Understanding the Integrated Adsorption and Photocatalytic Processes of Tetracycline over TiO2@UiO-66-NH2 Heterojunctions

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Industrial & Engineering Chemistry Research Pub Date : 2025-03-24 DOI:10.1021/acs.iecr.5c00184

Ying Yang, Long Chen, Miao Li, Xiaoqing Qiu

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Abstract

Semiconductor photocatalysis holds great potential for removing organic contaminants in wastewater, where pollutant adsorption onto photocatalysts is crucial for effective degradation. Herein, tetracycline (TC) was selected as a model pollutant to explore the integrated adsorption and photocatalytic processes of TiO₂@UiO-66-NH₂ (TUON). Structural characterizations confirm the successful formation of the TUON heterojunction, with uniform nanoparticles and a homogeneous elemental dispersion. BET analysis shows a surface area of 429.1 m² g^–1, and the micromesoporous structure (pore size: 1–3 nm) facilitates TC adsorption (saturated adsorption capacity of 131.6 mg g^–1 at 298.15 K). Adsorption follows the quasi-second-order model and the Langmuir isotherm. The absorption process is spontaneous, exothermic, and entropy-increasing. Under UV irradiation, TUON achieves almost complete TC removal within 60 min, with a rate constant of 0.04742 min^–1, outperforming pure TiO₂ (0.02004 min^–1) and UiO-66-NH₂ (0.00739 min^–1). This study brings light to comprehend the pollutant adsorption and photodegradation mechanisms, promoting efficient photocatalysts for environmental applications.

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了解四环素在TiO2@UiO-66-NH2异质结上的综合吸附和光催化过程

半导体光催化在去除废水中的有机污染物方面具有巨大的潜力，而污染物在光催化剂上的吸附是有效降解废水的关键。本文选择四环素（TC）作为模型污染物，探索TiO2@UiO-66-NH2 （TUON）的综合吸附和光催化过程。结构表征证实了TUON异质结的成功形成，具有均匀的纳米颗粒和均匀的元素弥散。BET分析表明，其比表面积为429.1 m2 g-1，微介孔结构（孔径为1 ~ 3 nm）有利于吸附TC (298.15 K下饱和吸附量为131.6 mg g-1)，吸附符合准二级模型和Langmuir等温线。吸收过程是自发的、放热的、熵递增的。在UV照射下，TUON在60 min内几乎完全去除TC，速率常数为0.04742 min - 1，优于纯TiO2 （0.02004 min - 1）和UiO-66-NH2 （0.00739 min - 1）。该研究有助于理解污染物的吸附和光降解机理，促进高效光催化剂在环境中的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Industrial & Engineering Chemistry Research 工程技术-工程：化工

CiteScore

7.40

自引率

7.10%

发文量

1467

审稿时长

2.8 months

期刊介绍： ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.