Chemosensors最新文献_第4页

Preparation, Characterization and Electrochemical Response of Nanostructured TiAlV with Potentiostatically Deposited IrOx as a pH Sensor for Rapid Detection of Inflammation 纳米结构 TiAlV 的制备、表征和电化学响应与蓄势沉积氧化亚铁作为快速检测炎症的 pH 传感器

Chemosensors Pub Date : 2024-06-11 DOI: 10.3390/chemosensors12060109

J. Jírů, V. Hybášek, A. Michalcová, Klára Korbelová, Lukáš Koláčný, J. Fojt

引用次数: 0

Upcycled Graphene Oxide Nanosheets for Reversible Room Temperature NO2 Gas Sensor 用于可逆室温二氧化氮气体传感器的上循环氧化石墨烯纳米片

Chemosensors Pub Date : 2024-06-10 DOI: 10.3390/chemosensors12060108

Vien Trinh, Kai Xu, Hao Yu, Nam Ha, Yihong Hu, Muhammad Waqas Khan, Rui Ou, Yange Luan, Jiaru Zhang, Qijie Ma, Guanghui Ren, Jianzhen Ou

{"title":"Upcycled Graphene Oxide Nanosheets for Reversible Room Temperature NO2 Gas Sensor","authors":"Vien Trinh, Kai Xu, Hao Yu, Nam Ha, Yihong Hu, Muhammad Waqas Khan, Rui Ou, Yange Luan, Jiaru Zhang, Qijie Ma, Guanghui Ren, Jianzhen Ou","doi":"10.3390/chemosensors12060108","DOIUrl":"https://doi.org/10.3390/chemosensors12060108","url":null,"abstract":"Graphene oxide (GO) nanosheets, as one of the most studied graphene derivatives, have demonstrated an intrinsically strong physisorption-based gas–matter behavior, owing to its enhanced volume–surface ratio and abundant surface functional groups. The exploration of efficient and cost-effective synthesis methods for GO is an ongoing task. In this work, we explored a novel approach to upcycle inexpensive polyethylene terephthalate (PET) plastic waste into high-quality GO using a combination of chemical and thermal treatments based on a montmorillonite template. The obtained material had a nanosheet morphology with a lateral dimension of around ~2 µm and a thickness of ~3 nm. In addition, the GO nanosheets were found to be a p-type semiconductor with a bandgap of 2.41 eV and was subsequently realized as a gas sensor. As a result, the GO sensor exhibited a fully reversible sensing response towards ultra-low-concentration NO2 gas with a limit of detection of ~1.43 ppb, without the implementation of an external excitation stimulus including elevating the operating temperature or bias voltages. When given a thorough test, the sensor maintained an impressive long-term stability and repeatability with little performance degradation after 5 days of experiments. The response factor was estimated to be ~11% when exposed to 1026 ppb NO2, which is at least one order of magnitude higher than that of other commonly seen gas species including CH4, H2, and CO2.","PeriodicalId":502217,"journal":{"name":"Chemosensors","volume":" 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141365754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SnO2 Nanowire/MoS2 Nanosheet Composite Gas Sensor in Self-Heating Mode for Selective and ppb-Level Detection of NO2 Gas 采用自加热模式的二氧化锡纳米线/MoS2 纳米片复合气体传感器用于ppb 级二氧化氮气体的选择性检测

Chemosensors Pub Date : 2024-06-09 DOI: 10.3390/chemosensors12060107

Jin-Young Kim, Ali Mirzaei, Jae-Hun Kim

{"title":"SnO2 Nanowire/MoS2 Nanosheet Composite Gas Sensor in Self-Heating Mode for Selective and ppb-Level Detection of NO2 Gas","authors":"Jin-Young Kim, Ali Mirzaei, Jae-Hun Kim","doi":"10.3390/chemosensors12060107","DOIUrl":"https://doi.org/10.3390/chemosensors12060107","url":null,"abstract":"The development of low-cost and low-power gas sensors for reliable NO2 gas detection is important due to the highly toxic nature of NO2 gas. Herein, initially, SnO2 nanowires (NWs) were synthesized through a simple vapor–liquid–solid growth mechanism. Subsequently, different amounts of SnO2 NWs were composited with MoS2 nanosheets (NSs) to fabricate SnO2 NWs/MoS2 NS nanocomposite gas sensors for NO2 gas sensing. The operation of the sensors in self-heating mode at 1–3.5 V showed that the sensor with 20 wt.% SnO2 (SM-20 nanocomposite) had the highest response of 13 to 1000 ppb NO2 under 3.2 V applied voltage. Furthermore, the SM-20 nanocomposite gas sensor exhibited high selectivity and excellent long-term stability. The enhanced NO2 gas response was ascribed to the formation of n-n heterojunctions between SnO2 NWs and MoS2, high surface area, and the presence of some voids in the SM-20 composite gas sensor due to having different morphologies of SnO2 NWs and MoS2 NSs. It is believed that the present strategy combining MoS2 and SnO2 with different morphologies and different sensing properties is a good approach to realize high-performance NO2 gas sensors with merits such as simple synthesis and fabrication procedures, low cost, and low power consumption, which are currently in demand in the gas sensor market.","PeriodicalId":502217,"journal":{"name":"Chemosensors","volume":" 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141367482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative Analysis of Chlorogenic Acid during Coffee Roasting via Raman Spectroscopy 通过拉曼光谱定量分析咖啡烘焙过程中的绿原酸

Chemosensors Pub Date : 2024-06-09 DOI: 10.3390/chemosensors12060106

de H Herdt, Tobias Teumer, S. Keck, Thomas Kunz, V. Schiwek, Sarah Kühnemuth, F. Methner, Matthias Rädle

{"title":"Quantitative Analysis of Chlorogenic Acid during Coffee Roasting via Raman Spectroscopy","authors":"de H Herdt, Tobias Teumer, S. Keck, Thomas Kunz, V. Schiwek, Sarah Kühnemuth, F. Methner, Matthias Rädle","doi":"10.3390/chemosensors12060106","DOIUrl":"https://doi.org/10.3390/chemosensors12060106","url":null,"abstract":"Tracking coffee roasting at an industrial scale for quality control is challenging. Bean color is a practical gauge for monitoring and regulating the process but only occurs before and after the process. This study highlights the feasibility of monitoring the process throughout using Raman spectroscopy. Strecker degradation and the Maillard reaction contribute to various aromatic compounds that can serve as markers in quality monitoring. Among these are chlorogenic acids (CGAs), recognized as pivotal factors determining the desired aroma. Here, drum and fluidized bed roaster processes were monitored, capitalizing on the chemical alterations induced by high temperatures (140–200 °C), particularly through the Maillard reaction. These chemical changes manifest in the scattered light signal. For real-time monitoring, Raman spectra were taken every 10 ms in selected ranges, with an average calculated every second. Utilizing a calibration matrix from a High-Pressure Liquid Chromatography (HPLC) method, CGA concentration becomes the control variable for assessing roasting progress. This study reveals the potential of Raman spectroscopy for tracking CGA during roasting. It establishes a correlation between inelastic scattered light and CGA validated through laboratory measurements and fixed roasting conditions, resulting in a theoretical CGA concentration that can be used as a process termination criterion.","PeriodicalId":502217,"journal":{"name":"Chemosensors","volume":" 87","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141367394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quick Plant Sample Preparation Methods Using a Micro-Homogenizer for the Detection of Multiple Citrus Pathogens 使用微型均质机快速制备植物样品的方法，用于检测多种柑橘病原体

Chemosensors Pub Date : 2024-06-08 DOI: 10.3390/chemosensors12060105

Chia-Wei Liu, S. Bodaghi, G. Vidalakis, Hideaki Tsutsui

引用次数: 0

Bimetallic Fe3O4@Co3O4/CN as a Nanozyme with Dual Enzyme-Mimic Activities for the Colorimetric Determination of Mercury(II) 双金属 Fe3O4@Co3O4/CN 作为一种具有双重酶模拟活性的纳米酶用于比色法测定汞(II)

Chemosensors Pub Date : 2024-06-07 DOI: 10.3390/chemosensors12060104

Yanyan Xing, Pingping He, Deyong Wang, Yuan Liang, Xing Gao, Xiaohong Hou

{"title":"Bimetallic Fe3O4@Co3O4/CN as a Nanozyme with Dual Enzyme-Mimic Activities for the Colorimetric Determination of Mercury(II)","authors":"Yanyan Xing, Pingping He, Deyong Wang, Yuan Liang, Xing Gao, Xiaohong Hou","doi":"10.3390/chemosensors12060104","DOIUrl":"https://doi.org/10.3390/chemosensors12060104","url":null,"abstract":"Colorimetric biosensor-based nanozymes have received considerable attention in various fields thanks to the advantages of the simple preparation, good stability, and regulable catalytic activity of nanozymes. In this study, a bimetallic nanozyme Fe3O4@Co3O4/CN was prepared via the high-temperature calcination of Fe3O4-PVP@ZIF-67. The material retained its skeletal structure before calcination, which prevented the aggregation of nanoparticles and exposed more active sites of the nanozyme, substantially enhancing the intrinsic dual enzyme-mimetic activities, including peroxidase- and oxidase-like activities. In particular, Fe3O4@Co3O4/CN with oxidase-like activity catalyzed the colorless tetramethylbenzidine (TMB) to become blue oxTMB with oxygen. Reducing glutathione (GSH) could inhibit the above oxidation reaction. In contrast, with respect to the existence of mercury(II), GSH bound to mercury(II) due to the strong affinity between mercury(II) and -SH, thus eliminating the inhibition and restoring the oxTMB signal. A simple and effective colorimetric sensor was fabricated to detect mercury(II) based on the above principles. The proposed measurement had a linear range of 0.1–15 μM and a limit of detection (LOD) of 0.017 μM. It was shown that the established colorimetric sensing system could be successfully applied to detect mercury(II) in water samples, and the Fe3O4@Co3O4/CN nanozyme proved to be a promising candidate for biosensing application.","PeriodicalId":502217,"journal":{"name":"Chemosensors","volume":" 27","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141371715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Bismuth Film Assembly on Flexible Carbon Cloth for the Electrochemical Detection of Heavy Metal Ions 在柔性碳布上合成用于重金属离子电化学检测的铋膜组件

Chemosensors Pub Date : 2024-06-06 DOI: 10.3390/chemosensors12060103

Yujie Cao, Xiangyu Zhou, Ziling Wang, Yi Li, Minglei Yan, Yun Zeng, Jie Xiao, Yang Zhao, Jun-Heng Fu

{"title":"Synthesis of Bismuth Film Assembly on Flexible Carbon Cloth for the Electrochemical Detection of Heavy Metal Ions","authors":"Yujie Cao, Xiangyu Zhou, Ziling Wang, Yi Li, Minglei Yan, Yun Zeng, Jie Xiao, Yang Zhao, Jun-Heng Fu","doi":"10.3390/chemosensors12060103","DOIUrl":"https://doi.org/10.3390/chemosensors12060103","url":null,"abstract":"The utilization of bismuth as a sensing material for the detection of heavy metal ions has gained significant attention due to its exceptional interfacial activity and selective absorption properties. However, it also poses challenges in terms of agglomeration and its inferior electrical conductivity during the synthesis process. This paper employed a facile in situ synthesis and electrodeposition approach to uniformly grow a bismuth film on a conductive carbon cloth, designated as Bi/Ag@CC. The Bi/Ag@CC electrode material exhibited benign electrochemical properties, enabling its application for detecting Pb2+ in tap water and lake water samples. Furthermore, this work investigated the impact of electrochemical parameters, including electrolyte pH, deposition potential and pre-enrichment time, on the detection performance. The results demonstrated the sensor’s wide linear range (from 20 to 400 ppb) and detection limits (0.15 ppb) for heavy metal ion detection, along with excellent anti-interference capabilities and satisfactory repeatability, with an RSD of less than 2.31% (n = 6). This paper offers a novel strategy for positioning the bismuth-based composite as a promising candidate for practical electrochemical sensing applications.","PeriodicalId":502217,"journal":{"name":"Chemosensors","volume":"14 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141380132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interaction of the Polymeric Layer Derived from 3-(4-Trifluoromethyl)-phenyl)-thiophene with Synthetic Stimulants on the Phase Boundary 3-(4-三氟甲基苯基)噻吩聚合物层与合成刺激剂在相界上的相互作用

Chemosensors Pub Date : 2024-06-05 DOI: 10.3390/chemosensors12060099

T. V. Shishkanova, Natálie Štěpánková, G. Broncová, Martin Vrňata

{"title":"Interaction of the Polymeric Layer Derived from 3-(4-Trifluoromethyl)-phenyl)-thiophene with Synthetic Stimulants on the Phase Boundary","authors":"T. V. Shishkanova, Natálie Štěpánková, G. Broncová, Martin Vrňata","doi":"10.3390/chemosensors12060099","DOIUrl":"https://doi.org/10.3390/chemosensors12060099","url":null,"abstract":"Modification of an electrode surface with a selective layer leads to amplification of the electrochemical signal. A film derived from electrochemically oxidized 3-(4-trifluoromethyl)-phenyl)-thiophene deposited on a graphite electrode (ThPhCF3/G) was used to estimate the affinity for synthetic stimulants (2-aminoindane, buphedrone, naphyrone) using a combination of square wave voltammetry and electrochemical impedance spectroscopy. The modified surface was characterized using Raman spectroscopy, which confirmed that the presence of the –PhCF3 group is important for the recognition of synthetic stimulants. The determined values of the adsorption constants (Kads) showed the significance of charge–transfer and/or hydrogen bond interactions between—PhCF3 groups in the polymeric film and the analyte of interest: buphedrone (9.79 × 105) < naphyrone (1.57 × 106) < 2-AI (1.87 × 106). Compared to electrodes modified with nanomaterial, PThPhCF3/G-electrodes showed the highest sensitivity in concentration range of 1–11 μmol L−1 at neutral pH and a possibility of detection of 0.43–0.56 μg mL−1 (sr = 0.05–0.12). The analytical performance of ThPhCF3/G promises good perspectives for the detection of synthetic stimulants in forensic samples without prior pretreatment.","PeriodicalId":502217,"journal":{"name":"Chemosensors","volume":"59 29","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141383660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Portable Sensing Platform for the Visual Detection of Iodide Ions in Food and Clinical Samples 用于目视检测食品和临床样本中碘离子的便携式传感平台

Chemosensors Pub Date : 2024-06-05 DOI: 10.3390/chemosensors12060102

Aizaz Khan, Ali Turab Jafry, H. Ajab, Asim Yaqub, Shahaab Jilani, Dildar Hussain, Naseem Abbas

{"title":"Portable Sensing Platform for the Visual Detection of Iodide Ions in Food and Clinical Samples","authors":"Aizaz Khan, Ali Turab Jafry, H. Ajab, Asim Yaqub, Shahaab Jilani, Dildar Hussain, Naseem Abbas","doi":"10.3390/chemosensors12060102","DOIUrl":"https://doi.org/10.3390/chemosensors12060102","url":null,"abstract":"The detection of iodide ions (I−), despite challenges due to low concentrations and potential masking, is crucial for studying physiological processes and diagnosing diseases. A colorimetric sensor was developed to improve I− ion monitoring and facilitate on-site detection based on filter paper, which is a cost-effective platform. The sensor observed color changes in response to the exposure of hydrogen peroxide (H2O2), 3,3′,5,5′-tetramethylbenzidine (TMB), from colorless to yellowish brown. The sensor demonstrated a detection limit of 0.125 × 10−6 M for I− ions in a relatively wide range of 0.01 to 15 × 10−6 M under optimized conditions including gel concentration, temperature, incubation time, TMB and H2O2 concentration, and pH. Furthermore, the proposed sensor was successfully employed in a variety of applications, such as biological (urine and blood serum), food (egg yolk and snacks), and environmental samples (tap water). The study established effective recoveries in complex media for visual on-site I− ion monitoring, indicating the developed assay as a potent, affordable, and practical platform.","PeriodicalId":502217,"journal":{"name":"Chemosensors","volume":"34 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141384975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal Modulation of Resistance Gas Sensor Facilitates Recognition of Fragrance Odors 电阻式气体传感器的热调节功能有助于识别香水气味

Chemosensors Pub Date : 2024-06-05 DOI: 10.3390/chemosensors12060101

Ran Sui, Erpan Zhang, Xiaoshui Tang, Wenjun Yan, Yun Liu, Houpan Zhou

引用次数: 0