Hierarchical TiO2@carbon nanofiber aerogels with enhanced visible-light photocatalytic performance for environmental remediation

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-05-21 DOI:10.1016/j.apsusc.2025.163541

Jintao Zhou , Jiaqi Zhao , Enjie Wu , Yuanjun Liu , Xupin Zhuang

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引用次数: 0

Abstract

Developing efficient visible-light-driven photocatalysts for environmental remediation remains challenging due to the limited light utilization and rapid charge recombination in traditional TiO₂-based materials. Herein, we report a facile approach to fabricate hierarchical TiO₂@carbon nanofiber aerogels (TiO₂@CNFAs) with uniformly distributed TiO₂ nanoparticles on a carbon nanofiber skeleton. The unique hierarchical structure provides extensive surface area (up to 153.7 m²/g) and intimate TiO₂/carbon interfacial contact, while the rational band structure design effectively narrows the bandgap to 2.33 eV for enhanced visible light absorption. The optimized interface engineering leads to remarkably improved charge separation efficiency, evidenced by a 16-fold increase in photocurrent density (3.63 μA/cm²) and extended carrier lifetime (4.22 ns). These advantages enable superior photocatalytic performance with over 90 % removal efficiency for three dyes (Methylene Blue, Congo Red, and Rhodamine B) and one antibiotic (Tetracycline) under xenon lamp irradiation, and achieving 93.69 % degradation of Rhodamine B under natural sunlight within 240 min. This work provides a promising strategy for designing efficient visible-light-driven photocatalysts for environmental applications.

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具有增强可见光催化性能的纳米纤维气凝胶用于环境修复

由于传统tio2基材料的光利用率有限和电荷重组速度快，开发用于环境修复的高效可见光驱动光催化剂仍然具有挑战性。在此，我们报告了一种简单的方法，在碳纳米纤维骨架上均匀分布TiO2纳米粒子，制备分层TiO2@carbon纳米纤维气凝胶（TiO2@CNFAs）。独特的分层结构提供了广泛的比表面积（高达153.7 m2/g）和密切的TiO2/碳界面接触，而合理的能带结构设计有效地将带隙缩小到2.33 eV，以增强可见光吸收。优化后的界面工程显著提高了电荷分离效率，光电流密度提高了16倍（3.63 μA/cm2），载流子寿命延长了4.22 ns。这些优点使其具有优异的光催化性能，在氙灯照射下对三种染料（亚甲蓝、刚果红和罗丹明B）和一种抗生素（四环素）的去除率超过90% %，在240 min的自然光照下对罗丹明B的降解率达到93.69 %。这项工作为设计环境应用的高效可见光驱动光催化剂提供了一种有前途的策略。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.