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Hydrothermally Treating High-Ti Cinder for a Near Full-Sunlight-Driven Photocatalyst toward Highly Efficient H2 Evolution

  • Jiale Xie
    Jiale Xie
    Institute of Materials Science and Devices, Suzhou University of Science and Technology, Kerui Road, Suzhou 215009, People’s Republic of China
    More by Jiale Xie
  • Pingping Yang
    Pingping Yang
    Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University, 2 Tiansheng Road, Chongqing 400715, People’s Republic of China
  • Chunxian Guo
    Chunxian Guo
    Institute of Materials Science and Devices, Suzhou University of Science and Technology, Kerui Road, Suzhou 215009, People’s Republic of China
    More by Chunxian Guo
  • Canyu Zhong
    Canyu Zhong
    Panxi Science and Technology Innovation Center & Panzhihua Engineering Technology Research Center for Graphene, Panzhihua University, Airport Road, Panzhihua 617000, People’s Republic of China
    More by Canyu Zhong
  • Xiaodeng Wang
    Xiaodeng Wang
    Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University, 2 Tiansheng Road, Chongqing 400715, People’s Republic of China
    School of Physics, Chongqing University, University City South Road, Chongqing 401331, People’s Republic of China
  • , and 
  • Chang Ming Li*
    Chang Ming Li
    Institute of Materials Science and Devices, Suzhou University of Science and Technology, Kerui Road, Suzhou 215009, People’s Republic of China
    Institute for Clean Energy & Advanced Materials, Faculty of Materials and Energy, Southwest University, 2 Tiansheng Road, Chongqing 400715, People’s Republic of China
    *E-mail: [email protected]
Cite this: ACS Sustainable Chem. Eng. 2018, 6, 4, 5076–5084
Publication Date (Web):March 5, 2018
https://doi.org/10.1021/acssuschemeng.7b04756
Copyright © 2018 American Chemical Society
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Abstract

A major drawback of conventional photocatalysts like TiO2 is the limit of only working under ultraviolet irradiation. As a solution, visible-light-driven photocatalysts have been explored in recent years but full-sunlight-driven photocatalysts are still lacking. Herein, multielement-codoped (Mn, Fe, Si, Al, S, F, etc.) TiO2 nanomaterials were prepared from an industrial high-Ti cinder (HiTi) by a two-step hydrothermal method using NaOH and NH4F (or H2O) as morphology controlling agents. The prepared HiTi photocatalyst exhibits a strong absorption at near full-sunlight spectrum (300–800 nm). Among all TiO2-based photocatalysts without any noble metal cocatalyst, the photocatalytic H2 evolution rate on NaOH- and H2O-hydrothermally treated HiTi (HiTi-TiO2) is remarkably superior to the reference P25 TiO2 powders by a factor of 3.8 and thus is the highest. However, NaOH- and NH4F-treated HiTi (HiTi-TiO2-F) shows a lower photoreactivity than HiTi-TiO2 does. Mechanistic studies show that the multielement-doped TiO2 can synergistically harvest full span sunlight to greatly increase light absorption, while suppressing the charge recombination and reducing the reaction barriers for efficient water splitting. Importantly, the amount of produced industrial cinder is huge in China, and it is dumped on the ground in very large mounds, which results in serious pollution. This study may open a promising recycling approach to treat the waste for sustainable energy use.

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The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acssuschemeng.7b04756.

  • Emission spectrum of 300 W Xe lamp, EDS and XPS compositional analysis, stability test of HiTi photocatalyst, reproducibility test of HiTi-TiO2, cyclic voltammetry curves, XRD patterns of HiTi-TiO2-F and HiTi-TiO2, HRTEM image of Fe2O3/TiO2 heterojunction, contact angle testing of HiTi-TiO2, UV–vis-IR spectroscopy of HiTi-TiO2, and some control experiments (PDF)

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Cited By


This article is cited by 2 publications.

  1. Ahmad Nawaz, Aneek Kuila, Nirmalendu Sekhar Mishra, Kah Hon Leong, Lan Ching Sim, Pichiah Saravanan, Min Jang. Challenges and implication of full solar spectrum-driven photocatalyst. Reviews in Chemical Engineering 2021, 37 (4) , 533-560. https://doi.org/10.1515/revce-2018-0069
  2. Qianqian Chen, Chunran Zhao, Yan Wang, Yijing Chen, Yueyin Ma, Zhiqiang Chen, Jingxiong Yu, Ying Wu, Yiming He. Synthesis of MoS2/YVO4 composite and its high photocatalytic performance in methyl orange degradation and H2 evolution. Solar Energy 2018, 171 , 426-434. https://doi.org/10.1016/j.solener.2018.06.112