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<p>LaFeO₃-modified biochar hybrids (LFOB) exhibit outstanding adsorption performance. However, the presence of biochar induces severe light-shielding and light attenuation effects, which significantly restrict their photocatalytic activity and necessitate further structural optimization. Taking advantage of the superior light-harvesting capability of carbon quantum dots (CQDs), we rationally designed and synthesized a novel CQDs surface-anchored LFOB composite (denoted as C@LFOB). The morphology, physicochemical properties, photocatalytic performance and reaction kinetics of C@LFOB were systematically investigated. Characterization results confirmed the successful anchoring of CQDs on the LFOB surface. C@LFOB exhibits a significantly higher final removal rate and kinetic activity, achieving a 21.89% increase in MB removal within 10&#xa0;min compared with LFOB. Mechanism investigations revealed that its superior removal performance originates from the synergistic effect between the inherent adsorption capacity of LFOB and CQDs-enhanced photocatalysis. This work provides a novel and facile strategy to unleash the photocatalytic potential of LFOB, offering a promising approach for the development of high-performance biochar-based photocatalysts for environmental remediation.</p>

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Unleashing synergistic photocatalysis in LaFeO3-biochar hybrids: carbon quantum dots surface anchoring and mechanistic insights

  • 期刊论文

  • 发表日期：

    2026年5月25日

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  • Lihua Zhang,
  • Bei Yang,
  • Zhuo Ren,
  • Chuang Wu,
  • Qing Li,
  • Xijun Ma,
  • Jingjing Duan,
  • Shiying He,
  • Lihong Xue

摘要

LaFeO₃-modified biochar hybrids (LFOB) exhibit outstanding adsorption performance. However, the presence of biochar induces severe light-shielding and light attenuation effects, which significantly restrict their photocatalytic activity and necessitate further structural optimization. Taking advantage of the superior light-harvesting capability of carbon quantum dots (CQDs), we rationally designed and synthesized a novel CQDs surface-anchored LFOB composite (denoted as C@LFOB). The morphology, physicochemical properties, photocatalytic performance and reaction kinetics of C@LFOB were systematically investigated. Characterization results confirmed the successful anchoring of CQDs on the LFOB surface. C@LFOB exhibits a significantly higher final removal rate and kinetic activity, achieving a 21.89% increase in MB removal within 10 min compared with LFOB. Mechanism investigations revealed that its superior removal performance originates from the synergistic effect between the inherent adsorption capacity of LFOB and CQDs-enhanced photocatalysis. This work provides a novel and facile strategy to unleash the photocatalytic potential of LFOB, offering a promising approach for the development of high-performance biochar-based photocatalysts for environmental remediation.