Sesha Srinivasan

Florida Polytechnic University · College of Innovation Technology

The use of technology in higher education science classrooms rose significantly in the advent of the COVID-19 pandemic. In many universities, academic programs including introductory physics classes were taken online. Some institutions adopted online learning but also maintained face-to-face (F2F) laboratories when COVID-19 restrictions began to ea...

This work investigates the effect of surfactant on the microencapsulation of thermochromic materials (TCMs) by TiO2. Three types of surfactants, namely Cetrimonium Bromide(CTAB), Sodium Dodecyl Benzene Sulphonate (SDBS), and Hexadecanol (HEXA) are deployed during the microemulsion process for the formation of a TiO2 shell layer on a commercial dyeT...

Thermochromism and thermochromic materials research and development are of great interest because of their importance in versatile applications with respect to energy-efficient building structures, textile industries, thermal or heat storage, antique maintenance processing and sensors. In general, thermochromic materials have been classified into f...

A significantly large amount of thermal energy is lost from or gained in buildings as a result of solar radiation. A comfortable temperature can be maintained by correctly designing and arranging a building’s windows and smart roof coatings. Single layer or multilayer thin film coatings, with spectrally desirable characteristics, are deposited on g...

Calcium magnesium carbonate, also known as dolomite, is dispersed throughout Florida as a constituent of phosphate-mined resources. The mineral is problematic in the phosphoric acid production of phosphate for agriculture and must be separated so that it does not negatively affect the process. This means that this natural resource has no beneficial...

Environmental nanotechnology is holding an immense position in modern days’ science and engineering. These advanced ‘nanomaterials’ are being utilized for diverse range of applications but with the ideology of saving environment. Environmental sector is being tackled with the aim of developing sensors for detecting, monitoring and analysing the tox...

We have investigated the complex metal hydrides involving light weight elements or compounds for the reversible hydrogen storage. The complex hydrides are prepared via an inexpensive solid state mechanochemical process under reactive atmosphere at ambient temperatures. The complex metal hydride, LiBH4 with different mole concentrations of ZnCl2 wer...

Electrospinning is an inexpensive and versatile technique for fabricating micro- and nano- scaled fibers. There have been limited attempts to employ it for the fabrication of thermochromic (TC) fibers, and the fabrication of a three-component (dye, developer, and solvent) TC material has required the use of a more complicated coaxial electrospinnin...

Dolomite, a calcium magnesium mineral (CaMg(CO 3) 2), is considered an undesirable accompanying mineral in the phosphoric acid production process and, as such, large quantities of this mineral are available in Florida. This study is aimed toward the characterization of the high-concentration phosphatic dolomite pebbles (handpicked dolomites) receiv...

In the field of energy storage, recently investigated nanocomposites show promise in terms of high hydrogen uptake and release with enhancement in the reaction kinetics. Among several, carbonaceous nanovariants like carbon nanotubes (CNTs), fullerenes, and graphitic nanofibers reveal reversible hydrogen sorption characteristics at 77 K, due to thei...

In recent years, due to the advancement in nanotechnology, advanced oxidation processes (AOPs), especially sonocatalysis and photocatalysis, have become a topic of interest for the elimination of pollutants from contaminated water. In the research work reported here, an attempt has been made to study and establish a physicochemical mechanism for th...

Ferrite-Ferroelectric composites with the generic formula y(Mn0.5Cu0.5Fe2O4)1 − y[Ca0.1Ba0.9Zr0.1Ti0.9] (y = 25%, 50% and 75%) are prepared by solid-state reaction. One of the prepared samples of the composites 25%Mn0.5Cu0.5Fe2O4–75%Ca0.1Ba0.9Zr0.1Ti0.9O3 (MCF-CBZT) is subjected to high-energy mechanical milling for different durations (12 h, 18 h...

Biosensors are emerging as efficient (sensitive and selective) and affordable analytical diagnostic tools for early-stage disease detection, as required for personalized health wellness management. Low-level detection of a targeted disease biomarker (pM level) has emerged extremely useful to evaluate the progression of disease under therapy. Such c...

Clean energy and fuel storage is often required for both stationary and automotive applications. Some of the clean energy and fuel storage technologies currently under extensive research and development are hydrogen storage, direct electric storage, mechanical energy storage, solar-thermal energy storage, electrochemical (batteries and supercapacit...

Metallovesicles are an emerging class of soft nanomaterials where spherical bilayer membranes, resulting from self-aggregation of amphiphilic metal complexes, amalgamate the advantages of metal specific catalytic properties and small hydrophobic cavities serving as nanoreactors. The confinement of substrates in these vesicle bilayers, on account of...

Plagiarism is an unfavorable act of claiming credit or ownership of someone else's ideas or unfair capture of other's work and claiming it as your own. Such actions and attitudes are very common since the existence of human life on our planet Earth. Academic morals that guarantee integrity which is indispensable to avoid any scientific or academic...

On the project based learning, the author of this abstract (instructor of the course) adopted “Bridge Design Competitions” based on his Statics “Engineering 3311” course. Students in a team of four or five are provided with accessories such as popsicle sticks and wood glue etc. to build their unique bridge design based on the concepts they learned...

This chapter discusses about metal hydride technologies for on-board reversible hydrogen storage applications. The metal hydrides such as intermetallic alloys and solid solutions have interstitial vacancies where atomic hydrogen is absorbed via an exothermic reaction; however, by endothermic path, the metal hydride desorbs the hydrogen reversibly a...

Call for full manuscript paper or review paper on ”Clean Energy and Fuel (Hydrogen) Storage for the upcoming special issue of Open Access journal - Applied Sciences.

Li-ion batteries are the key enabling technology in portable electronics applications, and such batteries are also getting a foothold in mobile platforms and stationary energy storage technologies recently. To accelerate the penetration of Li-ion batteries in these markets, safety, cost, cycle life, energy density and rate capability of the Li-ion...

LiNH2 and a pre-processed nanoMgH2 with 1:1 and 2:1 molar ratios were mechanochemically milled in a high-energy planetary ball mill under inert atmosphere, and at room temperature and atmospheric pressure. Based on the thermogravimetric analysis (TGA) experiments, 2LiNH2-nanoMgH2 demonstrated superior desorption characteristics when compared to the...

Special Issue - Applied Sciences Call for Papers

Energy carriers are a convenient form of stored energy. Electricity is one type of carrier that can be produced from various sources, transported over large distances, and distributed to the end user. Hydrogen is another type of energy carrier. If produced from clean sources, it constitutes a clean and versatile carrier. Liquid hydrogen is already...

Major challenges faced by connected intelligent vehicles, particularly autonomous vehicles, include complexity, dynamics, concurrency, timing, safety, security, and reliability. Among them, the complexity is the key factor for vehicle design. Cyber-physical systems (CPSs) are systems consisting of computational components and physical elements. In...

Nanomaterials enabled technologies have been seamlessly integrated into applications such as aviation and space, chemical industry, optics, solar hydrogen, fuel cell, batteries, sensors, power generation, aeronautic industry, building/construction industry, automotive engineering, consumer electronics, thermoelectric devices, pharmaceuticals, and c...

In this study, the synthesis of nonspherical composite particles of poly(ethylene glycol) diacrylate (PEG-DA)/SiO2 and PEGDA/ Al2O3 with single ormultiple vias and the corresponding inorganic particles of SiO2 and Al2O3 synthesized using the Stop Flow Lithography (SFL)method is reported. Precursor suspensions of PEG-DA, 2-hydroxy-2-methylpropiophen...

An issue in the application of nano-enabled products is how can we evaluate sustainable solutions to current sys-tem problems based on performance criteria? This work describes the application of an Input–Process–Output (IPO) model as a framework for a life-cycle analysis approach to identify performance metrics and criteria for evaluating the appl...

Over the past few years, the need for a clean and renewable fuel has sharply risen. This is due to increasing fossil fuel costs and the desire to limit or eliminate harmful by-products which are created during the burning of these fuels. Hydrogen is the most abundant element in the universe and can be used in either fuel cells or traditional intern...

We have developed state-of-the-art nanomaterials such as nanofibers, nanotubes, nanoparticles, nanocatalysts and nanostructures for clean energy, environmental and biomedical research. Energy can neither be created nor be destroyed, but it can be converted from one form to another. Based on this principle, chemical energy such as hydrogen has been...

The objective of this project is to create clean fuel for transportation using hydrogen powered by solar energy. Hydrogen has been generated by solar photovoltaic (PV) array and then collected for data analysis to demonstrate efficiency of the hydrogen production in all the steps of the experiment. The hydrogen produced from the electrolysis proces...

This study aims to understand the physicochemical characteristics of the 2010 British Petroleum (BP) oil spill soils and sediments such as oil contaminated soil, tarmat and tarball which have been collected from various locations in the Gulf of Mexico. This study also seeks to examine the level and type of oil contamination that affects the beach o...

The development of light weight hydrogen storage systems with high volumetric and gravimetric hydrogen densities is indeed essential for realizing the pollution free vehicular transportation [1]. Though, conventional metal hydrides possess the highest volumetric densities, their gravimetric capacities are rather low (<2wt.%). On the other hand, com...

A nitrogen rich, p-phenylenediamine based, porous aromatic framework (NPAF) with 1790 m2 g−1 BET surface area has been synthesized by using a Yamamoto coupling technique. The NPAF has shown a hydrogen uptake of 1.87 and 0.33 wt% at 77 K per 1 atm and 298 K per 80 bar, respectively. The CO2 uptake and selectivity of the NPAF at 273 K per 1 atm is 3....

In this study, the LiNH2-MgH2 (2:1.1) complex hydride system (Li-Mg-N-H is investigated in terms of hydrogen ab/desorption kinetics and the concomitant NH3 emission levels. By selecting more intense ball milling parameters, the hydrogen ab/desorption kinetics were improved and the NH3 emission reduced. However, it is shown that NH3 emission cannot...

The goal of this research was to quantify the degradation experienced by a polymer electrolyte fuel cell after storage at subzero temperatures ranging from 0 to -40 °C. The performance loss was determined by comparing the polarization and other applicable power curves before and after the subzero storage cycle. It was found that there are two disti...

The aim of the present investigation is to study the synergistic effects of multi-walled carbon nanotubes, Nb2O5 and other catalysts for reversible hydrogen storage characteristics of Ca(Li)-nMg-B-N-H systems. Multinary hydride using light weight, high capacity hydride compounds such as Ca(BH4)2, LiBH4, LiNH2, nanoMgH2 in 3:1:8:4 composition was sy...

In this study, novel light weight complex hydrides for reversible hydrogen storage are developed and synthesized. Metal hydrides are generally known to have a good hydrogen storage capacity but possess slow kinetics, irreversibility and high activation energy barriers. Therefore, metal hydrides often require very high temperature (>350°C) to releas...

The design of a volumetric measurement apparatus is studied by means of an uncertainty analysis to provide guidelines for optimum hydrogen sorption measurements. The reservoir volume should be as small as possible (i.e., 10 cc) to minimize the uncertainty. In addition, the sample mass loading has a profound effect on the uncertainty and the optimum...

Pristine complex quaternary hydride (LiBH 4 /2LiNH 2) and its destabilized counterpart (LiBH 4 /2LiNH 2 /nanoMgH 2) have recently shown promising reversible hydrogen storage capacity under moderate operating conditions. The destabilization of complex hydride via nanocrystalline MgH 2 apparently lowers the thermodynamic heat values and thus enhances...

a b s t r a c t High surface area physisorption materials are of interest for room temperature (RT) hydrogen storage enhancement by spillover. In this study, six different commercially available hypercrosslinked polystyrenes were screened considering the specific surface area, average pore size, pore volume, and adsorption enthalpy. MN270 was selec...

A ternary hydrogen storage system having a constant stoichiometric molar ratio of LiNH.sub.2:MgH.sub.2:LiBH.sub.4 of 2:1:1. It was found that the incorporation of MgH.sub.2 particles of approximately 10 nm to 20 nm exhibit a lower initial hydrogen release temperature of 150.degree. C. Furthermore, it is observed that the particle size of LiBNH quat...

One of the biggest challenges for the commercial application of existing hydrogen storage materials is to meet the desired high volumetric and gravimetric hydrogen storage capacity and the ability to refuel quickly and repetitively as a safe transportation system at moderate temperature and pressure. In this work, we have synthesized polyaniline na...

An optical cell is described for high-throughput backscattering Raman spectroscopic measurements of hydrogen storage materials at pressures up to 10 MPa and temperatures up to 823 K. High throughput is obtained by employing a 60 mm diameter × 9 mm thick sapphire window, with a corresponding 50 mm diameter unobstructed optical aperture. To reproduci...

In this study, we report the ability to split H2O into hydrogen at a reduced voltage by the influence of sulfur dioxide (SO2) and anode tolerance materials. This will improve the energy consumption for the production of hydrogen. Hydrogen is produced at the cathode while the anode electrode is bathed in sulfur dioxide and water to form sulfuric aci...

An innovative, nanostructured composite, anode electrocatalyst, material has been developed for the electrolytic splitting of (100%) H2S feed content gas operating at 135 kPa and 150 °C. A new class of anode electrocatalyst with general composition, RuO2–CoS2 has shown great stability and desired properties at typical operating conditions. This con...

Multinary complex hydrides comprised of borohydrides, amides and metal hydrides have been synthesized using the solid state mechano-chemical process. After the optimization of the system, it was found that LiBH4/LiNH2/MgH2 exhibits potential reversible hydrogen storage behavior (>6 wt.%) at temperatures of 125–175 °C. To further improve the hydroge...

In situ Raman spectroscopy was used to monitor the dehydrogenation of ball-milled mixtures of LiNH2–LiBH4–MgH2 nanoparticles. The as-milled powders were found to contain a mixture of Li4BN3H10 and Mg(NH2)2, with no evidence of residual LiNH2 or LiBH4. It was observed that the dehydrogenation of both of Li4BN3H10 and Mg(NH2)2 begins at 353 K. The Mg...

Due to its many physisorption sites as well as chemisorption sites, polyaniline (PANI) has been investigated for hydrogen storage purposes. The PANI was produced in house via traditional chemical synthesis methods and then electrospun to produce fibers. These PANI fibers were investigated and compared with standard bulk PANI and found to be stable...

This paper pursed one new cost effective strategy to improve the photocatalytic activity of the sol-gel developed Zn doped TiO2 by mechano-chemically milling in high energy planetary mill. The results showed that the photocatlytic activity was improved two times due to the increase of the surface area and the decrease in average crystallite size at...

In this study, a promising complex borohydride LiMn(BH4)3 was evaluated for on-board hydrogen storage. This new complex hydride was prepared from the precursor materials LiBH4 and MnCl2via the solid state mechano-chemical process. The B-H stretch occurrence at 2374 cm-1in addition to two other B-H bonding bands of LiBH4 (2228 and 2297 cm-1) from th...

This paper investigated an inexpensive way to improve the overall photocatalytic activity of TiO2 by N- doping using anhydrous ammonia as the nitrogen source. Doping amount could be further optimized by controlling the reaction time. Experiments showed that photocatalytic effect has one threshold concentration. Lower or higher reaction will decreas...

This paper pursed one new cost effective strategy to improve the photocatalytic activity of the sol-gel developed Zn doped TiO2 by mechano-chemically milling in high energy planetary mill. The results showed that the photocatlytic activity was improved two times due to the increase of the surface area and the decrease in average crystallite size at...

Conducting polyaniline nanofibers were synthesized using chemical templating method followed by electrospun process. These nanofibers have been compared with their standard bulk counterpart and found to be stable up to 150°C. Polyaniline nanofibers prepared by electrospun method reveal high hydrogen uptake of 10wt.% at around 100°C in the first abs...

Nanoparticles of Zinc Ferrite (ZnFe2 O4 ) prepared by both wet- and dry- high-energy ball milling (HEBM), have been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM), surface area and pore size distribution (BET) and wavelength-depende...

In this article, we investigate the ternary LiNH2–MgH2–LiBH4 hydrogen storage system by adopting various processing reaction pathways. The stoichiometric ratio of LiNH2:MgH2:LiBH4 is kept constant with a 2:1:1 molar ratio. All samples are prepared using solid-state mechano-chemical synthesis with a constant rotational speed, but with varying millin...

In this work, we report the synthesis and characterization of LiMn(BH4)3, member of a new class of complex borohydrides for hydrogen storage. This new complex hydride was prepared with a 3:1 ratio of precursor materials LiBH4 and MnCl2via the solid-state mechano-chemical process. The B–H stretch occurrence at 2374 cm−1 in addition to two other B–H...