Faculty Publications
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Publications by NITK Faculty
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Item Novel materials for energy translation and storage(Nova Science Publishers, Inc., 2024) Biswas, R.; Mal, S.S.; Mazumder, N.Novel materials have come a long way. With the advent of sophisticated fabrication and allied processes, it has become easier to make these novel materials for various applications. These materials have become part and parcel of making storage devices, supercapacitors, fuel cells etc. With the growing automobile as well as allied industrial sectors, the demand for novel materials has skyrocketed of late. As such, there has been a surge of extensive research and development in this sector. Although, there is no dearth of technical papers in this area; however, the absence of synchronized and well-organized content pertinent to this domain is duly felt. In this regard, this proposed book is a unique contribution to filling this gap. With the aim of assimilating theory and practices, this proposed book will endeavor to provide a comprehensive glimpse of recent advancements with a strong unification of theory and practices. The book's topics will encompass the principles of development, fabrication, functionalization, integration, and implementation of these materials. With a plethora of handpicked and well-organized content, this book is believed to cater to the needs of novices, researchers and practitioners. © 2024 by Nova Science Publishers, Inc. All rights reserved.Item Physicochemical characterization of microcrystalline cellulose extracted by sequential dual acid hydrolysis(Elsevier, 2024) Kalita, R.D.; Chakraborty, I.; Singh, P.; Banik, S.; Mal, S.S.; Zhuo, G.-Y.; Mazumder, N.Properties and applications of microcrystalline cellulose (MCC) differ based on its source and method of extraction. In this article, MCC was extracted from Saccharum spontaneum using single acid hydrolysis (MCC1) and sequential dual acid hydrolysis (MCC2). Scanning electron microscope (SEM) images exhibited that the dimension of MCC2 is much smaller compared to MCC1. X-ray diffraction (XRD) indicated that sequential dual acid hydrolysis results in decrease the crystallinity index (CI%) in case of MCC2 (34.45%). Fourier transform infrared spectroscopy (FTIR) spectra indicates the presence of characteristic bonds such as O–H stretching, C–H stretching, OH bending, and C–O–C stretching in both MCC1 and MCC2. Based on thermal analysis conducted using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), it was confirmed that MCC2 (275.0°C) melts at much lower temperature compared to MCC1 (342.04°C). MCC2 is also less thermally stable compared to MCC1 in terms of mass loss (%). In all, both MCC1 and MCC2 have different physicochemical properties based on the process of extraction and may have different applications. Based on their physicochemical characteristics, smaller MCC particles are known to be favored for wide variety of applications such as pharmaceutical excipients and impact factors such as tablet hardness, friability, and disintegration. © 2024 Elsevier Inc. All rights are reserved including those for text and data mining AI training and similar technologies.Item Impact of dietary advanced glycation end products (dAGEs) in processed foods on health(Elsevier, 2024) Kunnel, S.; Chakraborty, I.; Govindaraju, I.; Mal, S.S.; Mazumder, N.A correlation has been observed between increased consumption of processed food and the rise of various metabolic, neurological, and reproductive diseases. This can be attributed to the formation of dietary advanced glycation end products (dAGEs), which are known to be present in high concentrations in processed food items. This review primarily focuses on the factors affecting formation of AGEs present in processed food items and its role in the development of various diseases such as metabolic diseases, neurological disorders, infertility, and cancer have been presented here. © 2024 Elsevier Inc. All rights are reserved including those for text and data mining AI training and similar technologies.Item Organic-inorganic hybrid mixed-valent bisphosphonate-polyoxovanadates composites with activated carbon for energy storage applications(Nova Science Publishers, Inc., 2024) Madhusree, J.E.; Banerjee, A.; Mal, S.S.In this book, we discuss the investigation of two different bisphosphonate-functionalized polyoxovanadate compounds for use in electrochemical energy storage applications. The compounds are (NH4)4[H6(VIVO2)(VV2O5)2O3P-C(O)(CH2-2-C5NH4)-PO32].9H2O (m), and (NH4)4[H6(VIVO2)(VV2O5)2O3P-C(O)(CH2-3-C5NH4)-PO32]. 8H2O (n). They have a mixed-valent oxovanadate polyanionic assembly that has two different pyridyl functional groups present on the organic bisphosphonate ligand. Several techniques have been used to characterize composites made from these compounds with activated carbon, including Fourier transform infrared spectroscopy, P-XRD, FESEM, EDX, and surface adsorption-desorption tests. The electrochemical performance of acidic electrolytic solutions containing 0.1 M H2SO4, AC-m, and AC-n electrode materials was investigated. Although the compounds are isotypic mixed-valence polyoxovanadate structures, their electrical behavior varies based on the position of the pyridyl group. AC-n was reported to have the most prominent specific capacitance of 313 F g-1 at a current density of 1 A g-1 in a voltage window of 0-1 V, with exceptional energy and power densities of 43.56 Wh kg-1 and 1999.72 W kg-1, respectively. At the same time, AC-m exhibited a specific capacitance of 212 F g-1 and a specific energy of 29.45 Wh kg-1. By lighting up different LED lights with only 42 mg of carbon clothcoated sample, the composite AC-n electrode displayed exceptional specific power. A further benefit of AC-n nanohybrids is their ability to retain electrochemical performance over time, which suggests long-term stability. © 2024 Nova Science Publishers, Inc. All rights reserved.Item Straightforward synthesis of calcium levulinate from biomass-derived levulinic acid and calcium carbonate in egg-shells(Elsevier Ltd, 2019) Sharath, B.O.; Tiwari, R.; Mal, S.S.; Dutta, S.Calcium levulinate (CL) is a nutritional supplement for calcium and a chemical intermediate in synthesizing levulinic biofuels. The reported synthesis of CL involve reaction between cellulose-derived levulinic acid (LA) and calcium hydroxide in an aqueous medium. In this work, we report the production of CL using CaCO3 from poultry egg shells. The scalable production uses biomass-derived LA and egg-shell derived CaCO3 under conventional heating and mechanical stirring. The reaction was optimized on temperature, duration of reaction, and equivalent of CaCO3. Using 1.5 equivalent of CaCO3, the reaction completed within 2h at 50°C and afforded up to 97% isolated yield of CL as a crystalline solid. The reaction was also successfully carried out under mechanical grinding and scaled up to 20 g. The purity of the product was confirmed by melting point, FTIR, 1H-NMR and 13C-NMR spectroscopy. © 2019 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Conference on Advanced Materials, Energy & Environmental Sustainability, ICAMEES2018Item The hydrogen peroxide-mediated oxidation of biorenewable furfural to 2(5H)-furanone using heteropolyacids supported on ammonium y zeolite as the catalyst(Elsevier Ltd, 2020) Tiwari, R.; Bhat, N.S.; Mal, S.S.; Dutta, S.A series of heteropolyacid supported on ammonium Y zeolite (HPA-NH4YZ) catalysts were prepared and used for the catalytic oxidation of furfural to 2(5H)-furanone in aqueous hydrogen peroxide. The catalysts were characterized by PXRD, FTIR, TGA, and SEM analyses. The organic-solvent-free reaction was optimized on temperature, duration, loading of catalyst, and the equivalent of H2O2. The 20%PTA-NH4YZ catalyst showed the best catalytic activity giving 2(5H)-furanone in 40% isolated yield by solvent extraction under optimized conditions (20wt% cat., 100°C, 90min, 7.5eq. 30%H2O2). In addition, around 20% of succinic acid was recovered from the aqueous layer. © 2020 Elsevier Ltd. All rights reserved.Item High-yielding synthesis of alkyl stearates from stearic acid within a closed batch reactor using heteropolyacids as efficient and recyclable catalyst(American Institute of Physics Inc. subs@aip.org, 2020) Vinod, N.; Tiwari, R.; Bhat, N.S.; Mal, S.S.; Dutta, S.This study reports high-yielding and scalable synthesis of alkyl stearates from stearic acid (SA) within a closed batch reactor using commercially-available heteropolyacid catalysts. The reaction was carried out by using different commercially-available heteropolyacids and reaction conditions were optimized by using phosphotungstic acid (PTA) catalyst. The solvent-free, gram-scale reactions afforded alkyl stearates in excellent isolated yields (>95%) within 4?h at 110 °C using slight excess of alcohols and only 1?mol% of the phosphotungstic acid (PTA) catalyst. The PTA catalyst was successfully recovered and reused for five consecutive cycles without significant loss in mass or activity. © 2020 Author(s).Item Microscopic and spectroscopic characterization of elastomer for microfluidics application(Optica Publishing Group (formerly OSA), 2020) Banik, S.; Pooja, N.; Chakraborty, I.; Mal, S.S.; Mahato, K.K.; Srisungsitthisunti, P.; Mazumder, N.We have developed elastomers using potato and corn starch with various concentration and characterised them using microscopic and spectroscopic techniques. © OSA 2020 © 2020 The Author(s)Item Advanced Microscopic Visualization for Structural Characterization of Cellulose Extracted from Saccharum Spontaneum (Kohua Bon) of Assam, India(Optica Publishing Group (formerly OSA), 2021) Chakraborty, I.; Kalita, R.D.; Singh, P.; Banik, S.; Govindaraju, I.; Mal, S.S.; Zhuo, G.-Y.; Mahato, K.K.; Mazumder, N.Alpha, microcrystalline and nanocrystalline cellulose were sequentially extracted from stems and leaves of Saccharum spontaneum and were subjected to morphological and structural characterization using advanced microscopy techniques, including Scanning electron microscopy and nonlinear optical microscopy. © Optica Publishing Group 2021, © 2021 The Author (s)Item Morphological and Thermal Characterization of Starch-Based Elastomers(Optica Publishing Group (formerly OSA), 2021) Pooja, N.; Banik, S.; Chakraborty, I.; Mal, S.S.; Mahato, K.K.; Srisungsitthisunti, P.; Mazumder, N.Novel elastomers are synthesized from corn and potato starch with potential application in the fabrication of biodegradable microfluidic devices. The developed elastomers were subjected to morphological and thermal characterization. © Optica Publishing Group 2021, © 2021 The Author (s)