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
Biochemistry & Molecular Biology
Sarani Sen, Priyabrata Sarkar
Summary: A new design of biosensor based on polymeric nano(bio)composite has been proposed for the selective detection of xanthine. The biosensor showed enhanced enzymatic activity and improved sensitivity and selectivity. The performance of the biosensor was validated using various characterization techniques and comparison with HPLC data.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(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
Wen-Juan Wang, Xin-Yang Lu, Fen-Ying Kong, Heng-Ye Li, Zhong-Xia Wang, Wei Wang
Summary: In this study, rGO/Au-Bi nanocomposites were successfully synthesized and used for simultaneous electrochemical determination of Pb2+ and Cd2+. The results showed that under optimized conditions, the proposed electrode exhibited good linearity and low detection limits for Pb2+ and Cd2+. The electrode also demonstrated excellent resistance to interference, high stability, and good repeatability.
MICROCHEMICAL JOURNAL
(2022)
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, Analytical
Ning Liu, Guo Zhao, Gang Liu
Summary: This study introduces a new method to detect Cd(II) and Pb(II) using feature stripping currents, which shows better anti-interference capability and detection accuracy. Models established using SVR and the partial least square algorithms demonstrate superior detection performance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
E. A. Shalaby, A. M. Beltagi, A. A. Hathoot, M. Abdel Azzem
Summary: The contamination of natural water by mercury and bismuth metal ions and their toxic effects have been extensively studied. A validated square-wave anodic stripping voltammetry method was developed for the individual and simultaneous determination of Bi3+ and Hg2+ ions. The newly constructed electrochemical sensor showed good selectivity and sensitivity for the detection of Bi3+ and Hg2+ in various real water samples.
Article
Chemistry, Analytical
Antonella de las M. Biasi, Eduardo A. Takara, Maria L. Scala-Benuzzi, Agustina M. Valverde, Nidia N. Gomez, German A. Messina
Summary: Currently, there is a demand for fast and sensitive methods to monitor metals in water due to their increasing presence in the environment. This study evaluated different polymeric nanocomposites for the simultaneous electrochemical determination of Cu, Cd, and Zn in water samples. Screen-printed carbon electrodes were modified with nanocomposites containing graphene, graphite oxide, and polymers like polyethyleneimide, gelatin, and chitosan. The modified electrodes showed excellent performance for detecting metal ions in water samples using square-wave anodic stripping voltammetry.
ANALYTICA CHIMICA ACTA
(2023)
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, 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.
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, Analytical
Maryam Naseri, Mohsen Mohammadniaei, Koustuv Ghosh, Subrata Sarkar, Ravi Sankar, Subhankar Mukherjee, Souvik Pal, Ehsan Ansari Dezfouli, Arnab Halder, Jixin Qiao, Nabarun Bhattacharyya, Yi Sun
Summary: Heavy metals in drinking water pose a severe threat to human health. A simple and sensitive electrochemical sensor based on a butterfly-shaped silver nanostructure was developed for the concurrent determination of cadmium, lead, copper, and mercury. The sensor exhibited excellent stability and sensitivity, with detection limits ranging from 0.4 to 7.3 ppb, making it a promising method for on-site water analysis.
Article
Chemistry, Analytical
Ali Nourbakhsh, Mostafa Rahimnejad, Maryam Asghary, Habibollah Younesi
Summary: This study developed a sensitive platform based on silver nanoparticles/graphene nanoplates modified graphite electrode for the simultaneous and selective determination of heavy metal ions in tap water. The experimental results showed that the electrochemical sensor exhibited high practical applicability, reproducibility, and stability in detecting heavy metal ions.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Analytical
Yifei Zhang, Danlei Li, Richard G. Compton
Summary: We have developed a new and sensitive stripping voltammetric method for the detection of As(III) in aqueous solution using gold macroelectrode or gold nanoparticle-modified glassy carbon electrode (GCE). The method is based on underpotential deposition (UPD) of As ad-atoms and provides linear responses within the range of 0.01 μM to 0.1 μM or 0.005 μM to 0.1 μM for gold macroelectrodes and gold nanoparticle-modified electrodes, respectively. The method shows practical value with clear and discernable signals even at low concentrations of As(III), meeting the WHO limit for drinking water.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
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
Chemistry, Inorganic & Nuclear
Li Li, Li-Min Lu, Shi-Quan Wu, De-Yuan Hu, Tian-Yu Tang, Yan-Lin Tang
Summary: In this study, the geometric properties and infrared spectra of BHT molecule were calculated using density functional theory, and the first 30 excited states were calculated using time-dependent density functional theory. The theoretical and experimental spectra of BHT molecule were found to be in good agreement, with a slight red-shift in the experimental spectrum due to the gas composition in the air. The UV spectrum was mainly formed by transitions from the ground state to excited states, and the excitation types involved local excitation and charge transfer excitation.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Analytical
Jiamin Zou, Jin Zou, Wei Zhong, Qian Liu, Xigen Huang, Yansha Gao, Limin Lu, Shuwu Liu
Summary: In this work, a novel PEDOT@NiCo-LDH/CC electrode material with excellent rate capability and cycle stability was proposed. The unique hollow nanocage structure effectively restrained the agglomeration of LDH nanosheets, and the introduction of PEDOT significantly improved the conductivity and protected the hollow LDH nanocages during cycling process. Moreover, a hybrid ASC device assembled by PEDOT@NiCo-LDH/CC//activated carbon exhibited a high energy density and power density.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Qin Zeng, Suiping Wang, Yong Qian, Minghui Yang, Limin Lu
Summary: A sandwiched photoelectrochemical (PEC) sensor was developed for sensitive detection of human epidermal growth factor receptor 2 (HER2) using BiVO4-Bi2S3 heterojunction as the photoelectric material, magnetic nanoparticles for HER2 enrichment, and CdS for signal amplification. The formation of BiVO4-Bi2S3 heterojunction facilitated the transit of electron-hole pairs. Antibody-modified magnetic nanoparticles were used to capture and separate HER2, and under illumination, the photocurrent increased with HER2 concentration. The PEC immunosensor exhibited a linear concentration range of 1.00-1.00 x 10(3) pg center dot mL(-1) and a low limit of detection of 0.680 pg center dot mL(-1) (S/N = 3) for HER2 at a bias voltage of 0.1 V (vs. Ag/AgCl electrode). The sensor was successfully applied to detect HER2 in serum samples with recoveries between 96.1% and 114% and RSDs between 1.3% and 5.9%.
Article
Engineering, Civil
Meng Liu, Guanglin Yuan, Qianjin Shu, Yuwei Zhang, Limin Lu
Summary: This study conducted quasi-static tests and finite element simulations on seven RC shear walls to investigate the seismic behaviors of RC shear walls with multiple post-openings before and after being strengthened by bonding steel plates. The results showed that the failure modes of the shear walls with post-openings were shear failure and flexural shear failure, and the seismic bearing capacities and ductility coefficients of the strengthened RC walls were significantly improved by bonding steel plates.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Meng Liu, Guanglin Yuan, Wen Sun, Qianjin Shu, Zhiyuan Zhao, Limin Lu
Summary: This study conducted pseudo-static tests on one RC squat shear wall without opening and three other RC squat shear walls with different arrangements of a single post-opening reinforced by bonding steel plates, aiming to investigate the effect of post-opening location on the seismic performance of reinforced squat shear walls. The tested specimens and three models of the RC shear walls without reinforcement were analyzed using Abaqus software. The results showed that the shear wall without opening and the reinforced shear walls with a single post-opening exhibited flexural shear failure. The difference in bearing capacity between the three reinforced specimens and the reference specimen was not more than 6%. The average displacement ductility coefficients of reinforced shear walls with central and bottom openings decreased by 9.62%, while that of reinforced shear walls with the top opening increased by 23.01%. FEA further revealed that the steel plate significantly reduced the uneven distribution of the reinforcement strain around the opening for shear walls with different post-opening locations.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2023)
Article
Chemistry, Analytical
Min Shi, Shu-Ya Xue, Guan-Wei Peng, Jing-Kun Xu, Yan-Sha Gao, Shu-Wu Liu, Xue-Min Duan, Li-Min Lu
Summary: Graphdiyne (GDY) has been widely applied in electrochemical sensing due to its large conjugation system, porous structure, and high structure defects. In this study, conductive MWCNTs were added to enhance the sensing effect of GDY. By using polydopamine (PDA) as a connecting bridge, a stable composite material GDY@PDA/MWCNTs-NH2 was formed and used as an electrochemical sensor for benomyl (Ben) detection. The sensor exhibited a wide linear range, low detection limit, high stability, repeatability, reproducibility, and selectivity, making it suitable for detecting Ben in apple and cucumber samples.
Article
Chemistry, Analytical
Jing Yang, Changxi Deng, Wei Zhong, Guanwei Peng, Jin Zou, Yan Lu, Yansha Gao, Mingfang Li, Songbai Zhang, Limin Lu
Summary: A heterostructured TiO2@MXene material rich in oxygen vacancies defects was developed as an electrochemical sensing platform for the determination of imidacloprid (IMI). TiO2 nanoparticles were grown on MXene to prevent stacking of MXene nanosheets, resulting in an excellent layered structure and large specific surface area. Electrochemical activation was applied to increase the concentration of surface oxygen vacancies, enhancing the conductivity and adsorption capacity of the composite. The VO-TiO2@MXene sensor exhibited high electrocatalytic activity for IMI reduction.
Article
Chemistry, Physical
Qian Liu, Wen-Yong Deng, Lie-Yuan Zhang, Chang-Xiang Liu, Wei-Wei Jie, Rui-Xuan Su, Bin Zhou, Li-Min Lu, Shu-Wu Liu, Xi-Gen Huang
Summary: Bamboo charcoal was impregnated with NaOH and magnetized, leading to increased surface area and improved adsorption and catalytic degradation of methylene blue.
Article
Engineering, Civil
Gongchan Li, Meng Liu, Zheren Pan, Limin Lu, Guanglin Yuan
Summary: Quasi-static tests were conducted on RC shear walls with different sizes of post-openings, and the strengthening effects of steel plates on various aspects of shear wall performance were analyzed. Results showed that pasting steel plates around the openings effectively restrained cracks and improved the shear wall integrity. The bearing capacity of the strengthened shear walls significantly increased, with a greater increase observed for larger opening sizes. The failure mode of shear walls changed from wall limb shear failure to limb hinge failure with increasing opening sizes, while the strengthened specimens failed through extremities compressive failure. Ductility increased with the opening rate until reaching an inflection point, and shear walls with larger opening rates behaved more like frame structures, experiencing greater angular deformation, with steel plate pasting negatively affecting ductility.
Article
Chemistry, Physical
Guanwei Peng, Yanyu Xie, Ying Wang, Qi Yu, Youyi Huang, Shuwu Liu, Limin Lu
Summary: Peroxymonosulfate (PMS)-assisted photocatalytic processes using S-scheme heterojunction Bi2Fe4O9/BiOBr show high efficiency in thiabendazole (TBZ) degradation, with 50 wt% Bi2Fe4O9/BiOBr exhibiting the best removal efficiency. The degradation process involves the participation of 1O2 and SO4 center dot, as confirmed by electron paramagnetic resonance (EPR) and radical trapping experiments. The degradation pathways and toxicity evolution of TBZ were assessed using HPLC-MS and ECOSAR software. This study provides new insights into the application of photocatalysis/sulfate-mediated advanced oxidation process for environmental remediation.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Jin Zou, Jiawei Liu, Yanyu Xie, Guanwei Peng, Luying Duan, Dongnan Hu, Shangxing Chen, Fengli Qu, Limin Lu
Summary: This paper proposes a photo-assisted electrochemical sensor based on bismuth molybdate/biochar (BMOC) electrode for the detection of Hg(II). The electrodeposition via the differential pulse anodic stripping voltammetry (DPASV) method generates massive electrons by photoexcitation and the abundant active sites of BMOC contribute to the high accumulation of Hg(0), which can be thoroughly oxidized under the applied electrode potential. The BMOC electrode exhibits excellent measurement performance for Hg(II) with a low detection limit, and also shows efficient photoreduction efficiency for Cr(VI) under visible light irradiation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Construction & Building Technology
Hong Lich Dinh, Jeung-Hwan Doh, Jiarui Liu, Limin Lu, Hwacheol Song, Dongcheon Park
Summary: This study investigates the mechanical properties of geopolymer mortar using waste glass cullet as the principal component for fine aggregate, with two different curing methods employed. The results show that the geopolymer mortar has compressive strength of 46 MPa and tensile strength of 2.8 MPa after 28 days of curing, which are consistent with other published studies. In addition, geopolymer demonstrates the potential to significantly reduce the carbon footprint compared to ordinary Portland cement concrete, saving 27.76% of the carbon footprint per m3. This study emphasizes the strong mechanical qualities of geopolymer products and their potential to create a new market for waste materials.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Environmental Sciences
Taoyun Cao, Limin Lu, Tangxing Jiang
Summary: One challenging task in analyzing environmental data is how to achieve better prediction in the presence of outliers. Bayesian additive regression trees (BART) is a robust approach that captures potential nonlinear relationships and complex interactions, and it has been found to have the highest prediction performance compared to other machine learning methods in simulation studies.
ENVIRONMENTAL MODELING & ASSESSMENT
(2023)
Article
Thermodynamics
J. J. Zhang, L. M. Lu, Z. Y. Zheng, L. Gan, Z. Y. Lv
Summary: In this study, the lubrication characteristics of roller-sliding bearing under oil-injected lubrication were investigated using the CFD method and fluid-structure interaction model. The results showed that the bearing rotation speed, oil velocity, oil viscosity, oil ratio, and oil temperature had a significant impact on the lubrication performance. The findings can provide valuable references for the design of roller-sliding bearings and other types of bearings.
JOURNAL OF APPLIED FLUID MECHANICS
(2023)
Article
Multidisciplinary Sciences
Limin Lu, Lina Zhao, Haihua Hu, Bing Liu, Yuchang Yang, Yichen You, Danxiao Peng, Russell L. Barrett, Zhiduan Chen
Summary: The study evaluates the spatial distribution of Chinese flowering plants and identifies hotspots of evolutionary diversity in China. Two integrative diversity indices are proposed for conservation planning, and 42 priority areas are identified. These frameworks provide a scientific basis for national park planning in China.
FUNDAMENTAL RESEARCH
(2023)