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Le TTN, Truong HB, Thi Hoa L, Le HS, Tran TTT, Manh TD, Le VT, Dinh QK, Nguyen XC. Cu 2O/Fe 3O 4/UiO-66 nanocomposite as an efficient fenton-like catalyst: Performance in organic pollutant degradation and influencing factors based machinelearning. Heliyon 2023; 9:e20466. [PMID: 37810813 PMCID: PMC10556788 DOI: 10.1016/j.heliyon.2023.e20466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 09/26/2023] [Accepted: 09/26/2023] [Indexed: 10/10/2023] Open
Abstract
The persistent presence of organic pollutants like dyes in water environment necessitates innovative approaches for efficient degradation. In this research, we developed an advanced hybrid catalyst by combining metal oxides (Cu2O, Fe3O4) with UiO-66, serving as a heterogeneous Fenton catalyst for for efficient RB19 breakdown in water with H2O2. The control factors to the catalytic behavior were also quantified by machine learning. Experimental results show that the catalytic performance was much better than its individual components (P < 0.05 & non-zero 95% C.I). The improved catalytic efficiency was linked to the occurrence of active metal centers (Fe, Cu, and Zr), with Cu(I) from Cu2O playing a crucial role in promoting increased production of HO•. Also, UiO-66 served as a catalyst support, attracting pollutants to the reaction center, while magnetic Fe3O4 aids catalyst recovery. The optimal experimental parameters for best performance were pH at 7, catalyst loading of 1.6 g/L, H2O2 strength of 0.16 M, and reaction temperature of 25 °C. The catalyst can be magnetically separated and regenerated after five recycling times without significantly reducing catalytic activity. The reaction time and pH were ranked as the most influencing factors on catalytic efficiency via Random Forest and SHapley Additive exPlanations models. The findings show that developed catalyst is a suitable candidate to remove dyes in water by Fenton heterogeneous reaction.
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Affiliation(s)
- Thi Thanh Nhi Le
- Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam
- Faculty of Natural Sciences, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam
| | - Hai Bang Truong
- Optical Materials Research Group, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, Viet Nam
- Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Viet Nam
| | - Le Thi Hoa
- University of Sciences, Hue University, 77 Nguyen Hue, Hue, Viet Nam
| | - Hoang Sinh Le
- VN-UK Institute for Research and Executive Education, University of Danang, Danang city, Viet Nam
| | - Thanh Tam Toan Tran
- Institute of Applied Technology, Thu Dau Mot University, Thu Dau Mot city, Viet Nam
| | - Tran Duc Manh
- University of Danang, University of Science and Education, Da Nang, Viet Nam
| | - Van Thuan Le
- Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam
- Faculty of Natural Sciences, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam
| | - Quang Khieu Dinh
- University of Sciences, Hue University, 77 Nguyen Hue, Hue, Viet Nam
| | - Xuan Cuong Nguyen
- Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam
- Faculty of Natural Sciences, Duy Tan University, 03 Quang Trung, Da Nang, Viet Nam
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2
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Degradation of PAHs using TiO2 as a semiconductor in the heterogeneous photocatalysis process: A systematic review. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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3
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Ebrahimzadeh-Rajaei G. Removal of Reactive Yellow 145 Dye from Aqueous Solution by Photocatalytic and Sonocatalytic Degradation in the Presence of CuO Nanocatalyst. THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING 2022. [DOI: 10.1134/s0040579522060045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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4
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Baigorria E, Cano L, Sapag K, Alvarez V. Removal efficiency of As(III) from aqueous solutions using natural and Fe(III) modified bentonites. ENVIRONMENTAL TECHNOLOGY 2022; 43:3728-3741. [PMID: 34034622 DOI: 10.1080/09593330.2021.1934559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 05/13/2021] [Indexed: 06/12/2023]
Abstract
Contamination of water with arsenic is a major global health problem. The use of adsorbent materials for the removal of As from aqueous systems is a plausible solution to this problem. In this work, the use of commercial bentonites (purified and modified with iron (III)) for the removal of As from water was studied. The samples were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier Transformed Infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and nitrogen adsorption/desorption isotherms to determine their physicochemical properties. The arsenic removal capacities of adsorbent materials were studied from 1 mg/L solutions of As (III) using the colorimetric technique of molybdenum blue. High adsorption capacity (0.33 mg/g) of As (III) was obtained in aqueous systems after 1 h of treatment with unmodified bentonite. The incorporation of iron improved the removal performance in short times. The obtained results could be the starting point for the development of a low-cost filtration system that contributes to solve the problem of arsenic in water.
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Affiliation(s)
- Estefanía Baigorria
- Grupo de Materiales Compuestos Termoplásticos (CoMP) - Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICET - Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
| | - Leonardo Cano
- Grupo de Materiales Compuestos Termoplásticos (CoMP) - Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICET - Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
| | - Karim Sapag
- Laboratorio de Sólidos Porosos (LabSoP), Instituto de Física Aplicada (INFAP), CONICET - Universidad Nacional de San Luis, San Luis, Argentina
| | - Vera Alvarez
- Grupo de Materiales Compuestos Termoplásticos (CoMP) - Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICET - Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
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5
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Warshagha MA, Muneer M. Direct Z-Scheme AgBr/β-MnO 2 Photocatalysts for Highly Efficient Photocatalytic and Anticancer Activity. ACS OMEGA 2022; 7:30171-30183. [PMID: 36061726 PMCID: PMC9434753 DOI: 10.1021/acsomega.2c03260] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 08/05/2022] [Indexed: 05/28/2023]
Abstract
The preparation of visible light-responsive efficient photocatalysts for removing organic contaminants from water and killing cancer cells has gotten a lot of attention due to the growing global concern. In this study, we have successfully fabricated an efficient AgBr/β-MnO2 nanocomposite via a facile deposition and precipitation method at room temperature. Techniques such as XRD, SEM-EDS, TEM, DRS, PL, EIS, ESR, and FTIR were used to determine the crystalline, structural, morphological, optical, and other properties. The SEM and TEM analyses reveal that AgBr NPs are decorated on the surface of β-MnO2, which possesses rods with a sphere-like structure for AgBr/β-MnO2. The EDX analysis confirms the existence of Mn, O, Ag, and Br elements in the nanocomposites without an extra peak, indicating that the synthesized samples are highly pure. The high photocatalytic performance of AgBr/β-MnO2 could be attributed to the formation of Ag NPs and the construction of the Z-scheme heterojunction between AgBr and β-MnO2. This may enhance fast light absorption and efficient photogenerated (e-/h+) pairs, as indicated by EIS and photoluminescence measurements, which in turn achieved high activity for the decomposition of MB (97%, in 12 min), RhB (98.9%, in 9 min), and paracetamol (80%, in 180 min), respectively. The kinetic model study proposed that the first-order model showed a better fit than the zero- and second-order for the photocatalytic decolorization of RhB dye. XRD analysis of 0.2 AgBr/β-MnO2 before and after recycling confirms the high stability of the catalyst. HPLC results showed that no detectable by-products are produced through the decomposition of paracetamol. Interestingly, 0.2 AgBr/β-MnO2 nanocomposites showed visible light-induced anticancer activity against A549 cancer cell lines. The mechanistic degradation pathway has been proposed using the involvement of active species like superoxide radicals (-•O2) and photoinduced holes (h+). The proposed work focuses on synthesizing effective photocatalysts in a less hazardous environment with superior biological activity.
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Studies of Clinoptilolite-Rich Zeolitic Tuffs from Different Regions and Their Activity in Photodegradation of Methylene Blue. Catalysts 2022. [DOI: 10.3390/catal12020224] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The present study focuses on clinoptilolite (CLI)-rich natural zeolitic tuffs and their photocatalytic activity in the degradation of cationic organic dyes. CLI from different regions was tested in the photocatalytic degradation of methylene blue (MB) as a model cationic dye. The photocatalytic tests were performed at room temperature and atmospheric pressure under visible light irradiation. For all the CLI samples, the highest activity was observed at pH = 6. Total MB degradation varied between 70 and 91% (C0 = 10 mg dm–3, 0.2 g dm–3 of photocatalyst, during 300 min). It is suggested that the presence of Fe species in the studied tuffs is responsible for the photocatalytic activity. The activity increases linearly with the Fe content in the tuffs. The MB photodegradation follows the Langmuir–Hinshelwood kinetic model. The recyclability tests showed good stability and efficiency of the photocatalyst. The degradation rate decreased from 91 to 69% during three reaction cycles, indicating a promising potential of natural zeolites in the treatment of textile industry wastewater.
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Janbandhu SY, Ct S, Munishwar SR, Jayaramaiah JR, Gedam RS. Borosilicate glasses containing CdS/ZnS QDs: A heterostructured composite with enhanced degradation of IC dye under visible-light. CHEMOSPHERE 2022; 286:131672. [PMID: 34346328 DOI: 10.1016/j.chemosphere.2021.131672] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 07/16/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
The glass system SiO2-B2O3-Na2O3-ZnO containing 2 wt% CdS and 1 wt% ZnS was synthesized by the conventional melt quench method. Glass transition temperature and crystallization temperature was determined from Differential thermal analysis (DTA) measurement to optimize heat-treatment. The amorphous structure of the glass was confirmed by the X-ray diffraction (XRD) measurement. Glasses were heat-treated by optimized heat-treatment schedule to grow CdS/ZnS QDs and crystalline phases of CdS and ZnS were confirmed by the XRD measurement. High-Resolution Transmission Electron Microscopy (HRTEM) was used to determine the size and shape of quantum dots (QDs) grown in the glass matrix. The optical band gap was calculated from the absorption spectra and found to decrease with increase in size of QDs. Electron-hole recombination rate was studied using a decay time and impedance analyzer. Prepared samples were tested as a photocatalyst under sunlight for the degradation of indigo carmine (IC) dye and photodegradation efficiency was found to be 73.6 % and 87.2 % for samples CZ1 and CZ4 respectively. No significant change is observed in degradation efficiency even for 4 cycles which confirms the stability of prepared glasses for dye degradation.
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Affiliation(s)
- S Y Janbandhu
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India
| | - Suhaila Ct
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India
| | - S R Munishwar
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India
| | - J R Jayaramaiah
- Department of Physics, Government First Grade College, Tiptur, 572 201, India
| | - R S Gedam
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India.
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do Nascimento GE, de Freitas RA, Rodríguez-Díaz JM, da Silva PM, Napoleão TH, Duarte MMMB. Degradation of the residual textile mixture cetyltrimethylammonium bromide/remazol yellow gold RNL-150%/reactive blue BF-5G: evaluation photo-peroxidation and photo-Fenton processes in LED and UV-C photoreactors. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:64630-64641. [PMID: 34318422 DOI: 10.1007/s11356-021-15502-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
This article presents a study on the degradation of a residual textile mixture composed of cationic surfactant cetyltrimethylammonium bromide (CTAB) and the remazol yellow gold RNL-150% and reactive blue BF-5G textile dyes. This was carried out by employing the photo-peroxidation and photo-Fenton processes in LED and UV-C photoreactors. The photo-Fenton process was the most efficient as regards the degradation of the CTAB and dye mixture, for both types of radiation. In the kinetic study, degradations of 99% were obtained in 180 min for the chromophore groups using both types of radiation. The degradation of the CTAB and aromatic groups was, meanwhile, an average of 25% when employing LED radiation. The behavior of the degradation reaction was pseudo-first-order. Toxicity tests indicated that the solutions were better able to grow seeds and bacteria after treatment with the photo-Fenton process, using both types of radiation. The photo-Fenton processes carried out by employing LED and UV-C photoreactors were able to degrade the CTAB and dye mixture, thus highlighting the efficiency of LED radiation when its power (three times smaller) is compared to that of UV-C radiation. This process, therefore, represents an alternative for use in textile wastewater treatment systems.
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Affiliation(s)
- Graziele Elisandra do Nascimento
- Departamento de Engenharia Química, Universidade Federal de Pernambuco, Av. Prof. Arthur de Sá, s/n, Recife, PE, 50740-521, Brazil
| | - Raissa Aguiar de Freitas
- Departamento de Engenharia Química, Universidade Federal de Pernambuco, Av. Prof. Arthur de Sá, s/n, Recife, PE, 50740-521, Brazil
| | - Joan Manuel Rodríguez-Díaz
- Laboratorio de Análisis Químicos y Biotecnológicos, Instituto de Investigación, Universidad Técnica de Manabí, Portoviejo, Ecuador
- Departamento de Procesos Químicos, Facultad de Ciencias Matemáticas, Físicas y Químicas, Universidad Técnica de Manabí, Portoviejo, Ecuador
| | - Pollyanna Michelle da Silva
- Departamento de Bioquímica, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, s/n, Recife, PE, 50670-420, Brazil
| | - Thiago Henrique Napoleão
- Departamento de Bioquímica, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, s/n, Recife, PE, 50670-420, Brazil
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9
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Preparation and Application of Nb 2O 5 Nanofibers in CO 2 Photoconversion. NANOMATERIALS 2021; 11:nano11123268. [PMID: 34947617 PMCID: PMC8704612 DOI: 10.3390/nano11123268] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/25/2021] [Accepted: 11/27/2021] [Indexed: 11/17/2022]
Abstract
Increasing global warming due to NOx, CO2, and CH4, is significantly harming ecosystems and life worldwide. One promising methodology is converting pollutants into valuable chemicals via photocatalytic processes (by reusable photocatalysts). In this context, the present work aimed to produce a Nb2O5 photocatalyst nanofiber system by electrospinning to convert CO2. Based on the collected data, the calcination at 600 ∘C for 2 h resulted in the best condition to obtain nanofibers with homogeneous surfaces and an average diameter of 84 nm. As a result, the Nb2O5 nanofibers converted CO2 mostly into CO and CH4, reaching values around 8.5 μmol g−1 and 0.55 μmol g−1, respectively.
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Abstract
Abstract
Bentonite clay is one of the oldest clays that humankind has been using from ancient times as traditional habits and remedies. In recent years researchers have found many applications of bentonite clay due to its various physio-chemical properties. In the present work, various physical and chemical properties of bentonite such as surface area, adsorption, swelling properties, cation exchange properties, etc. have been studied. This study also includes various procedures of modification of bentonite clay into Chitosan/Ag-bentonite composite, Fe-Modified bentonite, Hydroxyl-Fe-pillared-bentonite, Organo Bentonite, Organophilic clay, Arenesulfonic Acid-Functionalized Bentonite, Bentonite clay modified with Nb2O5. The study reveals that bentonite clay has large surface area due to similar structure with montmorillonite and it is found that the functionality of bentonite can be increased by increasing total surface area of the clay. Due to high cation exchangeability of bentonite, various cations can be incorporated into it. After purification and modification, the absorbent aluminum phyllosilicate bentonite clay can be used as an efficient catalyst in various types of catalytic reactions. Moreover, bentonite clay can be applied in various field like drilling, civil engineering, agriculture and water treatment.
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Affiliation(s)
- Debasis Borah
- Department of Chemistry , Bodoland University , Kokrajhar , Assam 783370 , India
| | - Harshajit Nath
- Department of Chemistry , Bodoland University , Kokrajhar , Assam 783370 , India
| | - Hemaprobha Saikia
- Department of Chemistry , Bodoland University , Kokrajhar , Assam 783370 , India
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Investigation of copper plates as anode and TiO2/glycine/ZnFe2O4 stabilized on graphite as cathode for textile dyes degradation from aqueous solution under visible light. J APPL ELECTROCHEM 2021. [DOI: 10.1007/s10800-021-01580-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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12
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Su K, Liu H, Gao Z, Fornasiero P, Wang F. Nb 2O 5-Based Photocatalysts. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2003156. [PMID: 33898172 PMCID: PMC8061393 DOI: 10.1002/advs.202003156] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 11/23/2020] [Indexed: 05/02/2023]
Abstract
Photocatalysis is one potential solution to the energy and environmental crisis and greatly relies on the development of the catalysts. Niobium pentoxide (Nb2O5), a typically nontoxic metal oxide, is eco-friendly and exhibits strong oxidation ability, and has attracted considerable attention from researchers. Furthermore, unique Lewis acid sites (LASs) and Brønsted acid sites (BASs) are observed on Nb2O5 prepared by different methods. Herein, the recent advances in the synthesis and application of Nb2O5-based photocatalysts, including the pure Nb2O5, doped Nb2O5, metal species supported on Nb2O5, and other composited Nb2O5 catalysts, are summarized. An overview is provided for the role of size and crystalline phase, unsaturated Nb sites and oxygen vacancies, LASs and BASs, dopants and surface metal species, and heterojunction structure on the Nb2O5-based catalysts in photocatalysis. Finally, the challenges are also presented, which are possibly overcome by integrating the synthetic methodology, developing novel photoelectric characterization techniques, and a profound understanding of the local structure of Nb2O5.
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Affiliation(s)
- Kaiyi Su
- State Key Laboratory of Catalysis (SKLC)Dalian National Laboratory for Clean Energy (DNL)Dalian Institute of Chemical Physics (DICP)Chinese Academy of SciencesDalian116023China
- University of Chinese Academy of SciencesBeijing100049China
| | - Huifang Liu
- State Key Laboratory of Catalysis (SKLC)Dalian National Laboratory for Clean Energy (DNL)Dalian Institute of Chemical Physics (DICP)Chinese Academy of SciencesDalian116023China
| | - Zhuyan Gao
- State Key Laboratory of Catalysis (SKLC)Dalian National Laboratory for Clean Energy (DNL)Dalian Institute of Chemical Physics (DICP)Chinese Academy of SciencesDalian116023China
- University of Chinese Academy of SciencesBeijing100049China
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical SciencesINSTM ‐ Trieste and ICCOM ‐ CNR TriesteUniversity of TriesteVia L. Giorgieri 1Trieste34127Italy
| | - Feng Wang
- State Key Laboratory of Catalysis (SKLC)Dalian National Laboratory for Clean Energy (DNL)Dalian Institute of Chemical Physics (DICP)Chinese Academy of SciencesDalian116023China
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A. Rodrigues T, Falsetti PHE, Del Duque DMS, Silva GTST, F. Lopes O, Avansi W, Ribeiro C, R. de Mendonça V. A Versatile Nb
2
O
5
/SnO
2
Heterostructure for Different Environmental Purposes: Water Treatment and Artificial Photosynthesis. ChemCatChem 2020. [DOI: 10.1002/cctc.202001569] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Paulo H. E. Falsetti
- Department of Physics Federal University of São Carlos São Carlos/SP CEP 13565-905 Brazil
| | - Douglas M. S. Del Duque
- Federal Institute of Science, Education and Technology of São Paulo Itapetininga/SP CEP 18208-000 Brazil
| | - Gelson T. S. T. Silva
- Nanotechnology National Laboratory for Agriculture (LNNA) Embrapa Instrumentation São Carlos/SP CEP 13561-260 Brazil
| | - Osmando F. Lopes
- Laboratory of Photochemistry and Materials Science Institute of Chemistry Federal University of Uberlandia Uberlandia/MG CEP 38400-902 Brazil
- Institute of Energy and Climate Research (IEK-14) Electrochemical Process Engineering Forschungszentrum Jülich GmbH 52425 Jülich Germany
| | - Waldir Avansi
- Department of Physics Federal University of São Carlos São Carlos/SP CEP 13565-905 Brazil
| | - Caue Ribeiro
- Nanotechnology National Laboratory for Agriculture (LNNA) Embrapa Instrumentation São Carlos/SP CEP 13561-260 Brazil
| | - Vagner R. de Mendonça
- Federal University of São Carlos Sorocaba/SP CEP 18052-780 Brazil
- Federal Institute of Science, Education and Technology of São Paulo Itapetininga/SP CEP 18208-000 Brazil
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Chopda LV, Dave PN. Fe(III)/Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones. ChemistrySelect 2020. [DOI: 10.1002/slct.202003890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Lakha V Chopda
- Department of Chemistry KSKV Kachchh University Bhuj India
| | - Pragnesh N. Dave
- Department of Chemistry KSKV Kachchh University Bhuj India
- Department Of Chemistry Sardar Patel University, Vallabh Vidyanagar India
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Lacerda LHS, de Lazaro SR. Density Functional Theory investigation of rhombohedral multiferroic oxides for photocatalytic water splitting and organic photodegradation. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112656] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Casanova Monteiro F, Caetano EH, de Jesus Cubas P, Pupin AV, Monteiro JFHL, Fujiwara ST. Bi 2Fe 4O 9 in pellet form is an alternative in the wastewater treatment process. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2020; 55:677-685. [PMID: 32163004 DOI: 10.1080/10934529.2020.1732172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 02/11/2020] [Accepted: 02/13/2020] [Indexed: 06/10/2023]
Abstract
This study aimed to synthesize Bi2Fe4O9 and apply it to the degradation of tartrazine yellow dye. Bi2Fe4O9 was synthesized using the solid-state reaction and the Pechini method. The materials obtained were characterized using X-ray diffraction (XRD), visible ultraviolet spectroscopy (UV-Vis) and field emission scanning electron microscopy (FEG). The microscopic images revealed a morphological difference between the two materials in which the material obtained by the Pechini method is the most porous and have the largest surface area. The pellet obtained by the Pechini method was seen to have a lower bandgap value when compared with the sample solid state reaction. In the photocatalysis tests, the best performance was also that of the material obtained by the Pechini method, with 99.34% degradation, while the material obtained by solid state reaction showed 85.86% in 120 minutes. The solution degraded with the material obtained by the Pechini method presented 81.66% of mineralization while the solution with the material obtained by solid state reaction showed 60.97% of mineralization. The results confirmed that the material obtained by both syntheses is able to maintain its effectiveness after 10 repetitions of the photocatalytic process, proving to be promising for waste treatment in the industrial field.
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Affiliation(s)
| | - Elenice Hass Caetano
- Departamento de Química, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brasil
| | - Paloma de Jesus Cubas
- Departamento de Química, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brasil
| | - Amanda Vedam Pupin
- Departamento de Química, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brasil
| | | | - Sérgio Toshio Fujiwara
- Departamento de Química, Universidade Estadual de Ponta Grossa, Ponta Grossa, Paraná, Brasil
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