Next Article in Journal
Enhanced Pharmaceutically Active Compounds Productivity from Streptomyces SUK 25: Optimization, Characterization, Mechanism and Techno-Economic Analysis
Next Article in Special Issue
Biosorbents from Plant Fibers of Hemp and Flax for Metal Removal: Comparison of Their Biosorption Properties
Previous Article in Journal
Identification of Novel Inhibitors of Escherichia coli DNA Ligase (LigA)
Previous Article in Special Issue
Sliding Water Droplet on Oil Impregnated Surface and Dust Particle Mitigation
Article

Floating ZnO QDs-Modified TiO2/LLDPE Hybrid Polymer Film for the Effective Photodegradation of Tetracycline under Fluorescent Light Irradiation: Synthesis and Characterisation

1
School of Chemical Sciences, Universiti Sains Malaysia, Gelugor, Penang 11800, Malaysia
2
School of Materials & Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal, Penang 14300, Malaysia
3
Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, Kepala Batas, Penang 13200, Malaysia
4
Experimental and Theoretical Research Lab, Department of Chemistry, Kulliyyah of Science, Kuantan, Pahang 25200, Malaysia
5
Surfactant Research Chair, Chemistry Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
6
Department of Chemistry, University of Saskatchewan, 110 Science Place, Room 165 Thorvaldson Building, Saskatoon, SK S7N 5C9, Canada
*
Authors to whom correspondence should be addressed.
Academic Editors: Wanhong Ma and Marcello Brigante
Molecules 2021, 26(9), 2509; https://doi.org/10.3390/molecules26092509
Received: 15 March 2021 / Revised: 19 April 2021 / Accepted: 20 April 2021 / Published: 25 April 2021
(This article belongs to the Special Issue Environmental Applications of Polymers)
In this work, mesoporous TiO2-modified ZnO quantum dots (QDs) were immobilised on a linear low-density polyethylene (LLDPE) polymer using a solution casting method for the photodegradation of tetracycline (TC) antibiotics under fluorescent light irradiation. Various spectroscopic and microscopic techniques were used to investigate the physicochemical properties of the floating hybrid polymer film catalyst (8%[email protected]). The highest removal (89.5%) of TC (40 mg/L) was achieved within 90 min at pH 9 due to enhanced water uptake by the LDDPE film and the surface roughness of the hybrid film. The formation of heterojunctions increased the separation of photogenerated electron-hole pairs. The QDs size-dependent quantum confinement effect leads to the displacement of the conduction band potential of ZnO QDs to more negative energy values than TiO2. The displacement generates more reactive species with higher oxidation ability. The highly stable film photocatalyst can be separated easily and can be repeatedly used up to 8 cycles without significant loss in the photocatalytic ability. The scavenging test indicates that the main species responsible for the photodegradation was O2. The proposed photodegradation mechanism of TC was demonstrated in further detail based on the intermediates detected by LC-time-of-flight/mass spectrometry (LC/TOF-MS). View Full-Text
Keywords: LLDPE; zinc oxide; titanium dioxide; quantum dots; tetracycline; photodegradation LLDPE; zinc oxide; titanium dioxide; quantum dots; tetracycline; photodegradation
Show Figures

Graphical abstract

MDPI and ACS Style

Iqbal, A.; Saidu, U.; Adam, F.; Sreekantan, S.; Yahaya, N.; Ahmad, M.N.; Ramalingam, R.J.; Wilson, L.D. Floating ZnO QDs-Modified TiO2/LLDPE Hybrid Polymer Film for the Effective Photodegradation of Tetracycline under Fluorescent Light Irradiation: Synthesis and Characterisation. Molecules 2021, 26, 2509. https://doi.org/10.3390/molecules26092509

AMA Style

Iqbal A, Saidu U, Adam F, Sreekantan S, Yahaya N, Ahmad MN, Ramalingam RJ, Wilson LD. Floating ZnO QDs-Modified TiO2/LLDPE Hybrid Polymer Film for the Effective Photodegradation of Tetracycline under Fluorescent Light Irradiation: Synthesis and Characterisation. Molecules. 2021; 26(9):2509. https://doi.org/10.3390/molecules26092509

Chicago/Turabian Style

Iqbal, Anwar, Usman Saidu, Farook Adam, Srimala Sreekantan, Noorfatimah Yahaya, Mohammad N. Ahmad, Rajabathar J. Ramalingam, and Lee D. Wilson. 2021. "Floating ZnO QDs-Modified TiO2/LLDPE Hybrid Polymer Film for the Effective Photodegradation of Tetracycline under Fluorescent Light Irradiation: Synthesis and Characterisation" Molecules 26, no. 9: 2509. https://doi.org/10.3390/molecules26092509

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop