Article
Chemistry, Inorganic & Nuclear
Tengyue Li, Xun He, Zhengwei Cai, Xiaoya Fan, Kai Dong, Yongchao Yao, Lang He, Dongdong Zheng, Shengjun Sun, Yongsong Luo, Junhao Chen, Zhenju Jiang, Xuping Sun
Summary: This study presents a highly efficient Fe nanoparticle-decorated pinewood-derived carbon electrocatalyst for the conversion of NO2- to NH3. The catalyst exhibits impressive NH3 yield, high Faradic efficiency, and robust stability under ambient conditions.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Sergei A. Chernyak, Dmitrii N. Stolbov, Konstantin I. Maslakov, Ruslan V. Kazantsev, Oleg L. Eliseev, Dmitry O. Moskovskikh, Serguei V. Savilov
Summary: In this study, new bulk and dense potassium promoted iron-based catalysts supported on N-doped carbon nanomaterials were synthesized using spark plasma sintering for hydrocarbon synthesis from syngas. The sintered catalysts showed high activity and selectivity, attributed to the high dispersity of iron carbide particles and potassium promotion of iron carbide formation. This study demonstrates a fast method to prepare bulk N-doped carbon-supported iron catalysts for efficient hydrocarbon synthesis, highlighting their potential for syngas conversion.
Article
Chemistry, Applied
Oukrit Thonganantakul, Sira Srinives, Weerawut Chaiwat, Konrat Kerdnawee, Komkrit Suttiponparnit, Tawatchai Charinpanitkul
Summary: The study focused on the synthesis of carbon nanotubes using iron oxide embedded on graphene oxide as a catalyst, with different pretreatment and synthesis temperatures leading to the formation of either CNTs or carbon spheres.
Article
Chemistry, Multidisciplinary
Florina Pogacean, Codruta Varodi, Lidia Magerusan, Stela Pruneanu
Summary: This article presents the development of an electrochemical sensor based on graphene/glassy carbon electrode for trace level detection of nitrite in water samples. The sensor exhibits remarkable enhanced sensing response towards nitrite compared to the bare electrode (three orders of magnitude higher). It also demonstrates excellent operational stability, repeatability, and interference capability, and shows excellent results in the practical application test in commercially available waters.
Review
Chemistry, Multidisciplinary
Huijuan Cui, Yibo Guo, Zhen Zhou
Summary: 3D graphene macrostructures with unique structure, large accessible surface area, and active sites have shown promising potential in electrocatalysis. This review focuses on the latest progress in the field, covering preparation methods, functional modification strategies, and detailed discussion on electrocatalytic performances. Challenges and perspectives are also presented for further exploration of excellent 3D GM-based electrocatalysts.
Article
Chemistry, Physical
Jiangfeng Yuan, Hanqing Yin, Xiaoxin Jin, Dan Zhao, Yuan Liu, Aijun Du, Xiaoqiang Liu, Anthony P. O'Mullane
Summary: The conversion of nitrite ions into ammonia via an electrochemical process is significant due to its potential in addressing the energy-intensive ammonia production and substantial environmental pollution caused by nitrite ions. A study successfully prepared iron phosphide nanoarrays on a Ti plate and utilized it as an efficient catalyst for the conversion of nitrite ions into ammonia. The optimized parameters and mechanistic studies revealed that atomic hydrogen greatly influenced the reaction rate and selectivity, and specific facets of FeP were identified as the main active sites for nitrite reduction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Xiaoli Liu, Hongxia Zhang, Junping Ma, Jianbin Zheng
Summary: A novel non-enzymatic nitrite (NO2-) electrochemical sensor based on Au-poly(thionine) and tin oxide/graphene nanosheets (Au-PTH/SGN) nanocomposites was successfully fabricated. The sensor exhibited a wide linear range and high sensitivity, and achieved satisfactory detection results in tap water and sewage samples.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Applied
K. R. Venugopala Mounesh, K. R. Venugopala Reddy, Anup Pandith, Gaber E. Eldesoky, Bhari Mallanna Nagaraja
Summary: This work synthesized a novel nickel phthalocyanine compound and confirmed its structure using spectroscopic-microscopic methods and electrochemical analysis. The synthesized NiTBBTCAPc-MWCNTs showed enhanced electron transferring ability and electrocatalytic activity compared to bare GCE and other composite materials. The sensor exhibited fast response, good stability, and high selectivity towards nitrite. The modified electrode was successfully applied for quantitative detection of nitrite in drinking water and cabbage vegetable samples.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Jiaqi Yu, Anna F. Kolln, Dapeng Jing, Jinsu Oh, Hengzhou Liu, Zhiyuan Qi, Lin Zhou, Wenzhen Li, Wenyu Huang
Summary: A one-pot, two-step hot injection method was developed to prepare Cu6Sn5-Sn hybrid intermetallic-metal nanoparticles with an anisotropic structure, which showed high activity in electrocatalytic nitrate reduction reaction, selectively producing nitrite within a wide reduction potential window.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Guilherme Oliveira Vargas, Carlos Schnorr, Franciane Bastista Nunes, Theodoro da Rosa Salles, Mariana Zancan Tonel, Solange Binotto Fagan, Ivana Zanella da Silva, Luis F. O. Silva, Sergio Roberto Mortari, Guilherme Luiz Dotto, Cristiano Rodrigo Bohn Rhoden
Summary: This study reports the synthesis of magnetic graphene oxide (GO Fe3O4) with different amounts of iron nanoparticles for the adsorption of furosemide (FUR). The optimal adsorbent was found to be GO Fe3O4 1:1, with a removal percentage and adsorption capacity of 96.15% and 96.91 mg g-1, respectively, at pH 3.0 and 293.15 K. The process was influenced by initial concentration, adsorbent dosage, and pH, while the ionic strength had minimal effect on the performance of GO Fe3O4 1:1. Sips and PSO models were the best fit for the experimental data, indicating a heterogeneous surface. GO Fe3O4 1:1 exhibited high removal percentage even after several cycles of adsorption/desorption.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Jaana Lilloja, Elo Kibena-Poldsepp, Ave Sarapuu, Anastasiia Konovalova, Maike Kaarik, Jekaterina Kozlova, Paarn Paiste, Arvo Kikas, Alexey Treshchalov, Jaan Aruvali, Andrea Zitolo, Jaan Leis, Aile Tamm, Vambola Kisand, Steven Holdcroft, Kaido Tammeveski
Summary: Transition-metal and nitrogen-doped graphene-like material and carbon nanotube composites are synthesized and utilized as cathode catalysts in anion exchange membrane fuel cells. The materials exhibit similar physicochemical properties and electrocatalytic performances with different yields of HO2- formation. The M-N-Gra/CNT catalysts, especially CoFe-N-Gra/CNT, combined with Aemion+ reinforced anion-exchange membrane, show excellent AEMFC performance comparable to that of Pt/C with a peak power density of 638 mW cm(-2), attributed to the presence of M-Nx sites, carbon-encapsulated transition-metal nanoparticles, and nitrogen-containing moieties.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Rui Lobo, Jorge Ribeiro, Filipe Inok
Summary: The molecular beam-thermal desorption spectrometry technique was used to monitor hydrogen uptake and release in carbon nanotube networks, improving signal-to-noise ratio for accurate determination of hydrogen mass in electrodes. The hydrogen desorption mass spectra indicated enhanced surface capability for hydrogen adsorption in electrodes and confirmed the enhanced hydrogen storage capacity of carbon nanotube assemblies, suggesting their potential as replacements for heavier metal alloys in electrocatalysis.
Article
Chemistry, Physical
Dhanaji Jawale, Frederic Fossard, Frederic Miserque, Valerie Geertsen, Anne-Lucie Teillout, Pedro de Oliveira, Israel M. Mbomekalle, Edmond Gravel, Eric Doris
Summary: In this study, electroactive hybrid nanomaterials were assembled by non-covalent, layer-by-layer deposition of tungsten-based polyoxometalates on carbon nanotubes. Chemical functionalization allowed for the homogeneous coverage of polyoxometalates on the nanotubes. Electrochemical characterization highlighted the positive contribution of the nanotube platform to the stability and catalytic performance of immobilized POM species when applied to the hydrogen evolution reaction.
Article
Biochemistry & Molecular Biology
Douglas P. M. Saraiva, Daniel V. Braga, Bruna Bossard, Mauro Bertotti
Summary: Nitrite is a common pollutant in modern society. Developing new strategies for its determination is crucial, and electroanalytical methods show excellent performance in this task. However, using bare electrodes is not recommended due to their susceptibility to poisoning and passivation. We present a procedure to overcome these limitations on carbon fiber microelectrodes through pulsed amperometry. A three-pulse amperometry approach significantly reduces current decay and the proposed sensor demonstrates good repeatability and reproducibility in detecting nitrite in tap water and synthetic inorganic saliva samples.
Article
Chemistry, Multidisciplinary
Manjushree Somashettihalli Gangadharappa, Madihalli Srinivas Raghu, Sandeep Kumar, Lakshminarayana Parashuram, Velu Udaya Kumar
Summary: The sensor based on hybrid Mn3+/4+ : ZrO2 nanoganitrus prepared via hydrothermal method shows high selectivity and sensitivity in detecting nitrite, with a wide linear range, low detection limit, and stable performance.
Article
Chemistry, Multidisciplinary
Naveen Karuppusamy, Vinitha Mariyappan, Shen-Ming Chen, Rasu Ramachandran
Summary: In this study, a CaWO4/RGO nanocomposite was prepared by a hydrothermal method, and it exhibited excellent electrocatalytic performance for the detection of enrofloxacin. The sensor showed a low limit of detection, a wide linear range, good selectivity, stability, and reproducibility.
Article
Chemistry, Multidisciplinary
Praveen Kumar Gopi, Subburaj Srinithi, Shen-Ming Chen, Chandan Hunsur Ravikumar
Summary: This study reports on the electrochemical properties of well-designed GdBiVO4@rGO nanocomposite fabricated by a facile hydrothermal method for detecting chloramphenicol. Various characterization techniques were used to evaluate the surface morphology and electrochemical sensing properties of the synthesized material, showing excellent response towards the CP drug in food samples.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Ramadhass Keerthika Devi, Muthusankar Ganesan, Tse-Wei Chen, Shen-Ming Chen, Xiaoheng Liu, M. Ajmal Ali, Saeedah M. Almutairi, Murugan Sethupathi
Summary: In this study, a nitrogen-doped carbon quantum dot decorated gadolinium oxide nanocomposite was synthesized through hydrothermal synthesis for the first time. The nanocomposite exhibited a nanoseed-like structure and showed excellent performance as an electrode material for the electrochemical detection of an antibiotic drug. The developed sensor demonstrated a low detection limit, high sensitivity, and good stability, repeatability, and reproducibility in real sample analysis.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Analytical
Walaa Khushaim, Veerappan Mani, Karthik Peramaiya, Kuo-Wei Huang, Khaled Nabil Salama
Summary: This study reports the synthesis of ruthenium nanoparticles and nickel molybdate nanorods functionalized porous graphitic carbon nitrides for the fabrication of sensitive and selective biosensors for cardiac troponin I. The biosensors showed a wide working range, low limit of detection, high selectivity, and practical applicability.
Article
Chemistry, Analytical
Walaa Khushaim, Mani Teja Vijjapu, Saravanan Yuvaraja, Veerappan Mani, Khaled Nabil Salama
Summary: A transistor-based biosensor has been developed for rapid and sensitive detection of cardiac troponin-I, a biomarker of acute myocardial infarction. The biosensor, which combines a field effect transistor with nanosheet materials, has demonstrated high sensitivity and a wide dynamic range. This compact microsystem has the potential to revolutionize the detection of cardiac biomarkers.
Article
Electrochemistry
Balamurugan Karupppaiah, Anupriya Jeyaraman, Shen -Ming Chen, Yu-Ching Huang
Summary: The construction of highly sensitive electrochemical sensors is crucial for detecting pharmaceutical drugs due to their significant pollution in aqueous systems. In this study, we developed a highly sensitive electrochemical sensor for ronidazole (RNZ), a veterinary antibiotic drug. The electrode was fabricated using cobalt oxide nanorods integrated with hexagonal boron nitride-modified glassy carbon electrode (CoCo2O4 NRs/h-BN/GCE). The electrocatalytic activity of CoCo2O4 NRs/h-BN/GCE was analyzed, and it showed the highest sensitivity for RNZ detection with a low limit of detection (3 nM) and high sensitivity (5.845 mu A mu M-1 cm-2).
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Venkatachalam Vinothkumar, Rajalakshmi Sakthivel, Shen-Ming Chen, Arumugam Sangili, Tae Hyun Kim
Summary: In this study, a Sr@Mn3O4 anchored graphene oxide (GO) electrocatalyst was developed for the detection of nitrofurantoin (NFT). The synergistic activity of Sr@Mn3O4 with GO enhances the specificity and sensitivity of NFT detection. The fabricated Sr@Mn3O4/GO-modified electrode shows a wide dynamic linear range, low limit of detection, and good sensitivity for NFT.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Materials Science, Multidisciplinary
Saptami Suresh Shetty, Jehad K. El-Demellawi, Yusuf Khan, Mohamed N. Hedhili, P. Arul, Veerappan Mani, Husam N. Alshareef, Khaled Nabil Salama
Summary: The research team synthesized Ti3C2Tx MXene nanosheets stabilized with iron single-atom catalysts (Fe-SACs) as efficient electrocatalysts for the determination of catecholamine in neuroblastoma and pheochromocytoma. The Fe-SACs/Ti3C2Tx sensor showed low oxidation overpotentials, high signal amplifications, and sensitive detection limits for dopamine and its end-products. It was found to be practically useful in tracking the in situ production of dopamine and analyzing human urine samples, making it a sensitive diagnostic platform for evaluating tumor progression and cellular dopamine communications.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Physical
Namasivayam Kumaragurubaran, P. Arul, Sheng-Tung Huang, C. Nandhini, Veerappan Mani, Chih-Hung Huang
Summary: A fouling-free H2S sensor was developed based on a bimetallic Ni-Co-MOF with PEDOTs and PoPDA, exhibiting enhanced catalytic performance and high selectivity.
APPLIED SURFACE SCIENCE
(2023)
Article
Biophysics
Saptami Suresh Shetty, Basem Moosa, Li Zhang, Buthainah Alshankiti, Walaa Baslyman, Veerappan Mani, Niveen M. Khashab, Khaled Nabil Salama
Summary: In this study, a polyoxometalate-γ-cyclodextrin metal-organic framework (POM γCD MOF) was used as an electrocatalyst to create highly selective sensors for dopamine detection. The POM γCD MOF generated multiple signals for dopamine, including electrochemical, colorimetric, and smartphone read-outs. This research has the potential to significantly impact the diagnosis and treatment of dopamine-related diseases.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Electrochemistry
Tse-Wei Chen, Rasu Ramachandran, Pitchaimani Veerakumar, Shen-Ming Chen, Vishnu Priya Veeraraghavan, Vinitha Mariyappan, Ramanujam Kannan, Paulsamy Raja
Summary: Heterogeneous based functionalized nanocomposite materials have attracted significant attention in energy storage and conversion due to their fast electron transfer process and long life cycles. This review briefly discusses various techniques used for fabricating carbon based nanocomposites, such as sol-gel, hydrothermal, in situ polymerization, and electrochemical methods. Functionalized carbon decorated nanocomposites have become the focus of future energy technologies, especially for their larger electrode surface area, high mechanical strength, excellent electrochemical properties, and rapid electrochemical redox behavior. The advancements in nanoscale based composite devices provide a platform for developing new energy storage technology to meet global energy demands. Finally, the review summarizes the recent advantages of carbon supported composites, which significantly enhance their electrochemical energy storage device properties, including high capacitance and boosted specific capacitive values.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Saranvignesh Alagarsamy, Ruspika Sundaresan, Tse-Wei Chen, Shen-Ming Chen, Bih-Show Lou, Balaji Ramachandran, Sayee Kannan Ramaraj, M. Ajmal Ali, Mohamed S. Elshikh, Jaysan Yu
Summary: Research in rare-earth metal molybdates, especially gadolinium molybdate (GdM), has gained interest due to their unique properties. In this study, GdM was synthesized using reduced graphene oxide (RGO). The GdM/RGO nanocomposite was then used for the electrochemical detection of metol (ML), showing excellent electrical properties. The GdM/RGO sensor exhibited a low detection limit and a wide linear range for ML determination.
MICROCHEMICAL JOURNAL
(2023)
Article
Automation & Control Systems
Jose Ilton de Oliveira Filho, Murilo Calil Faleiros, Daisy Camargo Ferreira, Veerappan Mani, Khaled Nabil Salama
Summary: Two significant issues in biosensors, selectivity and background noise, can't be solved by conventional analytical methods. The application of embedded machine learning in removing background interference is still unexplored. Implementing machine learning into devices and sensors can enhance their reliability in discerning responses, and applying these models to portable devices can further improve point-of-care usage, continuous monitoring, and viral mutation assessments.
ADVANCED INTELLIGENT SYSTEMS
(2023)
Review
Chemistry, Multidisciplinary
Rasu Ramachandran, Tse-Wei Chen, Pitchaimani Veerakumar, Ganesan Anushya, Shen-Ming Chen, Ramanjam Kannan, Vinitha Mariyappan, Selvam Chitra, Nagappan Ponmurugaraj, Muthusamy Boominathan
Summary: Water electrolysis is a promising method for producing hydrogen, which can meet the global energy demand. Hydrogen-based fuel cell transportation has zero greenhouse emissions and improves air quality, while also providing economically viable green energy for electrochemical applications. Many countries are focusing on the development of renewable and hydrogen-based energy storage infrastructure to meet their growing energy demands and sustainable goals.
Article
Chemistry, Multidisciplinary
Nandini Nataraj, Shen-Ming Chen, Siva Kumar Krishnan
Summary: This study presents a simple approach to preparing a nanocomposite, SrV/GCN, and explores its application for the simultaneous electrochemical detection of antibiotic drugs ACAMP and LEV. The SrV/GCN/GCE sensor exhibits high sensitivity, wide linear range, and low detection limit for ACAMP and LEV, as well as exceptional selectivity and operational stability. The practical use of the sensor is validated in real samples, showing promising opportunities for practical clinical analysis.
ENVIRONMENTAL SCIENCE-NANO
(2022)
