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Gadore V, Mishra SR, Ahmaruzzaman M. Green and environmentally sustainable fabrication of SnS 2 quantum dots/chitosan nanocomposite for enhanced photocatalytic performance: Effect of process variables, and water matrices. JOURNAL OF HAZARDOUS MATERIALS 2023; 444:130301. [PMID: 36403450 DOI: 10.1016/j.jhazmat.2022.130301] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 10/17/2022] [Accepted: 10/30/2022] [Indexed: 05/27/2023]
Abstract
Concerns over the availability of clean water and the quality of treated wastewater are significant problems that call for an appropriate solution to improve the water quality. The present work emphasized the synthesis of novel SnS2 quantum dots (QDs) deposited on chitosan via a facile green precipitation method involving neem (Azadirachta indica) leaf extract and investigating its photocatalytic performance for the degradation of Crystal violet (CV) dye under varying reaction parameters, other organic and inorganic salts and water matrices. The crystal structure, surface morphology, and elemental composition of the prepared SnS2 (QDs)/Ch composite were evaluated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) and energy dispersive X-ray analysis (EDAX) techniques. The average size of SnS2/Chitosan nanoparticles was calculated to be 8.8 nm using XRD, with the average diameter of SnS2 QDs to be 3.3 nm from TEM. UV-visible spectroscopy was used to investigate its optical properties. The direct band gap of SnS2/Chitosan estimated from Tauc's plot came to be 2.5 eV. The prepared novel SnS2/Ch composite showed outstanding photocatalytic activity for the degradation of CV through the Advanced Oxidation Process (AOP). The fabricated photocatalyst caused 98.60 ± 1.34 % degradation of CV within a short period of 70 min under optimum conditions. The photodegradation reaction followed pseudo-first-order rate kinetics with a rate constant of 0.0815 min-1. Furthermore, the photocatalyst showed high stability and was reusable for up to four cycles. The present work fulfils the aim of designing a novel, green, and efficient visible light-active nano-photocatalyst.
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Affiliation(s)
- Vishal Gadore
- Department of Chemistry, National Institute of Technology Silchar, 788010 Assam, India
| | - Soumya Ranjan Mishra
- Department of Chemistry, National Institute of Technology Silchar, 788010 Assam, India
| | - Md Ahmaruzzaman
- Department of Chemistry, National Institute of Technology Silchar, 788010 Assam, India.
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Ibrahim MAA, Mahmoud AHM, Mekhemer GAH, Shawky AM, Soliman MES, Moussa NAM. Adsorption Behavior of Toxic Carbon Dichalcogenides (CX 2; X = O, S, or Se) on β12 Borophene and Pristine Graphene Sheets: A DFT Study. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3411. [PMID: 36234539 PMCID: PMC9565509 DOI: 10.3390/nano12193411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 09/21/2022] [Accepted: 09/23/2022] [Indexed: 05/27/2023]
Abstract
The adsorption of toxic carbon dichalcogenides (CX2; X = O, S, or Se) on β12 borophene (β12) and pristine graphene (GN) sheets was comparatively investigated. Vertical and parallel configurations of CX2⋯β12/GN complexes were studied herein via density functional theory (DFT) calculations. Energetic quantities confirmed that the adsorption process in the case of the parallel configuration was more desirable than that in the vertical analog and showed values up to −10.96 kcal/mol. The strength of the CX2⋯β12/GN complexes decreased in the order CSe2 > CS2 > CO2, indicating that β12 and GN sheets showed significant selectivity for the CSe2 molecule with superb potentiality for β12 sheets. Bader charge transfer analysis revealed that the CO2⋯β12/GN complexes in the parallel configuration had the maximum negative charge transfer values, up to −0.0304 e, outlining the electron-donating character of CO2. The CS2 and CSe2 molecules frequently exhibited dual behavior as electron donors in the vertical configuration and acceptors in the parallel one. Band structure results addressed some differences observed for the electronic structures of the pure β12 and GN sheets after the adsorption process, especially in the parallel configuration compared with the vertical one. According to the results of the density of states, new peaks were observed after adsorbing CX2 molecules on the studied 2D sheets. These results form a fundamental basis for future studies pertaining to applications of β12 and GN sheets for detecting toxic carbon dichalcogenides.
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Affiliation(s)
- Mahmoud A. A. Ibrahim
- Computational Chemistry Laboratory, Chemistry Department, Faculty of Science, Minia University, Minia 61519, Egypt
- School of Health Sciences, University of KwaZulu-Natal, Westville, Durban 4000, South Africa
| | - Amna H. M. Mahmoud
- Computational Chemistry Laboratory, Chemistry Department, Faculty of Science, Minia University, Minia 61519, Egypt
| | - Gamal A. H. Mekhemer
- Computational Chemistry Laboratory, Chemistry Department, Faculty of Science, Minia University, Minia 61519, Egypt
| | - Ahmed M. Shawky
- Science and Technology Unit (STU), Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Mahmoud E. S. Soliman
- Molecular Bio-Computation and Drug Design Research Laboratory, School of Health Sciences, University of KwaZulu-Natal, Westville, Durban 4000, South Africa
| | - Nayra A. M. Moussa
- Computational Chemistry Laboratory, Chemistry Department, Faculty of Science, Minia University, Minia 61519, Egypt
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Salloum S, Bendt G, Heidelmann M, Loza K, Bayesteh S, Sepideh Izadi M, Kawulok P, He R, Schlörb H, Perez N, Reith H, Nielsch K, Schierning G, Schulz S. Influence of Nanoparticle Processing on the Thermoelectric Properties of (Bi x Sb 1-X ) 2 Te 3 Ternary Alloys. ChemistryOpen 2021; 10:189-198. [PMID: 33492752 PMCID: PMC7874259 DOI: 10.1002/open.202000257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 12/12/2020] [Indexed: 01/09/2023] Open
Abstract
The synthesis of phase-pure ternary solutions of tetradymite-type materials (Bix Sb1-x )2 Te3 (x=0.25; 0.50; 0.75) in an ionic liquid approach has been carried out. The nanoparticles are characterized by means of energy-dispersive X-ray spectroscopy (EDX), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and transmission electron microscopy. In addition, the role of different processing approaches on the thermoelectric properties - Seebeck coefficient as well as electrical and thermal conductivity - is demonstrated.
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Affiliation(s)
- Sarah Salloum
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (Cenide)University of Duisburg-EssenUniversitätsstraße 5–745117EssenGermany
| | - Georg Bendt
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (Cenide)University of Duisburg-EssenUniversitätsstraße 5–745117EssenGermany
| | - Markus Heidelmann
- Interdisciplinary Center for Analytics on the Nanoscale (ICAN)NETZUniversity of Duisburg-EssenCarl-Benz-Str. 19947047DuisburgGermany
| | - Kateryna Loza
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (Cenide)University of Duisburg-EssenUniversitätsstraße 5–745117EssenGermany
| | - Samaneh Bayesteh
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
- Institute of Applied PhysicsDresden University of Technology01069DresdenGermany
| | - M. Sepideh Izadi
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
- Institute of Applied PhysicsDresden University of Technology01069DresdenGermany
| | - Patrick Kawulok
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
| | - Ran He
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
| | - Heike Schlörb
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
| | - Nicolas Perez
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
| | - Heiko Reith
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
| | - Kornelius Nielsch
- Institute for Metallic MaterialsLeibniz Institute for Solid State and Materials Research DresdenHelmholtzstrasse 2001069DresdenGermany
- Institute of Applied PhysicsDresden University of Technology01069DresdenGermany
- Institute of Materials ScienceDresden University of Technology01069DresdenGermany
| | | | - Stephan Schulz
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (Cenide)University of Duisburg-EssenUniversitätsstraße 5–745117EssenGermany
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Ahmad W, Khan A, Ali N, Khan S, Uddin S, Malik S, Ali N, Khan H, Khan H, Bilal M. Photocatalytic degradation of crystal violet dye under sunlight by chitosan-encapsulated ternary metal selenide microspheres. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:8074-8087. [PMID: 33048294 DOI: 10.1007/s11356-020-10898-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 09/16/2020] [Indexed: 06/11/2023]
Abstract
Organic dyes that are extensively released in wastewater from various industries remain the priority concern in the modern world. Therefore, a novel catalyst, bismuth-iron selenide, was prepared through the solvothermal process for photocatalytic degradation of a carcinogenic crystal violet dye. The catalyst was supported with chitosan to form iron-bismuth selenide-chitosan microspheres (BISe-CM). The synthesized catalyst was composed of iron, bismuth, and selenium in a definite proportion based on EDX analysis. FTIR analysis confirmed the synthesis of BISe-CM from characteristic bands of metal selenium bond as well as the typical bands of chitosan. SEM analysis illustrated the average diameter of the barren catalyst to be 54.8 nm, while the average size of the microspheres was 982.5 um. The BISe-CM has the surface of a pore with an average size of 0.5 um. XRD analysis revealed that the synthesized catalyst was composed of Fe3Se4 and Bi2Se3. The prepared catalyst showed better degradation efficiency for crystal violet dye at optimized conditions under solar irradiation. Employing 0.2 g of BISe-CM resulted in complete degradation for 30 ppm of crystal violet dye in 150 min at pH 8.0. The reusability of the catalyst up to four consecutive times makes it a more attractive and practical candidate. Moreover, the catalyst followed pseudo-first-order kinetics in the decontamination of crystal violet. Conclusively, the novel photocatalyst showed the best decolorizing property of crystal violet under sunlight irradiation and could be a suitable alternative for dye decontamination from wastewater.
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Affiliation(s)
- Waqar Ahmad
- Institute of Chemical Sciences, University of Peshawar, Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan
| | - Adnan Khan
- Institute of Chemical Sciences, University of Peshawar, Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan.
| | - Nisar Ali
- Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, National & Local Joint Engineering Research Center for Deep Utilization Technology of Rock-salt Resource, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, 223003, China
| | - Sana Khan
- Institute of Chemical Sciences, University of Peshawar, Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan
| | - Salah Uddin
- Institute of Chemical Sciences, University of Peshawar, Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan
| | - Sumeet Malik
- Institute of Chemical Sciences, University of Peshawar, Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan
| | - Nauman Ali
- Institute of Chemical Sciences, University of Peshawar, Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan
| | - Hamayun Khan
- Department of Chemistry, Islamia College University, Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan
| | - Hammad Khan
- Department of Chemical Engineering, Faculty of Materials and Chemical Engineering, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Topi, Swabi, KP, Pakistan
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China.
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