Article
Environmental Sciences
Monika Patel, Neha Bisht, Priyanka Prabhakar, Raj Kumar Sen, Pradip Kumar, Neeraj Dwivedi, Mohammad Ashiq, D. P. Mondal, Avanish Kumar Srivastava, Chetna Dhand
Summary: We developed an effective electrochemical sensor using a ternary nanocomposite of reduced graphene oxide functionalized with polydopamine and alanine for simultaneous detection of four heavy metal ions (Cd2+, Pb2+, Fe2+, and Cu2+). The sensor exhibited high sensitivity and low interference in detecting the targeted heavy metal ions in water and soil samples with detection limits and sensitivities provided.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Analytical
Jiepei Gao, Hongji Li, Mingji Li, Guilian Wang, Yongbing Long, Penghai Li, Cuiping Li, Baohe Yang
Summary: The study successfully fabricated an electrochemical plant sensor for detecting levels of tryptophan (Trp) in plants, providing important technical support for the development of precision agriculture.
ANALYTICA CHIMICA ACTA
(2021)
Article
Chemistry, Applied
Mercia V. S. Sant'Anna, Jonatas de Oliveira S. Silva, Ava Gevaerd, Lucas S. Lima, Michael D. S. Monteiro, Ingred S. C. Carregosa, Alberto Wisniewski Jr, Luiz H. Marcolino-Junior, Marcio F. Bergamini, Eliana Midori Sussuchi
Summary: A novel electrochemical sensor based on activated biochar and reduced graphene oxide was developed for the detection of paraquat in food samples. The sensor showed good response and high selectivity under optimized conditions, with a linear range from 0.74 to 9.82 μmol L-1 and a limit of detection of 0.02 μmol L-1.
Article
Chemistry, Analytical
Zicheng Li, Yingkui Guo, Hongyan Yue, Xin Gao, Shuo Huang, Xiaohua Zhang, Yanfei Yu, Haopeng Zhang, Hengwei Zhang
Summary: The combination of Ti3C2Tx MXene and graphene oxide into GMA resulted in a highly sensitive electrode for the detection of EP, with a low detection limit and good repeatability and stability when testing real urine samples.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Mansi Chaturvedi, Monika Patel, Neha Bisht, Maumita Das Mukherjee, Archana Tiwari, D. P. Mondal, Avanish Kumar Srivastava, Neeraj Dwivedi, Chetna Dhand
Summary: Tuberculosis (TB) is a devastating human illness and early diagnosis is crucial. This study proposes an electrochemical biosensor based on a ternary nanocomposite for highly sensitive and selective MTB detection. The sensor showed high sensitivity and stability, and provides a unique strategy for early MTB diagnosis. The electrochemical platform has potential for detecting various infectious pathogens and biomarkers.
Article
Chemistry, Analytical
Weihua Guo, Huiling Xu, Cheng Chen, Xiaohong Cao, Jianguo Ma, Yunhai Liu
Summary: A novel mercury-free electrochemical sensor for uranium has been developed using two-dimensional polydopamine-reduced graphene oxide (PDA-rGO) composites. The sensor exhibited good morphology and enhanced detection activity for uranium. The influence of various experimental parameters on the sensitivity of uranium measurement was studied, and the optimal conditions for detection range and detection limit were determined.
MICROCHEMICAL JOURNAL
(2022)
Article
Electrochemistry
Andrii Kachmar, Maciej Tobis, Elzbieta Frackowiak
Summary: This study investigates the use of pyrite-like structure transition metal dichalcogenides (TMDs) NiS2 in electrochemical capacitors and the preparation of reduced graphene oxide (rGO) as a substrate for NiS2 deposition. The study analyzes the influence of pH on the structural and textural properties of rGO and compares the electrochemical response of rGO samples from different pH solutions. The results show that the addition of 5 wt% NiS2 significantly improves the capacitive response, and an asymmetric cell with rGO/5 wt% NiS2 as the positive electrode and rGO pH 12 as the negative electrode achieves high capacitance and electrochemical efficiency.
Article
Chemistry, Multidisciplinary
S. Aghris, B. Chhaibi, F. E. Ettadili, O. Tahiri Alaoui, F. Laghrib, A. Farahi, M. Bakasse, A. Loukili, S. Lahrich, M. A. EL Mhammedi
Summary: This paper presents a simple and low-cost approach to synthesizing reduced graphene oxide/clay modified pencil electrode (rGO/Clay/PGE) for ultrasensitive detection of Flubendiamide (FBD). Under optimized conditions, the synthesized electrode exhibited excellent analytical properties toward FBD determination.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Energy & Fuels
Samba Sarr, Ndeye F. Sylla, Daba T. Bakhoum, Ndeye M. Ndiaye, Delvina J. Tarimo, Vusani M. Maphiri, Balla D. Ngom, Ncholu Manyala
Summary: The study reported the synthesis of VO2@S-rGO composite material and its application in supercapacitor devices, showing excellent electrochemical properties and serving as a promising candidate material for energy storage systems.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Electrochemistry
Wenshi Li, Wei Yang, Maosheng Wu, Man Zhao, Xianmao Lu
Summary: Graphene-based supercapacitors have self-discharge behavior, which limits their long-term energy storage applications. This study shows that a self-polymerized dopamine coating on the graphene surface can reduce self-discharge, leading to improved specific capacitance and rate performance.
ELECTROCHIMICA ACTA
(2022)
Article
Biochemistry & Molecular Biology
Biyun Li, Xiaoxiao Gao, Jiangang Qu, Feng Xiong, Hongyun Xuan, Yan Jin, Huihua Yuan
Summary: A photocatalytic antibacterial composite of PDA-rGO/BiVO4 was prepared and showed enhanced bacteriostatic effect against E. coli under light irradiation, indicating potential for expanding the application of BiVO4 in biomedicine.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Analytical
Jianzhi Huang, Zhixin Qiu, Jinhao Lin, Junlong Lin, Fuqing Zhu, Guohao Lai, Yanliang Li
Summary: In this study, a flower-like cobalt anchored on reduced graphene oxide (f-Co@rGO) nanocomposite was synthesized using a simple one-pot hydrothermal reduction method. The prepared f-Co@rGO/GCE electrochemical sensor achieved ultrasensitive quantitative determination of metronidazole at the nanomole per liter level, with a wide linear detection range of 0.025-500 nM and a low detection limit of 0.015 nM (S/N = 3), surpassing previous works. Moreover, the sensor was successfully used for accurate determination of metronidazole in real serum samples. The f-Co@rGO/GCE electrochemical sensor has great potential for clinical monitoring and drug quality control of metronidazole.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Physical
Justina Gaidukevic, Ruta Aukstakojyte, Jurgis Barkauskas, Gediminas Niaura, Tomas Murauskas, Rasa Pauliukaite
Summary: In this study, two different reduced graphene oxide samples were synthesized using traditional and modified Hummers methods, and it was found that one of the samples showed higher sensitivity and lower limit of detection for dopamine determination.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Analytical
Mohammad Kadivar, Alireza Aliakbar
Summary: A selective and sensitive electrochemical sensor based on reduced graphene oxide, gold nanoparticles, and molecularly imprinted poly 2-aminophenol was developed for the determination of flutamide in environmental and biological samples. Characterization of the composite material showed successful polymerization of molecularly imprinted poly 2-aminophenol, leading to high selectivity towards flutamide. The prepared sensor demonstrated good agreement with HPLC methods and can be used as a reliable alternative for flutamide analysis.
ANALYTICAL METHODS
(2021)
Article
Electrochemistry
Gizaw Tesfaye, Negussie Negash, Merid Tessema
Summary: A simple, low cost and stable electrochemical sensor for vanillin was developed using a glassy carbon electrode modified with a poly (phenylalanine) and electrochemically reduced graphene oxide composite. The sensor exhibited high electrocatalytic activity for the oxidation of vanillin, and was successfully applied for the determination of vanillin in food and soft drink samples.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Environmental Sciences
Thangavelu Kokulnathan, Tzyy-Jiann Wang, Thangapandian Murugesan, Allen Joseph Anthuvan, Rishi Ranjan Kumar, Faheem Ahmed, Nishat Arshi
Summary: Pharmaceutical pollution poses a global health threat, making accurate and rapid detection crucial. In this study, a flexible electrochemical sensor based on binder-free zinc oxide nanograins on carbon cloth (ZnO NGs@CC) was synthesized and used for the quantification of hydroxychloroquine (HCQ), a typical pharmaceutical pollutant. The ZnO NGs@CC platform exhibited superior electrochemical performance in HCQ detection, with wide sensing range, low detection limit, high sensitivity, and strong selectivity. The sensor also achieved good recovery rates in biological and environmental samples.
Article
Environmental Sciences
Selvakumar Palanisamy, Krishnapandi Alagumalai, Matteo Chiesa, Seong-Cheol Kim
Summary: A composite material consisting of functionalized carbon nanofibers (f-CNF) with neodymium oxide (Nd2O3) was developed to detect trace levels of carbendazim (CBZ) in agricultural products. The composite-modified electrode showed higher electro-oxidation ability towards CBZ compared to electrodes modified with Nd2O3 or f-CNF alone. The composite exhibited a substantial specific surface area, superior structural stability, and excellent electrocatalytic activity, resulting in enhanced sensitivity for CBZ detection.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
Thangavelu Sakthi Priya, Tse-Wei Chen, Shen-Ming Chen, Thangavelu Kokulnathan, Muthumariappan Akilarasan, Syang-Peng Rwei, Jaysan Yu
Summary: An iron diselenide (FeSe2)-modified screen-printed carbon electrode (SPCE) was successfully fabricated for the electrochemical determination of furaltadone (FLD). The FeSe2/SPCE exhibited advantageous physiochemical properties and superior catalytic performance compared to the bare SPCE for FLD sensing. The FeSe2-based platform showed wide linearity, low detection limit, and high sensitivity, making it a highly suitable candidate for real-time glucose level determination.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Thangavelu Kokulnathan, Tzyy-Jiann Wang, Faheem Ahmed, Shalendra Kumar
Summary: A novel hierarchical system of NiFe-layered double hydroxide (LDH)/Mo2C nanocomposite was fabricated through environmentally friendly deep eutectic solvents (DESs) by the solvothermal method and utilized as an electrochemical platform for NO2- detection. The NiFe-LDH/Mo2C modified glassy carbon electrode (GCE) showed superior performance compared to unmodified and other modified GCEs, with a low oxidation potential and wide working range.
JOURNAL OF MOLECULAR LIQUIDS
(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
Chemistry, Physical
Thangavelu Kokulnathan, Tzyy-Jiann Wang, Faheem Ahmed, Nishat Arshi
Summary: The development of highly-efficient electrocatalysts is crucial for detecting carbendazim (CDM) residue in the environment. In this study, nickel cobalt-layered double hydroxide (NiCo-LDH) was synthesized and used to modify the glassy carbon electrode (GCE) for the electrochemical detection of CDM. The NiCo-LDH exhibited strong electrochemical activity towards CDM sensing, with favorable analytical performance and potential application in real-time analysis.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Environmental
Tse-Wei Chen, Thangavelu Sakthi Priya, Shen -Ming Chen, Thangavelu Kokulnathan, Faheem Ahmed, Thamraa Alshahrani
Summary: In this study, praseodymium vanadate (PrVO4) was synthesized as an electrode material for the electrochemical sensor of fur-altadone (FLD) detection using green deep eutectic solvents (DES) via the solvothermal method. The PrVO4-modified electrode exhibited excellent electrochemical performance due to its high conductivity, active sites, and fast electron transfer ability. Under optimal experimental conditions, the PrVO4-modified electrode showed a dynamic linear range (0.008-91 μM), trace-level detection limit (0.002 μM), high sensitivity (4.276 μA μM-1 cm-2), and strong selectivity for FLD detection. Practical applicability of the PrVO4-modified electrode was successfully demonstrated for FLD determination in pond water, human urine, and fish samples, indicating its potential for real sample analysis. This work provides useful guidelines for the design and development of electrode materials based on DES for electrochemical sensor applications.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Thangavelu Kokulnathan, Tzyy-Jiann Wang, Faheem Ahmed, Thamraa Alshahrani
Summary: In this study, unique 3D flower-like zinc-chromium layered double hydroxides (ZnCr-LDHs) were synthesized and utilized as the electrode material for electrochemical detection of Furaltadone (FLD). The ZnCr-LDHs showed superior electrochemical performance compared to conventional materials, with wide linear ranges, low limits of detection and quantitation, high sensitivity, good reproducibility, and anti-interfering ability. The practicality of the ZnCr-LDHs/GCE was successfully demonstrated in the detection of FLD in human-urine and river-water samples.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Green & Sustainable Science & Technology
Krishnamurthy Baskar Keerthana, Shih-Wei Wu, Mu-En Wu, Thangavelu Kokulnathan
Summary: The Earth's climate change, known as global warming, is harmful to life worldwide. Carbon dioxide (CO2) emissions, particularly from the energy sector and fossil fuels, are the largest contributor to the greenhouse gas (GHG) effect. Despite a decrease in trendline compared to 2019, rising energy consumption driven by economic development, population growth, and technological advancements lead to increasing GHG emissions and pose challenges for the nation.
Article
Chemistry, Physical
Balamurugan Arumugam, Selvakumar Palanisamy, Sayee Kannan Ramaraj, Matteo Chiesa
Summary: A hydrothermal technique was used to generate a MoO3/f-MWCNTs nanocomposite as an electrode material for electrochemical detection of PTZ. Extensive characterization of the nanocomposite was done using spectroscopic and microscopic techniques. The MoO3/f-MWCNTs nanocomposite electrode showed superior electrocatalytic activity, low oxidation overpotential, low detection limit, wide linear response range, and high sensitivity for PTZ detection.
SURFACES AND INTERFACES
(2023)
Review
Engineering, Multidisciplinary
Kalaipriya Ramajayam, Selvaganapathy Ganesan, Purnimajayasree Ramesh, Maya Beena, Thangavelu Kokulnathan, Arunkumar Palaniappan
Summary: Molecularly imprinted polymers (MIPs) have gained attention in sensor development applications due to their biomimetic artificial receptor system inspired by antibody-antigen reactions. They enhance the sensitivity and specificity of optical and electrochemical sensors through precise binding to analytes. This review discusses polymerization chemistries, synthesis strategies, imprinting parameters, recent developments, and applications of MIPs in biomarker detection, environmental monitoring, and bioimaging.
Article
Chemistry, Multidisciplinary
Kalingarayanpalayam Matheswaran Arun Kumar, Elumalai Ashok Kumar, Tzyy-Jiann Wang, Thangavelu Kokulnathan, Yu-Hsu Chang
Summary: The metal-oxide semiconductor decorated with noble metal micro/nanocomposite has great potential in surface enhanced Raman spectroscopy (SERS) due to its adsorption ability and synergistic utilization of charge transfer and electromagnetic mechanisms. In this study, a Mn2O3/Ag micro/nanocomposite is synthesized and used for ultrasensitive detection of nitrofurazone (NFZ) through SERS. The Mn2O3/Ag micro/nanocomposite shows excellent SERS performance with high enhancement factor and low detection limit.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Balamurugan Arumugam, Selvakumar Palanisamy, Gandhiraj Janagaraj, Sayee Kannan Ramaraj, Matteo Chiesa, Chidambaravinayagam Subramanian
Summary: In this study, a novel electrochemical sensor was developed for the real-time detection of TCP using graphitic carbon nitride nanosheets decorated with Fe3O4 nanospheres (CN@Fe3O4) composite-modified screen-printed carbon electrodes (SPCE). The synthesis of CN nanosheets was done using the combustion technique while the co-precipitation method was used for the preparation of CN@Fe3O4 composite. The CN@Fe3O4-modified SPCE showed superior performance in TCP detection compared to CN and Fe3O4 modified SPCEs, with a linear range of 0.04-651 μM and a detection limit of 12 nM.
SURFACES AND INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
KalingarayanpalayamMatheswaran Arun Kumar, Elumalai Ashok Kumar, Tzyy-Jiann Wang, Thangavelu Kokulnathan, Yu-Hsu Chang
Summary: This study investigates the SERS performance of anisotropic Ag nanoprisms (Ag NPrs) attached onto the surface of Cu2O microspheres for the trace-level antibiotic detection of nitrofurazone (NFZ). The proposed hybrid-based SERS substrate provides superior detection performance, including high sensitivity, high enhancement factor, ultra-low limit of detection, superior spot-to-spot uniformity, and substrate-to-substrate reproducibility for NFZ detection. Furthermore, the real-sample analysis performed on NFZ in local pond water shows satisfactory recovery values.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Environmental
Alagumalai Krishnapandi, Sivakumar Musuvadhi Babulal, Shen-Ming Chen, Selvakumar Palanisamy, Seong-Cheol Kim, Matteo Chiesa
Summary: This study demonstrates the use of a ytterbium oxide nanorod/carbon nanofiber (Yb2O3/f-CNF) hybrid nanocomposite for electrochemical detection of carbendazim (CBZ) fungicide. Various physicochemical methods have been used to confirm the formation of the composite. The Yb2O3/f-CNF nanocomposite exhibits superior electrocatalytic activity for CBZ oxidation compared to Yb2O3 and f-CNF. The designed sensor has high sensitivity, low detection limit, wide linear range, and excellent stability and reproducibility.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
