Role of heterocyclic dye (Azur A) as a photosensitizer in photogalvanic cell for solar energy conversion and storage: NaLS–ascorbic acid system

Genwa, K. R.; Chouhan, Anju

doi:10.1016/j.solener.2005.06.020

Cited by 26 publications

(11 citation statements)

References 13 publications

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“…To put this suggestion into application, various studies on photo-galvanic cell systems have been reported. The use of various dye photo-sensitizers, such as thionine, 3 methylene blue, 4 thionine-loaded Naon lm, 5 bromophenol red, 6 fuchsine basic, 7 Congo red, 8 azure A, 10 and malachite green; 11 various inorganic and organic reductants, such as iron, 3 ethylenediamine tetraacetate-EDTA, 6-8 ascorbic acid, 10 and arabinose; 10 and various surfactants, such as NaLS, 10,11 Tween-80, 13 diethylenetriaminepentaacetic acid (DPTA), 17 and dioctylsulphosuccinate (DSS) 20 have been reported for solar energy and conversion through PG cells. A literature survey reveals that the main fabrication components of PG cells are an anodic electrode (Pt), cathodic electrode (saturated calomel electrode-SCE), sensitizer(s), reductant(s), NaOH, H-shaped glass tubes, etc., and the optimum electrical cell performance is dependent on variables such as concentration (of the sensitizer, reductant, surfactant, and NaOH, i.e., pH), diffusion length, electrodes, electrode kinetics, diffusion, external load, illumination intensity, and temperature.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous electrochemical solar power generation and storage using metanil yellow-formic acid as a new sensitizer-reductant couple in photogalvanic cells

2019

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With the rapid commercialization of solar and wind power as supplements and potential substitutes of fossil fuels, the need for power storage techniques to render renewable energy sources impervious to climatic variations has gained significant importance recently. In addition to this requirement of power storage, photo-galvanic (PG) cells hold special significance because these photo-electrochemical devices are capable of simultaneous solar power generation and storage. PG cells with performance as high as 649.6 mW power (P pp ), 2250 mA current (i sc ), 1048 mV potential (V oc ), 8.12% conversion efficiency (CE), and 59 minutes power storage capacity (as half-time, t 0.5 ) have been reported under artificial and low illumination intensities. To enable PG cells, a future source of solar energy conversion, with storage as well, their efficiency must be improved further to a level comparable to that of photovoltaic cells. The metanil yellow dye (photo-sensitizer)-formic acid (reductant) couple has not been exploited to date for this purpose. Therefore, in the present study, the metanil yellow dye as a photosensitizer and formic acid as a reductant have been used in the presence of sodium lauryl sulfate surfactant and sodium hydroxide alkaline medium to further increase the solar energy conversion efficiency and storage capacity of PG cells. The present study reports greatly enhanced electrical performance (compared to earlier results for similar cells) of P pp 822 mW, i sc 6000 mA, V oc 1110 mV, CE 20.41%, and t 0.5 105 minutes. On the basis of the redox potential and reported data, a plausible mechanism has also been proposed for the photo-generation of current in metanil yellow-formic acid photogalvanics. ; Tel: +91 291 2614162 † Electronic supplementary information (ESI) available. See

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Section: Introductionmentioning

confidence: 99%

Simultaneous electrochemical solar power generation and storage using metanil yellow-formic acid as a new sensitizer-reductant couple in photogalvanic cells

2019

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“…A detailed literature survey by Eisenberg and Silverman (1961), Murthy and Reddy (1983), Yamase (1981), Tamilasaran and Natarajan (1981), Ameta et al (1990aAmeta et al ( , 1990bAmeta et al ( , 1991, Regar (1997, 1999), Sharma et al (in press), Lal (2000, 2001), Genwa and Chouhan (2006), Gangotri and Meena (2006), Gangotri and Pramila (2006), Pramila and Gangotri (2007), Gangotri and Gangotri (2009), Gangotri and Indora (2010), Gangotri and Bhimwal (2010), and Bhimwal and Gangotri (2011), and Genwa and Genwa (2008) reveals that different micellar species, photosensitizers, and reductants have been used in photogalvanic cells, but no attention has been paid to the use of EDTA-Safranine O-NaLS to enhance the electrical output and performance of the photogalvanic cells with special attention to reduce the cost of the cell to gain commercial viability. Therefore, the present work was undertaken.…”

Section: Introductionmentioning

confidence: 99%

Studies of the Micellar Effect on Photogalvanics: Solar Energy Conversion and Storage—EDTA-Safranine O-NaLS System

Gangotri

2013

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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The studies of the micellar effect on photogalvanics were done for solar energy conversion and storage in photogalvanic cell containing sodium lauryl sulphate as anionic micellar species, ethylenediamine tetra acetic acid as reductant, and Safranine O as photosensitizer. The photopotential and photocurrent generated were 871.8 mV and 200.0 A, respectively. The observed conversion efficiency was 0.7213%, the fill factor was 0.35, and the maximum power of the cell was 174.2 W, whereas the power at the power point of the photogalvanic cell was 75.02 W. The rate of initial generation of current was 50.0 A min 1 . The photogalvanic cell can be used for 40.0 min in the dark. The effects of different parameters on the electrical output of the photogalvanic cell were observed and a mechanism was proposed for the generation of photocurrent in the photogalvanic cell.

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“…They obtained photopotential and photocurrent as 80.0 μA and 340.0 mV and 60.0 μA and 362.0 mV, respectively. Genwa and Chouhan (2006) have also used Azur A as a photosensitizer with ascorbic acid as reductant, and they observed photopotential, photocurrent, conversion efficiency and storage capacity as 770.0 mV, 110.0 μA, 0.5461% and 110.0 min, respectively. Conclusively, the efforts are fruitful for selecting more efficient reductants and photosensitizers in order to further increase the electrical output, conversion efficiency and storage capacity of photogalvanic cells to attain a market competitive status among the other existing solar cells.…”

Section: Resultsmentioning

confidence: 99%

Studies of mixed reductant systems with Azur A as photosensitizer for solar energy conversion and storage in photogalvanic cells

Gangotri

Indora

Bhimwal

2011

International Journal of Sustainable Energy

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Purpose: The role of mixed reductant systems in photogalvanic cells was studied in a photogalvanic system containing Azur A as photosensitizer, EDTA as reductant, which was mixed with dextrose, NTA and oxalic acid, respectively, for increasing the conversion efficiency and storage capacity of photogalvanic cells.Design/methodology/approach: This research presents an interesting photogalvanic system for improvement of conversion efficiency and storage capacity to reduce the cost of construction and ensure commercial viability.Findings: Observed values of photopotential and photocurrent for EDTA + dextrose-Azur A system are 778.0 mV, 55.0 μA, for EDTA + NTA-Azur A system are 830.0 mV, 292.0 μA and for EDTA + oxalic acid-Azur A system are 810.0 mV, 210.0 μA, respectively.Originality/value: The observed conversion efficiencies in these systems are 0.1045%, 0.9830% and 0.9092%, respectively, whereas storage capacities are 115.0 min., 290.0 min. and 86.0 min., respectively. It shows a higher performance of cells to gain its commercial viability.

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Role of heterocyclic dye (Azur A) as a photosensitizer in photogalvanic cell for solar energy conversion and storage: NaLS–ascorbic acid system

Cited by 26 publications

References 13 publications

Simultaneous electrochemical solar power generation and storage using metanil yellow-formic acid as a new sensitizer-reductant couple in photogalvanic cells

Simultaneous electrochemical solar power generation and storage using metanil yellow-formic acid as a new sensitizer-reductant couple in photogalvanic cells

Studies of the Micellar Effect on Photogalvanics: Solar Energy Conversion and Storage—EDTA-Safranine O-NaLS System

Studies of mixed reductant systems with Azur A as photosensitizer for solar energy conversion and storage in photogalvanic cells

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