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Althamthami M, Temam HB, Temam EG, Rahmane S, Gasmi B, Hasan GG. Impact of surface topography and hydrophobicity in varied precursor concentrations of tenorite (CuO) films: a study of film properties and photocatalytic efficiency. Sci Rep 2024; 14:7928. [PMID: 38575755 PMCID: PMC10995127 DOI: 10.1038/s41598-024-58744-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 04/02/2024] [Indexed: 04/06/2024] Open
Abstract
Semiconductor films are crucial in photocatalysis applications, yet their controlled production remains challenging. Previous studies have mainly focused on deposition processes, heating rates, and doping of semiconductor oxides. In this paper, we introduce a novel method for fabricating tenorite (CuO) semiconductor films with varying precursor concentrations (0.01, 0.02, 0.04, 0.06, and 0.1 g/ml) using a dip-coating technique. We explore the impact of contact angles, 3D surface topography, and film thickness on photoactivation properties, areas with limited previous research focus. The results demonstrate that higher-concentration tenorite films (0.1 g/ml) exhibit rougher surfaces (77.3 nm), increased hydrophobicity (65.61°), improved light-harvesting ability, enhanced charge separation, and higher active oxygen output. The crystal sizes were within the range of 7.3-44.1 nm. Wettability tests show a 21.47% improvement in the 0.1 g/ml film surface under indirect sunlight compared to darkness. Transmittance rates in the 600 nm range were from 0.02 to 90.94%. The direct optical band gaps were 1.21-2.74 eV, while the indirect band gaps remained unaffected (0.9-1.11 eV). Surface morphology analysis reveals an increased presence of grains with higher concentrations. Regarding photocatalysis's impact on film morphology and copper content, SEM images reveal minimal changes in film structure, while copper content remains stable with slight variations. This suggests strong adhesion of tenorite to the film after photocatalysis. Tenorite thin films display exceptional photocatalytic efficiency, making them suitable for practical applications.
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Affiliation(s)
- Mohammed Althamthami
- Physics Laboratory of Thin Films and Applications, Biskra University, BP 145 RP, 07000, Biskra, Algeria.
| | - Hachemi Ben Temam
- Physics Laboratory of Thin Films and Applications, Biskra University, BP 145 RP, 07000, Biskra, Algeria
| | - Elhachmi Guettaf Temam
- Physics Laboratory of Thin Films and Applications, Biskra University, BP 145 RP, 07000, Biskra, Algeria
| | - Saâd Rahmane
- Physics Laboratory of Thin Films and Applications, Biskra University, BP 145 RP, 07000, Biskra, Algeria
| | - Brahim Gasmi
- Physics Laboratory of Thin Films and Applications, Biskra University, BP 145 RP, 07000, Biskra, Algeria
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Ganesan S, Kokulnathan T, Sumathi S, Palaniappan A. Efficient photocatalytic degradation of textile dye pollutants using thermally exfoliated graphitic carbon nitride (TE-g-C 3N 4). Sci Rep 2024; 14:2284. [PMID: 38280908 PMCID: PMC10821873 DOI: 10.1038/s41598-024-52688-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 01/22/2024] [Indexed: 01/29/2024] Open
Abstract
Graphitic carbon nitride (g-C3N4), an organic photocatalyst was reported to have beneficial properties to be used in wastewater treatment applications. However, g-C3N4, in its bulk form was found to have poor photocatalytic degradation efficiency due to its inherent limitations such as poor specific surface area and fast electron-hole pair recombination rate. In this study, we have tuned the physiochemical properties of bulk g-C3N4 by direct thermal exfoliation (TE-g-C3N4) and examined their photocatalytic degradation efficiency against abundant textile dyes such as methylene blue (MB), methyl orange (MO), and rhodamine B (RhB). The degradation efficiencies for MB, MO, and RhB dyes are 92 ± 0.18%, 93 ± 0.31%, and 95 ± 0.4% respectively in 60 min of UV light irradiation. The degradation efficiency increased with an increase in the exfoliation temperature. The prepared catalysts were characterized using FTIR, XRD, FE-SEM, EDAX, BET, and UV-DRS. In BET analysis, TE-g-C3N4 samples showed improved surface area (48.20 m2/g) when compared to the bulk g-C3N4 (5.03 m2/g). Further, the TE-g-C3N4 had 2.98 times higher adsorption efficiency than the bulk ones. The free radicals scavenging studies revealed that the superoxide radicals played an important role in the photodegradation for dyes, when compared to the hydroxyl radical (.OH) and the photo-induced holes (h+), Photoluminescence (PL) emission and electrochemical impedance spectroscopy (EIS) spectra of TE-g-C3N4 indicated a lowered electron-hole pairs' recombination rate and an increased photo-induced charge transfer respectively. Further, the TE-g-C3N4 were found to have excellent stability for up to 5 cycles with only a minor decrease in the activity from 92% to 86.2%. These findings proved that TE-g-C3N4 was an excellent photocatalyst for the removal and degradation of textile dyes from wastewater.
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Affiliation(s)
- Selvaganapathy Ganesan
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India
- Human Organ Manufacturing Engineering (HOME), Lab, Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India
| | - Thangavelu Kokulnathan
- Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, 106, Taiwan
| | - Shanmugam Sumathi
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India
| | - Arunkumar Palaniappan
- Human Organ Manufacturing Engineering (HOME), Lab, Centre for Biomaterials, Cellular and Molecular Theranostics (CBCMT), Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India.
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Yu X, Wang S, Xie H, Yi Z, Tang J, Gao H, Yang H, Fang L, Syed A. Nano spinel NiAl 2O 4: structure, optical and photocatalytic performance evaluation and optimization. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 36:105201. [PMID: 38011735 DOI: 10.1088/1361-648x/ad1000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 11/27/2023] [Indexed: 11/29/2023]
Abstract
Four kinds of spinel NiAl2O4were synthesized by the polyacrylamide gel method using Al2(SO4)3·18H2O and Al(NO3)3·9H2O as aluminum salts and anhydrous NiSO4and NiSO4·6H2O as nickel salts. The effects of different aluminum salts and nickel salts on the structure, optical and photocatalytic activity of spinel NiAl2O4were confirmed by various characterizations. There is no NiO impurity in the spinel NiAl2O4synthesized with Al2(SO4)3·18H2O as aluminum salt, while NiAl2O4, NiO and C-O functional group coexist in the target product with Al(NO3)3·9H2O as aluminum salt, and C-O functional group and NiO inhibits the photocatalytic activity of the system. Based on photocatalytic experiment, response surface methodology and free radical verification experiment, the influence of experimental parameters including synthesis pathway, initial drug concentration, initialpHand catalyst content on the photocatalytic activity of spinel NiAl2O4and the main active species involved in the reaction were investigated. The degradation percentage of spinel NiAl2O4synthesized with Al2(SO4)3·18H2O as aluminum salt and NiSO4·6H2O as nickel salt was 86.3% at the initial concentration of 50 mg l-1,pH= 5.33 and catalyst content of 1 g l-1. The mechanism investigation confirmed that the C-O functional group plays the dual role of impurity level and electron transfer in the degradation of tetracycline hydrochloride by spinel NiAl2O4.
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Affiliation(s)
- Xinmiao Yu
- School of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing, Wanzhou 404000, People's Republic of China
| | - Shifa Wang
- School of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing, Wanzhou 404000, People's Republic of China
| | - Hui Xie
- School of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing, Wanzhou 404000, People's Republic of China
| | - Zao Yi
- Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
| | - Jinlong Tang
- School of Mathematics and Physics, Southwest University of Science and Technology, Mianyang 621010, People's Republic of China
| | - Huajing Gao
- School of Science, Chongqing University of Posts and Telecommunications, Nan'an District, Chongqing 400065, People's Republic of China
| | - Hua Yang
- School of Science, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
| | - Leiming Fang
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Sichuan, Mianyang 621900, People's Republic of China
| | - Asad Syed
- Department of Botany and Microbiology, College of Science, King Saud University, PO 2455, Riyadh 11451, Saudi Arabia
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Lei Z, Alwan M, Alamir HTA, Alkaaby HHC, Farhan SS, Awadh SA, Altimari US, Al-Baghdady HFA, Kadhim AA, Qasim MT, Adhab AH, Nekuei A. Detection of abemaciclib, an anti-breast cancer agent, using a new electrochemical DNA biosensor. Front Chem 2022; 10:980162. [PMID: 36339035 PMCID: PMC9635563 DOI: 10.3389/fchem.2022.980162] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 09/20/2022] [Indexed: 11/25/2022] Open
Abstract
Detection of DNA molecules and possible chemotherapy-induced changes in its structure has been the goal of researchers using rapid, sensitive and inexpensive approaches. Therefore, the aim of this study was to fabricate a new electrochemical DNA biosensor using pencil graphite electrodes modified with polypyrrole/Ce doped hexagonal nickel oxide nanodisks or PP/Ce-doped H-NiO-ND composites for determination of Abemaciclib (AMC) and ds-DNA molecules. The DNA biosensor was prepared by immobilizing ds-DNA on the surface of PP/Ce-doped H-NiO-ND/PGE. Differential pulse voltammetry (DPV) was used to electrochemically detect AMC. The results elucidate the extremely high sensitivity of the ds-DNA/PP/Ce-doped H-NiO-ND/PGE biosensor to AMC, with a narrow detection limit of 2.7 nM and a lengthy linear range of 0.01–600.0 μM. The admirable performance of as-fabricated biosensor could be related to the active reaction sites and the unique electrochemical response related to the nanocomposites by enhancing ds-DNA stabilization and accelerating electron transfer on the surface of electrode.
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Affiliation(s)
- Zimeng Lei
- School of International Education, Beijing University of Chemical Technology, Beijing, China
- *Correspondence: Zimeng Lei, ; Abuzar Nekuei,
| | - Merim Alwan
- Medical Lab. Techniques Department, College of Medical Technology, Al-Farahidi University, Baghdad, Iraq
| | | | | | | | - Sura A. Awadh
- Department of Anesthesia, Al-mustaqbal University, Babylon, Iraq
| | | | | | - Athmar Ali Kadhim
- Medical Laboratories Teachniques, Hilla University College Babylon, Babylon, Iraq
| | - Maytham T. Qasim
- Department of Anesthesia, College of Health and Medical Technology, Al-Ayen University, Thi-Qar, Iraq
| | - Ali Hussein Adhab
- Department of Medical Laboratory Technics, Al-Zahrawi University College, Karbala, Iraq
| | - Abuzar Nekuei
- Islamic Azad University of South Tehran Branch, Tehran, Iran
- *Correspondence: Zimeng Lei, ; Abuzar Nekuei,
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