Photocatalytic Degradation Of Tetracycline In Aqueous Solution By Zno Quantum Dots/Tio2 Supported Catalysts

Saidu, Usman (2021) Photocatalytic Degradation Of Tetracycline In Aqueous Solution By Zno Quantum Dots/Tio2 Supported Catalysts. PhD thesis, Perpustakaan Hamzah Sendut.

Download (539kB) | Preview


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.

Item Type: Thesis (PhD)
Subjects: Q Science > QD Chemistry > QD1-999 Chemistry
Divisions: Pusat Pengajian Sains Kimia (School of Chemical Sciences) > Thesis
Depositing User: HJ Hazwani Jamaluddin
Date Deposited: 23 Jun 2022 00:18
Last Modified: 23 Jun 2022 00:18

Actions (login required)

View Item View Item