10 research outputs found
PVA Based Polymer Electrolyte with Layered Filler Graphite for Natural Dye Sensitized Solar Cell
Graphite nanopowder is synthesized by mechanical method using ball mill and used as filler in polymer electrolyte film based on Polyvinyl alcohol (PVA) for application in natural dye sensitized solar cell (DSSC). In the present work dye sensitized solar cell has been assembled using electrolyte system composed of PVA as host polymer, ethylene carbonate as plasticizer, LiI: I2 as redox couple and graphite as filler; TiO2 modified with Copper oxide (CuO) photoanode in order to provide inherent energy barrier and natural cocktail dye as sensitizer. The obtained solar cell conversion efficiency was about 3.2 % with fill factor 52% using an irradiation of 100 mW/cm2 at 25º C
Study of the use of dehydrated salts : as electrolytes in the fuel cells
117-123The main advantage of the non-conventional energy sources over the conventional energy sources is its cleanness, low chemical
and noise pollution, high fuel efficiency with better fuel flexibility and economy. Fuel cells are electrochemical devices that convert
the chemical energy of a fuel directly and very efficiently into electricity. Here we report a new class of electrolyte, i.e.
polycrystalline dehydrated salts as an intermediate temperature fuel cell electrolyte. The porous conduction in the dehydrated
salts was established by the study of DTA/TGA, transference number, bulk electrical conductivity measurement and EMF study
Production of solar hydrogen energy by nanostructured semiconductor photoelectrode
75-78The present paper describes the modification and solar
hydrogen production studies employing a new semiconductor-septum (SC-SEP)
photoelectrode ns-TiO2-In2O3 admixed/Ti based
photoelectrochemical solar cell. The current-voltage characteristics of the
above SC-SEP cell
revealed that an enhancement in short-circuit current (ISC)
up to three times (5~14.6 mAcm-2). The optimum hydrogen production rate was
found to be 11.8 lh-1m-2 for 5 M H2SO4 and with a further
increase in H2SO4 concentration, the hydrogen production rate was found to be
invariant. In yet another part of our study instead of using
new SC-SEP solar cell design, we used a new material form such as ns-TiO2-WO3.
The WO3 admixed ns-TiO2 exhibited a high photo-current and
photo-voltage of 15.6 mAcm-2, 960 mV, respectively. The ns-TiO2-WO3
electrode exhibited a higher hydrogen gas evolution rate of
13.8 lh-1m-2
Structural and dielectric studies of [PVA –LiAc] : TiO<sub>2</sub> polymer nano-composite system
70-74An attempt has been made in the present work to prepare
Poly Vinyl Alcohol (PVA) based proton conducting gel electrolyte that
characterizes
them. Nano composite polymer electrolyte consisting of
Poly Vinyl Alcohol (PVA), Lithium acetate with TiO2 filler, is
synthesized by the
combination of solution cast technique and sol-gel
process. Electrically conducting polymer have been most widely accomplished
using
chemical and electrochemical processing techniques. The
composite electrolyte films were characterized by different experimental
techniques.
The average particle sizes of composite electrolytes
were in between 20-30 nm and this system is essentially ionic with maximum
conductivity
of polymer electrolyte
90[80PVA-20LiAc]:10TiO2 is [~4.5x10-6 S/cm] at room temperature.
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Millets for Food and Nutrition Security: A Review
Millets are a species of grass plants with small grains that have a remarkable ability to endure severe drought and play an important role in many regions of the country's dietary patterns. Millets possess an abundance amount of minerals, dietary fibre and phytochemicals which makes them nutritionally superior to conventional food grains. Millet also has a high antioxidant capacity and nutraceutical content, which can help prevent oxidative stress-related disorders like diabetes, cancer, and heart disease. Millets have been shown to provide a variety of physiological benefits such as free radical scavenging activity, anti-inflammatory, antitumor, and anti-diabetic properties. Soaking, germination, malting, decortication, and boiling of millets serve to reduce anti-nutritional elements while improving digestibility and nutritional content. Millet is a potentially tremendous crop but under-explored as compared to cereals. Enhancing the consumption of millets would help in addressing the problem of nutritional security, hidden hunger and combating oxidative stress-induced disorders in developing countries