超薄金属有机框架与碳量子点协同改善光电化学水氧化和盐酸四环素降解性能

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2024-11-17 DOI:10.1016/j.seppur.2024.130589

Ruyi Wang, Xingzhi Li, Yuxin Kan, Wenjun Fang, Caiyun Chen, Yongyan Chen, Lingling Wang, Yong Jia

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引用次数: 0

摘要

寻找可同时缓解能源和环境问题的清洁双功能材料是当前的研究热点。我们的研究构建了TiO2/CQDs/NH2-MIL-125光阳极系统，以探索金属有机框架（MOFs）材料在水分离和生物医学废水处理中的应用。最佳 TiO2/CQDs/NH2-MIL-125 光阳极的光电流密度在 1.23 V 对 RHE 时达到 1.7 mA/cm2，约为原始 TiO2 的 1.8 倍。更重要的是，优化后的光阳极在 60 分钟内对盐酸四环素的去除率高达 74%。通过机理研究，NH2-MIL-125 的窄带隙拓宽了光的吸收范围，使其能够吸收可见光。此外，CQDs 的特殊电子传导行为和 TiO2/NH2-MIL-125 之间的Ⅱ型异质结抑制了光生电子-空穴重组。这项工作探索了光电化学（PEC）材料在环境催化清洁生产中的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Ultrathin metal–organic framework synergizes with carbon quantum dots improving photoelectrochemical water oxidation and tetracycline hydrochloride degradation performance

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Ultrathin metal–organic framework synergizes with carbon quantum dots improving photoelectrochemical water oxidation and tetracycline hydrochloride degradation performance

Finding clean dual functional materials which can simultaneously alleviate energy and environmental issues is currently a research hotspot. In our work, TiO₂/CQDs/NH₂-MIL-125 photoanode system was constructed to explore the application of metal–organic frameworks (MOFs) materials in water splitting and biomedical wastewater treatment. The photocurrent density of the optimal TiO₂/CQDs/NH₂-MIL-125 photoanode reaches 1.7 mA/cm² at 1.23 V vs. RHE, which is about 1.8 times that of pristine TiO₂. More importantly, optimized photoanode displays an excellent remove ratio toward tetracycline hydrochloride of 74 % within 60 min. Through mechanism exploration, the excellent performance is attributed to the narrow band gap of NH₂-MIL-125 widens the light absorption range to the visible region. Additionally, the specific electron conduction behavior of CQDs and the type Ⅱ heterojunction between TiO₂/NH₂-MIL-125 inhibited the photogenerated electron-hole recombination. This work explores the application of photoelectrochemical (PEC) materials in environmental catalytic clean production.

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.