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Lata NP, Hussain MS, Abdulla-Al-Mamun M, Rashid TU, Shamsuddin SM. Fabrication and synergistically enhanced photocatalytic activity of ternary kaolinite, TiO 2, and Al 2O 3 (K 65T 30A 5) nanocomposite for visible-light-induced degradation of methylene blue and remazol red dye. Heliyon 2024; 10:e29255. [PMID: 38681569 PMCID: PMC11046117 DOI: 10.1016/j.heliyon.2024.e29255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 03/23/2024] [Accepted: 04/03/2024] [Indexed: 05/01/2024] Open
Abstract
The ternary photocatalyst ((Al2Si2O5 (OH)4/TiO2/Al2O3) composites (where w/w = 65, 30, and 5 wt%) denoted K65T30A5 were successfully synthesized and examined for their efficiency in removing cationic (Methylene Blue, MB) and anionic (Remazol Red, RR) dye from aqueous medium under visible-light irradiation. A series of nanocomposites with varied wt% of kaolinite, TiO2, and Al2O3 were prepared through sonication followed by calcination at 600 °C. X-ray diffraction (XRD) analysis confirmed the crystallinity of the synthesized materials and established their average crystal size to be 83.87 nm. The morphological structure, composite molecule, and surface properties of the resulting K65T30A5 were characterized using FTIR, FE-SEM, and EDS analyses to confirm the successful fabrication of the nanocomposite. FTIR and EDS elemental mapping analyses confirmed the presence of Al, Si, Ti, and O elements in the nanocomposites. The composites exhibited photocatalytic behaviour across the UV-visible spectra, with values varying from the ultraviolet to the visible region with a sharp increase in reflectance at 510 nm. Near-complete degradation of MB (97.66 %) was achieved within 90 min at pH 9 and a 10 mg/L dye concentration, while RR removal reached 90.66 % within 120 min at pH 3.5 and the same dye concentration under visible light irradiation. The catalyst exhibited robust stability, retaining its efficiency by removing 85.09 % of MB and 80.21 % of RR dye after three reuse cycles. The composite catalyst discussed in this study emerges as a promising material for straightforward fabrication techniques, featuring a high percentage of kaolinite and proving to be a cost-effective solution for large-scale water and wastewater treatment processes.
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Affiliation(s)
- Nadira Parvin Lata
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Md. Sheum Hussain
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Md. Abdulla-Al-Mamun
- Institute of Leather Engineering and Technology, University of Dhaka, 44-50 Hazaribagh, Dhaka, 1209, Bangladesh
| | - Taslim Ur Rashid
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Sayed Md. Shamsuddin
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka, 1000, Bangladesh
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Din MI, Khalid R, Hussain Z, Arshad M, Khan SA. A critical review on application of organic, inorganic and hybrid nanophotocatalytic assemblies for photocatalysis of methyl orange dye in aqueous medium. REV CHEM ENG 2022. [DOI: 10.1515/revce-2022-0026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Abstract
Methyl orange (MO) is a highly carcinogenic and harmful contaminant, which has been extensively reported for its detrimental impact on human and aquatic life. The photodegradation of MO into less toxic products has gained much attention over the past few decades. Herein we have reviewed the recent advancement in designing of nanomaterials (NMs) stabilized on different fabricating assemblies and their application in photocatalysis of MO dye. These photocatalytic systems possess various advantages and disadvantages. Graphene-based supported materials on different NMs are highly reported photocatalysts for photocatalysis of MO dye. Recent advancement, parameters affecting photocatalytic studies, kinetics and photocatalytic mechanism of MO have been thoroughly explained in this review. Future outcomes are also provided for extending the development of scientific research in this field.
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Affiliation(s)
| | - Rida Khalid
- School of Chemistry , University of Punjab , Lahore , 54590 , Pakistan
| | - Zaib Hussain
- School of Chemistry , University of Punjab , Lahore , 54590 , Pakistan
| | - Muhammad Arshad
- Institute of Chemistry , The Islamia University of Bahawalpur, Baghdad-ul-Jadeed Campus , Bahawalpur , 63100 , Pakistan
| | - Safyan A. Khan
- Center of Research Excellence in Nanotechnology , King Fahd University of Petroleum & Minerals , Dhahran , 31261 , Saudi Arabia
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Novel Magnetic Nanocomposites Based on Carboxyl-Functionalized SBA-15 Silica for Effective Dye Adsorption from Aqueous Solutions. NANOMATERIALS 2022; 12:nano12132247. [PMID: 35808082 PMCID: PMC9268668 DOI: 10.3390/nano12132247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 06/24/2022] [Accepted: 06/26/2022] [Indexed: 02/04/2023]
Abstract
In this study, three novel magnetic nanocomposites based on carboxyl-functionalized SBA-15 silica and magnetite nanoparticles were prepared through an effective and simple procedure and applied for methylene blue (MB) and malachite green G (MG) adsorption from single and binary solutions. Structure, composition, morphology, magnetic, and textural properties of the composites were thoroughly investigated. The influence of the amount of carboxyl functional groups on the physicochemical and adsorptive properties of the final materials was investigated. The capacity of the synthesized composites to adsorb MB and MG from single and binary solutions and the factors affecting the adsorption process, such as contact time, solution pH, and dye concentration, were assessed. Kinetic modelling showed that the dye adsorption mechanism followed the pseudo-second-order kinetic model, indicating that adsorption was a chemically controlled multilayer process. The adsorption rate was simultaneously controlled by external film diffusion and intraparticle diffusion. It was evidenced that the molecular geometry of the dye molecule plays a major role in the adsorption process, with the planar geometry of the MB molecule favoring adsorption. The analysis of equilibrium data revealed the best description of MB adsorption behavior by the Langmuir isotherm model, whereas the Freundlich model described better the MG adsorption.
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Ferreira AVDTPF, Barbosa LV, de Souza SD, Ciuffi KJ, Vicente MA, Trujillano R, Korili SA, Gil A, de Faria EH. Titania-triethanolamine-kaolinite nanocomposites as adsorbents and photocatalysts of herbicides. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
The use of titania-based composite materials in the field of heterogeneous catalysis and photocatalysis has a long and rich history. Hybrid structures combining titania nanoparticles with clay minerals have been extensively investigated for nearly four decades. The attractiveness of clay minerals as components of functional materials stems primarily from their compositional versatility and the possibility of using silicate lamellae as prefabricated building blocks ready to be fitted into the desired nanoconstruction. This review focuses on the evolution over the years of synthetic strategies employed for the manufacturing of titania–clay mineral composites with particular attention to the role of the adopted preparative approach in shaping the physical and chemical characteristics of the materials and enabling, ultimately, tuning of their catalytic and/or photocatalytic performance.
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Caglar B, Guner EK, Özdokur KV, Özdemir AO, İçer F, Caglar S, Doğan B, Beşer BM, Çırak Ç, Tabak A, Ersoy S. Application of BiFeO3 and Au/BiFeO3 decorated kaolinite nanocomposites as efficient photocatalyst for degradation of dye and electrocatalyst for oxygen reduction reaction. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113400] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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de Oliveira CRS, Batistella MA, Ulson de Souza AA, Ulson de Souza SMDAG. Synthesis of superacid sulfated TiO2 prepared by sol-gel method and its use as a titania precursor in obtaining a kaolinite/TiO2 nano-hybrid composite. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2020.11.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Ahmad S, Yasin A. Photocatalytic degradation of deltamethrin by using Cu/TiO2/bentonite composite. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.07.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Santamaría L, Vicente MA, Korili SA, Gil A. Effect of the preparation method and metal content on the synthesis of metal modified titanium oxide used for the removal of salicylic acid under UV light. ENVIRONMENTAL TECHNOLOGY 2020; 41:2073-2084. [PMID: 30501486 DOI: 10.1080/09593330.2018.1555285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Accepted: 11/28/2018] [Indexed: 06/09/2023]
Abstract
Titanium dioxide modified with Ag and Fe was synthesized using two preparation methods, characterized and applied to the photocatalytic degradation of salicylic acid in aqueous solution. The modified TiO2 samples were prepared by the sol-gel and wet impregnation methods starting from titanium(IV) isopropoxide and using AgNO3 and Fe(NO3)3·9H2O as precursors of the modifiers, with their content varying between 0 and 5 wt.%. Catalysts characterization was based on powder X-ray diffraction (PXRD), nitrogen physisorption at 77 K, temperature programmed reduction (H2-TPR), chemisorption of NH3 at 343 K and X-ray photoelectron spectroscopy (XPS). The photocatalytic degradation of salicylic acid by modified TiO2 was investigated under ultraviolet irradiation at 298 K considering various concentrations of the catalyst, between 100 and 1000 mgcatalyst/dm3, and of the organic molecule, between 0 and 15 mg/dm3. The catalysts most active in the degradation of salicylic acid were those having the highest Fe content.
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Affiliation(s)
- L Santamaría
- INAMAT-Departamento de Ciencias, Edificio de los Acebos, Universidad Pública de Navarra Pamplona, Spain
| | - M A Vicente
- GIR-QUESCAT, Departamento de Química Inorgánica, Universidad de Salamanca, Salamanca, Spain
| | - S A Korili
- INAMAT-Departamento de Ciencias, Edificio de los Acebos, Universidad Pública de Navarra Pamplona, Spain
| | - A Gil
- INAMAT-Departamento de Ciencias, Edificio de los Acebos, Universidad Pública de Navarra Pamplona, Spain
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Mora LD, Bonfim LF, Barbosa LV, da Silva TH, Nassar EJ, Ciuffi KJ, González B, Vicente MA, Trujillano R, Rives V, Pérez-Bernal ME, Korili S, Gil A, de Faria EH. White and Red Brazilian São Simão's Kaolinite-TiO 2 Nanocomposites as Catalysts for Toluene Photodegradation from Aqueous Solutions. MATERIALS 2019; 12:ma12233943. [PMID: 31795158 PMCID: PMC6926498 DOI: 10.3390/ma12233943] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/20/2019] [Accepted: 11/26/2019] [Indexed: 11/16/2022]
Abstract
The presence of volatile organic compounds in groundwater is a major concern when it is used as a drinking water source because many of these compounds can adversely affect human health. This work reports on the preparation and characterization of white and red Brazilian São Simão's kaolinite-TiO2 nanocomposites and their use as catalysts in the photochemical degradation of toluene, a significant volatile organic compound. The nanocomposites were prepared by a sol-gel procedure, using titanium bis(triethanolaminate)diisopropoxide as a precursor. Thermal treatments of the nanocomposites led to different polymorphic titania phases, while the clay changed from kaolinite to metakaolinite. This structural evolution strongly affected the photocatalytic degradation behavior-all the solids efficiently degraded toluene and the solid calcined at 400 °C, formed by kaolinite and anatase, showed the best behavior (90% degradation). On extending the photochemical treatment up to 48 h, high mineralization levels were reached. The advantage of photodegradation using the nanocomposites was confirmed by comparing the results from isolated components (titanium dioxide and kaolinite) to observe that the nanocomposites displayed fundamental importance to the photodegradation pathways of toluene.
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Affiliation(s)
- Lucas D. Mora
- Grupo de Pesquisas em Materiais Lamelares Híbridos (GPMatLam), Universidade de Franca (Unifran), Av. Dr. Armando Salles Oliveira, 201 Parque Universitário, Franca-SP 14404-600, Brazil; (L.D.M.); (L.F.B.); (L.V.B.); (T.H.d.S.); (E.J.N.); (K.J.C.)
| | - Larissa F. Bonfim
- Grupo de Pesquisas em Materiais Lamelares Híbridos (GPMatLam), Universidade de Franca (Unifran), Av. Dr. Armando Salles Oliveira, 201 Parque Universitário, Franca-SP 14404-600, Brazil; (L.D.M.); (L.F.B.); (L.V.B.); (T.H.d.S.); (E.J.N.); (K.J.C.)
| | - Lorrana V. Barbosa
- Grupo de Pesquisas em Materiais Lamelares Híbridos (GPMatLam), Universidade de Franca (Unifran), Av. Dr. Armando Salles Oliveira, 201 Parque Universitário, Franca-SP 14404-600, Brazil; (L.D.M.); (L.F.B.); (L.V.B.); (T.H.d.S.); (E.J.N.); (K.J.C.)
| | - Tiago H. da Silva
- Grupo de Pesquisas em Materiais Lamelares Híbridos (GPMatLam), Universidade de Franca (Unifran), Av. Dr. Armando Salles Oliveira, 201 Parque Universitário, Franca-SP 14404-600, Brazil; (L.D.M.); (L.F.B.); (L.V.B.); (T.H.d.S.); (E.J.N.); (K.J.C.)
| | - Eduardo J. Nassar
- Grupo de Pesquisas em Materiais Lamelares Híbridos (GPMatLam), Universidade de Franca (Unifran), Av. Dr. Armando Salles Oliveira, 201 Parque Universitário, Franca-SP 14404-600, Brazil; (L.D.M.); (L.F.B.); (L.V.B.); (T.H.d.S.); (E.J.N.); (K.J.C.)
| | - Katia J. Ciuffi
- Grupo de Pesquisas em Materiais Lamelares Híbridos (GPMatLam), Universidade de Franca (Unifran), Av. Dr. Armando Salles Oliveira, 201 Parque Universitário, Franca-SP 14404-600, Brazil; (L.D.M.); (L.F.B.); (L.V.B.); (T.H.d.S.); (E.J.N.); (K.J.C.)
| | - Beatriz González
- GIR-QUESCAT, Dep. de Química Inorgánica, Universidad de Salamanca, E–37008 Salamanca, Spain; (B.G.); (M.A.V.); (R.T.); (V.R.); (M.E.P.-B.)
| | - Miguel A. Vicente
- GIR-QUESCAT, Dep. de Química Inorgánica, Universidad de Salamanca, E–37008 Salamanca, Spain; (B.G.); (M.A.V.); (R.T.); (V.R.); (M.E.P.-B.)
| | - Raquel Trujillano
- GIR-QUESCAT, Dep. de Química Inorgánica, Universidad de Salamanca, E–37008 Salamanca, Spain; (B.G.); (M.A.V.); (R.T.); (V.R.); (M.E.P.-B.)
| | - Vicente Rives
- GIR-QUESCAT, Dep. de Química Inorgánica, Universidad de Salamanca, E–37008 Salamanca, Spain; (B.G.); (M.A.V.); (R.T.); (V.R.); (M.E.P.-B.)
| | - Maria Elena Pérez-Bernal
- GIR-QUESCAT, Dep. de Química Inorgánica, Universidad de Salamanca, E–37008 Salamanca, Spain; (B.G.); (M.A.V.); (R.T.); (V.R.); (M.E.P.-B.)
| | - Sophia Korili
- INAMAT, Departamento de Ciencias, Universidad Pública de Navarra, E–31006 Pamplona, Spain; (S.K.); (A.G.)
| | - Antonio Gil
- INAMAT, Departamento de Ciencias, Universidad Pública de Navarra, E–31006 Pamplona, Spain; (S.K.); (A.G.)
| | - Emerson H. de Faria
- Grupo de Pesquisas em Materiais Lamelares Híbridos (GPMatLam), Universidade de Franca (Unifran), Av. Dr. Armando Salles Oliveira, 201 Parque Universitário, Franca-SP 14404-600, Brazil; (L.D.M.); (L.F.B.); (L.V.B.); (T.H.d.S.); (E.J.N.); (K.J.C.)
- Correspondence: ; Tel.: +55-16-3711-8969
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Exfoliated kaolinite nanolayers as an alternative photocatalyst with superb activity. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 2019. [DOI: 10.1016/j.jece.2019.103174] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Ruiz-Hitzky E, Aranda P, Akkari M, Khaorapapong N, Ogawa M. Photoactive nanoarchitectures based on clays incorporating TiO 2 and ZnO nanoparticles. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2019; 10:1140-1156. [PMID: 31293852 PMCID: PMC6604728 DOI: 10.3762/bjnano.10.114] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 05/14/2019] [Indexed: 05/20/2023]
Abstract
Thought as raw materials clay minerals are often disregarded in the development of advanced materials. However, clays of natural and synthetic origin constitute excellent platforms for developing nanostructured functional materials for numerous applications. They can be easily assembled to diverse types of nanoparticles provided with magnetic, electronic, photoactive or bioactive properties, allowing to overcome drawbacks of other types of substrates in the design of functional nanoarchitectures. Within this scope, clays can be of special relevance in the production of photoactive materials as they offer an advantageous way for the stabilization and immobilization of diverse metal-oxide nanoparticles. The controlled assembly under mild conditions of titanium dioxide and zinc oxide nanoparticles with clay minerals to give diverse clay-semiconductor nanoarchitectures are summarized and critically discussed in this review article. The possibility to use clay minerals as starting components showing different morphologies, such as layered, fibrous, or tubular morphologies, to immobilize these types of nanoparticles mainly plays a role in i) the control of their size and size distribution on the solid surface, ii) the mitigation or suppression of the nanoparticle aggregation, and iii) the hierarchical design for selectivity enhancements in the catalytic transformation and for improved overall reaction efficiency. This article tries also to present new steps towards more sophisticated but efficient and highly selective functional nanoarchitectures incorporating photosensitizer elements for tuning the semiconductor-clay photoactivity.
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Affiliation(s)
- Eduardo Ruiz-Hitzky
- Materials Science Institute of Madrid, CSIC, C/ Sor Juana Inés de la Cruz 3, Cantoblanco, 28027 Madrid, Spain
| | - Pilar Aranda
- Materials Science Institute of Madrid, CSIC, C/ Sor Juana Inés de la Cruz 3, Cantoblanco, 28027 Madrid, Spain
| | - Marwa Akkari
- Materials Science Institute of Madrid, CSIC, C/ Sor Juana Inés de la Cruz 3, Cantoblanco, 28027 Madrid, Spain
- Laboratory of Nanomaterials and Renewable Energy Systems. Research and Technology Center of Energy, Borj-Cedria Science and Technology Park, BP 95, 2050 Hammam-Lif, Tunisia
| | - Nithima Khaorapapong
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Makoto Ogawa
- School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), 555 Moo 1 Payupnai, Wangchan, Rayong 21210, Thailand
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Photodegradation of 1,2,4-Trichlorobenzene on Montmorillonite–TiO2 Nanocomposites. CHEMENGINEERING 2018. [DOI: 10.3390/chemengineering2020022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Liu X, Bai M. Effect of chemical composition on the surface charge property and flotation behavior of pyrophyllite particles. ADV POWDER TECHNOL 2017. [DOI: 10.1016/j.apt.2016.12.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Gao H, Song Z, Zhang W, Yang X, Wang X, Wang D. Synthesis of highly effective absorbents with waste quenching blast furnace slag to remove Methyl Orange from aqueous solution. J Environ Sci (China) 2017; 53:68-77. [PMID: 28372762 DOI: 10.1016/j.jes.2016.05.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/23/2016] [Accepted: 05/24/2016] [Indexed: 06/07/2023]
Abstract
Water quenching blast furnace slag (WQBFS) is widely produced in the blast furnace iron making process. It is mainly composed of CaO, MgO, Al2O3, and SiO2 with low contents of other metal elements such as Fe, Mn, Ti, K and Na. In this study, WQBFS was treated with grinding, hydrochloric acid acidification, filtration, filtrate extraction by alkali liquor and a hydration reaction. Then BFS micropowder (BFSMP), BFS acidified solid (BFSAS) and BFS acid-alkali precipitate (BFSAP) were obtained, which were characterized by X-ray diffraction, scanning electron microscopy, X-ray fluorescence and Brunauer-Emmet-Teller (BET) specific surface area. The decoloration efficiency for Methyl Orange (MO) was used to evaluate the adsorptive ability of the three absorbents. The effects of adsorptive reaction conditions (pH and temperature of solution, reaction time, sorbent dosage and initial concentration) on MO removal were also investigated in detail. The results indicated that BFSAP performed better in MO removal than the other two absorbents. When the pH value of MO solutions was in the range 3.0-13.0, the degradation efficiency of a solution with initial MO concentration of 25mg/L reached 99.97% for a reaction time of 25min at 25°C. The maximum adsorption capacity of BFSAP for MO was 167mg/g. Based on optimized experiments, the results conformed with the Langmuir adsorption isotherm and pseudo-second-order kinetics. Among inorganic anions, SO42- and PO43- had significant inhibitory effects on MO removal in BFSAP treatment due to ion-exchange adsorption.
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Affiliation(s)
- Hongyu Gao
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for co-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhenzhen Song
- Technology Center, ZhongYang Steel Co., Ltd., Zhongyang 033400, China
| | - Weijun Zhang
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China.
| | - Xiaofang Yang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for co-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Xuan Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Dongsheng Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for co-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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Cao X, Luo S, Liu C, Chen J. Synthesis of Bentonite-Supported Fe 2 O 3 -Doped TiO 2 superstructures for highly promoted photocatalytic activity and recyclability. ADV POWDER TECHNOL 2017. [DOI: 10.1016/j.apt.2017.01.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Photocatalytic Decolorization of Dye Effluent Using Radiation Developed Polymeric Nanocomposites. J Inorg Organomet Polym Mater 2016. [DOI: 10.1007/s10904-016-0346-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Oliveira LKD, Molina EF, Moura ALA, de Faria EH, Ciuffi KJ. Synthesis, Characterization, and Environmental Applications of Hybrid Materials Based on Humic Acid Obtained by the Sol-Gel Route. ACS APPLIED MATERIALS & INTERFACES 2016; 8:1478-1485. [PMID: 26700414 DOI: 10.1021/acsami.5b10810] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Humic acids (HAs) are ubiquitous macromolecules in the environment. Due to their high contents of oxygenated functional groups, they can interact with contaminants present in the natural environment and therefore influence the behavior of pollutants. However, a pH of 2 or lower is required to maintain HAs in the solid form. To increase the stability of HAs and their capacity to bind to contaminants, this work proposes the development of new hybrid materials based on alkoxysilanes and HAs for environmental applications such as dye adsorption. Three different materials with new functional groups were prepared by employing the following alkoxysilanes: tetraethyl orthosilicate, (3-aminopropyl)triethoxysilane, and N-[3-(trimethoxylsilyl)propyl]ethylenediamine. The final materials were denoted HWA, HOA, and HTA, respectively, and they were characterized by elemental analysis, diffuse reflectance Fourier-transform infrared spectroscopy (DRIFT), small-angle X-ray scattering (SAXS), scanning electron microscopy (SEM), and N2 gas-volumetric adsorption. The point of zero charge (pzc) and stability of these materials were also determined. Their selectivity was evaluated in adsorption experiments performed with two different charged dyes in aqueous medium, namely anionic rose bengal (RB) and cationic methylene blue (MB). The elemental, DRIFT, SAXS, SEM, and textural analyses confirmed the presence of a combination of the features of HAs and alkoxysilanes. The pzc results showed that the new materials displayed different characteristics and affinities. All the materials were stable in aqueous solution up to pH 10. For MB, the percentage removal values obtained by using HWA, HOA, and HTA were 98, 85, and 67%, respectively. As for RB, the percentage removal values were 19, 18, and 44% for HWA, HOA, and HTA, respectively. These hybrid materials have potential use as adsorbents for the removal of cationic or anionic species and could be viable alternatives to remove various substances present as contaminants in natural environments.
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Affiliation(s)
| | - Eduardo Ferreira Molina
- Universidade de Franca , Av. Armando Salles Oliveira 201, 14404-600 Franca, São Paulo Brazil
| | - André L A Moura
- Universidade de Franca , Av. Armando Salles Oliveira 201, 14404-600 Franca, São Paulo Brazil
| | | | - Katia Jorge Ciuffi
- Universidade de Franca , Av. Armando Salles Oliveira 201, 14404-600 Franca, São Paulo Brazil
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Khoshnavazi R, Fereydouni S, Bahrami L. Enhanced photocatalytic activity of nanocomposites of TiO2 doped with Zr, Y or Ce polyoxometalates for degradation of methyl orange dye. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 73:1746-1755. [PMID: 27054748 DOI: 10.2166/wst.2016.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The synergistic effect of polyoxometalate (POM) and metal-doped TiO2 (metal = Zr, Y and Ce) was examined, to fabricate nanocomposites with enhanced photocatalytic activities toward the degradation of methyl orange (MO), as a model textile dye. A series of new nanocomposites, containing different loading amounts of H9Na3[WZn3(H2O)2(ZnW9O34)2].24H2O (HZnW) (10-30%) on each of the metal-doped TiO2 nanoparticles, were synthesized using impregnation method. The morphology and crystal phase of the as-prepared nanocomposites were investigated by various characterization techniques: Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy-dispersive X-ray analysis and diffuse reflectance spectroscopy, indicating that the HZnW and metal-doped TiO2 had been successfully incorporated into the nanocomposite structure. The effects of parameters such as loading amount of HZnW, catalyst dose, pH and initial concentration of dye solution were investigated on the degradation kinetics and it was interestingly found that the prepared nanocomposites could efficiently degrade the MO dye in 5-7 min under UV light irradiation. The best results were obtained for the HZnW-Zr-TiO2 among the different nanocomposites. Also, control studies showed the superior photocatalytic properties of composites compared to that of the individual components. The facile preparation and their improved photocatalytic activities suggest that these materials can have a promising future for water and wastewater purifications.
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Affiliation(s)
- Roushan Khoshnavazi
- Department of Chemistry, University of Kurdistan, PO Box 66135-416, Sanandaj, Iran E-mail: ;
| | - Shler Fereydouni
- Department of Chemistry, University of Kurdistan, PO Box 66135-416, Sanandaj, Iran E-mail: ;
| | - Leila Bahrami
- Department of Chemistry, University of Kurdistan, PO Box 66135-416, Sanandaj, Iran E-mail: ;
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