Article
Chemistry, Physical
Lin Zhu, Jinlong Fan, Hui Huang, Lei Guo, Mengyue Zhu, Xingwen Zheng, Ime Bassey Obot
Summary: The ethanol extract of bamboo shoots was obtained and separated into different solvent extraction fractions, which were then investigated for their inhibitive effect on mild steel corrosion in sulfuric acid solution through various techniques. The results showed that the inhibition efficiency of the extraction fractions varied, with dichloromethane and ethyl acetate fractions experiencing a decrease in efficiency over time, while the n-butanol fraction maintained a stable inhibition efficiency, showing a better long-term effect. Surface analysis technology revealed that the adsorption of the extraction fractions on mild steel surface followed the Langmuir isotherm equation.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Physical
Shveta Sharma, Richika Ganjoo, Sourav Kr. Saha, Namhyun Kang, Abhinay Thakur, Humira Assad, Ashish Kumar
Summary: This study evaluated the corrosion retardation of mild steel using Betahistine dihydrochloride drug as a sustainable inhibitor in HCl solution. Various techniques were used to understand the inhibition process and the results showed that the drug had a high inhibition efficiency under optimized conditions.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Bi-lan Lin, Jun-jie Shao, Yu-ye Xu, Yi-ming Lai, Zhong-ning Zhao
Summary: Pomelo peel extract (PPE) is evaluated as a green and renewable corrosion inhibitor for mild steel in 1.0 mol/L H3PO4 solution, exhibiting good inhibition efficiency and functioning as a mixed inhibitor. The adsorption of PPE on mild steel follows Langmuir, El-Awady and Temkin isotherms, with physical adsorption dominating at room temperature or higher PPE concentrations.
ARABIAN JOURNAL OF CHEMISTRY
(2021)
Review
Engineering, Chemical
G. K. Shamnamol, Jaya Mary Jacob, P. Rugma, Anoop J. R. Raj
Summary: The mixture of plant extract and salt can synergistically enhance corrosion inhibition, reducing the amount of plant extract required. Halogen and zinc ion based salts have been reported to have an effective synergistic effect on the inhibitive action of plant extract.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
W. L. Xu, X. Wang, G. A. Zhang
Summary: In this study, two novel pyrimidine derivatives, BMPO and BBMP, were synthesized and used as eco-friendly corrosion inhibitors for mild steel in HCl medium. The experimental results showed that both BMPO and BBMP exhibited excellent corrosion inhibition properties with high efficiency and stability. Theoretical calculations revealed that the adsorption of BMPO and BBMP on the steel surface was achieved through the bonding of N, S, O atoms and the benzene ring, and protonation further promoted their adsorption. BBMP, with more benzyl groups, formed a hydrophobic film with better coverage, leading to superior corrosion inhibition effect.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Review
Green & Sustainable Science & Technology
Rasaq O. Medupin, Kingsley O. Ukoba, Kelvin O. Yoro, Tien -Chien Jen
Summary: This study focuses on the sustainability of plant-based corrosion inhibitors, considering the economic, safety, and environmental impacts. It discusses the existing issues and identifies the need for further research in developing sustainable technologies.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Electrochemistry
Beiyao Li, Wen Wang, Liping Chen, Xingwen Zheng, Min Gong, Jinlong Fan, Liqing Tang, Qingxiu Shi, Guanyu Zhu
Summary: The corrosion inhibition performance of Magnolia grandiflora leaves extract (MGLE) on mild steel in 0.5 M H2SO4 solution was studied. The results showed that MGLE acted as a mixed corrosion inhibitor with predominantly cathodic inhibition. It effectively inhibited the corrosion of mild steel in the solution, with a maximum corrosion inhibition efficiency of 91%. The corrosion inhibition performance of MGLE was enhanced with increasing concentration and weakened with rising temperature.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2023)
Article
Chemistry, Physical
Hadariah Bahron, Aliyin Abdul Ghani, El Hassane Anouar, Zaidi Embong, Abdulrahman Alharthi, Mohamad Kamal Harun, Yatimah Alias
Summary: The corrosion efficiency of three imines on mild steel in strong acid was investigated, with TANO demonstrating the highest inhibition efficiency at a specific concentration, attributed to chemical adsorption. XPS analysis revealed that C-O and C-N molecules in TANO were the main contributing factors to its high inhibition efficiency.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Physical
A. Sowmyashree, Amita Somya, Sandeep Kumar, Srilatha Rao, Gururaj Kudur Jayaprakash
Summary: This report discusses the application of a room temperature anthraquinone-based liquid crystal as a corrosion inhibitor and emphasizes the importance of mesogenic organization in inhibiting corrosion. The experimental results are in line with the findings from quantum studies.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Min Tang, Xianghong Li, Shuduan Deng, Ran Lei
Summary: The study found a strong synergistic inhibition effect between MME and KI on cold rolled steel in acidic solution, with a maximum inhibition efficiency of 94.4%. The presence of MME/KI mixture significantly enhances the corrosion inhibition of CRS, showing a clear synergistic effect.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Environmental Sciences
J. Aslam, M. Mobin, Huda, A. Aslam, R. Aslam
Summary: This study investigated the phytochemical constitute of Eucalyptus bark extract and its application in inhibiting corrosion of mild steel in 5% HCl solution. The results showed that Eucalyptus extract exhibited high corrosion inhibition efficiency in 5% HCl and the adsorption was spontaneous and mixed type.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ghada S. Masaret, Badriah A. Al Jahdaly
Summary: The target pyrrolyl-thiazoldin-4-one inhibitor (PEHT) was synthesized and evaluated for its corrosion inhibition properties on mild steel in acidic solution. PEHT showed maximum protection efficiency at a concentration of 8 x 10(4) M and adsorbed on the metal surface chemically, forming a protective film as deduced from EIS data. The inhibitor acted as a mixed-type inhibitor according to potentiodynamic polarization measurements.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Biochemistry & Molecular Biology
Nayeli Monterrosas-Brisson, Mayra Zagal-Guzman, Alejandro Zamilpa, Enrique Jimenez-Ferrer, Margarita Aviles-Flores, Macrina Fuentes-Mata, Maribel Herrera-Ruiz
Summary: The study found that the extract and fraction from Argemone mexicana L. have potential anti-inflammatory activity in acute inflammation and neuroinflammation, with AmAcOEt and AmF-3 showing more significant inhibitory effects, reducing inflammation edema and spleen enlargement.
CHEMISTRY & BIODIVERSITY
(2021)
Article
Green & Sustainable Science & Technology
Qihui Wang, Chongkang Zhao, Qi Zhang, Xing Zhou, Zhitao Yan, Yi Sun, Da Sun, Xueming Li
Summary: This study utilized Benincasa hispida peel to prepare Benincasa hispida peel extract (BHPE) through hot water extraction and freeze-drying processes. The synergistic effect of BHPE and KI on corrosion inhibition of mild steel in 1M HCl was investigated. The compositional analysis showed that BHPE mainly consisted of a mixture of sugars, which possessed a high density of hydroxyl groups and unsaturated functional groups, indicating effective corrosion inhibition properties. Electrochemical experiments and surface analysis revealed that the BHPE and KI composite effectively protected mild steel. Moreover, the synergistic coefficient between BHPE and KI was greater than 1 under various concentration conditions, and the highest corrosion inhibition efficiency reached 94.4%. Additionally, the corrosion inhibition mechanism of BHPE was thoroughly investigated using quantum chemistry (QC) and molecular dynamics simulation (MDS).
Article
Metallurgy & Metallurgical Engineering
Zohreh Gaikani, Hamid Khanmohammadi, Hossein Hassannejad
Summary: Two azole-based Schiff bases, TIB and BTP, are synthesized as inhibitors for mild steel in acidic medium. The inhibitive effect is studied using weight loss, potentiodynamic polarization, and electrochemical impedance measurements. The maximum inhibition efficiencies of TIB and BTP are approximately 83% and 81%, respectively, and they behave as mixed-type inhibitors. The protective layer formed on the metal surface is confirmed through SEM, EDX, and atomic force microscopic study.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Electrochemistry
Shweta Pal, Subhajit Jana, Ashish Kumar, Rajpal, Rajiv Prakash
Summary: In this study, Co3O4 nanoparticles embedded in N/S/Zn-doped porous carbon matrices were synthesized and used to modify commercial glassy carbon electrodes for enhanced and highly stable oxygen evolution reaction. The presence of increased oxygen vacancies, heteroatoms (N and S), and Zn significantly enhanced the catalytic activity and stability of the materials.
ELECTROCHIMICA ACTA
(2022)
Article
Energy & Fuels
Ajay Kumar, Saurabh Kumar, Subhajit Jana, Rajpal, Rajiv Prakash
Summary: In this study, a highly active polypyrrole/Na3Fe2(SO4)(2)(PO4) nanocomposite was synthesized for efficient hydrogen evolution reaction. The nanocomposite showed excellent HER activity, stability, and durability in highly acidic medium.
Article
Energy & Fuels
Saurabh Kumar, Mahatim Singh, Rakesh Mondal, Mridul Kumar, Rajiv Prakash, Preetam Singh
Summary: Due to the limited reserve and increasing price of lithium, alternatives to Li-ion batteries are rapidly growing. This study proposes a reversible sodium-ion battery cathode material made of 3D framework-structured molybdenum polyanionic phosphate (Mo2P2O11). The material exhibits reversible intercalation and stable charge storage performance, opening up a new route for the development of sodium-ion batteries.
Article
Engineering, Electrical & Electronic
Ankit Verma, V. N. Mishra, Rajiv Prakash
Summary: This article presents a highly selective and responsive hydrogen sulfide (H2S) gas sensor operated at room temperature (25 degrees C), which is based on a poly(3-hexylthiophene-2,5-diyl) (P3HT)/graphene quantum dot (GQD) nanocomposite as the sensing surface. The GQD, with an average size of about 2 nm, is distributed randomly on the P3HT film, leading to an enhanced charge transfer mechanism and surface area/volume (S/V) ratio. The sensing film is developed through a solution-processed floating-film transfer (FTM) method on a SiO2-coated p(++) Si substrate, and its sensing performance is investigated with varying H2S gas concentrations from 0 to 25 ppm. The P3HT/GQD-based organic thin-film transistor (OTFT) shows better sensing responses compared to the pristine P3HT-based OTFT, with a sensing response of approximately 91% at 25 ppm.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Ankit Verma, V. N. Mishra, Rajiv Prakash
Summary: A self-assembled, fully solution-processed bilayer (TiO2/HfO2) dielectric-based thin film transistor (TFT) was fabricated for highly sensitive ammonia gas detection at room temperature. The bilayer dielectric film, grown over a boron-doped silicon substrate, exhibited high areal capacitance, low roughness, low leakage current density, and a high dielectric constant, which are favorable for high-performance organic TFTs. The incorporation of a TiO2 layer improved the capacitance and reduced roughness of the bilayer dielectric film, enhancing the charge transfer mechanism. The developed high-k bilayer solution-processed dielectric layer was successfully used to develop a low voltage operated OTFT for ammonia gas detection, showing a rapid response and high sensing response.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Energy & Fuels
Mahatim Singh, Saurabh Kumar, Rakesh Mondal, Preetam Singh, Rajiv Prakash, Neeraj Sharma
Summary: A novel electrode material consisting of polyanionic-type (PO4)n- polyhedral covalently bonded with Ni-O linkage is proposed for intercalative battery-type hybrid supercapacitors. A highly porous, flake-type KNiPO4 electrode exhibits robust electrochemical performances due to its open framework structure and active participation of the Ni2+/3+ redox couple, allowing for superior pseudocapacitive intercalating charge storage in aqueous KOH electrolyte. In full cell hybrid supercapacitor mode, the KNiPO4 electrode demonstrated high energy density and power density, as well as excellent cyclic stability, making it suitable for various applications including biomedical devices and bulk, grid-level charge storage.
Article
Energy & Fuels
Ajay Kumar, Saurabh Kumar, Subhajit Jana, Rajiv Prakash
Summary: A nanocomposite of polypyrrole and Ni-doped NASICON-structured Na3NixFe(2-x)(PO4)(SO4)2 has been synthesized using a simple chemical oxidative polymerization method, exhibiting remarkable hydrogen evolution reaction activity. The nanocomposite shows comparable catalytic performance to polymer-based catalysts and offers high current density at lower overpotential, along with exceptional environmental and catalytic stability.
Article
Engineering, Electrical & Electronic
Prashant Kumar, Vishwambahar Nath Mishra, Rajiv Prakash
Summary: This study reports water-induced Lithium oxide (LiOx) based Organic field effect transistors with operating voltage under -2 V, which utilize the floating film transfer method and a self-assembled poly [2,5-(2-octyldodecyl)-3,6-diketopyrrolopyrrole-alt-5,5-(2,5-di(thien-2-yl)thieno [3,2-b]-thiophene)] (DPP-DTT) semiconducting layer. The devices exhibit good performance, including high saturation mobility, low threshold voltage, and low subthreshold swing. The synthesis process is low cost and eco-friendly, using deionized water as the precursor solution of lithium oxide without toxic additives. The LiOx based dielectric also shows good characteristics, such as low leakage current and high capacitance.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Prashant Kuamr, Vishwambhar Nath Mishra, Rajiv Prakash
Summary: We have developed a highly sensitive and selective room temperature operated NO2 gas sensor based on DPP-DTT OFETs. By using water-induced AlOx as the gate dielectric and FTM with water as a liquid substrate, we achieved a response of 2217.4% for 200 ppb and 8445.5% for 1.4 ppm of NO2. The sensor also showed a response and recovery time of 34 and 168 s for 1.4 ppm NO2, with a maximum temperature during fabrication process below 260 degrees C. Selectivity study with other gases confirmed the high selectivity of the sensor for NO2.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Ankit Verma, Shipra Gupta, V. N. Mishra, Rajiv Prakash
Summary: This study focuses on the fabrication and characterization of a low-voltage, flexible organic thin film transistor (OTFT) for ammonia sensing. The device utilizes a hybrid dielectric layer and a polymer/2-D nanocomposite as the gate oxide and active layer respectively. The results show that the fabricated device has good electrical characteristics and can detect ammonia gas at low concentrations.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Engineering, Electrical & Electronic
Ankit Verma, Dharmendra Kumar, V. N. Mishra, Rajiv Prakash
Summary: A low-cost floating film transfer method was used to fabricate a gold-doped poly(3-hexylthiophene-2,5diyl) (P3HT)-based low-voltage organic thin-film transistor (OTFT) for white light sensing. The fabrication process involved solution-processed spin casting for high-k dielectric growth and a floating film transfer method for metal nanoparticle-doped organic semiconductor growth. The resulting OTFT showed high crystallinity, self-assembly, and cost-efficiency compared to conventional film deposition techniques. The device exhibited high photosensitivity, photoresponsivity, and detectivity, as well as low response/recovery time, making it suitable for white light sensing applications.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Engineering, Electrical & Electronic
Prashant Kumar, Vishwambhar Nath Mishra, Rajiv Prakash
Summary: This article presents ultralow-voltage operable organic field effect transistors (OFETs) using a bilayer dielectric made of lithium oxide (LiOx) and aluminum oxide (AlOx). The use of water instead of toxic organic solvents for processing the dielectrics is demonstrated. A donor acceptor-based p-type polymer, poly[2,5-(2-octyldodecyl)-3, 6-diketopyrrolopyrrole-alt-5,5-(2,5di(thien-2-yl)thieno [3,2-b] -thiophene)] (DPP-DTT), is employed as the organic semiconducting layer. The OFET device shows good performance with a high ON/OFF ratio and operability under -1 V.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Chemistry, Physical
Aniruddha Jaiswal, Rajeev Kumar, Rajiv Prakash
Summary: In this study, a pyrolytically derived iron-based nonprecious metal catalyst, Fe3C embedded in heteroatom (S,N)-codoped carbon matrix, was investigated as a potential catalyst for oxygen reduction in alkaline media. The catalyst was carefully characterized for its structure, crystallite size, morphology, dopant bonding states, and defect levels. Optimization of reaction temperature and dopant amounts in the Fe3C@C nanostructures was carried out. Among the different variants, Fe3C@C-SN/25800 exhibited the best electrocatalytic activity with a positive onset potential and low half-wave potential. The presence of Fe-Nx and Nx-C active sites and the suitable alignment of heteroatoms in the carbon matrix contributed to the enhanced performance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shivam Rai, Gopal Ji
Summary: This study suggests that chloroform extract of mint leaves can be used as a coating material to lower the corrosion of copper. Adding synthesized NiO nanoparticles from mint leaves extract can enhance the anti-corrosion properties of the coating on copper.
NEW JOURNAL OF CHEMISTRY
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Rajul Sharma, Aniruddha Jaiswal, Vinit Kumar Jha, A. Ullas, Gopal Ji, Rajiv Prakash
Summary: Copper is widely used for its good thermal and electrical conductivity, but its properties can be diminished by corrosion. This research investigates the corrosion behavior of copper substrates coated with black leather dye (LBD) in 0.5 M NaCl solution, and suggests that LBD coating performs better in preventing corrosion compared to bare copper substrates based on various tests.
MATERIALS TODAY-PROCEEDINGS
(2022)