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Tasisa YE, Sarma TK, Sahu TK, Krishnaraj R. Phytosynthesis and characterization of tin-oxide nanoparticles (SnO 2-NPs) from Croton macrostachyus leaf extract and its application under visible light photocatalytic activities. Sci Rep 2024; 14:10780. [PMID: 38734791 PMCID: PMC11088712 DOI: 10.1038/s41598-024-60633-2] [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: 01/26/2024] [Accepted: 04/25/2024] [Indexed: 05/13/2024] Open
Abstract
Nanotechnology is rapidly becoming more and more important in today's technological world as the need for industry increases with human well-being. In this study, we synthesized SnO2 nanoparticles (NPs) using an environmentally friendly method or green method from Croton macrostachyus leaf extract, leading to the transformation of UV absorbance to visible absorbance by reducing the band gap energy. The products underwent UV, FTIR, XRD, SEM, EDX, XPS, BET, and DLS for characterization. Characterization via UV-Vis spectroscopy confirmed the shift in absorbance towards the visible spectrum, indicating the potential for enhanced photocatalytic activity under visible light irradiation. The energy band gap for as-synthesized nanoparticles was 3.03 eV, 2.71 eV, 2.61 eV, and 2.41 eV for the 1:1, 1:2, 1:3, and 1:4 sample ratios, respectively. The average crystal size of 32.18 nm and very fine flakes with tiny agglomerate structures of nanoparticles was obtained. The photocatalytic activity of the green-synthesized SnO2 nanoparticles was explored under visible light irradiation for the degradation of rhodamine B (RhB) and methylene blue (MB), which were widespread fabric pollutants. It was finally confirmed that the prepared NPs were actively used for photocatalytic degradation. Our results suggest the promising application of these green-synthesized SnO2 NPs as efficient photocatalysts for environmental remediation with low energy consumption compared to other light-driven processes. The radical scavenging experiment proved that hydroxyl radicals (_OH) are the predominant species in the reaction kinetics of both pollutant dyes under visible light degradation.
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Affiliation(s)
- Yonas Etafa Tasisa
- Department of Physics, College of Natural and Computational Sciences, Wollega University, Nekemte, Ethiopia
- Department of Chemistry, Indian Institute of Technology Indore, Indore, 453552, Madhya Pradesh, India
| | - Tridib Kumar Sarma
- Department of Chemistry, Indian Institute of Technology Indore, Indore, 453552, Madhya Pradesh, India
| | - Tarun Kumar Sahu
- Department of Chemistry, Indian Institute of Technology Indore, Indore, 453552, Madhya Pradesh, India
| | - Ramaswamy Krishnaraj
- Department of Mechanical Engineering, College of Engineering and Technology, Dambi Dollo University, Dembi Dolo, Ethiopia.
- Center for Global Health Research, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India.
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Moja MM, Mapossa AB, Chirwa EMN, Tichapondwa S. Photocatalytic degradation of 2,4-dichlorophenol using nanomaterials silver halide catalysts. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:11857-11872. [PMID: 38224437 PMCID: PMC10869396 DOI: 10.1007/s11356-024-31921-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 01/04/2024] [Indexed: 01/16/2024]
Abstract
In this study, the photocatalytic activity of nanomaterials Ag/AgX (X = Cl, Br, I) is reported. Highly efficient silver halide (Ag/AgX where X = Cl, Br, I) photocatalysts were synthesized through a hydrothermal method. The samples were characterized using a range of techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) to check their structural, morphology, textural and optical properties. In addition, the photocatalytic activity of photocatalysts was evaluated through the degradation of 2,4-dichlorophenol (2,4-DCP) under UV and visible light irradiation. XRD analysis confirmed the presence of a single-phase structure (pure phase) in the synthesized photocatalysts. SEM micrographs showed agglomeration with a non-uniform distribution of particles, which is a characteristic of surfactant-free precipitation reactions in aqueous media. The Ag/AgBr photocatalyst exhibited the best degradation efficiency, resulting in 83.37% and 89.39% photodegradation after 5 h of UV and visible light irradiation, respectively. The effect of catalyst loading, initial solution pH, and 2,4-DCP concentration was investigated for the best-performing Ag/AgBr photocatalyst. The degradation kinetics were best described by the pseudo-first-order Langmuir-Hinshelwood model. The photocatalytic capacity of Ag/AgBr decreased by 50% after five reuse cycles. SEM images revealed heightened levels of photodegradation on the catalyst surface. The study proved the feasibility of using simple synthesis methods to produce visible light active photocatalysts capable of degrading refractory phenolic pollutants in aqueous systems.
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Affiliation(s)
- Mahlako Mary Moja
- Department of Chemical Engineering, University of Pretoria, Pretoria, 0002, South Africa
| | - António Benjamim Mapossa
- Department of Chemical Engineering, University of Pretoria, Pretoria, 0002, South Africa.
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada.
| | | | - Shepherd Tichapondwa
- Department of Chemical Engineering, University of Pretoria, Pretoria, 0002, South Africa
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Yousefi F, Haghighi M, Shabani M. Potato-on-rod like of Z-scheme plasmon Ag 2CrO 4-Ag 2Mo 2O 7 heterojunction nanophotocatalyst with high stability and accelerated photo-degradation evolution of organic contaminants. ENVIRONMENTAL RESEARCH 2023; 236:116853. [PMID: 37567378 DOI: 10.1016/j.envres.2023.116853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/25/2023] [Accepted: 08/07/2023] [Indexed: 08/13/2023]
Abstract
The shocking increase of resistant dye pollutants in the environment and their harmful effects has become a potential threat to the ecosystem. In the current work, the novel and highly efficient potato-on-rod-like Z-scheme plasmon Ag2CrO4-Ag2Mo2O7 heterojunction nano-photocatalyst was synthesized by precipitation method to photodegrade different organic dyes under artificial sunlight. The required analysises were carried out to characterize nanophotocatalysts. FESEM and TEM results showed the placement way of potato-like Ag2CrO4 between/on rod-like Ag2Mo2O7 which was leading to suitable structure and surface morphology. Besides, the morphology observations released the meso-/macroporous potato-on-rod like architecture self-assembled by nanoparticles. DRS analysis also confirmed two band gap energies of 2.55 and 1.72 eV in Ag2CrO4-Ag2Mo2O7 (3:1) resulting from forming a heterojunction structure and the plasmon Ag. Ag2CrO4-Ag2Mo2O7 (3:1) nanophotocatalyst exhibited the most remarkable activity in the photodegradation of 10 mg/L 2-naphthol orange (97.8%), 10 mg/L rhodamine B (99.7%), 10 mg/L crystal violet (98.9%), and 10 mg/L methyl orange (56.1%) with a catalyst dosage of 0.1 gr for about 90 min. The appropriate energy band gap, the formation of the heterostructure, the presence of meso (0.0038 cm3/g) and macro (0.0044 cm3/g) holes, and pore diameter at about 17.2 nm based on BET-BJH analysis that facilitated the penetration of pollutant molecules, increased pollutant adsorption and demonstrated stunning capability of efficient light harvesting, the reason was electron-hole pairs recombination rate reduction. Moreover, the fabricated samples showed tremendous catalyst constancy and reusability even after the fourth run. Results have shown the remarkable photocatalytic activity under visible light and provide an environment-friendly and green strategy to overcome the challenges of organic pollutants present in aqueous solutions.
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Affiliation(s)
- Fatemeh Yousefi
- Chemical Engineering Faculty, Sahand University of Technology, P.O.Box 51335-1996, Sahand New Town, Tabriz, Iran; Reactor and Catalysis Research Center (RCRC), Sahand University of Technology, P.O.Box 51335-1996, Sahand New Town, Tabriz, Iran
| | - Mohammad Haghighi
- Chemical Engineering Faculty, Sahand University of Technology, P.O.Box 51335-1996, Sahand New Town, Tabriz, Iran; Reactor and Catalysis Research Center (RCRC), Sahand University of Technology, P.O.Box 51335-1996, Sahand New Town, Tabriz, Iran.
| | - Maryam Shabani
- Chemical Engineering Faculty, Sahand University of Technology, P.O.Box 51335-1996, Sahand New Town, Tabriz, Iran; Reactor and Catalysis Research Center (RCRC), Sahand University of Technology, P.O.Box 51335-1996, Sahand New Town, Tabriz, Iran
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Qi H, Wu M, Wang J, Zhang B, Dai C, Teng F, Zhao M, He L. Visible‐Light‐Driven LaFeO
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/CdS Heterojunction Photocatalysts for Photo‐Fenton Degradation of Levofloxacin. ChemistrySelect 2023. [DOI: 10.1002/slct.202204121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Affiliation(s)
- Huixiu Qi
- School of Chemistry and Chemical Engineering Southeast University 2 Southeast University Road, Jiangning District Nanjing City 211189 China
| | - Min Wu
- School of Chemistry and Chemical Engineering Southeast University 2 Southeast University Road, Jiangning District Nanjing City 211189 China
| | - Jun Wang
- School of Chemistry and Chemical Engineering Southeast University 2 Southeast University Road, Jiangning District Nanjing City 211189 China
| | - Bingjie Zhang
- School of Chemistry and Chemical Engineering Southeast University 2 Southeast University Road, Jiangning District Nanjing City 211189 China
| | - Chaohua Dai
- School of Chemistry and Chemical Engineering Southeast University 2 Southeast University Road, Jiangning District Nanjing City 211189 China
| | - Fukang Teng
- School of Chemistry and Chemical Engineering Southeast University 2 Southeast University Road, Jiangning District Nanjing City 211189 China
| | - Min Zhao
- School of Chemistry and Chemical Engineering Southeast University 2 Southeast University Road, Jiangning District Nanjing City 211189 China
| | - Lin He
- School of Chemistry and Chemical Engineering Southeast University 2 Southeast University Road, Jiangning District Nanjing City 211189 China
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Huang H, Wang HL, Jiang WF. In-situ synthesis of novel dual S-scheme AgI/Ag 6Mo 7O 24/g-C 3N 4 heterojunctions with tandem structure for photocatalytic degradation of organic pollutants. CHEMOSPHERE 2023; 318:137812. [PMID: 36642140 DOI: 10.1016/j.chemosphere.2023.137812] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 01/01/2023] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
The controllable design of multivariate heterojunction with sequential structures is of significant relevance for breaking the performance limit of binary composite photocatalysts. In this work, the novel dual S-scheme ternary-component AgI/Ag6Mo7O24/exfoliated g-C3N4 (ECN) composite was prepared by a two-step in-situ synthetic strategy. The energy band bending at the heterointerface and the formation of dual built-in electric field could be observed due to distinct work functions of different components in the ternary composite. Benefiting from the sequential heterojunction structure, the AgI/Ag6Mo7O24/ECN composite achieved 98.7% removal efficiency of 2-nitrophenol (2-NP) within 70 min under visible light irradiation, and AgI/Ag6Mo7O24/ECN also showed higher degradation efficiency for a variety of organic pollutants such as methylene blue (MB), rhodamine B (RhB), methyl orange (MO), 4-nitrophenol (4-NP), 2-sec-butyl-4,6-dinitrophenol (DNBP) and tetracycline (TC). Notably, •OH and •O2- played dominant roles in the AgI/Ag6Mo7O24/ECN set up, which was consistent with the dual S-scheme charge transfer mechanism. In-depth insights for the photodegradation of 2-NP were presented based on a combined DFT study and GC-MS analysis. Additionally, the photoreduction of Ag+ in AgI/Ag6Mo7O24/ECN was also evaded by the fast transfer of photogenerated electrons through the dual S-scheme pathway, achieving the effect of killing two birds with one stone.
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Affiliation(s)
- Hao Huang
- Department of Chemistry, Dalian University of Technology, Dalian 116023, China
| | - Hui-Long Wang
- Department of Chemistry, Dalian University of Technology, Dalian 116023, China.
| | - Wen-Feng Jiang
- Department of Chemistry, Dalian University of Technology, Dalian 116023, China.
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In-situ fabrication of AgI/AgnMoxO3x+n/2/g-C3N4 ternary composite photocatalysts for benzotriazole degradation: Tuning the heterostructure, photocatalytic activity and photostability by the degree of molybdate polymerization. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Samad A, Furukawa M, Tateishi I, Katsumata H, Kaneco S. Highly efficient visible light-induced photocatalytic oxidation of arsenite with nanosized WO 3 particles in the presence of Cu 2+ and CuO. ENVIRONMENTAL TECHNOLOGY 2022:1-12. [PMID: 35262453 DOI: 10.1080/09593330.2022.2051607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 02/19/2022] [Indexed: 06/14/2023]
Abstract
Although WO3 appears to be one of the extensively studied photocatalysts, the low response of pure WO3 in aqueous solution under visible light limits its application remarkably. In this work, the enhancement of the efficiency of WO3 for the visible light-driven photocatalytic oxidation of arsenite was explored using Cu2+ ion and CuO as a co-catalyst. While the addition of Cu2+ was found effective for the suppression of dissolution of WO3, the efficiency of CuO appeared to be slightly lower. Significant improvement of the efficiency for the photocatalytic oxidation of As(III) with WO3 was noted when Cu2+ ions and CuO were added. The optimized conditions were WO3 in the presence of 10 mg L-1 Cu2+ ion and 1 wt% CuO coupled with WO3, respectively. The As(III) concentration of 10 mg L-1 could be lowered to less than 0.1 mg L-1 by the photocatalytic treatment. Acidic pH favours the oxidation of arsenite in the presence of Cu2+ whereas basic pH is suitable with CuO. Characterization techniques such as TEM, XPS, XRD and UV-DRS were used to characterize photocatalysts. The reactive species scavenger tests revealed that the photo-induced holes (h+) play a key role in the photocatalytic oxidation process while the effect of •OH is negligible. It was found that As(III) oxidation rate was remarkably suppressed in the nitrogen atmosphere. A mechanism for enhanced photocatalytic oxidation has been proposed based on the results of the reactive species scavenger tests. This research may contribute to the large-scale As(III) oxidation treatment in the groundwater.
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Affiliation(s)
- Abdus Samad
- Department of Chemistry, Jagannath University, Dhaka, Bangladesh
| | - Mai Furukawa
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
| | - Ikki Tateishi
- Mie Global Environment Centre for Education & Research, Mie University, Tsu, Japan
| | - Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
- Mie Global Environment Centre for Education & Research, Mie University, Tsu, Japan
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Recent advances on silver-based photocatalysis: Photocorrosion inhibition, visible-light responsivity enhancement, and charges separation acceleration. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120194] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Huang K, Hu T, Wang Y. Enhanced photocatalytic degradation of methylene blue through synthesizing of novel of BiVO4/Zn2SnO4 under visible light. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2020.121864] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Della Rocca DG, Peralta RM, Peralta RA, Peralta Muniz Moreira RDF. Recent development on Ag2MoO4-based advanced oxidation processes: a review. REACTION KINETICS MECHANISMS AND CATALYSIS 2021. [DOI: 10.1007/s11144-021-01934-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Goulas A, Chi-Tangyie G, Wang D, Zhang S, Ketharam A, Vaidhyanathan B, Reaney IM, Cadman DA, Whittow WG, Vardaxoglou J(YC, Engstrøm DS. Additively manufactured ultra-low sintering temperature, low loss Ag2Mo2O7 ceramic substrates. Ann Ital Chir 2021. [DOI: 10.1016/j.jeurceramsoc.2020.08.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Yang X, Zhang X, Wu T, Gao P, Zhu G, Fan J. Novel approach for preparation of three-dimensional BiOBr/BiOI hybrid nanocomposites and their removal performance of antibiotics in water. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125344] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Liu Z, Ma Z. Promoting the photocatalytic activity of Bi 4Ti 3O 12 microspheres by incorporating iron. RSC Adv 2020; 10:19232-19239. [PMID: 35515437 PMCID: PMC9054072 DOI: 10.1039/d0ra03305g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 05/08/2020] [Indexed: 11/25/2022] Open
Abstract
Small amounts of Fe(NO3)3 were added to the synthesis mixture prior to the hydrothermal synthesis of Bi4Ti3O12 microspheres. The physicochemical properties of the resulting materials were changed accordingly. The photocatalytic activities of several samples were studied through the photocatalytic degradation of organic pollutants. The samples with a theoretical Fe atomic percentage of 5.9% showed the highest photocatalytic activity among these samples. The main active species in photocatalytic degradation was demonstrated by radical capturing experiments as h+. The introduction of a suitable amount of Fe to the photocatalyst can facilitate the separation of electron–hole pairs generated upon light irradiation, inhibit their recombination efficiently, and prominently expand the light absorption region, thus leading to higher photocatalytic activity. Small amounts of Fe(NO3)3 were added to the synthesis mixture prior to the hydrothermal synthesis of Bi4Ti3O12 microspheres.![]()
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Affiliation(s)
- Zhendong Liu
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University Shanghai 200433 P. R. China
| | - Zhen Ma
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University Shanghai 200433 P. R. China.,Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 P. R. China
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Unvealing the role of β-Ag 2MoO 4 microcrystals to the improvement of antibacterial activity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 111:110765. [PMID: 32279798 DOI: 10.1016/j.msec.2020.110765] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 01/14/2020] [Accepted: 02/18/2020] [Indexed: 12/29/2022]
Abstract
Crystal morphology with different surfaces is important for improving the antibacterial activity of materials. In this experimental and theoretical study, the antibacterial activity of β-Ag2MoO4 microcrystals against the Gram-positive bacteria, namely, methicillin-resistant Staphylococcus aureus (MRSA), and the Gram-negative bacteria, namely, Escherichia coli (E. coli), was investigated. In this study, β-Ag2MoO4 crystals with different morphologies were synthetized by a simple co-precipitation method using three different solvents. The antimicrobial efficacy of the obtained microcrystals against both bacteria increased according to the solvent used in the following order: water < ammonia < ethanol. Supported by experimental evidence, a correlation between morphology, surface energy, and antibacterial performance was established. By using the theoretical Wulff construction, which was obtained by means of density functional calculations, the morphologies with large exposition of the (001) surface exhibited superior antibacterial activity. This study provides a low cost route for synthesizing β-Ag2MoO4 crystals and a guideline for enhancing the biological effect of biocides on pathogenic bacteria by the morphological modulation.
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