IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v256y2026ipis0960148125023699.html

Enhanced conversion of glucose to HMF by effectively modulating Sr2+ and oxygen vacancy content in TiO2 with Ca as sacrificial agent

Author

Listed:
  • Liu, Yongchen
  • Hou, Pan
  • Ma, Mingwei
  • Xue, Wei
  • Liu, Wenzheng
  • Chen, Enpeng
  • Shi, Maqian
  • Wang, Zixing
  • Yue, Huijuan
  • Tian, Ge
  • Feng, Shouhua

Abstract

The efficient conversion of glucose to 5-hydroxymethylfurfural (HMF) is hindered by the challenge of precisely regulating acidic sites in metal oxide catalysts. To address this, we developed a novel sacrificial agent strategy based on calcium ions that synergistically modulates strontium ion doping and oxygen vacancy formation within titanium dioxide-based catalysts. By leveraging the Ca2+-promoted Sr2+ chelation with ethylenediaminetetraacetic acid (EDTA) in perovskite precursors (CaTiO3/SrTiO3), we achieved precise control over Sr2+ content (SrxTiE series, x = 2–8) and oxygen vacancy density. An appropriate amount of Sr2+ doping promoted the formation of Brønsted acid (B-acid) sites by disrupting the Ti-O-Ti oxygen bridge. Optimal Sr2+ doping (Sr2TiE) maximized Brønsted/Lewis acid synergy (L/B ratio = 0.31), increasing total acid sites by 160 % (78.08 μmol/g vs. 30 μmol/g) compared to undoped TiO2 and generating the highest oxygen vacancy concentration (14.09 %). Under optimized conditions (160 °C for 3 h in a VTHF:VH2O ratio of 3:1), Sr2TiE delivered superior performance with 94.1 % glucose conversion and 46.2 % HMF yield. This work provides a generalizable approach for designing oxide catalysts via targeted vacancy and acidity engineering.

Suggested Citation

  • Liu, Yongchen & Hou, Pan & Ma, Mingwei & Xue, Wei & Liu, Wenzheng & Chen, Enpeng & Shi, Maqian & Wang, Zixing & Yue, Huijuan & Tian, Ge & Feng, Shouhua, 2026. "Enhanced conversion of glucose to HMF by effectively modulating Sr2+ and oxygen vacancy content in TiO2 with Ca as sacrificial agent," Renewable Energy, Elsevier, vol. 256(PI).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pi:s0960148125023699
    DOI: 10.1016/j.renene.2025.124705
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148125023699
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.renene.2025.124705?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to

    for a different version of it.

    More about this item

    Keywords

    ;
    ;
    ;
    ;
    ;

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:renene:v:256:y:2026:i:pi:s0960148125023699. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.