Surfaces and Interfaces最新文献

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Preparation of CeO2QDs-g-C3N4/C composites and electrochemical determination of aflatoxin B1 CeO2QDs-g-C3N4/C 复合材料的制备及黄曲霉毒素 B1 的电化学测定
IF 5.7 2区 材料科学
Surfaces and Interfaces Pub Date : 2024-09-19 DOI: 10.1016/j.surfin.2024.105138
{"title":"Preparation of CeO2QDs-g-C3N4/C composites and electrochemical determination of aflatoxin B1","authors":"","doi":"10.1016/j.surfin.2024.105138","DOIUrl":"10.1016/j.surfin.2024.105138","url":null,"abstract":"<div><div>The presence of Aflatoxin B1 (AFB1) in food represents a significant threat to human health, leading to the development of cancer. The key factor for effective trace detection technology lies in the utilization of sensor materials that exhibit excellent selectivity and high sensitivity properties. In this study, a successfully synthesis of g-C<sub>3</sub>N<sub>4</sub>/C with a high specific surface area uses melamine and houttuynia cordata stem as starting materials. A CeO<sub>2</sub>QDs-g-C<sub>3</sub>N<sub>4</sub>/C composite was prepared by hydrothermally anchoring cerium oxide quantum dots (CeO<sub>2</sub>QDs) onto the surface of g-C<sub>3</sub>N<sub>4</sub>/C, the high redox efficiency of CeO<sub>2</sub>QDs and the small size limitation effect significantly improve the sensing performance. The composite was characterized by XRD, XPS, SEM, TEM, and N<sub>2</sub> adsorption-desorption. The results revealed that, the CeO<sub>2</sub>QDs-g-C<sub>3</sub>N<sub>4</sub>/C composite sensor material exhibited significant advantages with a large specific surface area, a well-defined micropore structure, and abundant reactive sites. In addition, electrochemical activity tests are conducted using EIS, CV, and DPV for the purpose of electrochemical investigations. The CeO<sub>2</sub>QDs-g-C<sub>3</sub>N<sub>4</sub>/C/GCE exhibits exceptional electrocatalytic activity against AFB1, with a wide linear response range of 100–1300 pg ml<sup>-1</sup>, an impressively low detection limit (LOD) of 6.61 fg ml<sup>-1</sup> (S/<em>N</em> = 3), and a sensitivity of 0.985 pg μM ml<sup>-1</sup>μA<sup>-1</sup>. Furthermore, the stability, repeatability, and interference experimental response errors all remain below 5 %. It is also noteworthy that, the sensor material demonstrates excellent practicality in AFB1 assays conducted on real samples, which serves to illustrate its immense potential for applications in food safety evaluation.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Regulation of extracellular electron transfer by sustained existence of Fe²⁺/Fe³⁺ redox couples on iron oxide-functionalized woody biochar anode surfaces in bioelectrochemical systems 生物电化学系统中氧化铁功能化木质生物炭阳极表面持续存在的 Fe²⁺/Fe³⁺ 氧化还原偶,可调节细胞外电子转移
IF 5.7 2区 材料科学
Surfaces and Interfaces Pub Date : 2024-09-19 DOI: 10.1016/j.surfin.2024.105114
{"title":"Regulation of extracellular electron transfer by sustained existence of Fe²⁺/Fe³⁺ redox couples on iron oxide-functionalized woody biochar anode surfaces in bioelectrochemical systems","authors":"","doi":"10.1016/j.surfin.2024.105114","DOIUrl":"10.1016/j.surfin.2024.105114","url":null,"abstract":"<div><div>Sluggish extracellular electron transfer between the exoelectrogens and anode interface limits the application of bioelectrochemical systems (BECs) for energy generation. In this study, an innovative anode coated with oxidized biochar and co-functionalized with iron nanoparticles (FBC/Fe<sub>2</sub>O<sub>3</sub>) was developed to enhance microbial reactions through tuned physicochemical and electrical properties. The designed anode features a highly porous, heterogeneous structure with a large accessible surface area of 10.141 m²/g, promoting better habitation and metabolism of exoelectrogens. The synergistic effect of iron nanoparticles and oxidized functional groups increased the hydrophilicity of the anode surface, augmenting its affinity for bacterial outer membrane c-cysts and facilitating microbial adhesion at a density of 3.106 × 10⁹ CFU/cm². The iron moieties on the FBC/Fe<sub>2</sub>O<sub>3</sub> electrode surface act as electron mediators, utilizing Fe²⁺/Fe³⁺ redox couples, as evidenced by X-ray photoelectron spectroscopy (XPS) data. This enhancement improved extracellular electron transfer (EET) between bacterial cells and the anode surface, resulting in a faster and bifurcated EET process through both direct transfer via outer membrane c-cysts and mediated transfer via the redox couples of Fe moieties. The assembled double-chamber microbial fuel cell (DC-MFC) with the FBC/Fe<sub>2</sub>O<sub>3</sub> anode achieved a maximum power density of 528.75 mW/m² and a chemical oxygen demand (COD) removal efficiency of 47.5 % within 24 h of operation.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Surface and electrochemical characteristics of S-scheme nanoheterostructured photocatalysts of AgIO3/Cu2SnS3 with enhanced solar energy driven photocatalytic activity 具有增强的太阳能驱动光催化活性的 AgIO3/Cu2SnS3 S 型纳米异构光催化剂的表面和电化学特性
IF 5.7 2区 材料科学
Surfaces and Interfaces Pub Date : 2024-09-19 DOI: 10.1016/j.surfin.2024.105140
{"title":"Surface and electrochemical characteristics of S-scheme nanoheterostructured photocatalysts of AgIO3/Cu2SnS3 with enhanced solar energy driven photocatalytic activity","authors":"","doi":"10.1016/j.surfin.2024.105140","DOIUrl":"10.1016/j.surfin.2024.105140","url":null,"abstract":"<div><div>Wastewater treatment is regarded as one of the most challenges to overcome worldwide water threats. As a result, great efforts were devoted to find alterative solutions to maximize the usage of wastewater in industries or agriculture which consumes 70 % of water resources. Interestingly, the utilization of solar energy as a renewable, green and costless energy source is the ideal sustainable solution for wastewater treatment. In this context, Chalcogenides based nanoheterostructures such as AgIO<sub>3</sub>/Cu<sub>2</sub>SnS<sub>3</sub> were prepared via simple, cost-effective and large-scale methods then utilized as visible light active photocatalysts for wastewater treatment. Scanning electron microscopy (SEM), X-ray powder diffraction (XRD), N<sub>2</sub> sorpometry (BET), X-ray photoelectron spectroscopy (XPS), ultraviolet visible light spectrophotometry (UV–vis), and Isoelectric point (pH<sub>iep</sub>) were utilized to investigate the characteristics of nanoheterostructures. The produced nanoheterostructures were evaluated as photocatalysts for amoxicillin photodegradation using solar energy. The AgIO<sub>3</sub>/Cu<sub>2</sub>SnS<sub>3</sub> (25ACS) demonstrated a superior photodegradation efficiency (93.5 %) after 60 min. Mot-Schottky plots and trapping experiments were carried out to have an extensive insight of the photodegradation mechanism.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of micrometer bubble interfaces on the detection and measurement method of XLPE 微米气泡界面对 XLPE 检测和测量方法的影响
IF 5.7 2区 材料科学
Surfaces and Interfaces Pub Date : 2024-09-19 DOI: 10.1016/j.surfin.2024.105089
{"title":"Effect of micrometer bubble interfaces on the detection and measurement method of XLPE","authors":"","doi":"10.1016/j.surfin.2024.105089","DOIUrl":"10.1016/j.surfin.2024.105089","url":null,"abstract":"<div><div>Hidden air bubble defects in the XLPE (Cross-Linked Polyethylene) insulation will seriously affect its electrical performance, which needs to be detected timely to ensure the safe and stable operation of the power system, but the interfaces between bubbles and XLPE may affect the detection. This paper proposes a novel method for high-precision detection and measurement method of micron-sized bubbles in XLPE based on THz time-domain reflection technology. To analyze the influencing factors limiting the high-precision detection and measurement of micron-sized defects, firstly, the propagation law of THz wave in XLPE with and without defects is studied, and the unipolar and bipolar pulses reflected at the defects are analyzed by overlap, and then a new method of micron-sized defects detection and measurement is proposed based on the overlap property of the bipolar pulses, and the relationship between the minimum detecting frequency and the size of the defects in the various detecting methods is determined. And the finite element method is used to simulate the THz detection of XLPE samples with defect thicknesses of 100, 7, 5, and 3 μm, respectively, and the proposed method is validated in conjunction with experiments. The results show that micrometer defects can be detected and measured with high precision using this proposed method, and the error can be controlled within 4.39%, which is significantly better than the conventional detection method. The proposed method can provide a new idea for non-destructive testing of insulation defects.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of high-quality and water-resistant PBG through H-PDMS modification: From experiments to molecular dynamics simulation 通过 H-PDMS 改性技术开发高品质防水 PBG:从实验到分子动力学模拟
IF 5.7 2区 材料科学
Surfaces and Interfaces Pub Date : 2024-09-19 DOI: 10.1016/j.surfin.2024.105141
{"title":"Development of high-quality and water-resistant PBG through H-PDMS modification: From experiments to molecular dynamics simulation","authors":"","doi":"10.1016/j.surfin.2024.105141","DOIUrl":"10.1016/j.surfin.2024.105141","url":null,"abstract":"<div><p>The effective treatment and high-value application of phosphogypsum (PG) are of critical importance for the sustainable development of this construction material. However, its poor water-resistance property has limited its application in the construction field. In order to expand the application potential of phosphorous-building gypsum (PBG) as a durable material, potassium hydroxide (KOH) and hydroxyl‑terminated polydimethylsiloxane (H-PDMS) were used as the activating agent, and the water-resistant modifying agent in this study, respectively, to develop a high-quality and water-resistant PBG product. In addition, molecular dynamics was used to reveal the modification mechanism of H-PDMS and the water-resistance mechanism of KOH activating PBG. The study results show that H-PDMS can significantly improve the water-resistance performance of PBG test blocks. KOH can increase the surface activity of PBG by introducing -OH radicals, promote the reaction between H-PDMS and PBG, and form a dense hydrophobic layer on PBG, thus effectively improving its water-resistance performance. The number of surface active -OH radicals in PBG, the clustering effect of H-PDMS, and impurities in PBG can all result in different experimental and simulation outcomes. Meanwhile, the electrostatic force is an important factor influencing the adsorption of water droplets on the surface of PBG, and the reaction of H-PDMS with PBG normally occurs between Si-O and S-O. This study has systematically interpreted the working mechanism of water-resistant PBG, presenting an important significance in the utilization of PG resources.</p></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-performance flexible humidity sensor based on B-TiO2/ SnS2 nanoflowers for non-contact sensing and respiration detection 基于 B-TiO2/ SnS2 纳米流的高性能柔性湿度传感器,用于非接触传感和呼吸检测
IF 5.7 2区 材料科学
Surfaces and Interfaces Pub Date : 2024-09-19 DOI: 10.1016/j.surfin.2024.105136
{"title":"High-performance flexible humidity sensor based on B-TiO2/ SnS2 nanoflowers for non-contact sensing and respiration detection","authors":"","doi":"10.1016/j.surfin.2024.105136","DOIUrl":"10.1016/j.surfin.2024.105136","url":null,"abstract":"<div><p>The development of flexible humidity sensors is essential for the advancement of wearable devices and electronic skin. However, the process of preparing these sensors is typically complex, and they often suffer from poor stability and a limited sensing range, which fails to meet the requirements for practical applications. Here, we prepared SnS<sub>2</sub> with nanoflower morphology by hydrothermal method, and successfully prepared a high-performance flexible humidity sensor with a high response range (20-95 %) by compositing it with B-TiO<sub>2</sub> nanoparticles with oxygen defects after sodium borohydride reduction and coating it on a PET flexible substrate. This sensor demonstrates an exceptional response (753.2 at 90 % RH) in high humidity environments and exhibits rapid response (13 s) and recovery times (19 s). Moreover, the sensor accurately detects human breathing patterns and frequencies, making it suitable for non-contact sensing applications. This research offers valuable insights into the simplified preparation and advancement of flexible humidity sensors.</p></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nanoripples evolution on tungsten surface induced by two-pulse configuration 双脉冲配置诱导钨表面纳米波纹演变
IF 5.7 2区 材料科学
Surfaces and Interfaces Pub Date : 2024-09-19 DOI: 10.1016/j.surfin.2024.105139
{"title":"Nanoripples evolution on tungsten surface induced by two-pulse configuration","authors":"","doi":"10.1016/j.surfin.2024.105139","DOIUrl":"10.1016/j.surfin.2024.105139","url":null,"abstract":"<div><div>Tuneable shapes and uniformity of the laser-induced periodic surface structures (LIPSS) attract interest because of their diverse applications in both scientific research and technological advancements. In this work, we investigate the progression of regular one-dimensional (1D) LIPSS on a tungsten surface, examining its evolution based on the time delay between two laser pulses that initiate the formation of nanoripples. 1D-LIPSS were formed in the case of single-beam laser ablation with approximately 84 laser pulses. Two-dimensional (2D) LIPSS, including triangle, hexagonal, and square shapes, were generated by employing two cross-polarized laser beams (with wavelengths of 1030 nm and pulse durations of 40 fs) with no delay between the pulses. However, introducing a time delay of 2 picoseconds (ps) between the two cross-polarized laser pulses resulted in the division of the initially cross-oriented 2D-LIPSS into square-shaped structures, particularly along the spatially overlapped region of the laser beams. The emergence of triangle- and hexagonal-shaped two-dimensional laser-induced periodic surface structures (2D-LIPSS) is analyzed within the framework of a self-organization model, particularly in the context of solidifying the molten layer under cold temperature conditions on the tungsten surface. We examine the formation mechanism of LIPSS, attributing it to a combination of the self-organization/hydrodynamic mechanism initially, which transitions to the electromagnetic mechanism as the effective number of pulses increases.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fabrication of a macro-micro porous structure on PEEK surface by ultrasound-assisted sulfonation 通过超声波辅助磺化在聚醚醚酮(PEEK)表面制造宏微多孔结构
IF 5.7 2区 材料科学
Surfaces and Interfaces Pub Date : 2024-09-18 DOI: 10.1016/j.surfin.2024.105131
{"title":"Fabrication of a macro-micro porous structure on PEEK surface by ultrasound-assisted sulfonation","authors":"","doi":"10.1016/j.surfin.2024.105131","DOIUrl":"10.1016/j.surfin.2024.105131","url":null,"abstract":"<div><p>A multiscale porous surface can significantly improve the osseointegration of biomedical implants, but it cannot be facilely achieved on the Poly-ether-ether-ketone (PEEK) surface. In this work, a macro-micro porous structure was prepared on the PEEK surface by ultrasound-assisted sulfonation. The surface morphologies, chemical compositions, functional groups, surface roughness, and wettability of the porous structures at different sulfonation times were characterized by scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectrometer (FTIR), laser scanning confocal microscope (LSCM), and contact angle measurement, respectively. The results demonstrate that a macro-micro porous structure is formed on the PEEK surface, with macropore sizes ranging from 50 to 250 μm and micro-sized pore sizes ranging from 0.2 to 1.5 μm. Moreover, the results of in <em>vitro</em> cellular experiments demonstrate that the macro-micro porous structure can promote cell adhesion and proliferation of BMCSc. The formation mechanism of the multiscale porous structures has also been discussed. This novel approach may provide a simple and effective strategy for surface modification of PEEK to improve its mechanical and biological response.</p></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rapid surface modification of PEEK by ambient temperature sulfonation for high shelf-life biomedical applications 通过常温磺化对 PEEK 进行快速表面改性,实现高保质期生物医学应用
IF 5.7 2区 材料科学
Surfaces and Interfaces Pub Date : 2024-09-18 DOI: 10.1016/j.surfin.2024.105117
{"title":"Rapid surface modification of PEEK by ambient temperature sulfonation for high shelf-life biomedical applications","authors":"","doi":"10.1016/j.surfin.2024.105117","DOIUrl":"10.1016/j.surfin.2024.105117","url":null,"abstract":"<div><div>The aim of this study is to develop a rapid, simple, and economical surface treatment process for Poly (ether-ether-ketone) (PEEK) using concentrated sulfuric acid. PEEK is a biocompatible material, with a bonelike elastic modulus and is mechanically superior to other implant materials like titanium, stainless steel etc. This property brings PEEK to limelight as a promising alternative for bone implants. However, a strong challenge is observed of osseointegration mainly due to its inert surface behavior and poor hydrophilicity. Chemical surface modification is considered as one of the best ways to bioactivate the PEEK surface. In this work, two different sulfonation treatment methodologies have been designed and the effect of reaction time is systematically studied over its changing surface properties and favorable cellular growth. In one treatment, only rapid sulfonation is implemented while in other treatment processes, scaffolds are treated with NaOH solution to terminate the sulfonation process. The modified PEEK surface is next evaluated using Fourier transform infra-red spectroscopy (FTIR), contact angle, optical profilometer and scanning electron microscopy to ascertain its behavior. The modified surface is observed to possess higher hydrophilicity, higher surface roughness and high porosity. No significant difference in hydrophilicity is observed for over a month once treated, showing permanency in modification. A 90 second treatment is observed to have the highest hydrophilicity and thus selected for cellular integration studies. No sign of cell toxicity was observed in the modified surfaces, which also showed improved protein adsorption, cell viability, cell adhesion, and proliferation compared to untreated PEEK.</div><div>The proposed chemical modifications are promising techniques for a rapid, easy, and economical bioactivation of PEEK polymer for improved cellular activity.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The exploitation of local electric field generated by oxygen vacancies on BiOIO3 nano-antibacterial agents for enhanced photocatalytic sterilisation 利用 BiOIO3 纳米抗菌剂上的氧空位产生的局部电场增强光催化杀菌能力
IF 5.7 2区 材料科学
Surfaces and Interfaces Pub Date : 2024-09-18 DOI: 10.1016/j.surfin.2024.105134
{"title":"The exploitation of local electric field generated by oxygen vacancies on BiOIO3 nano-antibacterial agents for enhanced photocatalytic sterilisation","authors":"","doi":"10.1016/j.surfin.2024.105134","DOIUrl":"10.1016/j.surfin.2024.105134","url":null,"abstract":"<div><div>Methicillin-resistant <em>Staphylococcus aureus</em> (MRSA) is a typical Gram-positive foodborne pathogen, and its infection has been reported since its discovery. Photocatalysis has emerged as a safe and efficient new sterilization method in clinical and food sectors. In this study, we developed an oxygen vacancy-rich BiOIO<sub>3</sub> nano-antibacterial agent using a hydrothermal method, which was successfully synthesized and confirmed through various characterization techniques. Notably, the BiOIO<sub>3</sub> nano-antibacterial agent exhibits almost complete inactivation of 10<sup>7</sup> CFU/mL MRSA within 2 h under visible light irradiation. Furthermore, with increasing exposure duration to irradiation, gradual shrinkage and disintegration of the MRSA cell membrane were observed along with inhibition of the intracellular enzyme activity. Haemolysis tests were performed to prove the biological safety of the agent. Mechanistic investigations revealed that surface oxygen vacancies of BiOIO<sub>3</sub> facilitated adsorption binding of water and oxygen within a local electric field promoting reactive oxygen species (ROS) generation. This leads to the rapid accumulation of ROS, which attacks the cell membrane causing significant damage, disrupting normal physiological metabolism of the bacteria, and ultimately killing MRSA. The present study is expected to provide a favourable solution for developing novel efficient and green nano-antibacterial agents through surface modifications.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142311378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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