Self-driven lattice strain and defective engineering of ultrathin BiOI facilitates the realization of significantly light-triggered degradation and sterilization capability

IF 8.1 1区 工程技术 Q1 ENGINEERING, CHEMICAL
Sihan Ma , Shuaihao Ma , Jianglong Kong , Xinglin Yu , Wentao Li , Deng Long , Xingyong Li , Binglin Chen , Xue Bai , Guang Ran
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Abstract

The emerging pollutants and harmful bacteria remain a critical environmental concern, the efficient removal of pollutants and bacteria achieved by potential strategies is an important guarantee for the long-term development of human society. Herein, the ultrathin BiOI with endogenous stress and defects is designed to carry out the contaminant degradation and bacterial killing. Internal strain can effectively regulate the electronic structures to induce the formation of abundant reactive oxide species. Meanwhile, the abundant defect sites promote the separation and migration of carriers and activate photothermal conversion triggered by non-radiative relaxation to further accelerate the thermal motion of surrounding molecules, inducing the formation of a solid–liquid-gas three-phase interface to increase the photogenerated carrier reaction activity, and enhance the light absorption capacity by decreasing the bandgap, ultimately boosting photocatalytic capability. The experimental results show that when the strain and defect exist, the degradation efficiency of dye is increased by nearly 1.5 times, and the antibacterial efficiency is close to 99% even under low power light conditions. The rational design of strain-driven nanosystem enlighteningly provides a methodological support for the development of high-performance decontamination and disinfection catalysts in complex sewage system.

Abstract Image

Abstract Image

超薄 BiOI 的自驱动晶格应变和缺陷工程有助于实现显著的光触发降解和灭菌能力
新出现的污染物和有害细菌仍然是一个重要的环境问题,通过潜在的策略实现污染物和细菌的有效去除是人类社会长期发展的重要保证。在此,设计了具有内源胁迫和缺陷的超薄BiOI来进行污染物降解和细菌杀灭。内部应变能有效调节电子结构,诱导生成丰富的活性氧化物。同时,丰富的缺陷位点促进载流子的分离和迁移,激活非辐射松弛引发的光热转化,进一步加速周围分子的热运动,诱导形成固液气三相界面,提高光生载流子反应活性,并通过减小带隙增强光吸收能力,最终提高光催化能力。实验结果表明,当存在应变和缺陷时,染料的降解效率提高了近1.5倍,即使在低功率光条件下,抗菌效率也接近99%。菌株驱动纳米系统的合理设计为复杂污水系统中高性能去污消毒催化剂的开发提供了具有启发性的方法支持。
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来源期刊
Separation and Purification Technology
Separation and Purification Technology 工程技术-工程:化工
CiteScore
14.00
自引率
12.80%
发文量
2347
审稿时长
43 days
期刊介绍: Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.
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