high as 0.35%, while the value of TiO2 NTAs is calculated to be 0.13%. The results reveal that oxygen vacancies and BPQDs in the TiO2–x/BP composite not only facilitate the charge separation and transportation but also enhance the activity and quantity of reactive sites for water oxidation. The present strategy might open new routes to develop high-performance photoelectrodes for water splitting.

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The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acssuschemeng.0c04819.

  • SEM images and CV curves of TiO2 electrodes; TEM–EDX survey spectrum and long-term stability performance of TiO2–x/BP electrodes; UV–vis DRS and PL spectra of BPQDs; magnified XRD patterns, LSV curves, charge injection efficiency, and IPCE curves of different electrodes; chemical composition and contents of elements; and PEC performance comparison (PDF)

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Cited By


This article is cited by 7 publications.

  1. Adyasa Priyadarsini, Bhabani S. Mallik. Aqueous Affinity and Interfacial Dynamics of Anisotropic Buckled Black Phosphorous. The Journal of Physical Chemistry B 2021, 125 (27) , 7527-7536. https://doi.org/10.1021/acs.jpcb.1c03344
  2. Tingsheng Zhou, Lei Li, Jinhua Li, Jiachen Wang, Jing Bai, Ligang Xia, Qunjie Xu, Baoxue Zhou. Electrochemically reduced TiO2 photoanode coupled with oxygen vacancy-rich carbon quantum dots for synergistically improving photoelectrochemical performance. Chemical Engineering Journal 2021, 425 , 131770. https://doi.org/10.1016/j.cej.2021.131770
  3. Shan Shao, Jiujun Deng, Xiaoxin Lv, Haiyan Ji, Ying Xiao, Xingwang Zhu, Kun Feng, Hui Xu, Jun Zhong. Black phosphorus nanoflakes decorated hematite photoanode with functional phosphate bridges for enhanced water oxidation. Chemical Engineering Journal 2021, 425 , 131500. https://doi.org/10.1016/j.cej.2021.131500
  4. Dong Qiu, Chengli He, Yuxuan Lu, Qiaodan Li, Yang Chen, Xiaoli Cui. Assembling γ-graphyne surrounding TiO 2 nanotube arrays: an efficient p–n heterojunction for boosting photoelectrochemical water splitting. Dalton Transactions 2021, 50 (42) , 15422-15432. https://doi.org/10.1039/D1DT01810H
  5. Sanghyuk Cho, Gyeonghye Yim, Jung Tae Park, Hongje Jang. Surfactant-free one-pot synthesis of Au-TiO2 core-shell nanostars by inter-cation redox reaction for photoelectrochemical water splitting. Energy Conversion and Management 2021, 10 , 115038. https://doi.org/10.1016/j.enconman.2021.115038
  6. Tushar Kanta Sahu, Suhaib Alam, Sourav Bhowmick, Manoj Kumar Mohanta, Mohammad Qureshi. Phosphorus nitride nano-dots as a versatile and metal-free support for efficient photoelectrochemical water oxidation. Chemical Communications 2021, 57 (50) , 6157-6160. https://doi.org/10.1039/D1CC01030A
  7. Yong Peng, Chun Hong Mak, Ji-Jung Kai, Minshu Du, Li Ji, Mingjian Yuan, Xingli Zou, Hsin-Hui Shen, Shella Permatasari Santoso, Juan Carlos Colmenares, Hsien-Yi Hsu. Recent progress on post-synthetic treatments of photoelectrodes for photoelectrochemical water splitting. Journal of Materials Chemistry A 2021, 402 https://doi.org/10.1039/D1TA05935A