A high-performance type-II MIL/BiVO4 heterojunction: a robust photocatalyst for efficient Cr(vi) detoxification

IF 2.6 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

New Journal of Chemistry Pub Date : 2026-05-21 DOI:10.1039/D6NJ01338D

Lidan Yang, Xu Jia, Xiulian Wang, Zhiqi Song, Jiaqi Zhang, Liuxue Zhang, Jiaolong Qiao and Genxing Zhu

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Abstract

To address the issues of low efficiency and complex processes in traditional chromium pollution control technologies, a MIL/BiVO₄ heterojunction composite photocatalyst was constructed via hydrothermal in situ growth. This structure effectively promotes the separation of photo-generated charges, achieving complementary advantages between the two components, thereby significantly enhancing the photocatalytic reduction activity and efficiency toward Cr(VI). The MIL/BiVO₄ heterojunction achieved a reduction rate of nearly 100% towards hexavalent chromium within 15 minutes under the optimized conditions (UV irradiation, 15 mg of catalyst, 2 mM hexavalent chromium, and 0.7 mL of formic acid). After five cycles of reuse, the material retains over 95% of its catalytic activity, demonstrating excellent stability and reusability. This study provides new insights into developing highly efficient and sustainable materials for heavy-metal pollution remediation.

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高性能ii型MIL/BiVO4异质结：高效Cr（vi）解毒的强大光催化剂

针对传统铬污染控制技术效率低、工艺复杂的问题，采用水热原位生长法制备了MIL/BiVO4异质结复合光催化剂。这种结构有效地促进了光生电荷的分离，实现了两组分的优势互补，从而显著提高了对Cr（VI）的光催化还原活性和效率。MIL/BiVO4异质结在优化的条件下（UV照射、15 mg催化剂、2 mM六价铬和0.7 mL甲酸），在15分钟内对六价铬的还原率接近100%。经过5次循环使用后，材料保持了95%以上的催化活性，表现出优异的稳定性和可重复使用性。该研究为开发高效、可持续的重金属污染修复材料提供了新的思路。

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