1
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Roy D, Roy B, Naskar B, Bala T. Detailed Study on the Interfacial Interaction between Different Polyoxometalates and Tetronic Block Copolymers Exploring the Langmuir-Blodgett Technique. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:16030-16047. [PMID: 38803109 DOI: 10.1021/acs.langmuir.4c00317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Polyoxometalates (POMs) interact with various biologically relevant entities. A basic understanding of this interaction is very important for various applications in the biological field. In this work, the focus is on the study of the interaction between tetronics and Keggin POMs. T701 and T90R4 are the two tetronics considered here; they have different solubilities in water due to different PPO/PEO ratios. The arrangement of PPO and PEO is also different with respect to the central ethylenediamine groups. Three different Keggin-type POMs, phosphomolybdic acid (PMA), phosphotungstic acid (PTA), and silicotungstic acid (STA), with different charge densities are chosen for an elaborate investigation using Langmuir-Blodgett technique. The observation is analyzed thoroughly, which shows both electrostatic interaction and adsorption of POMs on the PPO blocks of the tetronics due to the chaotropic effect, which is responsible for the binding of POMs (in subphase) with the tetronic monolayer. This interaction results in an expanded yet rigid monolayer for POM-tetronic association on the surface. Surface pressure vs mean molecular area isotherm is the key characterization to reach the conclusion. UV-vis spectroscopy, NMR, ITC, ellipsometric studies, FTIR, and SEM also serve as supportive characterization techniques.
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Affiliation(s)
- Dipali Roy
- Department of Chemistry, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India
| | - Bodhishatwa Roy
- Department of Electronic Science, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India
| | - Bappaditya Naskar
- Department of Chemistry, Sundarban Hazi Desarat College, Pathankhali 743611, India
| | - Tanushree Bala
- Department of Chemistry, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India
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2
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Pandey V, Bansal A, Toor AP. Synthesis and performance evaluation of S-scheme heterostructured LaFeO 3/TiO 2 photocatalyst for the efficient degradation of thiamethoxam. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:28578-28593. [PMID: 38558333 DOI: 10.1007/s11356-024-33092-5] [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: 12/20/2023] [Accepted: 03/22/2024] [Indexed: 04/04/2024]
Abstract
The application of perovskite lanthanum ferrite (LaFeO3) as a photocatalyst has shown significant potential in the removal of persistent organic and inorganic contaminants. In the present research, LaFeO3 and various composites consisting of LaFeO3 and TiO2 were prepared. The photocatalytic efficiency of the produced catalysts was assessed by measuring their effectiveness in degrading thiamethoxam, a pesticide belonging to the second generation of neonicotinoids. Experimental investigations were carried out to examine the impact of various factors on the degradation process, including variables like concentration of thiamethoxam, catalyst amount, and pH level. The produced catalysts were characterized by various techniques, including field emission scanning electron microscopy (FESEM), Brunauer-Emmett-Teller (BET) analysis, X-ray diffraction (XRD), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), photoluminescence (PL), and X-ray photoelectron spectroscopy (XPS). The highest degradation rates were observed when using the synthesized catalyst, 1% LaFeO3/TiO2 (LFTO1), under both UV-C and direct sunlight conditions. This performance outperformed TiO2 and bare LaFeO3. When exposed to ultraviolet (UV-C) radiation at an intensity of 15 W m-2 and under neutral pH conditions, LFTO1 achieved approximately 97% degradation, while under direct sunlight, the LFTO1 photocatalyst exhibited a degradation rate of 79% within a 120-min reaction period. The enhanced activity of LFTO1 could be attributed to its increased surface area, reduced bandgap, and lower electron-hole recombination. The investigation of reaction kinetics showed that the degradation of thiamethoxam followed a pseudo-first-order rate law. Furthermore, LFTO1 can be employed up to 5 times without experiencing any loss in its catalytic activity, thus confirming its long-term utility.
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Affiliation(s)
- Vidya Pandey
- Department of Chemical Engineering, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab, 144011, India
- Department of Chemical Engineering, DAV University, Jalandhar, Punjab, 144012, India
| | - Ajay Bansal
- Department of Chemical Engineering, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab, 144011, India.
| | - Amrit Pal Toor
- Dr. S. S. Bhatnagar University Institute of Chemical Engineering and Technology, Panjab University, Chandigarh, 160014, India
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M. S. Khalil K, Mahmoud AH, Khairy M. Formation and textural characterization of size-controlled LaFeO3 perovskite nanoparticles for efficient photocatalytic degradation of organic pollutants. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103429] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4
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Maridevaru MC, Anandan S, Aljafari B, Wu JJ. LaCo xFe 1-XO 3 (0≤x≤1) spherical nanostructures prepared via ultrasonic approach as photocatalysts. ULTRASONICS SONOCHEMISTRY 2021; 80:105824. [PMID: 34763211 PMCID: PMC8591478 DOI: 10.1016/j.ultsonch.2021.105824] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/22/2021] [Accepted: 11/03/2021] [Indexed: 05/02/2023]
Abstract
To harvest the photon energy, a sequenceof perovskite-type oxides of LaCoxFe1-xO3 (0 ≤x≤1) nanostructures with distinct 'Cobalt' doping at the position of B-site are successfully prepared via a simple ultrasonic approach as photocatalyst. The crystallinity, phase identification, microstructure, and morphology of perovskite nanocomposites were analyzed to better understand their physicochemical properties. The catalytic efficiency was assessedusing Congo Red (CR) dye by visible light irradiation for 30 min. Applying terephthalic acid as a probe molecule, the formation of hydroxyl radicals during the processes was investigated. The photocatalytic efficacy was measured by varying different Co/Fe stoichiometric molar ratios and noticed the order of sequence is 0.2 > 0.6 > 0.4 > 0.8 > 0.5 > 0 > 1 after 30 min of reaction time. Finally using LaCo0.2Fe0.8O3 nanostructures, cycling studies (n = 3) were performed to determine its photostability and reusability. The photocatalytic methodology proposed in this study was discussed extensively.
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Affiliation(s)
- Madappa C Maridevaru
- Nanomaterials and Solar Energy Conversion Lab, Department of Chemistry, National Institute of Technology, Trichy 620015, India
| | - Sambandam Anandan
- Nanomaterials and Solar Energy Conversion Lab, Department of Chemistry, National Institute of Technology, Trichy 620015, India.
| | - Belqasem Aljafari
- Department of Electrical Engineering, College of Engineering, Najran University, Najran 11001, Saudi Arabia
| | - Jerry J Wu
- Department of Environmental Engineering and Science, Feng Chia University, Taichung 407, Taiwan
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5
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Ugur Nigiz F. Comparative study on use of pervaporation membrane reactor for lauric acid – Methanol esterification. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118443] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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6
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Ghasemzadeh MA, Elyasi Z, Monfared MRZ. Enhanced Removal of Methyl Violet Dye from Aqueous Solution by a Novel Co3O4@SiO2@TiO2-Ag Heterogeneous Semiconductor. Comb Chem High Throughput Screen 2021; 25:883-894. [PMID: 33645475 DOI: 10.2174/1386207324666210301090123] [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: 11/03/2020] [Revised: 01/28/2021] [Accepted: 02/08/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND This research introduces the application of a novel photocatalyst including Co3O@SiO2@TiO2-Ag nanocomposite with highly photocatalytic stability and core-shell structure for the removal of toxic methyl violet from aqueous solution. OBJECTIVE The removal of toxic dyes and organic contaminants from water is outstanding research area between scientists. Methyl violet as a toxic cationic pollutant has disruptive influence for humans. In this research, with a aim to remove to methyl violet from the wastewater we developed a new photocatalyst including Co3O4@SiO2@TiO2-Ag nanocomposite as a eco-friendly and low-cost nanostructure with high photocatalytic activity in order to reduce the risks of this pollutant from aqueous media. METHODS The Co3O4@SiO2@TiO2-Ag nanostructure was prepared via hydrothermal and sol-gel methods and the structure elucidation of the prepared photocatalyst was analyzed by different spectroscopy techniques including XRD, FT-IR, FE-SEM, TEM, VSM and EDX. RESULTS Photodegradation of methyl violet in the presence of different structures showed that Co3O4@SiO2@TiO2-Ag is superior photocatalytic activity (about 98% was decomposed after 40 min) compared to the previous shells and pure Co3O4 NPs. Loadings of SiO2@TiO2-Ag nanocomposite over the Co3O4 surface led to the reduction in the band gap energy of visible light and improvement in the photocatalytic activity of Methyl Violet dye for the aqueous phase decomposition. CONCLUSION The remarkable benefits of this nanocomposite are highly photocatalytic efficiency in the degradation of methyl violet (almost 100 % within 1 h), easy magnetic separation, low cost, and high chemical stability. The collected results demonstrated the rate of degradation is increased by increasing the irradiation time, while the rate of degradation is decreased by dye concentration.
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Affiliation(s)
- Mohammad Ali Ghasemzadeh
- Department of Chemistry, Qom Branch, Islamic Azad University, Qom, I. R. Iran Post Box: 37491-13191. Iran
| | - Zahar Elyasi
- Department of Chemistry, Qom Branch, Islamic Azad University, Qom, I. R. Iran Post Box: 37491-13191. Iran
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Fakhri H, Esrafili A, Farzadkia M, Boukherroub R, Srivastava V, Sillanpää M. Preparation of tungstophosphoric acid/cerium-doped NH 2-UiO-66 Z-scheme photocatalyst: a new candidate for green photo-oxidation of dibenzothiophene and quinoline using molecular oxygen as the oxidant. NEW J CHEM 2021. [DOI: 10.1039/d1nj00328c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The goal of this study was to introduce an effective visible-light induced photocatalytic system with a good ability for photocatalytic oxidative desulfurization (PODS) and denitrogenation (PODN) using molecular oxygen (O2) as an oxidant.
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Affiliation(s)
- Hanieh Fakhri
- Research Center for Environmental Health Technology
- Iran University of Medical Sciences
- Tehran
- Iran
- Department of Environmental Health Engineering
| | - Ali Esrafili
- Research Center for Environmental Health Technology
- Iran University of Medical Sciences
- Tehran
- Iran
- Department of Environmental Health Engineering
| | - Mahdi Farzadkia
- Research Center for Environmental Health Technology
- Iran University of Medical Sciences
- Tehran
- Iran
- Department of Environmental Health Engineering
| | - Rabah Boukherroub
- Univ. Lille
- CNRS
- Centrale Lille
- Univ. Polytechnique Hauts-de-France
- UMR 8520 – IEMN
| | - Varsha Srivastava
- Department of Chemistry
- University of Jyvaskyla
- FI-40014 Jyvaskyla
- Finland
| | - Mika Sillanpää
- Institute of Research and Development
- Duy Tan University
- Da Nang 550000
- Vietnam
- Faculty of Environment and Chemical Engineering
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8
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Mani C, Ramalingam M, Manickam S, Vijayakumar B, Rani Srinivasalu K. Surfactant Encapsulated Iron (III) Coordinated Phosphomolybdate Hybrid: A Novel Adsorbent for the Selective Removal of Anionic Dyes. ChemistrySelect 2020. [DOI: 10.1002/slct.202003507] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Chandhru Mani
- Department of Chemistry B.S. Abdur Rahman Crescent Institute of Science and Technology Seethakathi Estate, Vandalur, Chennai Tamil Nadu 600 048 India
| | - Meenakshi Ramalingam
- Department of Chemistry B.S. Abdur Rahman Crescent Institute of Science and Technology Seethakathi Estate, Vandalur, Chennai Tamil Nadu 600 048 India
| | - Sundar Manickam
- Research, Science Academy of India Madambakkam Chennai, Tamil Nadu 603 202 India
| | - Bavithra Vijayakumar
- Department of Chemistry B.S. Abdur Rahman Crescent Institute of Science and Technology Seethakathi Estate, Vandalur, Chennai Tamil Nadu 600 048 India
| | - Kutti Rani Srinivasalu
- Department of Chemistry B.S. Abdur Rahman Crescent Institute of Science and Technology Seethakathi Estate, Vandalur, Chennai Tamil Nadu 600 048 India
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Imran M, Islam A, Farooq MU, Ye J, Zhang P. Characterization and adsorption capacity of modified 3D porous aerogel from grapefruit peels for removal of oils and organic solvents. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:43493-43504. [PMID: 32468363 DOI: 10.1007/s11356-020-09085-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 04/27/2020] [Indexed: 06/11/2023]
Abstract
With the rapid industrialization, especially offshore oil exploitation, frequent leakage incidents of oils/organic solvents have adversely affected ecological systems and environmental resources. Therefore, great interest has been shown in developing new materials to eliminate these organic pollutants, which have become worldwide problems. In this study, a cost-effective, environmentally friendly porous aerogel with three-dimensional (3D) structure was prepared from grapefruit peel by a facile hydrothermal method as the adsorbent of oils/organic solvents. The as-prepared modified grapefruit peel aerogel (M-GPA) showed mesoporous structure with high specific surface area of 36.42 m2/g and large pore volume of 0.0371 cm3/g. The excellent hydrophobicity of M-GPA with a water contact angle of 141.2° indicated a strong potential for adsorption of oils and organic solvents. The high adsorption capacity of M-GPA for a series of oils and organic solvents was 8 to 52 times as much as its own weight. Moreover, the M-GPA was easily regenerated and a high adsorption capacity recovery above 97% was maintained after five adsorption-regeneration cycles. Therefore, the M-GPA is a promising recyclable adsorbent for the removal of oils/organic solvents from polluted water.
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Affiliation(s)
- Muhammad Imran
- College of Environmental Sciences and Engineering, Beijing Forestry University, Qinghua East Road 35, Haidian District, Beijing, 100083, People's Republic of China
| | - Ashraful Islam
- State Key Laboratory of Environmental Aquatic Chemistry, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Muhammad Umair Farooq
- State Key Laboratory of Super Lattices and Microstructures, Institute of Semiconductor, Chinese Academy of Sciences, Beijing, 100083, China
| | - Junpei Ye
- College of Environmental Sciences and Engineering, Beijing Forestry University, Qinghua East Road 35, Haidian District, Beijing, 100083, People's Republic of China
| | - Panyue Zhang
- College of Environmental Sciences and Engineering, Beijing Forestry University, Qinghua East Road 35, Haidian District, Beijing, 100083, People's Republic of China.
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10
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Parvanak Boroujeni K, Tohidiyan Z, Shahsanaei H, Lorigooini Z, Fadavi A. Silver and palladium nanoparticles anchored to the core-shell Fe3O4@SiO2@Al2O3 for catalytic aerobic oxidation of alcohols and apoptotic induction on MCF-7 cells. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108206] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Mahmoudi F, Farhadi S, Jarosova M, Sillanpää M. Preparation of novel hybrid nanomaterials based on LaFeO
3
and phosphotungstic acid as a highly efficient magnetic photocatalyst for the degradation of methylene blue dye solution. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Saeed Farhadi
- Department of Chemistry Lorestan University Khorramabad Iran
| | - Marketa Jarosova
- Institute of Physics of the Czech Academy of Sciences Prague Czech Republic
| | - Mika Sillanpää
- Institute of Research and Development and Faculty of Environment and Chemical Engineering Duy Tan University Da Nang Vietnam
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12
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Farhadi S, Mahmoudi F, Kucerakova M, Rohlicek J, Dusek M. New hybrid nanostructures based on keggin-type 12-tungstophosphate and some metal-semicarbazone complexes: Synthesis, x-ray crystal structures and spectroscopic studies. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128385] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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13
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Rahmatinejad S, Naeimi H. Crumpled perovskite-type LaMoxFe1-xO3 nanosheets: A reusable catalyst for rapid and green synthesis of naphthopyranopyrimidine derivatives. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114318] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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14
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Cai T, Tian Y, Zhang J. Preparation of hollow nanospheres g-C 3N 4 loaded by Keggin type Cu mono-substituted heteropoly acid with enhanced visible-light harvesting and electron transfer properties for high-efficiency photocatalysis. PHOSPHORUS SULFUR 2019. [DOI: 10.1080/10426507.2019.1700412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Tianfeng Cai
- Division of Chemistry, Chemical Engineering and Environment, Liaoning Shihua University, Fushun, P. R. China
| | - Yueru Tian
- Unconventional Research Institute, CNOOC EnerTech-Drilling&Production Co., Tianjin, China
| | - Jie Zhang
- Division of Chemistry, Chemical Engineering and Environment, Liaoning Shihua University, Fushun, P. R. China
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Farhadi S, Mahmoudi F. Improving the adsorption ability of perovskite-type LaNiO3 nanomaterial towards organic dyes by hybridizing with phosphotungstic acid. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.05.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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Hoseini AA, Farhadi S, Zabardasti A, Siadatnasab F. A novel n-type CdS nanorods/p-type LaFeO 3 heterojunction nanocomposite with enhanced visible-light photocatalytic performance. RSC Adv 2019; 9:24489-24504. [PMID: 35527888 PMCID: PMC9069809 DOI: 10.1039/c9ra04265b] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 08/01/2019] [Indexed: 11/21/2022] Open
Abstract
In this work, a novel n-type CdS nanorods/p-type LaFeO3 (CdS NRs/LFO) nanocomposite was prepared, for the first time, via a facile solvothermal method. The as-prepared n-CdS NRs/p-LFO nanocomposite was characterized by using powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray spectroscopy (EDX), UV-visible diffuse reflection spectroscopy (DRS), vibrating sample magnetometry (VSM), photoluminescence (PL) spectroscopy, and Brunauer-Emmett-Teller (BET) surface area analysis. All data revealed the attachment of the LFO nanoparticle on the surface of CdS NRs. This novel nanocomposite was applied as a novel visible light photocatalyst for the degradation of methylene blue (MB), rhodamine B (RhB) and methyl orange (MO) dyes under visible-light irradiation. Under optimized conditions, the degradation efficiency was 97.5% for MB, 80% for RhB and 85% for MO in the presence of H2O2 and over CdS NRs/LFO nanocomposite. The photocatalytic activity of CdS NRs/LFO was almost 16 and 8 times as high as those of the pristine CdS NRs and pure LFO, respectively. The photocatalytic activity was enhanced mainly due to the high efficiency in separation of electron-hole pairs induced by the remarkable synergistic effects of CdS and LFO semiconductors. After the photocatalytic reaction, the nanocomposite can be easily separated from the reaction solution and reused several times without loss of its photocatalytic activity. Trapping experiments indicated that ·OH radicals were the main reactive species for dye degradation in the present photocatalytic system. On the basis of the experimental results and estimated energy band positions, the mechanism for the enhanced photocatalytic activity was proposed.
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Affiliation(s)
- Akram-Alsadat Hoseini
- Department of Chemistry, Lorestan University Khorramabad 68151-44316 Iran +986633120618 +986633120611
| | - Saeed Farhadi
- Department of Chemistry, Lorestan University Khorramabad 68151-44316 Iran +986633120618 +986633120611
| | - Abedin Zabardasti
- Department of Chemistry, Lorestan University Khorramabad 68151-44316 Iran +986633120618 +986633120611
| | - Firouzeh Siadatnasab
- Department of Chemistry, Lorestan University Khorramabad 68151-44316 Iran +986633120618 +986633120611
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Zheng D, Wei G, Xu L, Guo Q, Hu J, Sha N, Zhao Z. LaNi Fe1-O3 (0 ≤ x ≤1) as photothermal catalysts for hydrocarbon fuels production from CO2 and H2O. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.03.045] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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18
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Subudhi S, Mansingh S, Swain G, Behera A, Rath D, Parida K. HPW-Anchored UiO-66 Metal-Organic Framework: A Promising Photocatalyst Effective toward Tetracycline Hydrochloride Degradation and H 2 Evolution via Z-Scheme Charge Dynamics. Inorg Chem 2019; 58:4921-4934. [PMID: 30919619 DOI: 10.1021/acs.inorgchem.8b03544] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The abolition of environmental pollutants and production of hydrogen (H2) from water using a heterogeneous photocatalyst is a demanding science of the current scenario to solve the increasing environmental pollution and worldwide energy catastrophe in modern life. To validate this purpose, the design of low-cost and durable semiconductor-based photocatalysts with great light absorption capacity becomes the most challenging issue for researchers. Regarding this, herein the phosphotungstic acid (HPW)-anchored Zr6O4(OH)4(BDC)6 (UiO-66) metal-organic framework (MOF), i.e., HPW@UiO-66, has been prepared by a hydrothermal method and is efficient, stable, and capable of harvesting solar energy toward the degradation of tetracycline hydrochloride (TCH) and H2 production in the presence of a sacrificial donor. The ionic interaction between HPW and UiO-66 plays a key role toward the photostability and charge-transfer mechanism of the composite and is well characterized with X-ray diffraction, UV diffuse-reflectance spectroscopy, Fourier transform infrared, and X-ray photoelectron spectroscopy. A total of 30 wt % HPW@UiO-66 shows a maximum degradation of about 87.24% of a 20 ppm TCH solution in 60 min of solar-light irradiation and about 353.89 μmol/h of H2 production. The conduction- and valence-band potentials are well characterized with Mott-Schottky measurement and a delay charge recombination process through electrochemical impedance spectroscopy. The proposed mediator-free Z-scheme-oriented electron-hole migration route is well supported by photoluminescence, and the scavenger test well explains the better charge-carrier separation and high catalytic performance of the prepared composite. This research will bestow an advantageous blueprint to fabricate novel and challenging photocatalysts toward the photocatalytic treatment of environmental pollutants and H2 evolution.
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Affiliation(s)
- Satyabrata Subudhi
- Centre for Nano Science and Nanotechnology , Siksha 'O' Anusnadhan (Deemed to be University) , Bhubaneswar , Odisha 751030 , India
| | - Sriram Mansingh
- Centre for Nano Science and Nanotechnology , Siksha 'O' Anusnadhan (Deemed to be University) , Bhubaneswar , Odisha 751030 , India
| | - Gayatri Swain
- Centre for Nano Science and Nanotechnology , Siksha 'O' Anusnadhan (Deemed to be University) , Bhubaneswar , Odisha 751030 , India
| | - Arjun Behera
- Centre for Nano Science and Nanotechnology , Siksha 'O' Anusnadhan (Deemed to be University) , Bhubaneswar , Odisha 751030 , India
| | - Dharitri Rath
- Department of Chemistry , Rajdhani College , Bhubaneswar , Odisha 751003 , India
| | - Kulamani Parida
- Centre for Nano Science and Nanotechnology , Siksha 'O' Anusnadhan (Deemed to be University) , Bhubaneswar , Odisha 751030 , India
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S. S, S. M, T. D, D. L, A. P, P. S, A. S, V. N. Synthesis and characterization of Keggin-type polyoxometalate/zirconia nanocomposites—Comparison of its photocatalytic activity towards various organic pollutants. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.10.031] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Phosphotungstic acid supported on silica-coated LaCoO3: Synthesis, characterization and application as a novel and efficient adsorbent for the removal of organic pollutants. Polyhedron 2019. [DOI: 10.1016/j.poly.2018.11.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Rational Construction of LaFeO3 Perovskite Nanoparticle-Modified TiO2 Nanotube Arrays for Visible-Light Driven Photocatalytic Activity. COATINGS 2018. [DOI: 10.3390/coatings8110374] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
LaFeO3 nanoparticle-modified TiO2 nanotube arrays were fabricated through facile hydrothermal growth. The absorption edge of LaFeO3 nanoparticle-modified TiO2 nanotube arrays displaying a red shift to ~540 nm was indicated by the results of diffuse reflectance spectroscopy (DRS) when compared to TiO2 nanotube arrays, which means that the sample of LaFeO3 nanoparticle-modified TiO2 nanotube arrays had enhanced visible light response. Photoluminescence (PL) spectra showed that the LaFeO3 nanoparticle-modified TiO2 nanotube arrays efficiently separated the photoinduced electron–hole pairs and effectively prolonged the endurance of photogenerated carriers. The results of methylene blue (MB) degeneration under simulated visible light illumination showed that the photocatalytic activity of LaFeO3 nanoparticle-modified TiO2 nanotube arrays is obviously increased. LaFeO3 nanoparticle-modified TiO2 nanotube arrays with 12 h hydrothermal reaction time showed the highest degradation rate with a 2-fold enhancement compared with that of pristine TiO2 nanotube arrays.
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Farhadi S, Mahmoudi F, Amini MM, Dusek M, Jarosova M. Synthesis and characterization of a series of novel perovskite-type LaMnO 3/Keggin-type polyoxometalate hybrid nanomaterials for fast and selective removal of cationic dyes from aqueous solutions. Dalton Trans 2018; 46:3252-3264. [PMID: 28224153 DOI: 10.1039/c6dt04866h] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, Keggin-type heteropoly acids H3PMo12O40 (PMo12), H3PW12O40 (PW12) and H4SiW12O40 (SiW12) were successfully supported on silica-coated perovskite type LaMnO3 nanoparticles by a simple acid-base reaction. These novel hybrid nanomaterials (denoted as LaMnO3@SiO2/PMo12 (1), LaMnO3@SiO2/PW12 (2), and LaMnO3@SiO2/SiW12 (3)) were characterized by means of FT-IR, PXRD, inductively coupled plasma (ICP) spectrometry, SEM, EDX, TEM and BET surface area analysis. Furthermore, the adsorption abilities of 1-3 were tested towards cationic methylene blue (MB) and anionic methyl orange (MO) dyes. The results revealed that the MB dye can be removed almost completely (≥98%) by adsorbents 1-3 in 1, 30 and 0.5 minutes, respectively. For the most efficient adsorbent 3, the effects of the initial concentration and the initial pH values of MB solution on its adsorption ability were examined. Furthermore, the selective adsorption of the hybrid materials towards mixed MB & MO solution was investigated. The nanomaterials 1-3 could be easily separated from the aqueous solution and reused several times without any impact on their adsorption abilities and structures.
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Affiliation(s)
- Saeed Farhadi
- Department of Chemistry, Lorestan University, Khoramabad 68151-44316, Iran.
| | - Farzaneh Mahmoudi
- Department of Chemistry, Lorestan University, Khoramabad 68151-44316, Iran.
| | - Mostafa M Amini
- Department of Chemistry, Shahid Beheshti University, Tehran 1983963113, Iran.
| | - Michal Dusek
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 18221 Prague 8, Czech Republic
| | - Marketa Jarosova
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 18221 Prague 8, Czech Republic
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Yang YJ, Yao C, Li W. Immobilization of phosphotungstic acid on multiwalled carbon nanotubes with cetyltrimethyl ammonium bromide as the molecular linker for enhanced oxidation of hydroxylamine. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.06.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Farhadi S, Siadatnasab F, Khataee A. Ultrasound-assisted degradation of organic dyes over magnetic CoFe 2O 4@ZnS core-shell nanocomposite. ULTRASONICS SONOCHEMISTRY 2017; 37:298-309. [PMID: 28427637 DOI: 10.1016/j.ultsonch.2017.01.019] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 01/15/2017] [Accepted: 01/16/2017] [Indexed: 06/07/2023]
Abstract
Magnetic CoFe2O4@ZnS core-shell nanocomposite was successfully synthesized via one-step hydrothermal decomposition of zinc(II) diethanoldithiocarbamate complex over CoFe2O4 nanoparticles at low temperature of 200°C. The obtained nanocomposite was characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, UV-Vis spectroscopy, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, magnetic measurements, and Brunauere-Emmette-Teller. The results confirmed the formation of CoFe2O4@ZnS nanocomposite with the average crystallite size of 18nm. The band gap of 3.4eV was obtained using UV-vis absorption of CoFe2O4@ZnS nanocomposite, which made it a suitable candidate for sono-/photo catalytic processes. This nanocomposite was applied as a novel sonocatalyst for the degradation of organic pollutants under ultrasound irradiation. The results showed complete degradation of methylene blue (MB) (25mg/L) within 70min in the presence of CoFe2O4@ZnS nanocomposite and H2O2 (4mM). The trapping experiments indicated that OH radicals are the main active species in dye degradation. In addition, sonocatalytic activity of the CoFe2O4@ZnS nanocomposite was higher than those of pure ZnS and CoFe2O4, showing that the combining ZnS with magnetic CoFe2O4 could be an excellent choice to improve its sonocatalytic activity. The nanocomposite could be magnetically separated and reused without any observable change in its structure and performance even after five consecutive runs.
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Affiliation(s)
- Saeed Farhadi
- Department of Chemistry, Lorestan University, 68135-465 Khorramabad, Iran.
| | | | - Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran; Department of Materials Science and Nanotechnology, Near East University, 99138 Nicosia, North Cyprus, Mersin 10, Turkey.
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Xu L, Ha MN, Guo Q, Wang L, Ren Y, Sha N, Zhao Z. Photothermal catalytic activity of combustion synthesized LaCoxFe1−xO3 (0 ≤ x ≤ 1) perovskite for CO2 reduction with H2O to CH4 and CH3OH. RSC Adv 2017. [DOI: 10.1039/c7ra04879c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A range of LaCoxFe1−xO3 perovskites with different Co-doping at the B-site were successfully synthesized via a sol–gel combustion route.
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Affiliation(s)
- Lijuan Xu
- School of Materials Science and Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Minh Ngoc Ha
- Faculty of Chemistry
- Hanoi University of Science
- Vietnam National University
- Hanoi 10000
- Vietnam
| | - Qiangsheng Guo
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Lichao Wang
- School of Materials Science and Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Yanan Ren
- School of Materials Science and Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Na Sha
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Zhe Zhao
- School of Materials Science and Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
- Department of Materials Science and Engineering
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