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Petcu G, Anghel EM, Atkinson I, Culita DC, Apostol NG, Kuncser A, Papa F, Baran A, Blin JL, Parvulescu V. Composite Photocatalysts with Fe, Co, and Ni Oxides on Supports with Tetracoordinated Ti Embedded into Aluminosilicate Gel during Zeolite Y Synthesis. Gels 2024; 10:129. [PMID: 38391459 PMCID: PMC10888282 DOI: 10.3390/gels10020129] [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: 11/30/2023] [Revised: 02/02/2024] [Accepted: 02/03/2024] [Indexed: 02/24/2024] Open
Abstract
Ti-aluminosilicate gels were used as supports for the immobilization of Fe, Co, and Ni oxides (5%) by impregnation and synthesis of efficient photocatalysts for the degradation of β-lactam antibiotics from water. Titanium oxide (1 and 2%) was incorporated into the zeolite network by modifying the gel during the zeolitization process. The formation of the zeolite Y structure and its microporous structure were evidenced by X-ray diffraction and N2 physisorption. The structure, composition, reduction, and optical properties were studied by X-ray diffraction, H2-TPR, XPS, Raman, photoluminescence, and UV-Vis spectroscopy. The obtained results indicated a zeolite Y structure for all photocatalysts with tetracoordinated Ti4+ sites. The second transitional metals supported by the post-synthesis method were obtained in various forms, such as oxides and/or in the metallic state. A red shift of the absorption edge was observed in the UV-Vis spectra of photocatalysts upon the addition of Fe, Co, or Ni species. The photocatalytic performances were evaluated for the degradation of cefuroxime in water under visible light irradiation. The best results were obtained for iron-immobilized photocatalysts. Scavenger experiments explained the photocatalytic results and their mechanisms. A different contribution of the active species to the photocatalytic reactions was evidenced.
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Affiliation(s)
- Gabriela Petcu
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Elena Maria Anghel
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Irina Atkinson
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Daniela C Culita
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Nicoleta G Apostol
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
| | - Andrei Kuncser
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
| | - Florica Papa
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Adriana Baran
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Jean-Luc Blin
- Faculty of Sciences and Technology, University of Lorraine, CNRS, L2CM, F-54000 Nancy, France
| | - Viorica Parvulescu
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania
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Umejuru EC, Mashifana T, Kandjou V, Amani-Beni M, Sadeghifar H, Fayazi M, Karimi-Maleh H, Sithole T. Application of zeolite based nanocomposites for wastewater remediation: Evaluating newer and environmentally benign approaches. ENVIRONMENTAL RESEARCH 2023; 231:116073. [PMID: 37164282 DOI: 10.1016/j.envres.2023.116073] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/01/2023] [Accepted: 05/05/2023] [Indexed: 05/12/2023]
Abstract
The presence of heavy metal ions and emerging pollutants in water poses a great risk to various biological ecosystems as a result of their high toxicity. Consequently, devising efficient and environmentally friendly methods to decontaminate these waters is of high interest to many researchers around the world. Among the varied water treatment and desalination means, adsorption and photocatalysis have been widely employed. However, the discussion and analysis of the use of zeolite-based composites as adsorbents are somehow minimal. The porous aluminosilicates (zeolites) are excellent candidates in wastewater treatment owing to various mechanisms of pollutants removal that they possess. The purpose of this review is thus to provide a synopsis of the current developments in the fabrication and application of nanocomposites based on zeolite as adsorbents and photocatalysts for the extraction of heavy metals, dyes and emerging pollutants from wastewaters. The review goes on to look into the effect of weight ratio on photocatalyst, photodegradation pathways, and various factors that influence photocatalysis and adsorption.
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Affiliation(s)
- Emmanuel Christopher Umejuru
- Department of Chemical Engineering, University of Johannesburg, P.O. Box 17011, Doornfontein, 2088, South Africa
| | - Tebogo Mashifana
- Department of Chemical Engineering, University of Johannesburg, P.O. Box 17011, Doornfontein, 2088, South Africa
| | - Vepika Kandjou
- Department of Chemical Engineering, University of Johannesburg, P.O. Box 17011, Doornfontein, 2088, South Africa; Department of Chemical Materials and Metallurgical Engineering (CMME), Faculty of Engineering and Technology (FET), Botswana International University of Science and Technology (BIUST), P/Bag 16, Palapye, Botswana
| | - Majid Amani-Beni
- School of Architecture, Southwest Jiaotong University, 611756, Chengdu, China
| | - Hasan Sadeghifar
- R&D Laboratory, Hollingsworth & Vose (H&V) Company, West Groton, MA, 01452, USA
| | - Mahsa Fayazi
- School of Resources and Environment, University of Electronic Science and Technology of China, 611731, Xiyuan Ave, Chengdu, PR China
| | - Hassan Karimi-Maleh
- School of Resources and Environment, University of Electronic Science and Technology of China, 611731, Xiyuan Ave, Chengdu, PR China; Department of Chemical Engineering, Quchan University of Technology, Quchan, 9477177870, Iran; Department of Sustainable Engineering, Saveetha School of Engineering, SIMATS, Chennai, 602105, India.
| | - Thandiwe Sithole
- Department of Chemical Engineering, University of Johannesburg, P.O. Box 17011, Doornfontein, 2088, South Africa.
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Development of the geopolymer-based zeolite from powdery silica fume and its application in methanol to dimethyl ether. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Setthaya N, Pimraksa K, Damrongwiriyanupap N, Panias D, Mekrattanachai P, Chindawong C. Modified zeolite from metakaolin and fly ash as efficient adsorbent for cationic methylene blue dye removal. CHEM ENG COMMUN 2022. [DOI: 10.1080/00986445.2022.2067748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
| | - Kedsarin Pimraksa
- Department of Industrial Chemistry, Chiang Mai University, Chiang Mai, Thailand
| | | | - Dimitrios Panias
- School of Mining and Metallurgical Engineering, National Technical University of Athens, Athens, Greece
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Rathi A, Barman S, Basu S, Arya RK. Post-fabrication structural changes and enhanced photodegradation activity of semiconductors@zeolite composites towards noxious contaminants. CHEMOSPHERE 2022; 288:132609. [PMID: 34687683 DOI: 10.1016/j.chemosphere.2021.132609] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 10/15/2021] [Accepted: 10/17/2021] [Indexed: 06/13/2023]
Abstract
This review article provides the recent progress in semiconductor-based zeolite photoactive materials for the application of noxious contaminants removal. The rapidly expanding industrialization and globalization cause serious threats to the environment or water bodies. The semiconductor@zeolite photocatalysts were implemented for water quality management/sustainment. The exclusive properties of zeolite material have been elaborated with their role in the photocatalysis process. The photoactive material's properties like single-atom catalysts (SACs), distribution of metal in the zeolite crystal were elaborated along with their role in catalytic reactions. Differently prepared semiconductor@zeolite composites such as TiO2@zeolite, binary and ternary composites, Fe/Ag/bismuth-modified/ZnO/ZnS/NiO/g-C3N4/core-shell/quantum dots modified zeolite composites, were systematically summarized. The research progress in morphologies, structural effect, degradation mechanism were recapitulated and tabulated form of % degradation with their optimal parameters such as catalyst dose, pollutant concentrations, pH, light source intensities were also provided. The significance of zeolite frameworks, the structural properties of semiconductor@zeolite photoactive materials to enhance the degradation efficiencies was explored. Analysis of the intermediate products of Norfloxacin, TCDD (2,3,7,8-tetrachlorodibenzo-p-dioxin), TCDF (2,3,7,8-tetrachlorodibenzofuran), diclofenac contaminants were systematically represented and structurally identified by GC-MS/HPLC-MS techniques.
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Affiliation(s)
- Aanchal Rathi
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, India
| | - Sanghamitra Barman
- Department of Chemical Engineering, Thapar Institute of Engineering and Technology, India.
| | - Soumen Basu
- School of Chemistry and Biochemistry, Affiliate Faculty-TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, India.
| | - Raj Kumar Arya
- Department of Chemical Engineering, Dr B R Ambedkar National Institute of Technology, Jalandhar, Punjab, India
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Chen K, Ng KH, Cheng CK, Cheng YW, Chong CC, Vo DVN, Witoon T, Ismail MH. Biomass-derived carbon-based and silica-based materials for catalytic and adsorptive applications- An update since 2010. CHEMOSPHERE 2022; 287:132222. [PMID: 34826917 DOI: 10.1016/j.chemosphere.2021.132222] [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: 06/10/2021] [Revised: 08/28/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023]
Abstract
Biomass, which defined as plant- or animal-based materials, is intriguing tremendous scientific attentions due to its renewable attribute in serving energy security. Amongst, the plant-based biomasses, particularly those that co-generated in the agriculture activities, are commonly regarded as fuel for burning, which overlooked their hidden potentials for high-end applications. Organically, the plant-based biomass constitutes of lignocellulose components, which can be served as promising precursors for functionalized carbon materials. Meanwhile, its inorganic counterpart made up of various minerals, with Si being the most concerned one. With the advancement of biomass technologies and material synthesis in recent years, numerous attempts were endeavoured to obtain valorised products from biomass. Particularly, syntheses of catalytic and adsorptive materials are actively researched in the field of biomass reutilization. Herein, our work systematically summarized the advancements of biomass-materials for these applications in recent 10 years (2010-2020), with a special focus on the carbon-based and Si-based catalytic/adsorptive materials. Significantly, the deriving steps, inclusive of both pre-treatment and post-treatment of such materials, are incorporated in the discussion, alongside with their significances revealed too. The performance of the as-obtained materials in the respective application is systematically correlated to their physicochemical properties, hence providing valuable insights to the readers. Challenges and promising directions to be explored are raised too at the end of the review, aiming to advocate better-usage of biomass while offering great opportunities to sustain catalysis and adsorption in the industrial scale.
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Affiliation(s)
- Kaijuan Chen
- School of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, NSW, 2008, Australia
| | - Kim Hoong Ng
- Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City, 24301, Taiwan.
| | - Chin Kui Cheng
- Department of Chemical Engineering, College of Engineering, Khalifa University, P. O. Box, 127788, Abu Dhabi, United Arab Emirates
| | - Yoke Wang Cheng
- Department of Chemical Engineering, School of Science and Engineering, Manipal International University, 71800, Putra Nilai, Negeri Sembilan, Malaysia
| | - Chi Cheng Chong
- Department of Chemical Engineering, School of Science and Engineering, Manipal International University, 71800, Putra Nilai, Negeri Sembilan, Malaysia
| | - Dai-Viet N Vo
- Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414, Viet Nam
| | - Thongthai Witoon
- Center of Excellence on Petrochemical and Materials Technology, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, 10900, Thailand
| | - Muhammad Heikal Ismail
- Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra, Malaysia
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Wang Z, Wu Z, Zhi X, Tu T, Nie J, Du X, Luo Y. TiO 2/CTS/ATP adsorbent modification and its application in adsorption-ultrafiltration process for dye wastewater purification. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:59963-59973. [PMID: 34152543 DOI: 10.1007/s11356-021-13933-3] [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: 01/21/2021] [Accepted: 04/09/2021] [Indexed: 06/13/2023]
Abstract
Industrial dyeing produces highly polluting wastewater and threatens the environment. Effective treatment of dyeing wastewater is a crucial step to prevent toxic chemicals from entering receiving waters. This study aimed to assess a modified attapulgite (ATP)-based adsorbent for dyeing wastewater purification by introducing chitosan (CTS) and titanium dioxide (TiO2) into the adsorbent material named TiO2/CTS/ATP. It was found that after modification, the adsorbent showed a lower hydrophilicity, as demonstrated by an increase in the water contact angle from 9.1° to 42°, which could reduce the water adsorption tendency and potentially facilitate contaminants adherence. The modification also led to a significantly increased specific surface area of 79.111 m2/g from 3.791 m2/g and exhibited more uniform and smaller particle size (reduced from 3.99 to 2.52 μm). When the TiO2/CTS/ATP adsorbent was applied to the adsorption of Congo red solution, the adsorption efficiency was observed to reach to 97.6% at the dosage of 0.5 g/L. Furthermore, the combination of adsorption and ultrafiltration was able to achieve 99% Congo red removal. Adsorption pretreatment prior to the ultrafiltration also enabled to reduce membrane fouling, increased the reversible membrane fouling, and resulted in a considerably lower transmembrane pressure as compared with the direct ultrafiltration filtration system.
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Affiliation(s)
- Zhihong Wang
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China
| | - Zekun Wu
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China
| | - Xujun Zhi
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China
| | - Tianfu Tu
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China
| | - Jinxu Nie
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China
| | - Xing Du
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China.
| | - Yunlong Luo
- Global Centre for Environmental Remediation (GCER), University of Newcastle, Callaghan, NSW, 2308, Australia.
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Computational Study of the Adsorption of Phosphates as Wastewater Pollutant Molecules on Faujasites. Processes (Basel) 2021. [DOI: 10.3390/pr9101821] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The adsorption of sodium dihydrogen phosphate (NaH2PO4) onto X- and Y-type faujasite zeolites was computationally studied using the Density Functional Theory (DFT) method. The structures were modeled using the Materials Studio software. The Si/Al ratios for the X- and Y-type zeolite models were 1.2 and 2.5, respectively. The central pore of the zeolite provided a more favorable coordination for adsorbing NaH2PO4. Full molecular optimization and adsorption energy calculations were performed using the VASP code. The adsorption was more effective on zeolite Y, with an adsorption energy of 161 kJ/mol, compared to the zeolite X system, with an adsorption energy of 31.64 kJ/mol. This calculated value for X-type faujasite was found in the interval of the adsorption energy of H2PO4− on hydrated Fe oxide (94.4 kJ/mol) and modified polyether sulfone (22.5 kJ/mol), and the calculated adsorption energy of the molecule on Y-type faujasite coincides with the reported value for this adsorbate on Mg/Ca-modified biochar structures. The molecular conformations of the adsorbate on the two studied models are very different, so the difference between the adsorption energy values of each type of zeolite model is comprehensible. On the one hand, the oxygen atoms of the molecule formed a bidentate complex with the hydrogen atoms of the pore in the X-type faujasite model, and the O-H distance was 1.5 Ǻ. On the other hand, an adsorbed oxygen atom of the phosphate was placed on a hydrogen atom at site II of the Y-type faujasite zeolite, and two of the hydrogen atoms of the phosphate were placed on the oxygen atoms. The Bader analysis results indicated that the negative charge of the phosphate anions was delocalized on the zeolites protons. The hydroxy groups of the phosphate form bonds between their hydrogen atoms and the oxygen atoms of the zeolite porous structure; therefore, we concluded that these sites have an alkaline character. The aim of this study was to include a computational analysis of possible phosphate adsorption mechanisms in faujasite zeolites that can be confirmed by experimental tests, and hence contribute to the generation of new technologies for capturing pollutant molecules in wastewater. The results are in agreement with the experimental information concerning the influence of pH on the adsorption activity of phosphate adsorption on zeolites.
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Son BT, Long NV, Nhat Hang NT. Fly ash-, foundry sand-, clay-, and pumice-based metal oxide nanocomposites as green photocatalysts. RSC Adv 2021; 11:30805-30826. [PMID: 35498918 PMCID: PMC9041310 DOI: 10.1039/d1ra05647f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/02/2021] [Indexed: 12/12/2022] Open
Abstract
Metal oxides possess exceptional physicochemical properties which make them ideal materials for critical photocatalytic applications. However, of major interest, their photocatalytic applications are hampered by several drawbacks, consisting of prompt charge recombination of charge carriers, low surface area, inactive under visible light, and inefficient as well as expensive post-treatment recovery. The immobilization of metal oxide semiconductors on materials possessing high binding strength eliminates the impractical and costly recovery of spent catalysts in large-scale operations. Notably, the synthesis of green material (ash, clay, foundry sand, and pumice)-based metal oxides could provide a synergistic effect of the superior adsorption capacity of supporting materials and the photocatalytic activity of metal oxides. This phenomenon significantly improves the overall degradation efficiency of emerging pollutants. Inspired by the novel concept of "treating waste with waste", this contribution highlights recent advances in the utilization of natural material (clay mineral and pumice)- and waste material (ash and foundry sand)-based metal oxide nanocomposites for photodegradation of various pollutants. First, principles, mechanism, challenges towards using metal oxide as photocatalysts, and immobilization techniques are systematically summarized. Then, sources, classifications, properties, and chemical composition of green materials are briefly described. Recent advances in the utilization of green materials-based metal oxide composites for the photodegradation of various pollutants are highlighted. Finally, in the further development of green materials-derived photocatalysts, we underlined the current gaps that are worthy of deeper research in the future.
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Affiliation(s)
- Bui Thanh Son
- Nanotechnology, Thu Dau Mot University Binh Duong Province Vietnam
| | - Nguyen Viet Long
- Nanotechnology, Thu Dau Mot University Binh Duong Province Vietnam
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Gadore V, Ahmaruzzaman M. Fly ash-based nanocomposites: a potential material for effective photocatalytic degradation/elimination of emerging organic pollutants from aqueous stream. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:46910-46933. [PMID: 34263399 DOI: 10.1007/s11356-021-15251-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 06/28/2021] [Indexed: 06/13/2023]
Abstract
Fly ash is readily available and cheaply generated as 47a by-product of the combustion of organic matter. A tremendous amount of fly ash is generated worldwide, and its disposal has imposed 47a severe environmental concern. Its good adsorption capacities attracted several researchers to study the use of fly ash as 47a support for photocatalysts for the degradation of contaminants from wastewater. Undoubtedly the photocatalysts supported on fly ash have represented excellent degradation efficiencies due to the synergistic effect of adsorption and photocatalytic capacity. The utilization of fly ash as 47a precursor has solved the problem of disposal and added value to the waste by-product. Various preparation techniques for fly ash-based nanocomposites such as the sol-gel method, hydrothermal method, solvothermal method, precipitation and co-precipitation, modified metalorganic decomposition, electrospinning, incipient impregnation, and wet chemical synthesis, along with 47a brief study of their characterization using scanning electron microscopy, X-ray diffraction technique and Fourier transform infrared (FTIR) spectroscopy, and the mechanism of photodegradation of dyes have been discussed in this paper. The literature shows that SiO2, TiO2, and Al2O3 present in fly ash play an essential role in the photodegradation of dyes. Factors affecting the degradation of dyes, their kinetic studies, and methods to enhance photodegradation efficiency have also been discussed.
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Affiliation(s)
- Vishal Gadore
- Department of Chemistry, National Institute of Technology, Silchar, Assam, 788010, India
| | - Md Ahmaruzzaman
- Department of Chemistry, National Institute of Technology, Silchar, Assam, 788010, India.
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Combined Adsorption and Photocatalytic Degradation for Ciprofloxacin Removal Using Sugarcane Bagasse/N,S-TiO2 Powder Composite. WATER 2021. [DOI: 10.3390/w13162300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
N,S-TiO2 deposited on three kinds of pre-treated sugarcane bagasse was synthesized via a sol–gel method. The obtained composites were characterized by various techniques, including scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and photoluminescence spectroscopy (PL). UV-visible induced degradation of ciprofloxacin was investigated. The influence of some experimental parameters such as contact time, pH, dosage, and initial concentration on the efficiency of ciprofloxacin elimination was also evaluated. The highest efficiency was observed for the alkaline pre-treated sugarcane bagasse combined with N,S-TiO2, about 86% under optimal conditions (contact time 150-min irradiation, pH 5.5–6, dosage 0.5 g L−1, and the initial concentration CIP 30 ppm). There may be a rapid ciprofloxacin transition from the adsorption site to the photocatalytic site, and the alkaline pre-treated sugarcane bagasse/N,S-TiO2 prevented the recombining of holes and electrons of the photocatalyst. Furthermore, the alkaline pretreatment sugarcane bagasse/N,S-TiO2 composite material was sustainable, with only a 10% reduction after reusing the material three times. The presence of sugarcane bagasse made the material easy to recover from the liquid phase.
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An investigation on MIL-101 Fe/PANI/Pd nanohybrid as a novel photocatalyst based on MIL-101(Fe) metal–organic frameworks removing methylene blue dye. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130007] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Abstract
Multicompound TiO2/SiO2 nanoparticles with a diameter of 50–70 nm were generated using a liquid flame spray (LFS) nanoparticle deposition in a single flame. Here, we study the photocatalytic activity of deposited multicompound nanoparticles in gas-phase via oxidation of acetylene into carbon dioxide that gives new insight about the multicompound nanoparticle morphology. A small addition of SiO2 content of 0.5%, 1.0% and 3.0% significantly suppressed the photocatalytic activity by 33%, 44% and 70%, respectively, whereas 5.0% SiO2 addition completely removed the activity. This may be due to a formation of a thin passivating SiO2 layer on top of the of the TiO2 nanostructures during the LFS nanoparticle deposition. Surface wetting results support this hypothesis with a significant increase in water contact angle as the SiO2 content is increased.
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Miranda LG, Peglow CP, Deorristt VC, Sales Neto GC, Cardoso AM, Ferrarini SF, Pires MJR. Evaluation of the removal of
n
‐butanol vapor by the poly(lactic acid)
‐zeolite‐TiO
2
composite and formation of by‐products. J Appl Polym Sci 2021. [DOI: 10.1002/app.49842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Luciana Gampert Miranda
- Graduate Program in Materials Engineering and Technology Pontifical Catholic University of Rio Grande do Sul Porto Alegre Brazil
| | - Carolina Pereira Peglow
- School of Technology Pontifical Catholic University of Rio Grande do Sul Porto Alegre Brazil
| | | | | | - Ariela Milbrath Cardoso
- Graduate Program in Materials Engineering and Technology Pontifical Catholic University of Rio Grande do Sul Porto Alegre Brazil
| | - Suzana Frighetto Ferrarini
- Graduate Program in Materials Engineering and Technology Pontifical Catholic University of Rio Grande do Sul Porto Alegre Brazil
- Unidade Hortênsias State University of Rio Grande do Sul (UERGS) São Francisco de Paula Brazil
| | - Marçal José Rodrigues Pires
- Graduate Program in Materials Engineering and Technology Pontifical Catholic University of Rio Grande do Sul Porto Alegre Brazil
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Eltaweil AS, Elshishini HM, Ghatass ZF, Elsubruiti GM. Ultra-high adsorption capacity and selective removal of Congo red over aminated graphene oxide modified Mn-doped UiO-66 MOF. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2020.10.084] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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16
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Islam T, Peng C. Synthesis of carbon embedded silica and zeolite from rice husk to remove trace element from aqueous solutions: characterization, optimization and equilibrium studies. SEP SCI TECHNOL 2020. [DOI: 10.1080/01496395.2019.1658781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Affiliation(s)
- Tariqul Islam
- The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, China
- Department of Agricultural Construction and Environmental Engineering, Sylhet Agricultural University, Sylhet, Bangladesh
| | - Changsheng Peng
- The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, China
- School of Environment and Chemical Engineering, Zhaoqing University, Zhaoqing, China
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17
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Geopolymer/Zeolite composite materials with adsorptive and photocatalytic properties for dye removal. PLoS One 2020; 15:e0241603. [PMID: 33125419 PMCID: PMC7598482 DOI: 10.1371/journal.pone.0241603] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 10/16/2020] [Indexed: 11/20/2022] Open
Abstract
This study investigated the adsorption capacities and photocatalytic activities of geopolymer-zeolite composite materials by incorporating different amounts of zeolite and TiO2 in a geopolymer matrix for dye removal. Geopolymers with SiO2/Al2O3 molar ratio of 2.5 were synthesized from metakaolin. The geopolymers containing zeolite and TiO2-doped zeolite exhibited similar behavior in terms of mineral compositions, microstructures and chemical frameworks. The compressive strength of geopolymer-zeolite composite materials decreased with increasing amount of zeolite and TiO2-doped zeolite (0-40 wt%) because of the increase in the porosity of composite materials. The maximum methylene blue adsorption capacity and photocatalytic efficiency of the powdered geopolymer composites with 40 wt% TiO2-doped zeolite was 99.1% and was higher than that of the composites with 40 wt% zeolite without TiO2-doping (92.5%). In addition, the geopolymer composites with TiO2-doped zeolite exhibited excellent stability after repeated usage as photocatalysts. The adsorption capacity and photocatalytic activity of pelletized geopolymer composites decreased because of the reduction in their specific surface area.
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Reddy Gontu R, Kattela C, Sengottuvelan B. The Heterogenized Hexazatricyclic Complexes as Solid Acid Catalyst for the Degradation of Rhodamine‐b. ChemistrySelect 2020. [DOI: 10.1002/slct.202001993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ramanjaneya Reddy Gontu
- Centre for Nanoscience and Nanotechnology International Research Centre, Sathyabama Institute of Science and Technology (Deemed to be University), Jeppiaar Nagar Chennai 600119 India
- Department of Inorganic Chemistry School of Chemical Sciences, University of Madras, Guindy Campus Chennai 600025 India
| | - Chennakesavulu Kattela
- Centre for Nanoscience and Nanotechnology International Research Centre, Sathyabama Institute of Science and Technology (Deemed to be University), Jeppiaar Nagar Chennai 600119 India
- Department of Chemistry Sathyabama Institute of Science and Technology (Deemed to be University), Jeppiaar Nagar Chennai 600119 India
| | - Balasubramanian Sengottuvelan
- Department of Inorganic Chemistry School of Chemical Sciences, University of Madras, Guindy Campus Chennai 600025 India
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Adsorption Thermodynamic and Kinetic Studies of Methyl Orange onto Sugar Scum Powder as a Low-Cost Inorganic Adsorbent. J CHEM-NY 2020. [DOI: 10.1155/2020/9165874] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
In the present study, batch adsorption experiments were carried out to investigate the removal of methyl orange (MO) from aqueous solution using sugar scum powder as an effective inorganic adsorbent which is a cheap precursor and abundant. The characteristics of this material were determined using XRD, SEM/EDX, and FTIR. The adsorption performance of sugar scum powder was evaluated using MO as the model adsorbate. Effects of various parameters such as initial dye concentration, contact time, and adsorbent dose were studied. The adsorption process can be best described by the pseudo-second-order kinetic and Langmuir adsorption isotherm models. Maximum monolayer adsorption capacity for MO removal was found to be 15.24 mg/g at temperature 22°C and pH 7.2. Moreover, thermodynamic parameters suggested that the adsorption of MO onto sugar scum powder was a spontaneous and exothermic process. The results demonstrated that sugar scum is a suitable precursor for the preparation of efficient adsorbent for dye removal from wastewater.
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Zhang Y, Shao Q, Chen C, Jiang H, Su F, Hu Q, Guo Z. Microwave-hydrothermal synthesis of beta-bismuth (III) oxide nanopowders and their enhanced photocatalytic properties. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2020.05.068] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Nouri L, Hemidouche S, Boudjemaa A, Kaouah F, Sadaoui Z, Bachari K. Elaboration and characterization of photobiocomposite beads, based on titanium (IV) oxide and sodium alginate biopolymer, for basic blue 41 adsorption/photocatalytic degradation. Int J Biol Macromol 2020; 151:66-84. [DOI: 10.1016/j.ijbiomac.2020.02.159] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 02/14/2020] [Accepted: 02/15/2020] [Indexed: 12/18/2022]
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22
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Wang Y, Jia H, Fang X, Qiu Z, Du T. CO2 and water vapor adsorption properties of framework hybrid W-ZSM-5/silicalite-1 prepared from RHA. RSC Adv 2020; 10:24642-24652. [PMID: 35516192 PMCID: PMC9055144 DOI: 10.1039/d0ra03736b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 06/03/2020] [Indexed: 11/29/2022] Open
Abstract
Framework hybrid W-ZSM-5 and W-silicalite-1 zeolites were synthesized by hydrothermal methods using rice husk ash (RHA) as a silicon raw material. RHA is a low-cost precursor material, and its use can also alleviate the environmental and human health related problems that may occur when it is stacked in open fields. A series of comparative samples were characterized by XRD, FTIR, ICP-OES, SEM, N2 adsorption–desorption and pore size analysis in order to examine their crystal structure, hybrid state, morphology and textural properties. The maximum CO2 adsorption capacities of W-ZSM-5 and W-silicalite-1 are 81.69 and 69.96 cm3 g−1, respectively, measured at 15 bar. The isotherms of CO2, N2 and O2 are perfectly fitted by the Toth model, and it is noted that the presence of Al atoms increases the heterogeneity. It can be seen that the greater the heterogeneity of the adsorbent, the larger the CO2 adsorption capacity achieved. The incorporation of tungsten into the framework does not affect the crystallization of the zeolite, but it prevents the formation of silanol and O–H groups at the adsorption sites. Therefore, the CO2/H2O selectivity of W-ZSM-5 is slightly higher than that of ZSM-5, and that of W-silicalite-1 is three times that of silicalite-1. W-ZSM-5/silicalite-1 are promising adsorbents for separating CO2 under humid industrial conditions. Framework hybrid W-ZSM-5 and W-silicalite-1 zeolites were synthesized by hydrothermal methods using rice husk ash (RHA) as a silicon raw material.![]()
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Affiliation(s)
- Yisong Wang
- State Environmental Protection Key Laboratory of Eco-Industry
- Northeastern University
- Shenyang 110819
- China
| | - He Jia
- State Environmental Protection Key Laboratory of Eco-Industry
- Northeastern University
- Shenyang 110819
- China
| | - Xin Fang
- State Environmental Protection Key Laboratory of Eco-Industry
- Northeastern University
- Shenyang 110819
- China
| | - Ziyang Qiu
- State Environmental Protection Key Laboratory of Eco-Industry
- Northeastern University
- Shenyang 110819
- China
| | - Tao Du
- State Environmental Protection Key Laboratory of Eco-Industry
- Northeastern University
- Shenyang 110819
- China
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Maleki A, Mohammad M, Emdadi Z, Asim N, Azizi M, Safaei J. Adsorbent materials based on a geopolymer paste for dye removal from aqueous solutions. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.08.011] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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24
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Preparation of magnetic photocatalysts from TiO2, activated carbon and iron nitrate for environmental remediation. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111907] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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25
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Abdollah F, Borghei SM, Moniri E, Kimiagar S, Panahi HA. Laser irradiation for controlling size of TiO 2-Zeolite nanocomposite in removal of 2,4-dichlorophenoxyacetic acid herbicide. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 80:864-873. [PMID: 31746793 DOI: 10.2166/wst.2019.333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study focused on the synthesis of TiO2-Zeolite nanocomposite through a sol-gel approach. The decrease in the size of the nanocomposite is considered a primary parameter to improve photocatalytic activity. In this regard, fabricated samples were exposed to laser irradiation (532 nm) for four different time intervals in order to investigate the size variation of the nanocomposite. FTIR, UV-Vis, XRD, DLS, SEM and EDX analyses were applied to characterize and determine the size of the products. An optimized nanocomposite sample, in term of the particle size, was used for photodegradation of 2,4-D herbicide from aqueous solution. Photodegradation was carried out under UV irradiation (12 W) and Xe lamp irradiation (200 W). The obtained results showed that laser irradiation time has a substantial effect on controlling the size of the nanocomposite. Results from the photocatalyst study indicated that the elimination of 2,4-D under the Xe lamp irradiation was higher compared with the UV irradiation. Also, the final synthesized nanocomposite exhibited higher catalytic activity for photodegradation of 2,4-D compared with pure Zeolite and pure anatase TiO2 samples. The reusability of TiO2-Zeolite nanocomposite was studied in four successive cycles to evaluate the removal of 2,4-D under UV irradiation.
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Affiliation(s)
- Fatemeh Abdollah
- Department of Environmental Engineering, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Seyed Mehdi Borghei
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | - Elham Moniri
- Department of Chemistry, Varamin (Pishva) Branch, Islamic Azad University, Pishva, Iran E-mail:
| | - Salimeh Kimiagar
- Nano Research Laboratory (NRL), Physics Department, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Homayon Ahmad Panahi
- Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran
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Xu J, Zhang T. Fabrication of spent FCC catalyst composites by loaded V 2O 5 and TiO 2 and their comparative photocatalytic activities. Sci Rep 2019; 9:11099. [PMID: 31366969 PMCID: PMC6668428 DOI: 10.1038/s41598-019-47155-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 07/11/2019] [Indexed: 11/09/2022] Open
Abstract
The spent fluid catalytic cracking catalyst (FCC) has been loaded with different content of V2O5 and TiO2 through a modified-impregnation method. X-ray Diffraction (XRD), ultraviolet-visible spectrophotometry (UV-Vis), Scanning Electron Microscope (SEM), and Fourier Transform Infrared spectroscopy (FT-IR) are used to characterize the structure and morphology of these samples. Their photocatalytic activity was evaluated by degradation of methylene blue (MB) solution under 300 W Xenon lamp irradiation. The interplanar spacing of the zeolite Y (111) plane is affected by the amount of the loaded V2O5 on spent FCC catalyst. The (111) plane of spent FCC catalyst loaded with V2O5 and TiO2 sample is 1.404 nm, which is higher than that of the zeolite Y (1.395 nm). The amount of adsorption of MB and the photocatalytic activity for the degradation increased with increasing the interplanar spacing of the (111) plane of sample. We fabricated of spent FCC catalyst composites by loaded V2O5 and TiO2, which effectively solved the spent FCC catalyst disposal problem. The efficiency of the developed sample provides a potentially economical way of degrading MB.
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Affiliation(s)
- Jiasheng Xu
- College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun, 113001, P.R. China. .,Liaoning Province Key Laboratory for Synthesis and Application of Functional Compounds, College of Chemistry and Chemical Engineering, Bohai University, Jinzhou, 121013, P.R. China.
| | - Te Zhang
- Liaoning Province Key Laboratory for Synthesis and Application of Functional Compounds, College of Chemistry and Chemical Engineering, Bohai University, Jinzhou, 121013, P.R. China
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Kakavandi B, Bahari N, Rezaei Kalantary R, Dehghani Fard E. Enhanced sono-photocatalysis of tetracycline antibiotic using TiO 2 decorated on magnetic activated carbon (MAC@T) coupled with US and UV: A new hybrid system. ULTRASONICS SONOCHEMISTRY 2019; 55:75-85. [PMID: 31084793 DOI: 10.1016/j.ultsonch.2019.02.026] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 01/31/2019] [Accepted: 02/28/2019] [Indexed: 06/09/2023]
Abstract
A combined system including sonocatalysis and photocatalysis was applied for catalytic degradation of tetracycline (TC) antibiotic using TiO2 decorated on magnetic activated carbon (MAC@T) in coupling with ultraviolet (UV) and ultrasound (US) irradiations. MAC was fabricated via magnetization of AC using Fe3O4 nanoparticles. FESEM, EDS, TEM, BET, XRD, PL, VSM and UV-visible DRS techniques were used to characterize the catalyst features. The performance of MAC@T/UV/US system was examined under impact of different input variable such as catalyst loading, solution pH, initial TC concentration, US power, scavenging agents, chemical oxidants and co-exiting anions. The degradation rate was enhanced substantially when MAC@T coupled with US and UV irradiations. At optimal conditions, over 93% TC and 50% TOC were removed under 180 min reaction. Whereas, the complete removal of TC was obtained after 60 min treatment, when MAC@T/UV/US coupled with oxidants. Decreasing sequence of the inhibitory effect of anions was chloride > bicarbonate > phosphate > nitrate > sulfate. Both Fe leaching and loss of the decontamination were slight with reused times, indicating MAC@T has a high stability and reusability. According to trapping tests, holes, OH and 1O2 were contributed in the degradation process. In conclusion, integration of MAC@T composite and US/UV for enhancing catalytic degradation efficiency can be introduced as a successful and promising technique, owing to excellent catalytic activity, easy recovery, good adsorption capacity and high durability and recycling potential.
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Affiliation(s)
- Babak Kakavandi
- Research Center for Health, Safety and Environment, Alborz University of Medical Sciences, Karaj, Iran; Department of Environmental Health Engineering, Alborz University of Medical Sciences, Karaj, Iran
| | - Niloufar Bahari
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Roshanak Rezaei Kalantary
- Research Center for Environmental Health Technology (RCEHT), Iran University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
| | - Emad Dehghani Fard
- Research Center for Health, Safety and Environment, Alborz University of Medical Sciences, Karaj, Iran; Department of Environmental Health Engineering, Alborz University of Medical Sciences, Karaj, Iran
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29
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Investigation of Microstructure and Photocatalytic Performance of a Modified Zeolite Supported Nanocrystal TiO2 Composite. Catalysts 2019. [DOI: 10.3390/catal9060502] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A modified zeolite/TiO2 composite (MZTC) was prepared through a method of saturated infiltration and synthesis in situ. The crystalline phase, micromorphology, elementary composition, specific surface area, pore size distribution, chemical bond and band gap variation of the products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), BET specific surface area and pore size distribution analysis (BET), Fourier transform infrared spectroscopy (FTIR) and UV–vis diffuse reflectance spectroscopy (UV-vis DRS), respectively. The microscopic characterization results showed that TiO2 was homogeneously dispersed in the structure of zeolite at the nanoscale range, and a strong chemical bond was established between TiO2 and zeolite. The photocatalytic performance of MZTC was evaluated by studying the degradation rate of methylene blue (MB) dye in aqueous solution under UV-light irradiation. The results of the degradation experiment showed that the MB degradation rate of MZTC-2.5 was the highest, reaching 93.6%, which was 2.4 times higher than hydrolysis TiO2 powder (HTOP) containing the same mass of pure TiO2. The MB degradation rate of MZTC-2.5 still maintained 86.5% after five tests, suggesting the excellent recyclability of MZTC-2.5. The possible mechanism of MB degradation was also discussed.
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30
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Evaluation of rice husk ash in adsorption of Remazol Red dye from aqueous media. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0436-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
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31
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Golshan M, Kakavandi B, Ahmadi M, Azizi M. Photocatalytic activation of peroxymonosulfate by TiO 2 anchored on cupper ferrite (TiO 2@CuFe 2O 4) into 2,4-D degradation: Process feasibility, mechanism and pathway. JOURNAL OF HAZARDOUS MATERIALS 2018; 359:325-337. [PMID: 30048947 DOI: 10.1016/j.jhazmat.2018.06.069] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 06/09/2018] [Accepted: 06/30/2018] [Indexed: 06/08/2023]
Abstract
A thorough study of photo-oxidation efficiency of TiO2@CuFe2O4 dissociating peroxymonosulfate (PMS) is reported in detail. The origin of high catalytic activity was discussed as evidence by numerous controlled trials and several operational parameters. Based on quenching tests, possible mechanism and pathway of degradation were proposed. 2,4-dichlorophenoxyacetic acid (2,4-D) degradation in TiO2@CuFe2O4/UV/PMS system could abide pseudo-first-order kinetics. Moreover, reaction rate constant (Kobs) showed a linear increasing trend as PMS and catalyst concentrations increased. Over 97.2% of 2,4-D (20 mg/L) was degraded within 60 min at 0.3 mM PMS and 0.1 g/L TiO2@CuFe2O4. However, the water matrix species inhibited 2,4-D degradation to different amounts and the inhibiting effect was as follows: HCO3- > NO3- > Cl- > SO42-. As-prepared catalyst showed a high ability of PMS activation, compared to other studied oxidants. Particularly, sulfate radicals were accounted for 2,4-D degradation in the catalytic oxidation reaction. TiO2@CuFe2O4 catalyst displayed the excellent recyclability and durability. Identification of intermediates and end-products brought about the conclusion that enhanced degradation involving dechlorination, dehydrogenation, hydroxylation, and ring cleavage, through SO4-, OH, O2- and holes attack during TiO2@CuFe2O4/PMS photocatalysis of 2,4-D. As conclusion, integration of TiO2, CuFe2O4 and UV light to efficient activation of PMS can be proposed as a successful and promising method to wastewater treatment effectively, because of the cogeneration of different reactive oxidizing species, simple and easy recovery of catalyst and good catalytic activity.
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Affiliation(s)
- Masoumeh Golshan
- Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Environmental Health Engineering, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Babak Kakavandi
- Research Center for Health, Safety and Environment, Alborz University of Medical Sciences, Karaj, Iran; Department of Environmental Health Engineering, Alborz University of Medical Sciences, Karaj, Iran
| | - Mehdi Ahmadi
- Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Environmental Health Engineering, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Minoo Azizi
- Department of Environmental Health Engineering, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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32
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Sun Q, Saratale RG, Saratale GD, Kim DS. Pristine and modified radix Angelicae dahuricae (Baizhi) residue for the adsorption of methylene blue from aqueous solution: A comparative study. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.05.108] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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33
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Optimization of Preparation Conditions of Novel Adsorbent from Sugar Scum Using Response Surface Methodology for Removal of Methylene Blue. J CHEM-NY 2018. [DOI: 10.1155/2018/2093654] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A novel and inexpensive adsorbent was prepared from sugar scum for the removal of methylene blue as an organic pollutant from aqueous solutions. The response surface methodology was used to study the effects of the calcination temperature and time on the yield and the methylene blue adsorption. In order to determine the optimal conditions of the preparation, the Doehlert design and desirability function were applied. The increase in calcination temperature increases the methylene blue adsorption and induces a reduction in yield. The optimal conditions have been identified to be a calcination temperature of 986°C and calcination time of 61 min. The characteristics of the obtained adsorbent were determined using SEM/EDX, and surface functions were obtained based on FTIR and pHpzc. The produced adsorbent had a porous structure and a pHpzc of 12.5. The results showed that the yield was 49.74% and the adsorption of methylene blue was 24.52 mg·g−1 with a contact time of 10 h determined by kinetic test. The sugar scum was found to be an effective material for the preparation of appropriate adsorbent for dye removal from wastewater.
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Youssef WM, Hagag MS, Ali AH. Synthesis, characterization and application of composite derived from rice husk ash with aluminium oxide for sorption of uranium. ADSORPT SCI TECHNOL 2018. [DOI: 10.1177/0263617418768920] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A composite of rice husk (RH), caustic soda and aluminium oxide was synthesized at 500°C. The activated carbon and amorphous silica dispersed over the aluminium oxide selectively adsorbed uranium in the presence of other elements. At equilibrium time 1 h, phase ratio S/L (0.1 g/10 ml), pH = 5 and uranium initial concentration 120.6 mg/l uranium adsorption efficiency was 96.35%. The uranium stripping efficiency from the load RHA–alumina composite fulfilled 99.9% at 1 h equilibrium time, a phase ratio (S/A) of 0.05 g/10 ml and 0.5 mol/l HNO3. The scanning electron microscopy photos revealed that the rice husk ash (RHA)–alumina composite has vacant or regular cavities before the adsorption, and the cavities are fully occupied by uranium after adsorption. The Fourier transform infrared spectroscopy shows a more broadening of the band υ = 3526 and 3462 cm−1 which was ascribed to the uranium adsorption. The composite adsorbed 93.75% of uranium from a waste sample. The uranium adsorption exhibited a Langmuir isotherm.
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35
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Study on preparation and visible-light activity of Ag–TiO2 supported by artificial zeolite. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-017-3249-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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36
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Nayak MC, Isloor AM, Moslehyani A, Ismail N, Ismail A. Fabrication of novel PPSU/ZSM-5 ultrafiltration hollow fiber membranes for separation of proteins and hazardous reactive dyes. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2017.11.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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37
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Elghniji K, Elaloui E, Moussaoui Y. Coating of anatase titania on clinoptilolite by metal organic chemical vapor deposition method: enhanced mesoporosity and photocatalytic activity. CHEMICAL PAPERS 2017. [DOI: 10.1007/s11696-017-0350-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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