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Alomair N, Al-Aqeel NS, Alabbad SS, Kochkar H, Berhault G, Younas M, Jomni F, Hamdi R, Ercan I. The Role of the Ferroelectric Polarization in the Enhancement of the Photocatalytic Response of Copper-Doped Graphene Oxide-TiO 2 Nanotubes through the Addition of Strontium. ACS OMEGA 2023; 8:8303-8319. [PMID: 36910964 PMCID: PMC9996589 DOI: 10.1021/acsomega.2c06717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
To evaluate the potential role of in situ formed Sr-Ti-O species as a ferroelectric component able to enhance the photocatalytic properties of an adjacent TiO2 semiconductor, Cu-doped/graphene oxide (GO)/TiO2 nanotubes (TiNTs) composites (with 0.5 wt % Cu and 1.0 wt % GO) have been synthesized while progressive amounts of strontium (up to 1.0 wt %) were incorporated at the surface of the composite through incipient wetness impregnation followed by post-thermal treatment at 400 °C. The different resulting photocatalytic systems were then first deeply characterized by means of N2 adsorption-desorption measurements, X-ray diffraction (XRD), UV-vis diffuse reflectance (UV-vis DR), Raman and photoluminescence (PL) spectroscopies, and scanning electron microscopy (SEM) (with energy-dispersive X-ray (EDX) spectroscopy and Z-mapping). In a second step, optimization of the kinetic response of the Sr-containing composites was performed for the formic acid photodegradation under UV irradiation. The Sr-containing Cu/GO/TiNT composites were then fully characterized by electrochemical impedance spectroscopy (EIS) for their dielectric properties showing clearly the implication of polarization induced by the Sr addition onto the stabilization of photogenerated charges. Finally, a perfect correlation between the photocatalytic kinetic evaluation and dielectric properties undoubtedly emphasizes the role of ferroelectric polarization as a very valuable approach to enhance the photocatalytic properties in an adjacent semiconductor.
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Affiliation(s)
- Nuhad
Abdullah Alomair
- Department
of Chemistry, College of Science, Imam Abdulrahman
Bin Faisal University, P. O. Box 1982, 31441 Dammam, Saudi Arabia
- Basic
& Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, 31441 Dammam, Saudi Arabia
| | - Nouf Saleh Al-Aqeel
- Department
of Chemistry, College of Science, Imam Abdulrahman
Bin Faisal University, P. O. Box 1982, 31441 Dammam, Saudi Arabia
- Basic
& Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, 31441 Dammam, Saudi Arabia
| | - Sanaa Saad Alabbad
- Department
of Chemistry, College of Science, Imam Abdulrahman
Bin Faisal University, P. O. Box 1982, 31441 Dammam, Saudi Arabia
| | - Hafedh Kochkar
- Department
of Chemistry, College of Science, Imam Abdulrahman
Bin Faisal University, P. O. Box 1982, 31441 Dammam, Saudi Arabia
- Basic
& Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, 31441 Dammam, Saudi Arabia
| | - Gilles Berhault
- Institut
de Recherches sur la Catalyse et l’Environnement de Lyon, CNRS−Université Lyon I, 69100 Villeurbanne, France
| | - Muhammad Younas
- Core
Research Facilities, King Fahd University
of Petroleum and Minerals, 31261 Dhahran, Saudi Arabia
| | - Fathi Jomni
- Départment
de Physique, Faculté des Science de Tunis, Université Tunis El Manar, Campus
Universitaire, Tunis 1002 Tunisia
| | - Ridha Hamdi
- Basic
& Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, 31441 Dammam, Saudi Arabia
| | - Ismail Ercan
- Department
of Electrical and Electronics Engineering, Faculty of Engineering, Düzce University, Düzce 81010, Turkey
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Tratrat C, Alomair NA, Kochkar H, Jubran al Malih R, Haroun M, Abubshait S, Younas M, Berhault G, Venugopala KN, Nagaraja S, Emeka PM, Elsewedy HS, Nair AB, Kammoun M. Visible-Light-Driven Selective Esterification of Benzaldehyde Derivatives using Strontium-Modified 1D Titanium Dioxide Nanotubes. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Photocatalytic Inactivation of Enterobacter cloacae and Escherichia coli Using Titanium Dioxide Supported on Two Substrates. Processes (Basel) 2018. [DOI: 10.3390/pr6090137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The antibacterial photocatalytic activity of TiO2 supported over two types of substrates, borosilicate glass tubes (TiO2/SiO2-borosilicate glass tubes (BGT)) and low-density polyethylene pellets (TiO2-LDPE pellets), which were placed in a compound parabolic collectors (CPC) reactor, was evaluated against Enterobacter cloacae and Escherichia coli under sunlight. Three solar photocatalytic systems were assessed, suspended TiO2, TiO2/SiO2-BGT and TiO2-LDPE pellets, at three initial bacterial concentrations, 1 × 105; 1 × 103; 1 × 101 CFU/mL of E. coli and total bacteria (E. cloacae and E. coli). The solar photo-inactivation of E. coli was achieved after two hours with 7.2 kJ/L of UV-A, while total bacteria required four hours and 16.5 kJ/L of UV-A. Inactivation order of E. coli was determined, as follows, suspended TiO2/sunlight (50 mg/L) > TiO2-LDPE pellets/sunlight (52 mg/L) > TiO2/SiO2-BGT/sunlight (59 mg/L), the best E. coli. inactivation rate was obtained with TiO2-LDPE pellets/sunlight, within 4.5 kJ/L and 90 min. The highest total bacteria inactivation rate was found for TiO2/sunlight (50 mg/L) and TiO2-LDPE pellets/sunlight (52 mg/L), within 11.2 kJ/L and 180 min. TiO2 deposited over LDPE pellets was the most effective material, which can be successfully used for water disinfection applications. Bacterial regrowth was assessed 24 h after all photocatalytic treatments, none of those microorganisms showed any recovery above the detection limit (2 CFU/mL).
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Booshehri AY, Polo-Lopez M, Castro-Alférez M, He P, Xu R, Rong W, Malato S, Fernández-Ibáñez P. Assessment of solar photocatalysis using Ag/BiVO 4 at pilot solar Compound Parabolic Collector for inactivation of pathogens in well water and secondary effluents. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.08.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Du Y, Xiong H, Dong S, Zhang J, Ma D, Zhou D. Identifying the role of reactive oxygen species (ROSs) in Fusarium solani spores inactivation. AMB Express 2016; 6:81. [PMID: 27696305 PMCID: PMC5045449 DOI: 10.1186/s13568-016-0257-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 09/24/2016] [Indexed: 11/12/2022] Open
Abstract
The inactivation mechanism of photocatalytic disinfectants on bacteria is well known. In contrast, the potential inactivation of fungal spores by visible-light induced photocatalysis has been recognized, but the inactivation mechanism is poorly understood. We hypothesize that photocatalytically generated reactive oxygen species (ROSs) are directly involved in this mechanism. To test this hypothesis, we identified the roles of ROSs in the inactivation of Fusarium solani spores. As the photocatalysts, we doped TiO2 with 3 typical dopants, forming Ag/TiO2, N/TiO2 and Er3+:YAlO3/TiO2. The Ag/TiO2 photocatalysis was dominated by H2O2, with the longest lifetime among the investigated ROSs. Ag/TiO2 photocatalysis yielded almost 100 % inactivation efficiency and preserved the cell-wall shape of the spores, thus minimizing the biomolecule leakage. Er3+:YAlO3/TiO2 was dominated by h+ ROSs, yielding an inactivation efficiency of 91 %; however, the severe leakage released large numbers of molecular bio-products. Severe damage to the cell walls by the h+ species was confirmed in micrograph observations. Subsequent to cell wall breakage, the Er3+:YAlO3/TiO2 nanoparticles entered the spore cells and directly oxidized the intracellular material. The N/TiO2 photocatalysis, with •O2− dominated ROSs, delivered intermediate performance. In conclusion, photocatalysts that generate H2O2-dominated ROSs are most preferred for spore inactivation.
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Byrne JA, Dunlop PSM, Hamilton JWJ, Fernández-Ibáñez P, Polo-López I, Sharma PK, Vennard ASM. A review of heterogeneous photocatalysis for water and surface disinfection. Molecules 2015; 20:5574-615. [PMID: 25830789 PMCID: PMC6272584 DOI: 10.3390/molecules20045574] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 03/16/2015] [Accepted: 03/18/2015] [Indexed: 11/16/2022] Open
Abstract
Photo-excitation of certain semiconductors can lead to the production of reactive oxygen species that can inactivate microorganisms. The mechanisms involved are reviewed, along with two important applications. The first is the use of photocatalysis to enhance the solar disinfection of water. It is estimated that 750 million people do not have accessed to an improved source for drinking and many more rely on sources that are not safe. If one can utilize photocatalysis to enhance the solar disinfection of water and provide an inexpensive, simple method of water disinfection, then it could help reduce the risk of waterborne disease. The second application is the use of photocatalytic coatings to combat healthcare associated infections. Two challenges are considered, i.e., the use of photocatalytic coatings to give “self-disinfecting” surfaces to reduce the risk of transmission of infection via environmental surfaces, and the use of photocatalytic coatings for the decontamination and disinfection of medical devices. In the final section, the development of novel photocatalytic materials for use in disinfection applications is reviewed, taking account of materials, developed for other photocatalytic applications, but which may be transferable for disinfection purposes.
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Affiliation(s)
- John Anthony Byrne
- Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK.
| | - Patrick Stuart Morris Dunlop
- Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK.
| | - Jeremy William John Hamilton
- Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK.
| | | | | | - Preetam Kumar Sharma
- Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK.
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Photocatalytic and photoelectrocatalytic degradation of small biological compounds at TiO2 photoanode: A case study of nucleotide bases. Catal Today 2015. [DOI: 10.1016/j.cattod.2014.04.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Turki A, Guillard C, Dappozze F, Berhault G, Ksibi Z, Kochkar H. Design of TiO2 nanomaterials for the photodegradation of formic acid – Adsorption isotherms and kinetics study. J Photochem Photobiol A Chem 2014. [DOI: 10.1016/j.jphotochem.2014.01.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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