Op Gupta Chemical Engineering Latest Edition

[Idara Viengxay]

DrAmita Gupta is the Deputy Director of the Johns Hopkins Center for Clinical Global Health Education, and Associate Professor of Infectious Diseases at the John Hopkins School of Medicine, with a joint appointment in International Health at the John Hopkins Bloomberg School of Public Health.

Dr. Sujata Bhatia is a professional engineer, physician, and Professor of Chemical and Biomolecular Engineering at the University of Delaware, where she focuses on teaching engineering analysis as a means toward solving human health issues.

In this episode of the Doing a World of Good podcast, you'll meet Nance Dicciani, Ruby Chandy, Kim Ann Mink, and Suzanne Rowland, women who have contributed to the advancement of both chemical engineering and the business world. Listen on the Giving site or subscribe in iTunes.

Gaurav Gupta is Lecturer in Chemical Engineering at Lancaster University. His research interests involve electrochemical engineering, catalyst development for energy storage and generation systems (Electrolysis, Fuel cells). After graduating with a degree in Metallurgical and Materials Engineering from National Institute of Technology Rourkela, India in 2007, He went on to do a Masters in Materials and Metallurgical Engineering from Indian Institute of Technology Kanpur, India where he developed his interests in electrochemistry and materials development. He was offered a College of Engineering and Physical Sciences Scholarship to do a PhD (2010-2014) on development of Bimetallic Pt-Cr electrocatalysts for PEMFCs from the University of Birmingham (working with Professor Paula M Mendes and Dr Surbhi Sharma). He joined as a post-doctoral researcher in 2015 on an Innovate UK project at Imperial College London on the development of low-cost proton exchange membrane fuel cells in partnership with Warwick Manufacturing Group (WMG), Arcola Energy, Lohmann Technologies, 4th Energy Wave. In 2016, he joined Newcastle University as a research associate where he worked on various projects related to Alkaline Fuel Cells, Alkaline electrolysers, Catalysis.

Rajeev received his B.S. in materials and metallurgical engineering from the Indian Institute of Technology Kanpur, India and Ph.D. in materials engineering from Monash University, Australia. Prior to joining the NC State University faculty, he was an assistant professor of chemical, biomolecular and corrosion engineering at the University of Akron, Ohio.

At the onset of the COVID-19 pandemic, Gloria Oporto, associate professor of wood science and technology, had researched woody biomass for food packaging and pharmacy novel applications. Woody biomass are timber-derived products that can be converted to energy through combustion or gasification.

With the aid of a National Science Foundation RAPID award for nearly $200,000, Oporto, Gupta and their team will develop and test antimicrobial, renewable mask biofilters constructed of composite biomaterials.

RAPID grants are awarded to researchers tackling quick-response projects supporting severe or urgent situations. RAPID awards have been granted to other University researchers already confronting the COVID-19 crisis.

According to Oporto, the three key components of the mask filters are: polylactic acid, a biodegradable plastic derived from agricultural and renewable resources; nanocellulose, a nontoxic, lightweight substance produced from wood pulp; and nano copper, which contains antimicrobial properties.

Developed filters will be tested to demonstrate that they have all the properties required for masks to be worn by medical personnel. If the research is successful, it will result in the development of a reusable medical mask that is superior than the single-use mask that is currently in use.

Another objective to the project is to promote collaborations across different fields such as wood science, health science, engineering, chemistry and biology which, in turn, will support training and education of students in these fields.

Members of the team include Jonathan Boyd, orthopaedics; Sushant Agarwal, chemical engineering; Rosaysela Santos, pathology, anatomy and laboratory medicine; and Edward Sabolsky, mechanical and aerospace engineering.

Dr. Gupta joined Pittsburg State University in the spring of 2013. Before joining Pittsburg State University, he worked as an Assistant Research Professor at Missouri State University, Springfield, MO, then as a Senior Research Scientist at North Carolina A&T State University, Greensboro, NC. Dr. Gupta is serving as an Associate Editor and reviewer for several leading science journals. His research focus is in green energy production and storage using nanomaterials, optoelectronics and photovoltaics devices, organic-inorganic hetero-junctions for sensors, nanomagnetism, conducting polymers and composites as well as bio-based polymers, bio-compatible nanofibers for tissue regeneration, scaffold and antibacterial applications and bio-degradable metallic implants. Dr. Gupta has received a number of research grants (over one million dollars) from federal and state agencies such as National Science Foundation (NSF), NSF-Experimental Program to Stimulate Competitive Research (EPSCoR), Department of Energy (DoE), Kansas IDeA Network of Biomedical Research Excellence (K-INBRE), State of Kansas Polymer Chemistry Initiative, etc.

The VersaStat 4 utilize high-speed digital to analog converter circuitry, providing instantaneous step changes and pulses to generate the most complex potentiostatic / galvanostatic waveforms. Three high-speed, (500k samples / second) analog to digital converters provide fully synchronized measurements of the cell voltage, cell current and auxiliary voltage input.

The units provide 4-terminal cell connections, which allows great flexibility for the analysis of both high and low impedance cells. In low impedance applications, errors due to cell connection cable impedance may adversely affect the accuracy of results. The use of 4-terminal connections, allows the cell voltage to be measured at the cell terminals, minimizing errors due to cable impedance. The VersaStat 4 provide an optional built-in frequency response analyzer (FRA) that is able to characterize a wide range of electrochemical cells. The FRA is fully integrated into the system allowing high speed switching between DC and EIS measurements.

The Model 4200-SCS is a total system solution for electrical characterization of devices, materials and semiconductor processes. This advanced parameter analyzer provides intuitive and sophisticated capabilities for semiconductor device characterization by combining unprecedented measurement sensitivity and accuracy with an embedded Windows-based operating system and the Keithley Interactive Test Environment. It is a powerful single box solution. To get a complete picture of any device or material, three fundamental electrical measurement techniques are required. The Model 4200-SCS offers all three.

The 66997 Research Series QTH Source includes a lamp housing for QTH lamps, a 69931 Radiometric Power Supply, and 250 W QTH lamp. The lamp housing provides a temperature controlled environment to run the lamp efficiently and holds the condensing optics and rear reflector to collect the lamp radiation. You can power the supply on and off, set the current/power preset and limit, and monitor the current, voltage, power, and operating hours.

The Sorvall centrifuge is designed for maximum productivity and high speed up to 15,000 rpm. Class leading acceleration and deceleration rates deliver additional time savings. This is engineered for maximum sample protection. Unlike other centrifuges that require high-maintenance vacuum systems to achieve speed, the Sorvall spins samples at atmospheric pressure, without the need for a vacuum. This superior design minimizes maintenance and helps prevent sample leakage, rotor imbalance and run shut-downs.

In house developed electrospun system provide full control over wide range of potential. This instrument can produce nano-fibers of polymer for various applications such as non-woven cloth, scaffold and biomedical. This technique can produce fibers with high mechanical strength for defense applications. These nanofibers could have amazing characteristics such as very large surface area-to-volume ratio and high porosity with very small pore size and therefore can be also used for many biomedical applications.

Renewable energy, such as solar, offers major opportunities for satisfying increasing demands for energy by the rapid industrial development and fast growing human population. The challenge for effective use of renewable energy is in the development of high-performance, low-cost, environmentally friendly conversion and storage systems. For this, dye-sensitized solar cells (DSSCs) based on titanium oxide (TiO2) offer a very promising opportunity due to their multiple advantages, such as low cost, light weight, long life and relative ease of tailoring properties. However, their efficiency is still limited by low absorption coefficients, inefficiency of electron transfer and lack of organic materials with suitable bandgap.

The objective of the research project is to improve the efficiency of the solar cell by incorpotation of graphene. We select the dye from red-cabbage because it is cheap, environmentally friendly and very efficient. Its cost/performance coefficient (conversion efficiency/cost of dye) when used in a solar cell should be much higher than that of the corresponding traditional synthetic ruthenium dye. We have investigated the effect of graphene on the efficiency of the solar cells. The high conductivity, high specific surface area, high stability and light weight makes graphene very suitable for these applications.

The effect of light intensity on the solar efficiency of the TiO2/graphene/cabbage dye solar cell was investigated. It was observed that the efficiency of the DSSC increases with increasing the light intensity e.g. the efficiency of the solar cell increases from 0.013% to 0.150% by increase in light intensity from 30 to 100 mW/cm2, respectively. The solar efficiency of the natural dye used in this research was compared with commercial dye (N 719) under similar experimental conditions and observed that the natural (purple cabbage) dye has higher efficiency (0.150%) than N 719 (0.078). It was further evaluated that the efficiency of the fabricated solar cell could improve by incorporating graphene oxide. The efficiency of the TiO2 dye-sensitized solar cell was found to increase from 0.150% to 0.361% by incorporating graphene oxide into purple cabbage dye.

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