Article
Chemistry, Analytical
Grace W. Muna, Emily Barrera, Lucas Robinson, Hiba Majeed, Keon Jones, Abigail Damschroder, Andrew Vila
Summary: This study reports on the electroanalytical performance of a glassy carbon electrode (GCE) modified with antimony and bismuth (Sb/Bi-GCE) for detecting heavy metal ions, using lead and cadmium as model analytes. The Sb/Bi-GCE showed superior performance compared to Bi-GCE and Sb-GCE surfaces. For instance, the limit of detection for lead was 0.01 ppb using Sb/Bi-GCE, while it was 0.1 ppb on Bi-GCE and 1 ppb on Sb-GCE.
Article
Chemistry, Analytical
Qingxia Ran, Fangfang Sheng, Guorui Chang, Min Zhong, Shuxia Xu
Summary: A glassy carbon electrode modified with sulfur-doped reduced graphene oxide (S-rGO) and chitosan (CTS) was used to create an electrochemical sensor for the selective detection of trace amounts of Hg2+ in fish muscle samples. The sensor showed excellent selectivity and sensitivity, paving the way for potential applications in environmental testing.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Analytical
Shi-Hua Chen, Zong-Yin Song, Xiang-Yu Xiao, Hong-Qi Huang, Yuan-Fan Yang, Pei-Hua Li, Meng Yang, Xing-Jiu Huang
Summary: Vacancy and doping engineering were used to improve the electrocatalytic ability of nanomaterials for detecting heavy metal ions. The P-doped material showed enhanced sensitivity and selectivity towards As(III), and the vacancies provided abundant electrons to form active centers.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Megumi Kasuno, Hitomi Osuga, Katsuya Shina, Takuya Yamazaki
Summary: A flow coulometric electroanalytical system was developed to determine the Pb(II) content with high efficiency and low detection limits. Selective determination of Pb(II) was successfully achieved by adjusting the electrodeposition potential.
Article
Nanoscience & Nanotechnology
Xingye Liu, Xin Wang, Jianjie Li, Menglong Qu, Min Kang, Cheng Zhang
Summary: Electrochemical detection, especially anodic stripping voltammetry (ASV), is widely used for heavy metal ion detection due to its high sensitivity, low detection limit, and on-site real-time detection capability. However, the reliance on modified sensors in ASV detection complicates the preparation process and introduces contaminants. In this study, a preconcentration relaxation strategy was developed to improve the detection performance of bare sensors without modification, leading to a wider detection range, higher sensitivity, and lower detection limit for lead ion detection.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Eldhose V. Varghese, Bejoy Thomas, Carsten Schwandt, Praveen C. Ramamurthy, Alex Joseph
Summary: An electrochemical sensor for lead ion detection in aqueous media has been developed using a modified carbon paste electrode. The sensor showed good performance in terms of sensitivity and selectivity, with a detection limit of 7.12 x 10(-14) M (14.7 pg/L). The stability and reusability of the modified electrode were also satisfactory.
Article
Chemistry, Analytical
Artur Huseinov, Abdul Hoque, Kyle A. Ruble, Brandon J. Dee, Noe T. Alvarez
Summary: This study presents a reagentless sample preparation method for the detection of particulate Pb contaminants in tap water using membrane electrolysis. The membrane electrolysis allows for the in-situ generation of nitric acid, which, when combined with anodic stripping voltammetry, provides a powerful and reagent-free detection of Pb2+. The setup configuration enables semi-autonomous operation and requires minimal attention, making it more suitable for continuous measurements of particulate contaminants in tap water.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Enidale Yazie Muluneh, Menbere Leul Mekonnen, Siraye Esubalew Debebe
Summary: This study reported the use of Square Wave Anodic Stripping Voltammetry technique with a bismuth-modified glassy carbon electrode for the simultaneous determination of lead and cadmium content in paints. The results showed excellent percent recovery values and the Pb and Cd contents in these products have not been reported yet. The method is not significantly influenced by the paint matrix and can be used as an alternative analytical method for the determination of heavy metals in the paint matrix. The amount of Pb(II) and Cd(II) in the given paints are below the permissible levels based on the regulation of Ethiopia, indicating their safety for use in the country.
Article
Chemistry, Analytical
Reyhan Dincer, Sukriye Ulubay Karabiberoglu, Zekerya Dursun
Summary: This study proposes a dependable approach for the selective and sensitive identification of zinc, cadmium and lead in different sample matrices using an over-oxidized poly(xylenol blue) film glassy carbon electrode coated with bismuth (Bi/PXBov.ox/GCE). The best conditions for determining these elements were found to be a 0.1 mol L-1 acetate buffer solution as supporting electrolyte (pH 4.5), -1.5 V accumulation potential, and 180 s accumulation duration. Under these conditions, the detection limits of Zn(II), Cd(II) and Pb(II) were 3.20 μg L-1, 0.21 μg L-1 and 1.98 μg L-1, respectively. Moreover, this novel, cheap and easy-to-prepare Bi/PXBov.ox/GCE was successfully used for the analysis of Zn(II), Cd(II) and Pb(II) in lipstick samples, with consistent results compared to inductively coupled plasma mass spectrometry.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Physical
Najat Hamid Sibit, Mahmoud Roushani, Zahra Mirzaei Karazan
Summary: A novel sensor was developed using electropolymerization to modify a glassy carbon electrode for the fast determination of mercury ions in different samples. The sensor showed selective detection of mercury ions and displayed satisfactory recovery in various samples, with good reproducibility, repeatability, and stability.
Article
Chemistry, Analytical
Mohammad Reza Jalali Sarvestani, Tayyebeh Madrakian, Abbas Afkhami
Summary: In this study, a highly sensitive electrochemical sensor was developed for the detection of ultra-trace levels of Pb2+. The sensor was modified with an in-situ electroplated bismuth film and a nanocomposite of a recently synthesized melamine based covalent organic framework and Fe3O4 nanoparticles. The combination of Fe3O4@SNW1 and the bismuth film significantly enhanced the sensitivity of the sensor towards Pb2+. The optimized sensor showed a linear response in the concentration range of 0.003-0.3 μmol L-1 with a detection limit of 0.95 nmol L-1. The sensor demonstrated good selectivity towards Pb2+ and was successfully applied for the determination of Pb2+ in different edible specimens.
Article
Chemistry, Analytical
Gul Sirin Ustabasi, Ismail Yilmaz, Mustafa Ozcan, Ebru Cetinkaya
Summary: Pencil graphite electrode modified with MWCNT and Bi3+ showed improved sensitivity and reduced charge transfer resistance in the simultaneous analysis of Pb2+, Cd2+, and Zn2+. This modification method offers effective electroanalytical performance with low time consumption and cost.
Article
Chemistry, Multidisciplinary
Azar Yousefi, Hossein Aghaie, Masoud Giahi, Laleh Maleknia
Summary: This paper investigates the electrochemical behavior of Cd2+ and Pb2+ sensing using polyindole (PIN)/Mn2O3 nanocomposite and PIN/Mn2O3/polyaniline (PANI) nanofibers modified on a glassy carbon electrode. The study varied the amount of (PIN)/Mn2O3 nanocomposite to find the best performance. The results show that the PIN/Mn2O3/PANI nanofibers modified electrode exhibits good linear relationships for Cd2+ and Pb2+ in the concentration range of 0.05-450 mu g L-1, with detection limits of 0.05 and 0.02 mu g L-1, respectively.
Article
Biochemistry & Molecular Biology
Siyamthanda Hope Mnyipika, Tshimangadzo Saddam Munonde, Philiswa Nosizo Nomngongo
Summary: This paper describes the successful fabrication of an electrochemical sensor by electrodeposition of MnO2 nanoparticles and RGO nanosheets, which significantly improved the detection of Zn(II), Cd(II) and Cu(II) ions in surface water. The modified sensor electrode exhibited high sensitivity, reproducibility, and stability for simultaneous determination of the three metal ions. The results demonstrate the potential of MnO2@RGO nanocomposite for early detection of heavy metals in water samples with enhanced sensitivity.
Review
Electrochemistry
Rubin Gulaboski, Ivan Bogeski
Summary: This article introduces the significance of polarography and its derivative technique, pulse voltammetry, which has been developed for a century. It emphasizes the importance of pulse voltammetry as a simple and viable alternative method for mechanistic studies, analytical applications, and kinetic and thermodynamic evaluations. Furthermore, it highlights the contributions made by several women electrochemists in the theoretical and practical application of pulse voltammetric techniques.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Yanyan Yin, JingWen Wang, Bo Chen, Pengye Zhang, Ge Li, Wei Sun, Fang Xin Hu, Chang Ming Li
Summary: Bacterial infections present a significant public health threat, and treating wound infections caused by bacteria is of great importance. The traditional use of bacteriostatic agents often leads to additional pollution. In this study, a mushroom-shaped clean and green BiFeO3/g-C3N4 composite is employed for photocatalytic antibacterial activity and wound healing promotion. The ratio between BiFeO3 and g-C3N4 is delicately adjusted to control the production of OH and O-2(-) through catalyzing the decomposition of hydrogen peroxide (H2O2) under illumination. The experimental results demonstrate that 10% BFO/CN exhibits the best performance in OH and O-2(-) production, resulting in the highest antibacterial ability against E. coli and S. aureus.
Article
Chemistry, Analytical
Xin Wang, Yanjing Yun, Wei Sun, Zhisong Lu, Xiaoqi Tao
Summary: In this study, we discovered the competitive coordination effect of pyrophosphate on MOFs structure and developed a fluorescent immunoassay for detecting CAP residues. The method is simple and efficient, allowing for rapid and accurate detection of CAP residues.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Physical
Shiwei Qian, Xiaoshuai Wu, Zhuanzhuan Shi, Xiaofen Li, Xin Sun, Yongjia Ma, Wei Sun, Chunxian Guo, ChangMing Li
Summary: In this study, a hierarchically porous nanowires-material is carefully tuned for an optimal pore structure by adjusting the weight percentage of SiO2-hard template. The as-prepared nanowires are used as an anode in microbial fuel cells, showing significantly improved output power density.
Article
Chemistry, Analytical
Lijun Yan, Lifang Huang, Tingxing Hu, Yijing Ai, Bei Wang, Wei Sun
Summary: This paper investigates nitrogen-doped ultrathin graphdiyne (NUGDY) based on graphdiyne and its application as a modified electrode for the analysis of 6,7-dihydroxycoumarin. The results show that NUGDY has a promotive effect on the electrode performances and exhibits low detection limit and high sensitivity for 6,7-dihydroxycoumarin.
Article
Chemistry, Analytical
Yuxue Chen, Yunxiu Sun, Yanyan Niu, Baoli Wang, Zejun Zhang, Lina Zeng, Lin Li, Wei Sun
Summary: In this paper, a MXene and multi-walled carbon nanotube composite modified electrochemical sensor was developed for efficient analysis of plant hormone IAA. The sensor exhibited a wide detection range and low detection limit, and was successfully applied for IAA content analysis in pea seedlings.
Article
Biochemistry & Molecular Biology
Xiaoqing Li, Lisi Wang, Baoli Wang, Siyue Zhang, Meng Jiang, Wanting Fu, Wei Sun
Summary: In this study, a new electrochemical horseradish peroxidase biosensor was designed using black phosphorene and single-walled carbon nanotubes nanocomposites as modifiers. The experimental results showed that the biosensor exhibited excellent electrocatalytic activity and analytical performance, with good detection efficiency for different target substances.
Review
Polymer Science
Wenjing Xiong, Cheng Zhang, Yuanyuan Fang, Mingsheng Peng, Wei Sun
Summary: Organic/polymer light-emitting diodes (OLEDs/PLEDs) have gained attention for their applications in full-color displays and solid-state lighting. Near-infrared (NIR) emitting dyes are being investigated for their potential in electroluminescence and optical imaging. This review focuses on the progress in conjugated polymers and organic molecules for OLEDs/PLEDs, specifically the relationship between organic fluorophore structures and electroluminescence properties. Approaches to enhance the performance of NIR OLEDs/PLEDs are also briefly discussed.
Article
Chemistry, Analytical
Xiaoqing Li, Lisi Wang, Lijun Yan, Xiao Han, Zejun Zhang, Xiaoping Zhang, Wei Sun
Summary: A new portable and wireless intelligent electrochemical nanosensor was developed for the detection of 6,7-dihydroxycoumarin (6,7-DHC). Black phosphorene nanosheets were prepared and mixed with nano-diamond to form ND@BP nanocomposites. The nanocomposite was used to modify a screen-printed electrode (SPE) for improved electrochemical performance. The nanosensor showed a wide linear range and low detection limit for 6,7-DHC analysis, and was successfully applied to detect 6,7-DHC in real drug samples using the standard addition method, expanding the application of BP-based nanocomposites for electroanalysis.
Article
Chemistry, Analytical
Yijing Ai, Lisi Wang, Wanting Fu, Xiang Ye, Juan Zhou, Xiaoping Zhang, Shuhai He, Wei Sun
Summary: In this paper, a graphdiyne (GDY)-modified glassy carbon electrode was prepared and used for the sensitive and simultaneous detection of Zn2+, Cd2+ and Hg2+ heavy metal ions. The GDY-modified electrode provided a larger surface area and more active sites for the absorption of metal ions. By codeposition with Bi3+, the heavy metal ions were pre-concentrated on the GDY-modified electrode surface, resulting in high sensitivity and selectivity during stripping analysis. The detection ranges and limits for Zn2+, Cd2+ and Hg2+ were determined using differential pulse anodic stripping voltammetry.
Article
Polymer Science
Siyue Zhang, Lin Yang, Xiaoping Zhang, Yuxue Chen, Yutong Zhang, Wei Sun
Summary: The paper presents in situ NMR spectroelectrochemistry for studying redox reactions and identifying unstable reaction intermediates. The authors achieved in situ polymerization synthesis of ultrathin graphdiyne nanosheets on a copper nanoflower/copper foam-based electrode. They also deposited palladium nanoparticles on the GDY nanosheets. This new NMR-electrochemical cell showed successful application in monitoring the oxidation of hydroquinone to benzoquinone in aqueous solution.
Article
Chemistry, Analytical
Xiaoyan Yang, Rong Huang, Lulu Xiong, Feng Chen, Wei Sun, Ling Yu
Summary: A novel colorimetric aptasensor was developed to detect ochratoxin A (OTA) by utilizing charge effect-assisted silver enhancement. Gold nanoparticles (AuNPs) were used as carriers of aptamers tagged with a positively charged tetramethylrhodamine (TAMRA), which catalyzed silver reduction and deposition. The TAMRA attracted and retained the silver lactate around the AuNPs due to the attraction between positive and negative charges, increasing the chance of AuNP-catalyzed silver reduction. The charge effect-assisted silver enhancement was confirmed by tagging aptamers of different base pair lengths with TAMRA. The as-prepared OTA aptasensor exhibited a working range of 1 x 10(2)-1 x 10(6) pg mL(-1) and a detection limit of 28.18 pg mL(-1). It was successfully applied to determine OTA in actual samples with satisfactory results.
Article
Biochemistry & Molecular Biology
Xiaoqing Li, Fan Shi, Lisi Wang, Siyue Zhang, Lijun Yan, Xiaoping Zhang, Wei Sun
Summary: Black phosphorene quantum dots (BPQDs) with proven morphologies by TEM results were prepared using ultrasonic-assisted liquid-phase exfoliation and centrifugation. A novel electrochemical enzyme sensor was then developed by co-modification of BPQDs with horseradish peroxidase (HRP) on a carbon ionic liquid electrode (CILE). The presence of BPQDs accelerated the electron transfer rate between HRP and the electrode surface, resulting in well-shaped voltammetric peaks and a fast channel for direct electron transfer.
Article
Chemistry, Analytical
Juan Li, Chao Wu, Chengsong Yuan, Zhuanzhuan Shi, Kaiyue Zhang, Zhuo Zou, Lulu Xiong, Jie Chen, Yali Jiang, Wei Sun, Kanglai Tang, Hongbin Yang, Chang Ming Li
Summary: This study synthesized an iron single atomic site catalyst anchored on 2-D N-doping graphene (Fe-SASC/G) and used it as a biomimetic sensor to electrochemically detect hydrogen peroxide. The catalyst exhibited an extremely high sensitivity and the mechanism behind it was investigated. The results showed that the distance between adjacent single Fe atomic catalytic sites on 2-D graphene matched well with the outer length of bioxygen of H2O2, leading to a bridge adsorption that enabled simultaneous 2-electron transfer.
ANALYTICAL CHEMISTRY
(2022)
Article
Electrochemistry
Siyue Zhang, Hui Cheng, Baoli Wang, Fan Shi, Lijun Yan, Lina Zeng, Lin Li, Shuhai He, Wei Sun
Summary: In this study, a petal-shaped FeS@MoS2-C nanocomposite was synthesized using carbon fiber as the basic carrier by hydrothermal method. The nanocomposite was then uniformly dispersed and drip-coated with a mixture of hemoglobin (Hb) and Nafion on a newly prepared carbon ionic liquid electrode (CILE) to build a modified electrode. The Nafion/Hb/FeS@MoS2-C/OLE modified electrode exhibited excellent catalytic performance for nitrite, hydrogen peroxide, and bromate detection, with a wide detection range.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2022)
Article
Chemistry, Physical
Zhibo Tong, Wei Sun, Chongyang Li, Zhixu Tang, Yongli Huang, Chuang Yao, Lei Zhang, Chang Q. Sun
Summary: By incorporating mechanical and thermal perturbations into Raman spectroscopy, this study investigated the response of individual bonds in the C-N=2H:2O=N-C interactions of TATB assembly, revealing distinct behaviors of different bonds and showcasing the importance of molecular coupling interactions in advancing engineering in chemistry and functional molecular materials.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Electrochemistry
Wenhai Tan, Youfeng Zhang, Yichen Zhang, Yanbo Ma, Chao Zhao, Yinling Wang
Summary: This study synthesized Co3O4/CC cathode materials with excellent performance for aqueous zinc-ion batteries by varying the reactant concentration. The Co3O4/CC nanowires exhibited uniform distribution, regular surface, and small size on the carbon cloth. The battery assembled with Co3O4/CC material synthesized at a reactant concentration ratio of 2:1 showed better performance, with high discharge specific capacity and capacity retention rate.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
Article
Electrochemistry
T. Salahuddin, Iqra Kousar, Mair Khan, M. Munawwar Iqbal Ch
Summary: This paper investigates the dynamics of fluid motion powered by cilia within a curved channel and examines the chemical reactions occurring in the presence of electro-osmotic impact. The findings offer insights into various flow characteristics and present a method for simulating non-Newtonian fluid models in three dimensions. Additionally, the model has potential applications in the development of micro-vascular chips, which could be crucial for diagnosing blood-related issues.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
Review
Electrochemistry
Ahmed Abou-Shady
Summary: Soil electrokinetic (SEK) is a significant technology with various applications in fields such as soil remediation, pollutant removal, and water regulation. This review summarizes the recent advancements in SEK, focusing on electrode modifications and material additives, and suggests future research directions.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
