المؤلفون: Mayuri S. More, Gajanan A. Bodkhe, Fouran Singh, Babasaheb. N. Dole, Tibor Hianik, Mahendra D. Shirsat

المصدر: Engineering Proceedings, Vol 48, Iss 1, p 32 (2023)

مصطلحات موضوعية: graphene, reduced graphene oxide, metal-organic framework, chemiresistive, ammonia, Engineering machinery, tools, and implements, TA213-215

الوصف: The detection of ammonia is very crucial for the welfare of modern society because of its hazardous effect on the environment and human beings. High response time is one of the serious concerns of most of the ammonia detectors reported so far in the literature. This issue has been comprehensively addressed in the present investigation. Herein, the solvothermally synthesized Cu-BTC was combined with the 5 wt%, 10 wt% and 20 wt% of partially reduced graphene oxide (rGO). The structural, spectroscopic, morphological and electrical studies of as-synthesized CuBTC@rGO-5wt%, CuBTC@rGO-10wt% and CuBTC@rGO-20wt% were done by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, atomic force microscopy, and current-voltage (I-V) characterization. The chemiresistive sensor based on Cu-BTC@rGO was developed on a copper-coated glass electrode via the shadow mask technique. It shows excellent sensing properties for CuBTC@rGO-10wt% in a range of 10 ppm to 80 ppm with a high stability of up to 30 days, good linearity, and excellent response/recovery time, i.e., 84 s and 125 s, respectively. The limit of detection has been established as 10 ppm, which is below the maximum residue limit established by the OSHA (Occupational Safety and Health Administration).

وصف الملف: electronic resource

العلاقة: https://www.mdpi.com/2673-4591/48/1/32Test; https://doaj.org/toc/2673-4591Test

الوصول الحر: https://doaj.org/article/6c50e75dfd5d44728511236669dd158eTest

المؤلفون: Hamed Y. Mohammed, Maamon A. Farea, Pasha W. Sayyad, Nikesh N. Ingle, Theeazen Al-Gahouari, Manasi M. Mahadik, Gajanan A. Bodkhe, Sumedh M. Shirsat, Mahendra D. Shirsat

المصدر: Journal of Science: Advanced Materials and Devices, Vol 7, Iss 1, Pp 100391- (2022)

مصطلحات موضوعية: GO/PANI, Ammonia, Carbon monoxide, Chemiresistive, IDE, Materials of engineering and construction. Mechanics of materials, TA401-492

الوصف: In this work, the influence of Graphene oxide (GO) on the sensing performance of Polyaniline (PANI) toward NH3 and CO gases at room temperature (RT) was comprehensively studied. The PANI/GO nanocomposite was synthesized by the “in-situ chemical oxidation polymerization” route in the presence of GO. The optical, spectroscopic and structural properties of as-prepared materials were studied through UV–vis, FTIR, RAMAN spectroscopies and XRD. Additionally, the topological investigations of materials were carried out by Atomic Force Microscopy (AFM). The sensors were fabricated via drop-casting of the pure PANI and PANI/GO nanocomposite on a low-cost pattern of Cu interdigitated electrodes (IDE). The sensors based on the PANI/GO nanocomposite exhibited a better-sensing performance for NH3 than those of bare PANI. The present finding indicates that the PANI/GO-based sensor exhibits high response (9.6%–70 ppm), fast recovery time (23 s), low detection limit (30 ppm) and linear dynamic range (30–230 ppm) with excellent repeatability, reproducibility, long-term stability and exceptional selectivity for NH3 sensing. Thus, the PANI/GO-based sensor has a high potential for high-performance sensing applications.

وصف الملف: electronic resource

العلاقة: http://www.sciencedirect.com/science/article/pii/S2468217921000678Test; https://doaj.org/toc/2468-2179Test

الوصول الحر: https://doaj.org/article/8f3b8890910944c8b11fffa1fa25aff7Test

المؤلفون: Gajanan A. Bodkhe, Bhavna S. Hedau, Megha A. Deshmukh, Harshada K. Patil, Sumedh M. Shirsat, Devdatta M. Phase, Krishan K. Pandey, Mahendra D. Shirsat

المصدر: Frontiers in Chemistry, Vol 8 (2020)

مصطلحات موضوعية: differential pulse voltammetry (DPV), electrochemical sensor, gold nanoparticles, metal organic frameworks, CuBTC MOF, Chemistry, QD1-999

الوصف: In the present investigation, copper benzene tricarboxylate metal organic frameworks (CuBTC MOF) and Au nanoparticle incorporated CuBTC MOF (Au@CuBTC) were synthesized by the conventional solvothermal method in a round bottom flask at 105°C and kept in an oil bath. The synthesized CuBTC MOF and Au@CuBTC MOFs were characterized by structure using X-ray diffraction (XRD) spectroscopic methods including Fourier Transform Infrared spectroscopy, Raman Spectroscopy, X-ray Photoelectron Spectroscopy (XPS), and Energy dispersive spectroscopy (EDS). We also characterized them using morphological techniques such as Field emission scanning electron microscopy (FE-SEM), and electrochemical approaches that included cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). We examined thermal stability by thermogravimetric analysis (TG/DTA) and N2 adsorption—desorption isotherm by Brunauer-Emmett-Teller (BET) surface area method. Both materials were tested for the detection of lead (II) ions in aqueous media. Au nanoparticle incorporated CuBTC MOF showed great affinity and selectivity toward Pb2+ ions and achieved a lower detection limit (LOD) of 1 nM/L by differential pulse voltammetry (DPV) technique, which is far below than MCL for Pb2+ ions (0.03 μM/L) suggested by the United States (U.S.) Environmental Protection Agency (EPA) drinking water regulations.

وصف الملف: electronic resource

العلاقة: https://www.frontiersin.org/article/10.3389/fchem.2020.00803/fullTest; https://doaj.org/toc/2296-2646Test

الوصول الحر: https://doaj.org/article/217e9bccbb754c6c879baeb049d350c6Test

المؤلفون: S. N. Botewad, V. G. Pahurkar, G. G. Muley, D. K. Gaikwad, Gajanan A. Bodkhe, Mahendra D. Shirsat, P. P. Pawar

المصدر: Frontiers in Materials, Vol 7 (2020)

مصطلحات موضوعية: optical fiber, urea, PANI-ZnO, evanescent wave absorption, cladding modification, Technology

الوصف: In the present investigation, we demonstrated a simple, rapid, and highly sensitive cladding-modified optical fiber urea sensor based on the evanescent wave absorption (EWA) technique. Cladding modification was performed over a 2-cm unclad portion of optical fiber using a polyaniline-zinc oxide (PANI-ZnO) matrix with enzyme-Urease (Urs) cross-linked to it using glutarldehyde as a cross-linking agent. The PANI-ZnO matrix was characterized by X-ray diffraction, scanning electron microscopy, ultraviolet-visible, and Fourier transform-infrared spectroscopy to explore its various properties. The developed sensor shows a linear response to urea concentration in the range 10 nM−1 M in the form of the absorption spectrum at a wavelength of ~250 nm with specific selectivity. Under the proper conditions (storage at temperature 4°C after each measurement), it shows 40-day stability without any decrement in the intensity of the absorption spectrum. Thus, the developed sensor is highly sensitive, stable, and specific, with a lower detection limit of a urea concentration of 10 nM.

وصف الملف: electronic resource

العلاقة: https://www.frontiersin.org/article/10.3389/fmats.2020.00184/fullTest; https://doaj.org/toc/2296-8016Test

الوصول الحر: https://doaj.org/article/a18fda11153a41cb9b263acedc2cef10Test

المؤلفون: Megha A. Deshmukh, Gajanan A. Bodkhe, Sumedh Shirsat, Arunas Ramanavicius, Mahendra D. Shirsat

المصدر: Frontiers in Chemistry, Vol 6 (2018)

مصطلحات موضوعية: ethylenediaminetetraacetic acid (EDTA), nanocomposite, electrochemical detection, conducting polymer, single walled carbon nanotubes, Chemistry, QD1-999

الوصف: Heavy metal ions are considered as one of the major water pollutants, revealing health hazards as well as threat to the ecosystem. Therefore, investigation of most versatile materials for the sensitive and selective detection of heavy metal ions is need of the hour. Proposed work emphasizes the synthesis of conducting polymer and carbon nanotube nanocomposite modified with chelating ligand for the detection of heavy metal ions. Carbon nanotubes are having well known features such as tuneable conductivity, low density, good charge transport ability, and current carrying capacity. Conducting polymers are the most reliable materials for sensing applications due to their environmental stability and tuning of conductivity by doping and de-doping. Formation of nanocomposite of these two idealistic materials is advantageous over the individual material, which can help to tackle the individual limitations of these materials and can form versatile materials with ideal chemical and electrical properties. Chelating ligands are the most favorable materials due to their ability of complex formation with metal ions. The present work possesses a sensing platform based on conducting polymer and carbon nanotube nanocomposite, which is stable in various aqueous media and possess good charge transfer ability. Chelating ligands played an important role in the increased selectivity toward metal ions. Moreover, in present investigation Ethylenediaminetetraacetic acid (EDTA) functionalized polypyrrole (Ppy) and single walled carbon nanotubes (SWNTs) nanocomposite was successfully synthesized by electrochemical method on stainless steel electrode (SSE). The electrochemical detection of Pb(II) ions using EDTA-Ppy/SWNTs nanocomposite was done from aqueous media. Cyclic voltammetry technique was utilized for the electrochemical synthesis of Ppy/SWNTs nanocomposite. Ppy/SWNTs nanocomposite was further modified with EDTA using dip coating technique at room temperature. The EDTA-Ppy/SWNTs modified stainless steel electrode (SSE) exhibited good sensitivity and selectivity toward heavy metal ions [Pb(II)]. Detection limit achieved for Pb(II) ions was 0.07 μM.

وصف الملف: electronic resource

العلاقة: https://www.frontiersin.org/article/10.3389/fchem.2018.00451/fullTest; https://doaj.org/toc/2296-2646Test

الوصول الحر: https://doaj.org/article/10a5d5e0f6b0442baab5f6bafa10acfaTest

المؤلفون: Chenhao Cong, Siva Subramanian, Gajanan A. Bodkhe, Guangwei Wang, Zhijun Li, Rixuan Wang, Xinlin Li, Myunghee Kim, Se Hyun Kim

مصطلحات موضوعية: Biotechnology, Space Science, Chemical Sciences not elsewhere classified, Information Systems not elsewhere classified, simple mechanical stirring, polymer embedding method, linear detection range, flavin adenine dinucleotide, demonstrates good repeatability, create intricate patterns, concentric circle structure, accurate human detection, 42 μa mm, multiwall carbon nanotubes, electrode system patch, 3d printer equipped, time glucose monitoring, time monitoring, 3d carbon, working electrode, glucose sensors, glucose sensor, glucose dehydrogenase, viscosity ink, rising prevalence, preparing graphite, practical production, pose limitations, novel approach, invasive sensors

الوصف: The rising prevalence of diabetes has led to an increased focus on real-time glucose monitoring. Wearable glucose sensor patches allow noninvasive, real-time monitoring, reducing patient discomfort compared to invasive sensors. However, most existing glucose sensor patches rely on complex and contaminating metal vapor deposition technologies, which pose limitations in practical production. In this study, we propose a novel approach for preparing graphite/multiwall carbon nanotubes (MWCNT)/reduced graphene oxide (rGO) using a high-viscosity ink, which can be easily obtained through simple mechanical stirring. To create intricate patterns and enable printing on curved substrates, we employed a 3D printer equipped with an infrared laser ranging system. The ink served as a working electrode, and we developed a three-electrode system patch with a concentric circle structure. Subsequently, the working electrode underwent enzymatic modification with glucose dehydrogenase with flavin adenine dinucleotide (GDH-FAD) using a polymer embedding method. The resulting wearable glucose sensor exhibited a sensitivity of 2.42 μA mM –1 and a linear detection range of 1–12 mM. In addition, the glucose sensor has excellent anti-interference capability and demonstrates good repeatability in simulated real human wear scenarios, which meets the requirements for accurate human detection. These findings provide valuable insights into the development of human health monitoring technologies.

العلاقة: https://figshare.com/articles/journal_contribution/3D_Carbon-Based_Conductive_Network_Printed_for_Glucose_Sensors_on_Curved_and_Flexible_Substrates/25124243Test

الإتاحة: https://doi.org/10.1021/acsami.3c14757.s001Test
https://figshare.com/articles/journal_contribution/3D_Carbon-Based_Conductive_Network_Printed_for_Glucose_Sensors_on_Curved_and_Flexible_Substrates/25124243Test

المؤلفون: Subramanian Siva, Gajanan A. Bodkhe, Chenhao Cong, Se Hyun Kim, Myunghee Kim

المصدر: Journal of Industrial and Engineering Chemistry. 124:523-531

مصطلحات موضوعية: General Chemical Engineering

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::21198ccad0d2593f508f725b9d98a655Test
https://doi.org/10.1016/j.jiec.2023.05.007Test

المؤلفون: Megha A. Deshmukh, Sang-Joon Park, Hanuman N. Thorat, Gajanan A. Bodkhe, Arunas Ramanavicius, Simonas Ramanavicius, Mahendra D. Shirsat, Tae-Jun Ha

المصدر: Journal of Industrial and Engineering Chemistry. 119:90-111

مصطلحات موضوعية: General Chemical Engineering

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::8e6ba2a21cf3cca38e167017e653ab47Test
https://doi.org/10.1016/j.jiec.2022.11.054Test

المؤلفون: Gajanan A. Bodkhe, Dhanashri D. Khandagale, Mayuri S. More, Megha A. Deshmukh, Nikesh N. Ingle, Pasha W. Sayyad, Manasi M. Mahadik, Sumedh M. Shirsat, M.S. Al-Buriahi, Meng-Lin Tsai, Myunghee Kim, Mahendra D. Shirsat

المصدر: Ceramics International. 49:6772-6779

مصطلحات موضوعية: Process Chemistry and Technology, Materials Chemistry, Ceramics and Composites, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::58300b83ec8ed4f5d86c53b1fa3cbfafTest
https://doi.org/10.1016/j.ceramint.2022.10.135Test

المؤلفون: Theeazen Al‐Gahouari, Gajanan A. Bodkhe, Pasha W. Sayyad, Nikesh N. Ingle, Manasi M. Mahadik, Sumedh M. Shirsat, Megha A. Deshmukh, Nadeem Musahwar, Mehendra Shirsat

مصطلحات موضوعية: Electrochemical Detection of Heavy Metal Ions, Electrochemistry, Chemistry, Physical Sciences, Electrochemical Biosensor Technology, Electrical and Electronic Engineering, FOS Electrical engineering, electronic engineering, information engineering, Engineering, Conducting Polymer Research, Polymers and Plastics, Materials Science, Graphene-Based Sensors, Electrochemical Sensors, Detection, Scanning Electrochemical Microscopy, Electrochemical Biosensors, Graphene, Nanocomposite, Materials science, Cyclic voltammetry, Carbon nanotube, Oxide, Electrochemical gas sensor, Raman spectroscopy, Differential pulse voltammetry, Nuclear chemistry, Inorganic chemistry, Chemical engineering, FOS Chemical engineering, Electrode

الوصف: The selectivity improvement of Electrochemically reduced Graphene Oxide–Multiwalled Carbon Nanotubes–L-cysteine (ErGO–MWNTs–L-cys) nanocomposite modified Glassy Carbon Electrode (GCE) using drop casting method for electrochemical detection of lead (Pb2+) ions was investigated. Initially, the graphene oxide–Multiwalled Carbon Nanotubes–L-cysteine (GO–MWNTs–L-cys) nanocomposite was synthesized by a facile and cost-effective method at room temperature. The as-prepared, GO–MWNTs–L-cys exhibited good stable aqueous dispersions due to high hydrophilic nature of GO components which led to inhibiting the hydrophobicity of MWNTs. Then, the electrochemical conductivity of ErGO–MWNTs–L-cys nanocomposite modified GCE (ErGO–MWNTs–L-cys/GCE) was improved by the direct electrochemical reduction of GO–MWNTs–L-cys nanocomposite. The GO–MWNTs–L-cys nanocomposites and its individual components were characterized by Attenuated Total Reflection Infrared (ATR-IR), Raman spectroscopy, Atomic Force Microscopy and X-ray diffraction ... : تم فحص التحسن الانتقائي لأنابيب الكربون النانوية متعددة الجدران المخفضة كيميائيًا من أكسيد الجرافين - L - السيستين (ErGO - MWNTs - L - cys) المعدلة بمركبات النانو من قطب الكربون الزجاجي (GCE) باستخدام طريقة الصب الساقط للكشف الكهروكيميائي عن أيونات الرصاص (Pb2 +). في البداية، تم تصنيع المركب النانوي لأكسيد الجرافين - الأنابيب النانوية الكربونية متعددة الجدران - L - السيستين (GO - MWNTs - L - cys) بطريقة سهلة وفعالة من حيث التكلفة في درجة حرارة الغرفة. أظهرت GO - MWNTs - L - cys كما تم إعدادها تشتتًا مائيًا مستقرًا جيدًا بسبب الطبيعة الآلفة للماء العالية لمكونات GO مما أدى إلى تثبيط كراهية الماء لـ MWNTs. بعد ذلك، تم تحسين الموصلية الكهروكيميائية للمركب النانوي ErGO - MWNTs - L - cys المعدل GCE (ErGO - MWNTs - L - cys/GCE) من خلال الاختزال الكهروكيميائي المباشر للمركب النانوي GO - MWNTs - L - cys. تميزت المركبات النانوية GO - MWNTs - L - cys ومكوناتها الفردية بالأشعة تحت الحمراء الموهنة للانعكاس الكلي (ATR - IR)، ومطيافية رامان، ومجهر القوة الذرية، وانحراف الأشعة السينية (XRD). تم تأكيد التأثير التآزري للمركب ...

العلاقة: https://dx.doi.org/10.60692/acrch-y1077Test

الإتاحة: https://doi.org/10.60692/yjys7-xsc4010.60692/acrch-y1077Test