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...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
2021
|
| Subjects: | |
| Online Access: | http://eprints.usm.my/53002/1/USMAN%20SAIDU.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| id |
my-usm-ep.53002 |
|---|---|
| record_format |
uketd_dc |
| spelling |
my-usm-ep.530022022-06-23T00:18:48Z Photocatalytic Degradation Of Tetracycline In Aqueous Solution By Zno Quantum Dots/Tio2 Supported Catalysts 2021-03 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 http://eprints.usm.my/53002/ http://eprints.usm.my/53002/1/USMAN%20SAIDU.pdf application/pdf en public phd doctoral Perpustakaan Hamzah Sendut Pusat Pengajian Sains Kimia |
| institution |
Universiti Sains Malaysia |
| collection |
USM Institutional Repository |
| language |
English |
| topic |
QD1-999 Chemistry |
| spellingShingle |
QD1-999 Chemistry Saidu, Usman Photocatalytic Degradation Of Tetracycline In Aqueous Solution By Zno Quantum Dots/Tio2 Supported Catalysts |
| 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. |
| format |
Thesis |
| qualification_name |
Doctor of Philosophy (PhD.) |
| qualification_level |
Doctorate |
| author |
Saidu, Usman |
| author_facet |
Saidu, Usman |
| author_sort |
Saidu, Usman |
| title |
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_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_sort |
photocatalytic degradation of
tetracycline in aqueous solution by
zno quantum dots/tio2 supported
catalysts |
| granting_institution |
Perpustakaan Hamzah Sendut |
| granting_department |
Pusat Pengajian Sains Kimia |
| publishDate |
2021 |
| url |
http://eprints.usm.my/53002/1/USMAN%20SAIDU.pdf |
| _version_ |
1747822215035879424 |