Z-type heterojunction degradation of tetracycline by 2D g-C3N4 with 3D oxygen vacancy Bi2WO6

IF 2.9 3区化学 Q3 CHEMISTRY, PHYSICAL

Physical Chemistry Chemical Physics Pub Date : 2024-12-19 DOI:10.1039/d4cp02969k

Xiao Kang, Xiangyan Li, Abulikemu Abulizi, Mihiriguli Abulimiti, Nuerla Ailijiang, Anwar Mamat

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引用次数: 0

Abstract

Photocatalytic degradation is a promising strategy for environmental remediation. Graphitic carbon nitride (g-C3N4) is the most extensively reported metal-free, Hierarchical flower-shaped Bi2WO6 particles were obtained using a simple hydrothermal method, with petals of flower-like Bi2WO6 with oxygen vacancies (Bi2WO6 OVs) with controlled content successfully decorated on g-C3N4 nanosheets. A novel Z-scheme 2D/3D heterojunction photocatalyst, g-C3N4/Bi2WO6 OVs, was successfully prepared, with its composition and structure studied using a series of material characterization techniques. Compared to single g-C3N4 and Bi2WO6 OVs, the g-C3N4/Bi2WO6 OVs exhibited improved photocatalytic activity for the degradation of tetracycline, with a degradation rate of more than 90%. Moreover, electron paramagnetic resonance spectroscopy, X-ray photoelectron spectroscopy, and Mott–Schottky measurements suggest that a Z-scheme heterojunction formed between the g-C3N4 nanosheets and Bi2WO6 OVs floral forms and that the photoinduced electrons in Bi2WO6 OVs bind to holes in g-C3N4, thus enhancing the extraction and utilization of carriers under photoexcitation. Hence, this study presents an effective method for constructing 2D/3D heterojunctions for solar fuel conversion and photocatalytic water treatment.

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二维 g-C3N4 与三维氧空位 Bi2WO6 的 Z 型异质结降解四环素

光催化降解是一种前景广阔的环境修复策略。利用简单的水热法获得了分层花状 Bi2WO6 颗粒，并成功地在 g-C3N4 纳米片上装饰了花瓣状的含氧空位（Bi2WO6 OVs）。成功制备了新型 Z 型二维/三维异质结光催化剂 g-C3N4/Bi2WO6 OVs，并利用一系列材料表征技术研究了其组成和结构。与单一的 g-C3N4 和 Bi2WO6 OV 相比，g-C3N4/Bi2WO6 OV 在降解四环素方面表现出更高的光催化活性，降解率超过 90%。此外，电子顺磁共振波谱、X射线光电子能谱和Mott-Schottky测量结果表明，g-C3N4纳米片和Bi2WO6 OVs之间形成了Z型异质结，Bi2WO6 OVs中的光诱导电子与g-C3N4中的空穴结合，从而提高了载流子在光激发下的提取和利用。因此，本研究提出了一种构建二维/三维异质结的有效方法，可用于太阳能燃料转换和光催化水处理。

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来源期刊

Physical Chemistry Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

5.50

自引率

9.10%

发文量

2675

审稿时长

2.0 months

期刊介绍： Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.