Tc 100 ppm Tc 80 ppm Tc 60 ppm · H 2 O 638 - 521 Ti - O - Ti 3448 O - H 0 10 20 30 40 50 60 70 5...
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PHOTOCATALYTIC ACTIVITY OF NANO TIO 2 POWDER FOR DYE AND ANTIBIOTIC DEGRADATION Honour OLADELE 1* , Tran Thi Viet HA 1 , Ikuro Kasuga 1,2 1 VNU-Vietnam Japan University, Vietnam National University, Hanoi, Vietnam, 2 The University of Tokyo, Tokyo, Japan * [email protected] consisting of oxygen and titanium elemental particles Morphology Analysis using SEM Methods Results and discussion Conclusion Objectives Characterization of the photo-catalyst, commercial TiO2 material Optimization of the experimental condition including initial dye concentration, the catalyst dose and irradiation time Analyze the photo-catalytic activity of commercially purchased TiO 2 during the degradation of Tetracycline and methylene blue pollutants under UV Irradiation Materials and apparatus Methylene blue Trihydrate Tetracycline crystalline powder Commercial Titanium (IV) oxide, Anatase (with purity of 99.7%) 6oo mL Homemade dark beaker 360 W ultraviolet lamp. Experimental design and procedure Analytical calculation Adsorption Efficiency and photo-catalytic activity is calculated as (%) = 0− 0 ×100 0 = initial pollutant concentration = concentration of the pollutant at the time (t) of aliquot withdrawal Removal Efficiency = Adsorption + photo catalytic activity Figure 4. The SEM images and EDX pattern of TiO2 particle Characterization of TiO 2 Morphology analysis using Scanning Electron Microscope (SEM) Figure 5. The mapping images of a) TiO2 material consisting of b) oxygen and c) titanium elemental particles PHOTO-CATALYTIC ACTIVITY UNDER THE ULTRAVIOLET LIGHT Figure 6. The Fourier transform infrared spectra of TiO2 material Treatment of Methylene blue and Tetracycline with TiO 2 ADSORPTION TEST IN THE DARK CONDITION Figure 7. The TiO 2 adsorption efficiency test for different concentration of methylene blue and tetracycline. Total reaction time= 60 min; temperature= 25 o c; Volume of the sample solution= 200mL; absorbance wavelength for methylene blue =664 nm, tetracycline= 357 nm PHOTO-CATALYTIC ACTIVITY UNDER THE ULTRAVIOLET LIGHT Figure 8. The rate of photo-catalytic activity of UV/ TiO 2 on concentrations of methylene blue and tetracycline. Total reaction time = 120 min; temperature= 25 o c; Volume of the sample solution= 200mL; absorbance wavelength for methylene blue =664 nm, tetracycline= 357 nm, UV Lamp=360W; exposure time intervals = 15 min REMOVAL EFFICIENCY OF METHYLENE BLUE AND TETRACYCLINE WITH TiO 2 Figure 9. The effect of initial concentration on Mb and TC removal efficiency. Mb concentration= 5,10,15,20 ppm; Tc concentration= 40,60,80,100 ppm; Mb absorbance = 664 nm; TC absorbance= 357nm; temperature= 25 o C, total reaction time=3 hr EFFECT OF CATALYST DOSE ON PHOTO-CATALYTIC ACTIVITY Figure 10. Effect of Catalyst dosage on the photocatalyic degradation of the optimized concentration of organic pollutants; Concentration of methylene blue= 5 ppm, Tetracycline= 40 ppm; catalyst=TiO 2 (0.2g/L, 0.3g/L, 0.5g/L); temperature= 25 o c This study applied the photo-catalytic process in removing organic pollutants; methylene blue and tetracycline using commercial TiO2 material The results obtained from SEM, EDX and FTIR analysis confirmed the purchased commercially produced material to be TiO2 The optimal concentration for Mb and Tc was found to be at 5 ppm and 40 ppm respectively within 180 mins The result obtained showed UV/TiO2 to be an efficient photocatalyst in the removal of organic pollutants from water Introduction Figure 1. Illustrating the Emergence of Organic pollutants in water UV LIGHT (WAVELENGTH – 360nm Cooling Unit Hard Cardboard Dark Beaker TiO2 + Sample Magnetic Bar Figure 2. Schematic illustration of the set-up of the photocatalytic experiment Step 1 Calibration of Mb and Tc to different concentration Step 2 Adsorption of TiO2 in the dark condition Step 3 Photocatalytic activity under the UV light Step 4 Aliquot was centrifuge for 20 min at a speed of 10, 000 rpm using K Model PLC-012E universal centrifuge Step 5 Unico S 2150 UV spectrophotometer was used to measure absorbance Figure 3. The overall process of the photocatalytic experiment a c b Fourier Transform Infrared Spectroscopy 1105 H2O 638 - 521 Ti - O - Ti 3448 O - H 0 10 20 30 40 50 60 70 5 10 15 20 25 30 35 40 MB Adsorption Efficiency (%) Time (min) Mb 5 ppm Mb 10 ppm Mb 15 ppm Mb 20 ppm 0 20 40 60 0 2 4 6 8 10 12 14 16 18 Tc Adsorption Efficiency(%) Time (min) Tc(40 ppm) Tc(60 ppm) Tc(80 ppm) Tc(100 ppm) 0 15 30 45 60 75 90 105 120 135 0 20 40 60 80 100 Mb Photocatalytic activity(%) Time (min) Mb 5 ppm Mb 10 ppm Mb 15 ppm Mb 20 ppm 0 15 30 45 60 75 90 105 120 0 20 40 60 80 100 Tc Photocatalytic Activity (%) Time (min) Tc 40 ppm Tc 60 ppm Tc 80 ppm Tc 100 ppm 0 20 40 60 80 100 120 140 160 180 200 0 20 40 60 80 100 Tc Removal Efficiency (%) Time (min) Tc 40 ppm Tc 60 ppm Tc 80 ppm Tc 100 ppm Distance – 18 cm Magnetic Stirrer Dark UV Irradiation Dark UV Irradiation 0 20 40 60 80 100 120 140 160 180 200 0 20 40 60 80 100 Mb Removal Efficiency (%) Time (min) mb 5ppm mb 10ppm mb 15ppm mb 20ppm 0 20 40 60 80 100 15 30 45 60 75 90 105 120 Tc Removal Efficiency (%) Time (mins) 0.2 g/L 0.3 g/L 0.5 g/L 0 20 40 60 80 100 15 30 45 60 75 90 105 120 Mb Removal efficiency (%) Time (mins) 0.05g/L 0.2g/L 0.5g/L
Transcript of Tc 100 ppm Tc 80 ppm Tc 60 ppm · H 2 O 638 - 521 Ti - O - Ti 3448 O - H 0 10 20 30 40 50 60 70 5...
PHOTOCATALYTIC ACTIVITY OF NANO TIO2 POWDER FOR DYE AND ANTIBIOTIC DEGRADATION
Honour OLADELE1*, Tran Thi Viet HA1, Ikuro Kasuga1,2
1VNU-Vietnam Japan University, Vietnam National University, Hanoi, Vietnam, 2The University of Tokyo, Tokyo, Japan * [email protected]
consisting of oxygen and titanium elemental particles Morphology Analysis using SEM
Methods
Results and discussion
Conclusion
Objectives Characterization of the photo-catalyst, commercial TiO2 material
Optimization of the experimental condition including initial dye concentration, the catalyst
dose and irradiation time
Analyze the photo-catalytic activity of commercially purchased TiO2 during the degradation
of Tetracycline and methylene blue pollutants under UV Irradiation
Materials and apparatus
Methylene blue Trihydrate
Tetracycline crystalline powder
Commercial Titanium (IV) oxide, Anatase
(with purity of 99.7%)
6oo mL Homemade dark beaker
360 W ultraviolet lamp.
Experimental design and procedure
Analytical calculation
Adsorption Efficiency and photo-catalytic
activity is calculated as (%) = 𝐶0−𝐶𝑒𝐶0
×100
𝐶0 = initial pollutant concentration𝐶𝑒 = concentration of the pollutant at the time
(t) of aliquot withdrawal
Removal Efficiency = Adsorption + photo catalytic activity
Figure 4. The SEM images and EDX pattern of TiO2 particle
Characterization of TiO2
Morphology analysis using Scanning Electron
Microscope (SEM)
Figure 5. The mapping images of a) TiO2 material consisting of b) oxygen and c) titanium elemental particles
PHOTO-CATALYTIC ACTIVITY UNDER THE ULTRAVIOLET LIGHT
Figure 6. The Fourier transform infrared spectra of TiO2 material
Treatment of Methylene blue and Tetracycline with TiO2
ADSORPTION TEST IN THE DARK CONDITION
Figure 7. The TiO2 adsorption efficiency test for different
concentration of methylene blue and tetracycline. Total reaction
time= 60 min; temperature= 25oc; Volume of the sample solution=
200mL; absorbance wavelength for methylene blue =664 nm,
tetracycline= 357 nm PHOTO-CATALYTIC ACTIVITY UNDER THE ULTRAVIOLET LIGHT
Figure 8. The rate of photo-catalytic activity of UV/ TiO2 on
concentrations of methylene blue and tetracycline. Total reaction
time = 120 min; temperature= 25oc; Volume of the sample
solution= 200mL; absorbance wavelength for methylene blue
=664 nm, tetracycline= 357 nm, UV Lamp=360W; exposure time
intervals = 15 min
REMOVAL EFFICIENCY OF METHYLENE BLUE AND TETRACYCLINE WITH TiO2
Figure 9. The effect of initial concentration on Mb and TC removal
efficiency. Mb concentration= 5,10,15,20 ppm; Tc concentration=
40,60,80,100 ppm; Mb absorbance = 664 nm; TC absorbance=
357nm; temperature= 25oC, total reaction time=3 hr
EFFECT OF CATALYST DOSE ON PHOTO-CATALYTIC ACTIVITY
Figure 10. Effect of Catalyst dosage on the photocatalyic
degradation of the optimized concentration of organic pollutants;
Concentration of methylene blue= 5 ppm, Tetracycline= 40 ppm;
catalyst=TiO2 (0.2g/L, 0.3g/L, 0.5g/L); temperature= 25oc
This study applied the photo-catalytic process in removing organic pollutants; methylene blue and tetracycline using commercial TiO2 material
The results obtained from SEM, EDX and FTIR analysis confirmed the purchased commercially produced material to be TiO2
The optimal concentration for Mb and Tc was found to be at 5 ppm and 40 ppm respectively within 180 mins
The result obtained showed UV/TiO2 to be an efficient photocatalyst in the removal of organic pollutants from water
Introduction
Figure 1. Illustrating the Emergence of Organic pollutants in water
UV LIGHT (WAVELENGTH – 360nmCooling
Unit
Hard Cardboard
Dark BeakerTiO2 + Sample
Magnetic Bar
Figure 2. Schematic illustration of the set-up of the photocatalytic experiment
Step 1
Calibration of Mb and Tcto different concentration
Step 2Adsorption of TiO2 in the dark condition
Step 3Photocatalytic activity under the UV light
Step 4Aliquot was centrifuge for 20 min at a speed of10, 000 rpm using K Model PLC-012E universal centrifuge
Step 5Unico S 2150 UV spectrophotometer was used to measure absorbance
Figure 3. The overall process of the photocatalytic experiment
acb
Fourier Transform Infrared Spectroscopy
1105 H2O
638 - 521 Ti - O - Ti
3448 O - H
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Tc R
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Time (min)
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Distance – 18 cm
Magnetic Stirrer
DarkUV Irradiation
Dark UV Irradiation
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%)
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0.05g/L 0.2g/L 0.5g/L
