Photodynamic antibacterial activity of CoTiO3/ZnIn2S4 Z-type heterojunction and its efficient enhancement mechanism by reactive oxygen species

IF 5.1 2区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS Ceramics International Pub Date : 2024-10-04 DOI:10.1016/j.ceramint.2024.10.005
Meiru Lv , Yanan Song , Huan Li , Kangfu Wang , Xiaoning Tang , Qian Sun , Lin Tian
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Abstract

The Solar-powered photocatalytic antibacterial technology has received widespread attention as a safe and efficient environmental self-cleaning technology, but its application remains a challenging task. Taking inspiration from the design of heterojunction structures in photocatalytic materials, this study employed a precipitation in-situ synthesis method to successfully construct a CoTiO3/ZnIn2S4 (CTZIS) Z-scheme heterojunction with excellent photocatalytic performance by depositing layered ZnIn2S4 nanosheets in situ on a rod-shaped CoTiO3 support. After visible-light irradiation for 20 min, the CTZIS antimicrobial agent (100 μg/mL) exhibited an ultra-high bacterial inactivation rate of 99.9 %, which was 10 and 11 times higher than that of ZnIn2S4 and CoTiO3 under the same conditions, using E. coli as the study object. Meanwhile, bacteria treated with CTZIS exhibited the highest degree of cell membrane lipid peroxidation and the lowest activity of intracellular respiratory chain dehydrogenase, demonstrating excellent antibacterial performance. After testing and calculation, it was found that the excellent antibacterial activity comes from the solid gap electric field between heterojunctions, which enhances the effective spatial separation of photo-generated carriers and effectively increases the quantum yield of reactive oxygen species (ROS). The synergistic antibacterial mechanism of CTZIS from bacterial surface to bacterial interior co-damage was revealed, in which the production of • O2 and •OH are a key active substance in the process of bacterial oxidative stress inactivation.
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CoTiO3/ZnIn2S4 Z 型异质结的光动力抗菌活性及其受活性氧影响的高效增强机制
太阳能光催化抗菌技术作为一种安全高效的环境自清洁技术受到广泛关注,但其应用仍是一项具有挑战性的任务。受到光催化材料异质结结构设计的启发,本研究采用沉淀原位合成法,通过在棒状 CoTiO3 载体上原位沉积层状 ZnIn2S4 纳米片,成功构建了具有优异光催化性能的 CoTiO3/ZnIn2S4 (CTZIS) Z 型异质结。以大肠杆菌为研究对象,在可见光照射 20 分钟后,CTZIS 抗菌剂(100 μg/mL)的细菌灭活率高达 99.9%,是相同条件下 ZnIn2S4 和 CoTiO3 的 10 倍和 11 倍。同时,用 CTZIS 处理的细菌细胞膜脂质过氧化程度最高,细胞内呼吸链脱氢酶活性最低,表现出优异的抗菌性能。经过测试和计算发现,优异的抗菌活性源于异质结之间的固态间隙电场,它增强了光生载流子的有效空间分离,有效提高了活性氧(ROS)的量子产率。研究揭示了 CTZIS 从细菌表面到细菌内部协同损伤的协同抗菌机制,其中 - O2- 和 -OH 的产生是细菌氧化应激失活过程中的关键活性物质。
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来源期刊
Ceramics International
Ceramics International 工程技术-材料科学:硅酸盐
CiteScore
9.40
自引率
15.40%
发文量
4558
审稿时长
25 days
期刊介绍: Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.
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