Efficient photocatalytic tetracycline elimination over Z-scheme g-C3N4/Bi5O7I heterojunction under sunshine light: Performance, mechanism, DFT calculation and pathway

Tan, Dongyu; Huang, Fei; Guo, Shenjia; Li, Danqin; Yao, Yan; Zhang, Wu

doi:10.1016/j.jallcom.2023.169468

Cited by 31 publications

(1 citation statement)

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“…To address this, recent studies have optimized the photocatalytic performance of Bi 5 O 7 I, such as through the enhancement of the spatial separation efficiency of photogenerated electron–hole pairs through the construction of binary heterostructures with an internal electric field at the interface between different photocatalysts as reported by Huang et al [ 14 ]. Tan et al [ 15 ] studied the preparation of heterojunction composites with Bi 5 O 7 I by identifying suitable photocatalysts as the second component as an effective method to improve its photocatalytic activity. Additionally, employing NH 2 -UIO-66 as a co-catalyst to prepare Bi 5 O 7 I/UIO-66-NH 2 heterojunction composites has enhanced the photocatalytic activity for ciprofloxacin (CIP) degradation [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Innovative Bi5O7I/MIL-101(Cr) Compounds: A Leap Forward in Photocatalytic Tetracycline Removal

Hong,

Chu,

et al. 2024

IJMS

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In environmental chemistry, photocatalysts for eliminating organic contaminants in water have gained significant interest. Our study introduces a unique heterostructure combining MIL-101(Cr) and bismuth oxyiodide (Bi5O7I). We evaluated this nanostructure’s efficiency in adsorbing and degrading tetracycline (TC) under visible light. The Bi5O7I@MIL-101(Cr) composite, with a surface area of 637 m2/g, prevents self-aggregation seen in its components, enhancing visible light absorption. Its photocatalytic efficiency surpassed Bi5O7I and MIL-101(Cr) by 33.4 and 9.2 times, respectively. Comprehensive analyses, including scanning electron microscopy (SEM) and transmission electron microscopy (TEM), confirmed the successful formation of the heterostructure with defined morphological characteristics. BET analysis demonstrated its high surface area, while X-ray diffraction (XRD) confirmed its crystallinity. Electron spin resonance (ESR) tests showed significant generation of reactive oxygen species (ROS) like h+ and·•O2− under light, crucial for TC degradation. The material maintained exceptional durability over five cycles. Density functional theory (DFT) simulations and empirical investigations revealed a type I heterojunction between Bi5O7I and MIL-101(Cr), facilitating efficient electron–hole pair separation. This study underscores the superior photocatalytic activity and stability of Bi5O7I@MIL-101(Cr), offering insights into designing innovative photocatalysts for water purification.

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Section: Introductionmentioning

confidence: 99%