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Mohammad NN. Carbon Dots from Tire Waste for the Photodegradation of Methyl Orange Dye, Antimicrobial Activity, and Molecular Docking Study. Chem Biodivers 2023; 20:e202301358. [PMID: 37867143 DOI: 10.1002/cbdv.202301358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/20/2023] [Accepted: 10/22/2023] [Indexed: 10/24/2023]
Abstract
In this study, solvothermal pathway was employed for the synthesis of P, N codoped C-dot using tire waste as a sustainable source of carbon and nitrogen. Comprehensive analyses encompassing X-ray diffraction (XRD) analysis, Transmission Electron Microscopy (TEM), FT-IR, cyclic voltammetry, and UV-Vis spectra were used to assess the crystalline structure, purity, size, fluorescence up-conversion, and morphological attributes of the nanomaterial. Subsequently, the produced C-dots were evaluated for their efficacy in the photocatalytic degradation of methylene blue and methyl orange dyes, demonstrating notable success in degrading methyl orange dye within eight hours in the visible region. Furthermore, the same nanomaterial was applied for carrying out agar disk-diffusion assays against a spectrum of microorganisms. Results revealed substantial inhibition zones against Methicillin-Resistant Staphylococcus aureus (MRSA), Escherichia coli, and Pseudomonas aeruginosa. Elucidating the antimicrobial mechanism, molecular-docking simulations were excuted using on AutoDock Vina with designated ligands. The results indicated a strong binding affinity of the C-dots with certain proteins associated with antibacterial activity. This observation suggests that the synthesized C-dots effectively engage with the active sites of these proteins, indicating their potential as promising antibacterial agents. Importantly, this study implies that C-dots do not induce protein denaturation, thereby warranting further investigation of their utility as antibacterial agents.
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Affiliation(s)
- Nian N Mohammad
- University of Sulaimani, College of Science, Department of Chemistry
- Komar University of Science and Technology, Department of Medical Laboratory Science
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He J, Han L, Ma W, Chen L, Ma C, Xu C, Yang Z. Efficient photodegradation of polystyrene microplastics integrated with hydrogen evolution: Uncovering degradation pathways. iScience 2023; 26:106833. [PMID: 37250789 PMCID: PMC10220245 DOI: 10.1016/j.isci.2023.106833] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/03/2023] [Accepted: 05/04/2023] [Indexed: 05/31/2023] Open
Abstract
Photocatalytic microplastics (MPs) conversion into valuable products is a promising approach to alleviate MPs pollution in aquatic environments. Herein, we developed an amorphous alloy/photocatalyst composite (FeB/TiO2) that can successfully convert polystyrene (PS) MPs to clean H2 fuel and valuable organic compounds (92.3% particle size reduction of PS-MPs and 103.5 μmol H2 production in 12 h). FeB effectively enhanced the light-absorption and carrier separation of TiO2, thereby promoting more reactive oxygen species generation (especially ‧OH) and combination of photoelectrons with protons. The main products (e.g., benzaldehyde, benzoic acid, etc.) were identified. Additionally, the dominant PS-MPs photoconversion pathway was elucidated based on density functional theory calculations, by which the significant role of ‧OH was demonstrated in combination with radical quenching data. This study provides a prospective approach to mitigate MPs pollution in aquatic environments and reveals the synergistic mechanism governing the photocatalytic conversion of MPs and generation of H2 fuel.
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Affiliation(s)
- Jiehong He
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Lanfang Han
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Weiwei Ma
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Liying Chen
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Chuanxin Ma
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Chao Xu
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Zhifeng Yang
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
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Al-Wasidi AS, Naglah AM, Saad FA, Abdelrahman EA. Modification of sodium aluminum silicate hydrate by thioglycolic acid as a new composite capable of removing and preconcentrating Pb(II), Cu(II), and Zn(II) ions from food and water samples. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Wen Y, Yang J, Zou H, Fan Y, Li J, Kuang Y, Liu W, Zhang K, Xiong L. 2D TiVCT x layered nanosheets grown on nickel foam as highly efficient electrocatalysts for the hydrogen evolution reaction. RSC Adv 2022; 12:23584-23594. [PMID: 36090412 PMCID: PMC9386690 DOI: 10.1039/d2ra03791b] [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: 06/20/2022] [Accepted: 08/05/2022] [Indexed: 11/21/2022] Open
Abstract
Exploring highly efficient and durable catalysts for the hydrogen evolution reaction (HER) is crucial for the hydrogen economy and environmental protection issues. Numerous studies have now found that transition metal carbide MXenes are ideal candidates as catalysts for the hydrogen evolution reaction. However, MXenes are inclined to easily undergo lamellar structure agglomeration and stacking, which impedes their further applications. Besides, most of the extant research has focused on single transition metal carbides, and the investigation of double transition metal carbide MXenes is rather rare. In this research work, a three-dimensional (3D) TiVCTx-based conductive electrode was constructed by depositing 2D TiVCTx nanosheets on 3D network structured nickel foam (NF) to synthesize a hybrid electrode material (abbreviated as TiVCTx@NF). TiVCTx@NF exhibits efficient electrochemical properties with a low overpotential of 151 mV at 10 mA cm−2 and a small Tafel slope of 116 mV dec−1. Benefitting from the open layer structure and strong interfacial coupling effect, compared to the pristine structure, the resulting TiVCTx@NF has greatly increased active sites for the hydrogen evolution reaction (HER) and encounters less resistance for charge transfer. In addition, TiVCTx@NF exhibits better stability in long-term acidic electrolytes. This work provides a tactic to prepare three-dimensional network electrode materials and broadens the application of single transition metal carbide MXenes as water splitting electrodes in the HER, which is beneficial to the application of noble metal-free electrocatalysts. The TiVCTx MXene was obtained by etching and peeling methods, and the TiVCTx@NF hybrid electrode material was obtained by the deposition method. The electrochemical performance was evaluated using a variety of characterization methods.![]()
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Affiliation(s)
- Yi Wen
- School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan, 430023, Hubei, China
| | - Junsheng Yang
- School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan, 430023, Hubei, China
| | - Haoran Zou
- School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan, 430023, Hubei, China
| | - Yiquan Fan
- School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan, 430023, Hubei, China
| | - Jie Li
- School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan, 430023, Hubei, China
| | - Yijian Kuang
- School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan, 430023, Hubei, China
| | - Wenkang Liu
- School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan, 430023, Hubei, China
| | - Kaisong Zhang
- School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan, 430023, Hubei, China
| | - Lieqiang Xiong
- School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan, 430023, Hubei, China
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