Bi vacancy-induced Bi2O2S nanosheets for remarkably boosting piezocatalytic degradation of dyes and antibiotic

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-04-19 DOI:10.1016/j.materresbull.2025.113483

Jing Wang , Jing Xie , Zhenjiang Lu, Suixin Yin, Aize Hao, Jindou Hu, Yali Cao

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Abstract

Defect engineering is an efficient strategy to address piezoelectric-catalyzed degradation, but metal cation defects introduced in crystals have rarely been reported, owing to the formation of cationic defects requiring higher energy than that of anionic defects. Herein, Bi vacancy-induced Bi₂O₂S (BOS) nanosheets were synthesized for the piezoelectric-catalyzed degradation of organic dyes and antibiotic, utilizing a low-temperature solid-state reduction method with the help of NaBH₄ for the first time. Astonishingly, Bi₂O₂S (BOS-4) with a large number of Bi vacancies exhibited an impressive 95.69 % degradation rate for rhodamine B (RhB) under ultrasound, approximately three times higher than that achieved by BOS. Additionally, BOS-4 also effectively degrades other dyes as well. This phenomenon is mainly ascribed to reduced band gap and facilitated the generation of charges by the introduced Bi vacancies, which can attract negative charges move in a definite direction and promote effective charge separation, thereby improving piezocatalytic efficiency.

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铋空位诱导的Bi2O2S纳米片可显著促进染料和抗生素的压催化降解

缺陷工程是解决压电催化降解的有效策略，但由于阳离子缺陷的形成需要比阴离子缺陷更高的能量，因此晶体中引入的金属阳离子缺陷很少被报道。本文首次利用NaBH4低温固相还原法制备了铋空位诱导的Bi2O2S （BOS）纳米片，用于压电催化降解有机染料和抗生素。令人惊讶的是，具有大量Bi空位的Bi2O2S （BOS-4）在超声下对罗丹明B （RhB）的降解率高达95.69%，约为BOS的3倍。此外，BOS-4还能有效降解其他染料。这种现象主要是由于带隙减小，引入的Bi空位有利于电荷的产生，吸引负电荷向一定方向移动，促进电荷的有效分离，从而提高了压催化效率。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.