Photocatalytic Degradation Of Tetracycline In Aqueous Solution By Zno Quantum Dots/Tio2 Supported Catalysts
In this research, TiO2 nanoparticles (TiO2 NPs) were incorporated with 3%, 5%, 8%, and 10% ZnO quantum dots (ZnO QDs) via sol-gel method. The photocatalyts (xZnO QDs/TiO2; x= 3%, 5% 8% and 10%) were characterized using Xray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), atomic...
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| Format: | Thesis |
| Language: | English |
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2021
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| Online Access: | http://eprints.usm.my/53002/1/USMAN%20SAIDU.pdf |
| _version_ | 1797012925733404672 |
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| author | Saidu, Usman |
| author_facet | Saidu, Usman |
| author_sort | Saidu, Usman |
| collection | USM |
| description | In this research, TiO2 nanoparticles (TiO2 NPs) were incorporated with 3%,
5%, 8%, and 10% ZnO quantum dots (ZnO QDs) via sol-gel method. The
photocatalyts (xZnO QDs/TiO2; x= 3%, 5% 8% and 10%) were characterized using Xray
diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), atomic force
microscopy (AFM), high resolution transmission electron microscopy (HRTEM), field
emission scanning electron microscopy (FESEM), ultraviolet-visible diffuse
reflectance spectroscopy (UV-vis DRS) Brunauer-Emmett-Teller (BET), X-ray
photoelectron spectroscopy (XPS), and photoluminescence (PL) analyses. The
synthesized photocatalysts' efficiency in suspended form was tested in the
photodegradation of tetracycline (TC) under visible light irradiation. About 95%
degradation of TC was achieved within 90 min of visible light illumination using 8%-
ZnO QDs/TiO2, under the optimized conditions: TC concentration = 40 mg/L, pH = 9,
catalyst dosage = 250 mg/L. The 8%-ZnO QDs/TiO2 nanocomposite photocatalyst was
immobilized on linear low-density polyethylene (LLDPE) polymer using the solution
casting method. The LLDPE supported composite films (ZnO QDs/TiO2@LLDPE),
each with a different amount of 8%-ZnO QDs/TiO2 nanocomposite (2, 5, 8, and 10
wt.%) were characterized by FTIR, XRD, FESEM, UV-vis-DRS, AFM, water contact
angle, differential scanning calorimetry (DSC), and thermogravimetric (TGA)
analyses. Structural and morphological studies revealed that the nanocomposites were
homogenously dispersed and embedded onto the LLDPE matrix. |
| first_indexed | 2024-03-06T15:54:51Z |
| format | Thesis |
| id | usm.eprints-53002 |
| institution | Universiti Sains Malaysia |
| language | English |
| last_indexed | 2024-03-06T15:54:51Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | usm.eprints-530022022-06-23T00:18:48Z http://eprints.usm.my/53002/ Photocatalytic Degradation Of Tetracycline In Aqueous Solution By Zno Quantum Dots/Tio2 Supported Catalysts Saidu, Usman QD1-999 Chemistry In this research, TiO2 nanoparticles (TiO2 NPs) were incorporated with 3%, 5%, 8%, and 10% ZnO quantum dots (ZnO QDs) via sol-gel method. The photocatalyts (xZnO QDs/TiO2; x= 3%, 5% 8% and 10%) were characterized using Xray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), high resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM), ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS) Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) analyses. The synthesized photocatalysts' efficiency in suspended form was tested in the photodegradation of tetracycline (TC) under visible light irradiation. About 95% degradation of TC was achieved within 90 min of visible light illumination using 8%- ZnO QDs/TiO2, under the optimized conditions: TC concentration = 40 mg/L, pH = 9, catalyst dosage = 250 mg/L. The 8%-ZnO QDs/TiO2 nanocomposite photocatalyst was immobilized on linear low-density polyethylene (LLDPE) polymer using the solution casting method. The LLDPE supported composite films (ZnO QDs/TiO2@LLDPE), each with a different amount of 8%-ZnO QDs/TiO2 nanocomposite (2, 5, 8, and 10 wt.%) were characterized by FTIR, XRD, FESEM, UV-vis-DRS, AFM, water contact angle, differential scanning calorimetry (DSC), and thermogravimetric (TGA) analyses. Structural and morphological studies revealed that the nanocomposites were homogenously dispersed and embedded onto the LLDPE matrix. 2021-03 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/53002/1/USMAN%20SAIDU.pdf Saidu, Usman (2021) Photocatalytic Degradation Of Tetracycline In Aqueous Solution By Zno Quantum Dots/Tio2 Supported Catalysts. PhD thesis, Perpustakaan Hamzah Sendut. |
| spellingShingle | QD1-999 Chemistry Saidu, Usman Photocatalytic Degradation Of Tetracycline In Aqueous Solution By Zno Quantum Dots/Tio2 Supported Catalysts |
| title | Photocatalytic Degradation Of
Tetracycline In Aqueous Solution By
Zno Quantum Dots/Tio2 Supported
Catalysts |
| title_full | Photocatalytic Degradation Of
Tetracycline In Aqueous Solution By
Zno Quantum Dots/Tio2 Supported
Catalysts |
| title_fullStr | Photocatalytic Degradation Of
Tetracycline In Aqueous Solution By
Zno Quantum Dots/Tio2 Supported
Catalysts |
| title_full_unstemmed | Photocatalytic Degradation Of
Tetracycline In Aqueous Solution By
Zno Quantum Dots/Tio2 Supported
Catalysts |
| title_short | Photocatalytic Degradation Of
Tetracycline In Aqueous Solution By
Zno Quantum Dots/Tio2 Supported
Catalysts |
| title_sort | photocatalytic degradation of tetracycline in aqueous solution by zno quantum dots tio2 supported catalysts |
| topic | QD1-999 Chemistry |
| url | http://eprints.usm.my/53002/1/USMAN%20SAIDU.pdf |
| work_keys_str_mv | AT saiduusman photocatalyticdegradationoftetracyclineinaqueoussolutionbyznoquantumdotstio2supportedcatalysts |