Article
Chemistry, Multidisciplinary
C. G. Ann Maria, Ananya S. Agnihotri, Anitha Varghese, M. Nidhin
Summary: A sensitive and selective sensor for the detection of arsenic (iii) in polluted water samples has been developed using chitosan-stabilized silver nanoparticles (AgNPs). The synthesized silver nanoparticles have a size of 6 nm and a polydispersity index (PDI) of 0.3, enhancing the electroactive surface area and sensor sensitivity. The sensor shows high selectivity even in the presence of other possible interferents. The detection of As(iii) was performed using differential pulse anodic stripping voltammetry (DPASV), with a detection limit of 11.39 pM.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Xiao Peiwen, Li Hui, Wang Pingmei, Liu Bolun, Jing Wendan, He Lipeng, Wang Runwei, Han Xue, Zhang Zongtao, Qiu Shilun, Luo Jianhui
Summary: This study proposes a novel approach to reduce the viscosity of heavy oil using functional hierarchical zeolites. The zeolites can adsorb asphaltenes, leading to a reduction in viscosity. This method provides an economical and environmentally friendly solution for reducing heavy oil viscosity under low-temperature conditions.
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
(2022)
Article
Chemistry, Multidisciplinary
D. Thatikayala, M. T. Noori, B. Min
Summary: This paper reviews the recent progress in customizing zeolite modified electrodes (ZMEs) to develop efficient and low-cost electrodes for sensing heavy metal ions in environmental samples. The physical and chemical properties of zeolite promote favorable size and structural features for electrochemical analysis of heavy metal ions. The pore size and shape of zeolite can be customized via advanced synthesis process to achieve highly selective sensing. The present review guides researchers to develop robust sensing elements with high sensitivity and selectivity for environmental applications.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Analytical
Pramod R. Vernekar, Buddhadev Purohit, Nagaraj P. Shetti, Pranjal Chandra
Summary: A novel glucose modified carbon paste electrode (CPE) was developed for ultrasensitive detection of mefenamic acid (MA), an anti-inflammatory drug. The sensor showed high sensitivity and linear dynamic range, with high recovery rates in real sample analysis.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Milos Ognjanovic, Katarina Nikolic, Marko Boskovic, Ferenc Pastor, Nina Popov, Marijan Marcius, Stjepko Krehula, Bratislav Antic, Dalibor M. Stankovic
Summary: In this paper, an electrochemical sensor for submicromolar detection of morphine (MORPH) was developed. The sensor is based on a modified carbon paste electrode and optimized by investigating the ratio of iron tungstate in the electrode material. The results showed that the sensor has good selectivity, repeatability, and a low detection limit.
Article
Chemistry, Analytical
Eleni Lamprou, Markos Sotiriou, Panagiota M. Kalligosfyri, Despina P. Kalogianni, Theodore K. Christopoulos
Summary: MicroRNAs (miRNAs) have emerged as novel and significant biomarkers in liquid biopsy for their presence in different body fluids. While various techniques have been developed and applied for miRNA analysis, they can be time-consuming and require expensive instruments and trained personnel. Biosensors, especially nanotechnology-based ones, have been developed as alternative and valuable tools for miRNA analysis due to their simplicity, cost-effectiveness, rapid analysis, and ease of use.
Article
Chemistry, Analytical
Christina Sarakatsanou, Sophia Karastogianni, Stella Girousi
Summary: This study developed a modified glassy carbon electrode with saffron conjugated silver nanoparticles to determine amoxicillin antibiotic in urine samples. The modified electrode exhibited enhanced electrocatalytic activity and showed promising results for the sensitive determination of amoxicillin in biological samples.
ANALYTICAL METHODS
(2023)
Article
Chemistry, Analytical
Christina Sarakatsanou, Sophia Karastogianni, Stella Girousi
Summary: In this study, a modified glassy carbon electrode with saffron conjugated silver nanoparticles was developed for the determination of amoxicillin antibiotic in urine samples. The modified electrode showed enhanced electrocatalytic activity and exhibited a linear calibration curve in the concentration range from 1.273 x 10-4 g L-1 to 2.217 x 10-3 g L-1. The method showed potential for the sensitive and selective determination of amoxicillin in urine samples, with a detection limit of 9.739 x 10-6 g L-1.
ANALYTICAL METHODS
(2023)
Article
Materials Science, Paper & Wood
Kanyapat Teekayupak, Nipapan Ruecha, Orawon Chailapakul, Nadnudda Rodthongkum
Summary: A flexible electrochemical sensor platform based on modified cotton fibers was developed for the non-enzymatic detection of uric acid, showing high sensitivity and a linear detection range suitable for patients with uric acid levels higher than 4.46 mM. The sensor platform was also found to be unaffected by the presence of other physiological compounds in human urine, highlighting its potential for rapid detection and screening of gout disease when integrated into a diaper.
Article
Chemistry, Analytical
M. Hassannia, N. Fahimi-Kashani, M. R. Hormozi-Nezhad
Summary: This study developed a colorimetric sensor array for accurate identification and determination of multiple antibiotics using aggregation of gold nanoparticles and machine learning algorithms. The results demonstrated the potential applicability of this sensor array in multiplex detection of antibiotics.
Article
Electrochemistry
Katarzyna Fendrych, Radoslaw Porada, Boguslaw Bas
Summary: In this paper, an ultrasensitive and highly selective analytical method for the determination of mesalazine was developed and successfully applied in pharmaceuticals, environmental waters, and biological fluids. The method exhibited a significant enhancement effect in the oxidation peak current of mesalazine.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Damin Lee, Jong Jin Kim, Mansoor Ali, Jin Woo Choung, Won Bo Lee, Jong Wook Bae, Myung-June Park
Summary: A new kinetic model based on dual-cycle reaction mechanism was developed to synthesize gasoline-range hydrocarbons from dimethyl ether over a nanostructured ZSM-5 catalyst. The model accurately predicted product selectivity and yield variations with operating conditions.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Liudmila L. Larina, Oleksii Omelianovych, Van-Duong Dao, Kyunglim Pyo, Dongil Lee, Ho-Suk Choi
Summary: This study quantifies energy band alignments at a nanostructured TiO2/Au-22(SG)(18) cluster interface using X-ray photoelectron spectroscopy, finding evidence of a finite optical energy gap in Au clusters and determining the pinning position of the Fermi energy level at the interface. The results provide insights for improving the efficiency of metal-cluster-sensitized solar cells and increasing the open-circuit voltage by proper modifications based on the energy levels detected.
Article
Chemistry, Analytical
Biuck Habibi, Ali Pashazadeh, Sara Pashazadeh, Lotf Ali Saghatforoush
Summary: Here, we synthesized a highly electro-catalytically active composite material and characterized it using various instrumental techniques. The results showed that the prepared material exhibited high efficiency for hydrazine detection at low oxidation overpotential, with a wide linear range and sensitivity, as well as fast response time, high stability, and good repeatability.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Endale Tesfaye, Bhagwan Singh Chandravanshi, Negussie Negash, Merid Tessema
Summary: This paper presents the fabrication and characterization of a modified carbon paste electrode (CPE) for the sensitive and selective determination of Cu(ii). The developed electrode showed high selectivity, sensitivity, and reproducibility, and was successfully applied for quantification of Cu(ii) in various samples.
Article
Engineering, Chemical
Aurelia R. O. Ferreira, Joaquin Silvestre-Albero, Martin E. Maier, Nagila M. P. S. Ricardo, Celio L. Cavalcante, F. Murilo T. Luna
Summary: In this study, biolubricants were synthesized from vegetable oils through esterification reactions using sulfonated mesoporous silica as catalyst. The sulfonic surface group on the catalyst significantly influenced the esterification reaction, and the functionalization of the catalyst led to a decrease in surface area and pore diameter. The sulfonated catalyst exhibited high conversions and selectivities.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Thermodynamics
S. Reljic, C. Cuadrado-Collados, E. Oliveira Jardim, J. Farrando-Perez, M. Martinez-Escandell, J. Silvestre-Albero
Summary: Activated carbon materials synthesized from non-essential amino acids exhibit a tailored porous structure and rich multifunctional surface chemistry, resulting in improved hydrophilic character and excellent CO2 adsorption performance. Samples with low activation degree show molecular sieving properties with high selectivity ratios.
FLUID PHASE EQUILIBRIA
(2022)
Article
Chemistry, Physical
Tim Van Everbroeck, Aggeliki Papavasiliou, Radu-George Ciocarlan, Evangelos Poulakis, Constantine J. Philippopoulos, Erika O. Jardim, Joaquin Silvestre-Albero, Elias Sakellis, Pegie Cool, Fotios K. Katsaros
Summary: This study investigates the effect of different alumina supports on the dispersion of CuO and the performance of three-way-catalytic converters (TWC). The results show that alumina samples synthesized via soft-templating routes have a large surface area and low crystallinity, which favor the formation of highly dispersed and strongly bonded CuO species. The use of amorphous mesoporous alumina completely prevents the formation of crystalline CuO even at high metal loading. The catalytic evaluation of this material demonstrates an enhanced oxidation activity with increasing metal loading.
Article
Biochemical Research Methods
Laura Ripoll, Javier Rayos, Miguel Angel Aguirre, Lorena Vidal, Antonio Canals
Summary: This article presents a new analytical method for mercury speciation in water samples using a natural deep eutectic solvent (NADES). The NADES, decanoic acid and DL-menthol in a molar ratio of 1:2, is used as an environmentally friendly extractant for separation and preconcentration before LC-UV-Vis. The method shows good performance with low detection limits and acceptable relative standard deviations (RSD), and it has been evaluated using real water samples from different sources.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Medical Laboratory Technology
Miren Alustiza, Laura Ripoll, Antonio Canals, Oscar Murcia, Alejandro Martinez-Roca, Anabel Garcia-Heredia, Mar Giner-Calabuig, Rodrigo Jover, Lorena Vidal
Summary: This study aims to identify volatile organic compounds in fecal samples as biomarkers for colorectal cancer (CRC) detection. The analysis of 80 participants' fecal samples showed that p-cresol and 3(4H)-dibenzofuranone were significantly more abundant in cancer samples, with high sensitivity and specificity. Combining the use of these compounds improved the detection of cancer, and p-cresol also showed potential as a biomarker for pre-malignant lesions.
CLINICA CHIMICA ACTA
(2023)
Article
Chemistry, Physical
Judit Farrando-Perez, Maria Rodriguez-Castillo, Manuel Martinez-Escandell, Miguel Monge, Joaquin Silvestre-Albero
Summary: HKUST-1-based composites with high quality crystals and improved thermal management properties have been successfully synthesized by incorporating synthetic graphite flakes in the MOF synthesis media. The composites also show significant preservation of adsorption properties for hydrogen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Stephen Lyons, Paola Baile Pomares, Lorena Vidal, Katie McGarry, Aoife Morrin, Dermot F. F. Brougham
Summary: Phenylboronic acids play a crucial role as synthetic receptors by reversibly binding to cis-diols in molecular sensing. When combined with magnetic iron oxide nanoparticles, they have potential applications in separations and enrichment. However, further research is needed to understand their binding modes, capacity, stability, and extractability in complex environments.
Article
Chemistry, Multidisciplinary
Peng Ren, Tong Zhang, Noopur Jain, H. Y. Vincent Ching, Aleksander Jaworski, Giovanni Barcaro, Susanna Monti, Joaquin Silvestre-Albero, Veronica Celorrio, Lata Chouhan, Anna Rokicinska, Elke Debroye, Piotr Kustrowski, Sabine Van Doorslaer, Sandra Van Aert, Sara Bals, Shoubhik Das
Summary: In this study, we have successfully created a new aryl amino-substituted graphitic carbon nitride (g-C3N4) catalyst with atomically dispersed Mn that is capable of directly generating hydrogen peroxide (H2O2) from seawater. This catalyst showed excellent reactivity, achieving up to 2230 μM H2O2 in 7 hours from alkaline water and up to 1800 μM from seawater under the same conditions. The catalyst can be easily recovered and reused without any significant loss in performance. The generation of H2O2 in this catalyst occurred through a unique two-electron water oxidation reaction process involving both direct and indirect pathways.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Damian Uriarte, Natalia Gomez, Antonio Canals, Claudia Domini, Mariano Garrido
Summary: For the first time, an on-line synthesis of CDots is proposed using the flow injection analysis (FIA) technique for the determination of aluminium in water samples. The nanoparticles were obtained from the carbonization of glucose and iron(III) in an acidic medium, and their photoluminescence was enhanced by aluminium ions. The proposed method showed good linearity (R2 = 0.9999) within a range of 0.04 - 3.0 mg L-1 and a detection limit of 0.007 mg L-1. The analysis of drinking water and groundwater samples demonstrated accurate results with recoveries ranging from 91 to 113% and RSD% < 13%. The on-line system exhibited a high sample throughput of 36 h-1 without the need for incubation time.
Article
Chemistry, Analytical
Sergio J. Abellan-Martin, Miguel Angel Aguirre, Antonio Canals
Summary: This study revisits the determination of metals in engine lubricating oils using microwave induced plasma atomic emission spectrometry (MIP OES). A new multinebulizer and the standard dilution analysis (SDA) calibration methodology were utilized to overcome the instability of the microwave plasma caused by organic solvents. The results show that SDA calibration performs similarly to conventional calibration methods, but with lower reagent consumption, easier operation, and shorter analysis time when combined with the multinebulizer.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Chemistry, Analytical
Sergio J. Abellan-Martin, David Villalgordo-Hernandez, Miguel Angel Aguirre, Enrique V. Ramos-Fernandez, Javier Narciso, Antonio Canals
Summary: A new environmentally friendly analytical method using ICP OES and MDSPE techniques has been developed for the simultaneous determination of multiple metal elements in wastewater. The method was optimized and evaluated, demonstrating high sensitivity and negligible matrix effects.
Article
Chemistry, Analytical
D. Stoitsov, V. Kmetov, A. Canals
Summary: A new method combining a continuous flow photochemical vapor generator (PVG) with a modified multimode sample introduction system (MSIS) is proposed for trace mercury analysis. After optimization, a low detection limit can be achieved, and the method is applicable to mercury analysis in different samples.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Materials Science, Multidisciplinary
Snezana Reljic, Manuel Martinez-Escandell, Joaquin Silvestre-Albero
Summary: The aim of this study was to investigate the adsorption performance of a petroleum pitch-based activated carbon before and after treatment with H2S. Micro-porous activated carbon with a highly developed porous structure was produced via chemical activation. The functionalized activated carbons showed improved total uptake after H2S treatment, and the microporous structure was found to be the main factor affecting adsorption performance.
C-JOURNAL OF CARBON RESEARCH
(2022)
