Lead-Free Cs2AgBiBr6/TiO2 S-Scheme Heterojunction for Efficient Photocatalytic Antibiotic Rifampicin Degradation

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-09-27 DOI:10.1021/acs.nanolett.4c03648

Yin Jiang, Zhaoyang Wang, Wen Yang, Peizhi Yang, Xiaobo Feng, Peng Qin, Fuqiang Huang

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Abstract

Exploring efficient and stable halide perovskite-based photocatalysts is a great challenge due to the balance between the photocatalytic performance, toxicity, and intrinsic chemical instability of the materials. Here, the environmentally friendly lead-free perovskite Cs₂AgBiBr₆ confined in the mesoporous TiO₂ crystal matrix has been designed to enhance the charge carrier extraction and utilization for efficient photocatalytic rifampicin degradation. The as-prepared Cs₂AgBiBr₆/TiO₂ catalyst was stable in air for over 500 days. An S-scheme heterojunction was formed between the (004) plane of Cs₂AgBiBr₆ and the (101) plane of TiO₂ through the Bi–O–Br bonds. The built-in electric field at the interface efficiently promoted the photoinduced charge separation and carrier extraction. The Cs₂AgBiBr₆/TiO₂-200 showed a 92.83% degradation efficiency of rifampicin within 80 min under simulated sunlight illumination (AM 1.5G 100 mW cm^–2). This work offers an effective way for the construction of halide perovskite-based photocatalysts with high photocatalytic performance, good stability, and low toxicity simultaneously.

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用于高效光催化抗生素利福平降解的无铅 Cs2AgBiBr6/TiO2 S-Scheme 异质结

由于光催化性能、毒性和材料内在化学不稳定性之间的平衡问题，探索高效稳定的卤化物类包晶石光催化剂是一项巨大的挑战。在此，我们设计了封闭在介孔二氧化钛晶体基体中的环保型无铅过氧化物 Cs2AgBiBr6，以提高电荷载流子的萃取和利用，从而实现利福平的高效光催化降解。制备的 Cs2AgBiBr6/TiO2 催化剂在空气中的稳定性超过 500 天。Cs2AgBiBr6 的（004）面与 TiO2 的（101）面之间通过 Bi-O-Br 键形成了 S 型异质结。界面上的内置电场有效地促进了光诱导的电荷分离和载流子萃取。在模拟太阳光（AM 1.5G 100 mW cm-2）照射下，Cs2AgBiBr6/TiO2-200 在 80 分钟内对利福平的降解效率达到 92.83%。这项工作为构建同时具有高光催化性能、良好稳定性和低毒性的卤化物过氧化物基光催化剂提供了一条有效途径。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.