Transmittance-Absorbance Conversion Table
This row incrementally increases the whole number in left column by 0.1: (example %T 5.5= 1.260). Transmittance-Absorbance Conversion Table. % Transmittance.
HORIBA Scientific Transmittance/Absorbance Accessory - FL-3031
FL-3031 Transmittance/Absorbance Accessory Operation Manual (Jul 2012) Applications for the Transmittance/Absorbance Accessory .
Absorbance/Transmittance Property Of Natural And Synthetic Dyes
Keywords: Natural synthetic
2.1.2 Reflectance transmittance
https://spie.org/samples/PM229.pdf
Measurement Method of High Absorbance (Low Transmittance
Measurement Method of High Absorbance (Low Transmittance) Samples by UH4150. Sample: : Light shielding apparatus. Instrument. : UH4150. Scan speed.
Absorbance and Transmittance Capability of Mangoes Grape and
This paper focuses on the usage of absorption and transmission properties in the near infra red (NIR) spectrum for quality monitoring of fruits particularly
Spectrophotometer A spectrophotometer is an instrument that
portion of the light rays and will have a lower percent transmittance. /I) is called the optical density (O.D.) or absorbance (A) of the medium.
Beer-Lambert Law: Measuring Percent Transmittance of Solutions at
Molar Absorptivity: The molar absorption coefficient is a measure of how strongly a chemical species absorbs light at a given wavelength. Monochrometer: An
Spectrophotometry Light and Spectra
Absorbance is used more often than percent transmittance because this variable is linear with the concentration of the absorbing substance whereas percent
The Basics of UV-Vis Spectroscopy
1.4 Transmittance and absorbance. 4. 1.5 Summary. 4. 2 How Does a Modern UV-Vis Spectrophotometer Work? 5. 2.1 Instrumental design.
What is the relationship between transmittance and absorbance?
Application of absorbance measurements 1 – Estimate the concentration of a protein which has 1 or more Trp residues You can simulate your own sequences at http://www proteinchemist com/Multbot html if c is too high dilute! for all 20 amino acids together
Searches related to absorbance transmittance PDF
Absorbance measurements allow the following: Determination of the concentration of a substance Kinetic assay of certain chemical reactions The identification of materials The most common use of absorbance measurements is to determine the concentration of a solute This can be done if the absorption coefficient is known and Beer's law is obeyed In
How does absorbance and transmittance relate to one another?
Absorbance and transmittance are inversely proportional to one another. According to Beer’s law, a larger amount of light being transmitted through the sample corresponds to a smaller amount of light being absorbed by the sample. Absorbance and transmittance are parameters that indicate how much light is absorbed and transmitted for a ...
Why is absorbance the negative logarithm of transmittance?
The physical process of the passage of light through a sample is called light transmission, and absorbance is a measure of it. Hence the absorbance becomes the least logarithm of the transmittance and is an important datum to determine the concentration of a sample that is generally dissolved in a solvent such as water, alcohol or any other.
How does absorbance differ from transmittance?
Transmittance is the inverse of absorbance. Absorbance is the light that the solution absorbs whereas transmittance is light which passes though a solution. Also, what is absorbance and transmittance relationship to analyte concentration? The realationship between absorbance and concentration is linear.
What is the difference between absorbance and concentration?
is that concentration is the act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated while absorption is absorption (act or process of absorbing, either liquid or light). The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.
International Journal of Scientific & Engineering Research Volume 11, Issue 11, November-2020 343
ISSN 2229-5518
343IJSER © 2020
*,1Ezeh, Marian .Isioma http://www.ijser.org *,1 Department of PhysicsDelta State University Abraka
Email: ezehmiriam@gmail.com
2Osuji, Rose.Uzo
2Department of Physics/Astronomy
University of Nigeria, Nsukka
Email: uzosuji@yahoo.com
Absorbance/Transmittance Property Of Natural
And Synthetic Dyes In The Fabrication Of Dye
Sensitized Solar Cell
*,1Ezeh, M.I and 2Osuji, R.U *,1 Department of PhysicsDelta State University Abraka
Email: ezehmiriam@gmail.com
2Department of Physics/Astronomy
University of Nigeria, Nsukka
Email: uzosuji@yahoo.com
ABSTRACT
There are two sources of sensitizers: natural, from plants and synthetic from organic dyes, for the fabrication of dye sensitized solar cell. This study
intends to investigate the absorbance/transmittance properties of both sources in order to ascertain the best. Two natural dyes Tomato fruit and Zobo
leaves- plants and synthetic dye- Methyl red have been chosen because of their unique red colour which performs at the Uv-visible region for light
harvesting. The Absorbance and Transmittance properties were carried out and Zobo emerged the best absorber and tomato the best transmittance
material. Keywords: Natural, synthetic, absorbance, transmittance, adhesion.1. INTRODUCTION
Dye sensitized solar cell has emerged one of the best technology for the enhancement of electricity generation since its materials can be sourced locally. The sensitizers are natural dyes extracted from Tomato seed found every market in the country and Zobo leaves used for drinks. The synthetic dye (Methyl red) was used in comparison in order to establish the advantage of natural over synthetic. The metallicoxide ZnO which serves as a good window for absorbtivity and TiO2 which makes the image of the dyes to be visible are composite
systems. When these fabricated dye sensitized solar cells are connected in series a panel is built and the terminals connected to LED diode bulb electricity are generated. These panels can be used to build solar latten or clock depending on the voltage produced. IJSERInternational Journal of Scientific & Engineering Research Volume 11, Issue 11, November-2020 344
ISSN 2229-5518
344IJSER © 2020
*,1Ezeh, Marian .Isioma http://www.ijser.org *,1 Department of PhysicsDelta State University Abraka
Email: ezehmiriam@gmail.com
2Osuji, Rose.Uzo
2Department of Physics/Astronomy
University of Nigeria, Nsukka
Email: uzosuji@yahoo.com
In this study emphasizes will be on the transmittance and absorbance properties of these dyes in the enhancement of light harvesting. Natural dyes: Two types of natural dyes considered in this work are:Zobo: Zobo is the leaf of a
has a botanical name hibiscus sabdariffa also known as red sorrel. Zobo belongs to the malvaceae family, which is a branched, erect annual shrub, with stems are reddish in colour and are up to 3.5m tall. Zobo dye contains the physiochemical group known as anthocyanin whose surface area is 1.54cm2 (fig. 1). Anthocyanin has an optical absorbance with the wavelength of 283nm-516nm, and also has aPeak absorbance of 216AU [1].
Tomato: Tomato is the fruit on a plant and the botanical name is known as Lycopene, with structural formula as shown in fig. 2. It is also a fat soluble carotenoid with 11 conjugated double bonds in the molecule, and it is a precursor of the b-carotene with a well known antioxidant activity, reported as at least twice that of the b-carotene (Sies and Stahl, 1998)[2]. Lycopene content is in the range between 5.40-1500 mg/kg in tomato paste (wet weight)[3]. The structure and fruit are as shown in fig. 2 (a and b). Synthetic dye: Methyl red dye is complex and resists microbial degradation posing serious threat to the environment. These are man- made organic dyes which mean that it can be prepared using conventional means. Methyl red is investigated as promising enhancers of sonochemical destruction of chlorinated hydrocarbon pollutants. It is a pH indicator; it is red in pH under 4.4, yellow in pH 6.2 and orange in between. The chemical structure and the picture of Methyl red are shown in fig. 4a and b respectively. (a) (b) Fig. 1: Chemical structure of anthocyanin dye. Source: [4] (a) (b) Fig.2: Chemical structure of lycopene dye source: [5] IJSERInternational Journal of Scientific & Engineering Research Volume 11, Issue 11, November-2020 345
ISSN 2229-5518
345IJSER © 2020
*,1Ezeh, Marian .Isioma http://www.ijser.org *,1 Department of PhysicsDelta State University Abraka
Email: ezehmiriam@gmail.com
2Osuji, Rose.Uzo
2Department of Physics/Astronomy
University of Nigeria, Nsukka
Email: uzosuji@yahoo.com
(a) (b) Fig.4: Chemical structure of Methyl red dye Source: https://en.m.wikipedia.org/wiki/Methyl_red [6]2. MATERIALS AND METHOD
The following materials were used for this study: tomatoes fruit, Zobo leaves, synthetic methyl red dye, morter, filter, slides, beaker, and distilled water. Chemicals used were ethanol and acetone, equipments were weighing balance, ultrasonic and magnetic stirrer.2.1 Method The two natural and one synthetic dye were extracted using simple
extraction methods.100ml equal volume of ethanol and H2O with 20g of Zobo leaves and
filtered into a beaker. It had a dark wine colour as shown in fig.5.23.80g of Tomatoes seed was crushed and soaked in 20ml of ethanol
over night. A reddish solution was filtered into a beaker shown in fig. 6.20g of powdered methyl red synthetic dye was weighed and soaked in
100ml of distilled water ready for use fig.7.
Sterilized and treated glass slides were placed inside the prepared solution for three days to deposit thin film using chemical bath deposition method. The films were prepared for optical characterization. This was carried out at the energy research centre University of Nigeria Nsukka using SHIMADZU UV-1800 SPECTROPHOTOMETER as shown in fig. 8. These films were placed in (a) and light is allowed to pass through it and there is a display on the screen (c) (graph) as will be discuss later. (a) (b) Fig. 5: Zobo dye solution and slide deposited inside IJSERInternational Journal of Scientific & Engineering Research Volume 11, Issue 11, November-2020 346
ISSN 2229-5518
346IJSER © 2020
*,1Ezeh, Marian .Isioma http://www.ijser.org *,1 Department of PhysicsDelta State University Abraka
Email: ezehmiriam@gmail.com
2Osuji, Rose.Uzo
2Department of Physics/Astronomy
University of Nigeria, Nsukka
Email: uzosuji@yahoo.com
(a) (b) (c) (d)Fig. 6: Tomato dye and slide deposition
(a) Fig.7: Methyl red dye solution and slide deposition2.2 Deposition procedure
The dyes having been carefully extracted and placed in a dish, glassslides were deposited into the solutions for three days to enable proper adhesion of the dye films unto the slides. This was further prepared for
the optical characterization.3. Optical characterization
The optical characterization was carried out using SHIMADZU UV-1800 Spectrophotometer machine situated at the ENERGY research
Development Centre University of Nigeria Nsukka. There are three sections of the machine; the inner chamber Figure 8(a), the outer chamber fig. 8(b) and the screen fig. 8(c). The slides are placed inside an opening in the inner chamber then light shines through it and the transmittance/absorbance result is observed on the screen. The transmittance was done before the absorbance. These results are discussed in details. IJSERInternational Journal of Scientific & Engineering Research Volume 11, Issue 11, November-2020 347
ISSN 2229-5518
347IJSER © 2020
*,1Ezeh, Marian .Isioma http://www.ijser.org *,1 Department of PhysicsDelta State University Abraka
Email: ezehmiriam@gmail.com
2Osuji, Rose.Uzo
2Department of Physics/Astronomy
University of Nigeria, Nsukka
Email: uzosuji@yahoo.com
(a) (b) (c) Fig. 8: Picture of SHIMADZU UV-1800 Spectrophotometer4. RESULTS
The transmittance and absorbance properties of the two natural and one synthetic dye were carried out and results displayed: The transmittance and absorbance of zobo tomato and Methyl red is shown in figs. 9-14. Fig. 9, 10 and 11 shows the transmittance of Zobo dye (Anthocyanin) , Tomato dye (Lycopene) and Methyl red dye while figs.12 and 13 the Absorbance of Zobo dye and Methyl red dye
Fig.9: Transmittance of Zobo dye
IJSERInternational Journal of Scientific & Engineering Research Volume 11, Issue 11, November-2020 348
ISSN 2229-5518
348IJSER © 2020
*,1Ezeh, Marian .Isioma http://www.ijser.org *,1 Department of PhysicsDelta State University Abraka
Email: ezehmiriam@gmail.com
2Osuji, Rose.Uzo
2Department of Physics/Astronomy
University of Nigeria, Nsukka
Email: uzosuji@yahoo.com
Fig. 10: Transmittance of Tomato dye
Fig. 11: Transmittance of Methyl red dye
Fig.12: Absorbance of Methyl red dye
Figure 13: Absorbance of Zobo dye
IJSERInternational Journal of Scientific & Engineering Research Volume 11, Issue 11, November-2020 349
ISSN 2229-5518
349IJSER © 2020
*,1Ezeh, Marian .Isioma http://www.ijser.org *,1 Department of PhysicsDelta State University Abraka
Email: ezehmiriam@gmail.com
2Osuji, Rose.Uzo
2Department of Physics/Astronomy
University of Nigeria, Nsukka
Email: uzosuji@yahoo.com
DISCUSSION
From the result it was observed that there was no absorbance for tomato dye which actually depicts it as a good transmittance material. It is earlier known from the theory of light in optics that a good transmitter would not show absorbance property. Same goes for a good absorber vice versa. Zobo dye showed constant transmittance figure 9, transmittance edges at 350nm, with maximum at 390nm and remain constant while from fig. 10, for tomato dye there was zero transmittance up to 340 nm and a gradual increase to 100% transmittance with no evidence of absorbance. For fig. 11, the synthetic dye Methyl red dye there was zero transmittance up to340nm then from 340 nm to 390 nm there was sharp increase to 100%
transmittance while there was 3.9 absorbance from 300 nm to 380 nm then an increase between 380 nm and 580 nm and a asymptotic decrease to zero fig. 12 . For fig. 13, Zobo dye there was 3.8 absorbance, from 280 nm to 390 nm with peak at 280 nm and then decreased to zero.5. CONCLUSION
From the results presented in figs 9-13 Transmittance and absorbance of Zobo, Tomato and Methyl red, Zobo emerges the best absorber material while Tomato the best transmittance material for the fabrication of dye sensitized solar cell.Acknowledgment
For the success of this research work it is important to acknowledge the staff of the solar energy lab and the energy research centre in University of Nigeria Nsukka who assisted in preparation and getting the result may God reward you all.REFERENCES
[1] L. U, Okoli J. O Ozuomba, A. J , Ekpunobi and P. I. Ekwo (2012) -dyed TiO2 electrode and its performance on dyeResearch Journal of Recent Sciences, vol. 1, pp.
2227.[2] vol.
218, pp. 121-124.
[3] J Shi and M.L Magner 334[4] J. M. R. C Fernando and G. K. R
Anthocyanin as photo sensitizers for dye-
Current Science, no. 95 vol. 5, pp. 663-666.
[5] S Kamiloglu, M Demirci, S Selen, G Toydemir D , Boyacioglu and E Capanoglu. (2014). "Home processing of tomatoes (Solanum lycopersicum): Effects onin vitrobio accessibility of total lycopene, phenolics, flavonoids, and antioxidant capacity". Journal of the Science of Food and Agriculture No.94, vol.11, pp. 222533. [6] https://en.m.wikipedia.org/wiki/Methyl_red IJSERquotesdbs_dbs22.pdfusesText_28[PDF] absorbance définition
[PDF] formule absorbance longueur d'onde
[PDF] absorbance d'une solution colorée
[PDF] absorbance 1ere s
[PDF] absorbance maximale
[PDF] activité rayonnement dans lunivers corrigé
[PDF] cours ondes et particules terminale s
[PDF] atmosphere et rayonnement dans l'univers corrigé
[PDF] vitesse de propagation des rayons x dans l'air
[PDF] tube rayon x principe
[PDF] loi datténuation des photons
[PDF] coefficient datténuation massique
[PDF] capacité d'abstraction définition
[PDF] comment expliquer difficultes d abstraction
