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<p>Core–shell Bi<sub>4</sub>NbO<sub>8</sub>Cl@C plate-like heterostrutured photocatalysts were successfully prepared by one-step hydrothermal process, during which glucose solution exhibited reducibility and created amounts of oxygen vacancies for Bi<sub>4</sub>NbO<sub>8</sub>Cl, while a carbon layer was in situ deposited on Bi<sub>4</sub>NbO<sub>8</sub>Cl by glucose decomposition. The structure of Bi<sub>4</sub>NbO<sub>8</sub>Cl was stabilized and armored by the thickness-tailored C layer, which provides a superior performance in the removal of acidic Cr(VI)-contained contaminant water, and the optimal Bi<sub>4</sub>NbO<sub>8</sub>Cl@C achieved 373 folds than pristine Bi<sub>4</sub>NbO<sub>8</sub>Cl in photocatalytic Cr(VI) removal. Experimental results and density functional theory (DFT) calculations show that C layer is tightly coated on the surface of BNC. Furthermore, C–O covalent bonds, which act as electron transfer channels, are formed at the interface of BNC and C layer. This study provides an important reference for the synthesis of core–shell structured photocatalysts and the efficient removal of Cr(VI) from industry wastewater.</p> Graphical Abstract <p></p>

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Interfacial defective engineering boosted charge transfer over armored Bi4NbO8Cl@C plate-like heterostructures for photocatalytic acidic Cr(VI) removal

  • 期刊论文

  • 发表日期：

    2026年3月5日

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  • Zeng Liu,
  • Fang Wu,
  • Liwei Zheng,
  • Xu Sun,
  • Chenghui Xia,
  • Hongbing Song,
  • Shuai Zhang,
  • Xiaofei Qu,
  • Liang Shi

摘要

Core–shell Bi4NbO8Cl@C plate-like heterostrutured photocatalysts were successfully prepared by one-step hydrothermal process, during which glucose solution exhibited reducibility and created amounts of oxygen vacancies for Bi4NbO8Cl, while a carbon layer was in situ deposited on Bi4NbO8Cl by glucose decomposition. The structure of Bi4NbO8Cl was stabilized and armored by the thickness-tailored C layer, which provides a superior performance in the removal of acidic Cr(VI)-contained contaminant water, and the optimal Bi4NbO8Cl@C achieved 373 folds than pristine Bi4NbO8Cl in photocatalytic Cr(VI) removal. Experimental results and density functional theory (DFT) calculations show that C layer is tightly coated on the surface of BNC. Furthermore, C–O covalent bonds, which act as electron transfer channels, are formed at the interface of BNC and C layer. This study provides an important reference for the synthesis of core–shell structured photocatalysts and the efficient removal of Cr(VI) from industry wastewater.

Graphical Abstract