1
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Burratti L, Sgreccia E, Bertelà F, Galiano F. Metal nanostructures in polymeric matrices for optical detection and removal of heavy metal ions, pesticides and dyes from water. CHEMOSPHERE 2024; 362:142636. [PMID: 38885767 DOI: 10.1016/j.chemosphere.2024.142636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Revised: 06/14/2024] [Accepted: 06/15/2024] [Indexed: 06/20/2024]
Abstract
Water pollutants such as heavy metal ions, pesticides, and dyes pose a worldwide issue. Their presence in water resources interferes with the normal growth mechanisms of living beings and causes long or short-term diseases. For this reason, research continuously tends to develop innovative, selective, and efficient processes or technologies to detect and remove pollutants from water. This review provides an up-to-date overview on metal nanoparticles loaded in polymeric matrices, such as hydrogels and membranes, and employed as optical sensors and as removing materials for water pollutants. The synthetic pathways of nanomaterials loading into polymeric matrices have been analyzed, particularly focusing on noble metal nanoparticles, noble metal nanoclusters, and metal oxide nanoparticles. Moreover, the sensing properties of modified matrices towards water pollutants have been discussed in addition to the interaction mechanisms between the sensors and the toxic compounds. The last part of the review has been devoted to illustrating the separation mechanism and removal performance of membranes loaded with nanomaterials in the treatment and purification of water streams from different contaminants (heavy metals, dyes and pesticides).
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Affiliation(s)
- Luca Burratti
- Faculty of Science, Technology and Innovation of the University "Mercatorum", Piazza Mattei 10, 00186, Rome (RM), Italy
| | - Emanuela Sgreccia
- Industrial Engineering Department, University of Rome Tor Vergata, Via del Politecnico 1, 00133, Rome (RM), Italy
| | - Federica Bertelà
- Department of Sciences, Roma Tre University of Rome, Via della Vasca Navale 79, 00146, Rome (RM), Italy
| | - Francesco Galiano
- Institute on Membrane Technology, ITM-CNR, Via P. Bucci, Cubo 17/C, 87036, Rende (CS), Italy.
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2
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Zhang C, Nie L, Wang J, Wang B. TiO 2-PAA-SiO 2 pearl chain blend modified polyvinylidene fluoride ultrafiltration membrane with excellent oil-water separation, anti fouling performance and durability. ENVIRONMENTAL TECHNOLOGY 2023:1-26. [PMID: 37961915 DOI: 10.1080/09593330.2023.2283804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023]
Abstract
In this work, a new type of composite nanoparticles, 'pearl chain', was developed by linking titanium dioxide and silicon dioxide by polyacrylic acid polymer chains, and the prepared TiO2-PAA-SiO2 composite nanoparticles were analysed by SEM, Fourier transform infrared spectroscopy, x-ray photoelectron spectroscopy and thermogravimetric analysis, zeta potential, x-ray diffraction, etc. The success of this work was verified by the successful linking of TiO2-PAA-SiO2 composite nanoparticles.TiO2-PAA-SiO2 composite nanoparticles were analysed to verify the successful attachment of pearl chains. The obtained TiO2-PAA-SiO2 were subsequently blended in different ratios to prepare polyvinylidene fluoride (PVDF) ultrafiltration membranes. The membrane performance was tested by porosity and water contact angle measurements, scanning electron microscopy, as well as experiments using bovine serum proteins and MTBE interception. The results showed that when a certain amount of TiO2-PAA-SiO2 was added, the surface wettability, porosity and permeability of the prepared modified composite membranes were significantly improved, and the BSA adsorption rate was increased from 71.59% to 80.86%, and the retention rate of MTBE was increased by 77%, in addition to showing a better anti-pollution effect (FRR: 91.07%). It was finally concluded that the prepared membranes embedded with 1.0 wt.% TiO2-PAA-SiO2 nanofillers showed good overall filtration performance, better contamination resistance and remarkable durability. The present work successfully demonstrated the feasibility of using polyacrylic acid chemical chains to connect nanoparticles with different functions to prevent particle loss and substantially enhance membrane performance, which is valuable for bridging connection of composite nanoparticles and exploring the development of high-performance ultrafiltration membranes.
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Affiliation(s)
- Chenxiao Zhang
- School of Ship and Marine Transportation, Zhejiang Ocean University, Zhoushan, People's Republic of China
| | - Lihong Nie
- School of Petrochemical and Environment, Zhejiang Ocean University, Zhoushan, People's Republic of China
| | - Jiafan Wang
- School of Petrochemical and Environment, Zhejiang Ocean University, Zhoushan, People's Republic of China
| | - Beifu Wang
- School of Petrochemical and Environment, Zhejiang Ocean University, Zhoushan, People's Republic of China
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Casetta J, Pochat-Bohatier C, Cornu D, Bechelany M, Miele P. Enhancing Water Treatment Performance of Porous Polysulfone Hollow Fiber Membranes through Atomic Layer Deposition. Molecules 2023; 28:6133. [PMID: 37630385 PMCID: PMC10458008 DOI: 10.3390/molecules28166133] [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: 07/12/2023] [Revised: 08/11/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023] Open
Abstract
Polysulfone (PSF) is one of the most used polymers for water treatment membranes, but its intrinsic hydrophobicity can be detrimental to the membranes' performances. By modifying a membrane's surface, it is possible to adapt its physicochemical properties and thus tune the membrane's hydrophilicity or porosity, which can achieve improved permeability and antifouling efficiency. Atomic layer deposition (ALD) stands as a distinctive technology offering exceedingly even and uniform layers of coatings, like oxides that cover the surfaces of objects with three-dimensional (3D) shapes, porous structures, and particles. In the context of this study, the focus was on titanium dioxide (TiO2), zinc oxide (ZnO), and alumina (Al2O3), which were deposited on polysulfone hollow fiber (HF) membranes via ALD using TiCl4, diethyl zinc (DEZ), and trimethylamine (TMA), respectively, and H2O as precursors. The morphology and mechanical properties of membranes were changed without damaging their performances. The deposition was confirmed mainly by energy-dispersive X-ray spectroscopy (EDX). All depositions offered great performances with a maintained permeability and BSA retention and a 20 to 40° lower water contact angle (WCA) than the raw PSF HF membrane. The deposition of TiO2 offered the best results, showing an enhancement of 50% for the water permeability and 20% for the fouling resistance of the PSF HF membranes.
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Affiliation(s)
- Jeanne Casetta
- Institut Européen des Membranes—IEM, UMR-5635, University of Montpellier, ENSCM, CNRS, Place Eugene Bataillon, 34095 Montpellier, France; (J.C.); (D.C.); (P.M.)
| | - Céline Pochat-Bohatier
- Institut Européen des Membranes—IEM, UMR-5635, University of Montpellier, ENSCM, CNRS, Place Eugene Bataillon, 34095 Montpellier, France; (J.C.); (D.C.); (P.M.)
| | - David Cornu
- Institut Européen des Membranes—IEM, UMR-5635, University of Montpellier, ENSCM, CNRS, Place Eugene Bataillon, 34095 Montpellier, France; (J.C.); (D.C.); (P.M.)
| | - Mikhael Bechelany
- Institut Européen des Membranes—IEM, UMR-5635, University of Montpellier, ENSCM, CNRS, Place Eugene Bataillon, 34095 Montpellier, France; (J.C.); (D.C.); (P.M.)
- Applied Mathematics and Bioinformatics (CAMB), Gulf University for Science and Technology—GUST, Kuwait City 32093, Kuwait
| | - Philippe Miele
- Institut Européen des Membranes—IEM, UMR-5635, University of Montpellier, ENSCM, CNRS, Place Eugene Bataillon, 34095 Montpellier, France; (J.C.); (D.C.); (P.M.)
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Casetta J, Gonzalez Ortiz D, Pochat-Bohatier C, Bechelany M, Miele P. Atomic layer deposition of TiO2 on porous polysulfone hollow fibers membranes for water treatment. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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Sboui M, Niu W, Lu G, Zhang K, Pan JH. Electrically conductive TiO 2/CB/PVDF membranes for synchronous cross-flow filtration and solar photoelectrocatalysis. CHEMOSPHERE 2023; 310:136753. [PMID: 36216114 DOI: 10.1016/j.chemosphere.2022.136753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 09/20/2022] [Accepted: 10/02/2022] [Indexed: 06/16/2023]
Abstract
Combining photocatalysis (PC) and membrane filtration (MF) has emerged as an attractive technology for water purification, however, the water purification efficiency and membrane fouling are still challenging. Herein, we report a novel photoelectrocatalytic (PEC) membrane mediated by a ternary polyvinylidene fluoride (PVDF)-carbon black (CB)-TiO2 composite conductive membrane synthesized by a phase inversion method assisted by the mixed surfactants of polyvinylpyrrolidone (PVP) and sodium dodecyl sulfate (SDS). The resultant electrically conductive TiO2/CB/PVDF membrane features a homogeneous surface with obvious pore size of 20-150 nm, a thickness ∼116 μm, and an average resistivity as low as ∼3.165 Ω∙m. The cooperation of PVP and SDS surfactants dramatically improves the organic-inorganic interactions and thus eventually enhances the porosity, stability of porous structure, mechanical stability, and conductivity and electrochemical properties of the hybrid membrane. Upon the solvent evaperation of the wellblended casting solution and the phase inversion, TiO2/CB preferentially exist on the surface of PVDF membrane, enabling the efficient PEC degradation of organic pollutants. The synergistic coupling of TiO2 and CB in PVDF membrane results in efficient PEC properties with bi-functional membrane antifouling and enhanced water purification in azo dyes decolorization under the stationary mode and in our lab-made continuous cross-flow PEC system, superior to those by photocatalysis and electrocatalysis. The developed synchronous MF and PEC system mediated by the conductive TiO2/CB/PVDF membrane proves to a feasible route to improving the self-cleaning properties of the polymer membrane while simultaneously increasing the water decontaminating efficiency.
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Affiliation(s)
- Mouheb Sboui
- Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University, Beijing, 102206, China; College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China
| | - Wenke Niu
- Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University, Beijing, 102206, China
| | - Gui Lu
- Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University, Beijing, 102206, China; School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing, 102206, China.
| | - Kai Zhang
- School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing, 102206, China
| | - Jia Hong Pan
- Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University, Beijing, 102206, China; College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China; Department of Chemistry and Centre for Processable Electronics, Imperial College London, White City Campus, London, W12 0BZ, UK.
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6
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Zhang G, Yu Y, Tu Y, Liu Y, Huang J, Yin X, Feng Y. Preparation of reusable UHMWPE/TiO2 photocatalytic microporous membrane reactors for efficient degradation of organic pollutants in water. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122515] [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]
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7
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Guastaferro M, Baldino L, Vaiano V, Cardea S, Reverchon E. Supercritical Phase Inversion to Produce Photocatalytic Active PVDF-coHFP_TiO 2 Composites for the Degradation of Sudan Blue II Dye. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8894. [PMID: 36556698 PMCID: PMC9782530 DOI: 10.3390/ma15248894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/08/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
TiO2-loaded poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-coHFP) membranes were produced by supercritical CO2-assisted phase inversion. Three different TiO2 loadings were tested: 10, 20, and 30 wt% with respect to the polymer. Increasing the TiO2 amount from 10 wt% to 20 wt% in the starting solution, the transition from leafy-like to leafy-cellular morphology was observed in the section of the membrane. When 30 wt% TiO2 was used, the entire membrane section showed agglomerates of TiO2 nanoparticles. These polymeric membranes were tested to remove Sudan Blue II (SB) dye from aqueous solutions. The adsorption/photocatalytic processes revealed that membrane morphology and TiO2 cluster size were the parameters that mainly affected the dye removal efficiency. Moreover, after five cycles of exposure of these membranes to UV light, SB removal was higher than 85%.
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Affiliation(s)
- Mariangela Guastaferro
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
| | - Lucia Baldino
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
- C.U.G.RI., InterUniversity Research Center for the Prediction and Prevention of Major Hazards, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
| | - Vincenzo Vaiano
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
| | - Stefano Cardea
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
| | - Ernesto Reverchon
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
- C.U.G.RI., InterUniversity Research Center for the Prediction and Prevention of Major Hazards, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, 84084 Salerno, Italy
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8
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Umberto T, Berto L, Chirumbolo S. WiWell® TiO2-photocatalytic adhesive films to reduce microbial charge in indoor microenvironments of public transportation and ensure biosafety in the COVID-19 time. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2022. [DOI: 10.1016/j.jpap.2022.100143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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9
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Gao M, Zhu Y, Yan J, Wu W, Wang B. Micromechanism Study of Molecular Compatibility of PVDF/PEI Blend Membrane. MEMBRANES 2022; 12:809. [PMID: 36005723 PMCID: PMC9414538 DOI: 10.3390/membranes12080809] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 08/17/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
In this paper, the compatibility of polyetherimide (PEI) with different contents as a high-performance copolymer and polyvinylidene fluoride (PVDF) was studied, and 5%-20% PEI was prepared by the non-solvent-induced phase inversion method. The compatibility of PVDF and PEI was evaluated by analyzing the physical structure and properties of the blend membrane, the microstructure, the glass transition temperature Tg, the enthalpy, and the mechanism of the polymer blend enthalpy change. The results show that the blend membranes have -NH and C=O-N binding energies at X-ray photoelectron spectroscopy (XPS), which preliminarily proves that fluorine-amine bonds are formed between the polymers, and new spectra appeared by Fourier transform infrared (FTIR) and X-ray diffraction (XRD) peaks, which further proves that the two have the formation of fluorine-amine bonds, the Tg and enthalpy of the mixed membrane was increased, and a scanning electron microscope (SEM) observed that the membrane pores changed from finger-like pores to sponge-like macropores. When the content of PEI is 15%, the performance of the blended membrane is the best, the water contact angle increases to 58.5°, the porosity increases to 17.33%, the maximum force increases to 8.04 N, and the elongation at break decreases to 24.26%, the pure water flux is 1870.292 L/m2·h, and the oil rejection is 87%. In addition, the enthalpy change of polymer blending further proves that PEI and PVDF are compatible systems and have a good performance improvement for PVDF.
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Affiliation(s)
- Ming Gao
- College of Naval Architecture and Shipping, Zhejiang Ocean University, Zhoushan 316000, China
| | - Yuanlu Zhu
- College of Naval Architecture and Shipping, Zhejiang Ocean University, Zhoushan 316000, China
| | - Jiangyi Yan
- College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316000, China
| | - Weixing Wu
- College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316000, China
| | - Beifu Wang
- College of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316000, China
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Subramaniam MN, Goh PS, Kanakaraju D, Lim JW, Lau WJ, Ismail AF. Photocatalytic membranes: a new perspective for persistent organic pollutants removal. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:12506-12530. [PMID: 34101123 DOI: 10.1007/s11356-021-14676-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 05/27/2021] [Indexed: 06/12/2023]
Abstract
The presence of conventional and emerging pollutants infiltrating into our water bodies is a course of concern as they have seriously threatened water security. Established techniques such as photocatalysis and membrane technology have proven to be promising in removing various persistent organic pollutants (POP) from wastewaters. The emergence of hybrid photocatalytic membrane which incorporates both photocatalysis and membrane technology has shown greater potential in treating POP laden wastewater based on their synergistic effects. This article provides an in-depth review on the roles of both photocatalysis and membrane technology in hybrid photocatalytic membranes for the treatment of POP containing wastewaters. A concise introduction on POP's in terms of examples, their origins and their effect on a multitude of organisms are critically reviewed. The fundamentals of photocatalytic mechanism, current directions in photocatalyst design and their employment to treat POP's are also discussed. Finally, the challenges and future direction in this field are presented.
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Affiliation(s)
- Mahesan Naidu Subramaniam
- Advanced Membrane Technology Research Center, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Pei Sean Goh
- Advanced Membrane Technology Research Center, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
| | - Devagi Kanakaraju
- Faculty of Resource and Science Technology, Universiti Malaysia Sarawak, 94300, Kota Samarahan, Sarawak, Malaysia
| | - Jun Wei Lim
- Department of Fundamental and Applied Sciences, HICoE-Centre for Biofuel and Biochemical Research, Institute of Self-Sustainable Building, Universiti Teknologi PETRONAS, Seri Iskandar, Darul Ridzuan, 32610, Perak, Malaysia
| | - Woei Jye Lau
- Advanced Membrane Technology Research Center, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Ahmad Fauzi Ismail
- Advanced Membrane Technology Research Center, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
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Teixeira J, Cardoso VF, Botelho G, Morão AM, Nunes-Pereira J, Lanceros-Mendez S. Effect of Polymer Dissolution Temperature and Conditioning Time on the Morphological and Physicochemical Characteristics of Poly(Vinylidene Fluoride) Membranes Prepared by Non-Solvent Induced Phase Separation. Polymers (Basel) 2021; 13:4062. [PMID: 34883566 PMCID: PMC8659276 DOI: 10.3390/polym13234062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/12/2021] [Accepted: 11/19/2021] [Indexed: 11/16/2022] Open
Abstract
This work reports on the production of poly(vinylidene fluoride) (PVDF) membranes by non-solvent induced phase separation (NIPS) using N,N-dimethylformamide (DMF) as solvent and water as non-solvent. The influence of the processing conditions in the morphology, surface characteristics, structure, thermal and mechanical properties were evaluated for polymer dissolution temperatures between 25 and 150 °C and conditioning time between 0 and 10 min. Finger-like pore morphology was obtained for all membranes and increasing the polymer dissolution temperature led to an increase in the average pore size (≈0.9 and 2.1 µm), porosity (≈50 to 90%) and water contact angle (up to 80°), in turn decreasing the β PVDF content (≈67 to 20%) with the degree of crystallinity remaining approximately constant (≈56%). The conditioning time did not significantly affect the polymer properties studied. Thus, the control of NIPS parameters proved to be suitable for tailoring PVDF membrane properties.
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Affiliation(s)
- João Teixeira
- CF-UM-UP, Centre of Physics of Minho and Porto Universities, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal; (J.T.); (V.F.C.)
| | - Vanessa Fernandes Cardoso
- CF-UM-UP, Centre of Physics of Minho and Porto Universities, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal; (J.T.); (V.F.C.)
- CMEMS-UMinho, Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal
| | - Gabriela Botelho
- Department of Chemistry, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal;
| | - António Miguel Morão
- CICS-UBI, The Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal;
| | - João Nunes-Pereira
- CF-UM-UP, Centre of Physics of Minho and Porto Universities, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal; (J.T.); (V.F.C.)
- C-MAST-UBI, Centre for Mechanical and Aerospace Science and Technologies, University of Beira Interior, Rua Marquês d’Ávila e Bolama, 6200-001 Covilhã, Portugal
| | - Senentxu Lanceros-Mendez
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
- IKERBASQUE, Basque Foundation for Science, 48009 Bilbao, Spain
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Russo F, Marino T, Galiano F, Gzara L, Gordano A, Organji H, Figoli A. Tamisolve ® NxG as an Alternative Non-Toxic Solvent for the Preparation of Porous Poly (Vinylidene Fluoride) Membranes. Polymers (Basel) 2021; 13:polym13152579. [PMID: 34372182 PMCID: PMC8347625 DOI: 10.3390/polym13152579] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 07/14/2021] [Accepted: 07/21/2021] [Indexed: 01/17/2023] Open
Abstract
Tamisolve® NxG, a well-known non-toxic solvent, was used for poly(vinylidene fluoride) (PVDF) membranes preparation via a non-solvent-induced phase separation (NIPS) procedure with water as a coagulation bath. Preliminary investigations, related to the study of the physical/chemical properties of the solvent, the solubility parameters, the gel transition temperature and the viscosity of the polymer-solvent system, confirmed the power of the solvent to solubilize PVDF polymer for membranes preparation. The role of polyvinylpyrrolidone (PVP) and/or poly(ethylene glycol) (PEG), as pore former agents in the dope solution, was studied along with different polymer concentrations (10 wt%, 15 wt% and 18 wt%). The produced membranes were then characterized in terms of morphology, thickness, porosity, contact angle, atomic force microscopy (AFM) and infrared spectroscopy (ATR-FTIR). Pore size measurements, pore size distribution and water permeability (PWP) tests placed the developed membranes in the ultrafiltration (UF) and microfiltration (MF) range. Finally, PVDF membrane performances were investigated in terms of rejection (%) and permeability recovery ratio (PRR) using methylene blue (MB) in water solution to assess their potential application in separation and purification processes.
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Affiliation(s)
- Francesca Russo
- Institute on Membrane Technology (ITM-CNR), Via P. Bucci 17c, 87036 Rende, CS, Italy; (F.R.); (F.G.); (A.G.)
| | - Tiziana Marino
- Institute on Membrane Technology (ITM-CNR), Via P. Bucci 17c, 87036 Rende, CS, Italy; (F.R.); (F.G.); (A.G.)
- Correspondence: (T.M.); (A.F.)
| | - Francesco Galiano
- Institute on Membrane Technology (ITM-CNR), Via P. Bucci 17c, 87036 Rende, CS, Italy; (F.R.); (F.G.); (A.G.)
| | - Lassaad Gzara
- Center of Excellence in Desalination Technology, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Saudi Arabia; (L.G.); (H.O.)
| | - Amalia Gordano
- Institute on Membrane Technology (ITM-CNR), Via P. Bucci 17c, 87036 Rende, CS, Italy; (F.R.); (F.G.); (A.G.)
| | - Hussam Organji
- Center of Excellence in Desalination Technology, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Saudi Arabia; (L.G.); (H.O.)
| | - Alberto Figoli
- Institute on Membrane Technology (ITM-CNR), Via P. Bucci 17c, 87036 Rende, CS, Italy; (F.R.); (F.G.); (A.G.)
- Correspondence: (T.M.); (A.F.)
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13
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Yap JX, Leo CP, Mohd Yasin NH, Derek CJC. Sustainable cultivation of Navicula incerta using cellulose-based scaffold incorporated with nanoparticles in air-liquid interface cultivation system. CHEMOSPHERE 2021; 273:129657. [PMID: 33524750 DOI: 10.1016/j.chemosphere.2021.129657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/06/2021] [Accepted: 01/12/2021] [Indexed: 06/12/2023]
Abstract
Microalgae cultivation using open cultivation systems requires large area and it is susceptible to contamination as well as weather changes. Meanwhile, the closed systems require large capital investment, and they are susceptible to the build-up of dissolved oxygen. Air-liquid interface culture systems with low water-footprint, but high packing density can be used for microalgae cultivation if low-cost culture scaffolds are available. In this study, cellulose-based scaffolds were synthesized using NaOH/urea aqueous solution as the solvent. Titanium dioxide (TiO2), silica gel and polyethylene glycol 1000 (PEG 1000) nanoparticles were added into the membrane scaffolds to increase the hydrophilicity of nutrient absorbing to support the growth of microalgae. The membrane scaffolds were characterized by FTIR, SEM, contact angle, porosity and porometry. All three nanoparticles additives showed their ability in reducing the contact angle of membrane scaffolds from 63.4 ± 2.3° to a range of 52.6 ± 1.2° to 38.8 ± 1.5° due to the hydrophilic properties of the nanoparticles. The decreasing in pore size when nanoparticles were added did not affect the porosity of membrane scaffolds. Cellulose membrane scaffold with TiO2 showed the highest percentage of microalgae Navicula incerta growth rate of 22.1% because of the antibacterial properties of TiO2 in lowering the risk of cell contamination and enhancing the growth of N. incerta. The results exhibited that cellulose-based scaffold with TiO2 added could be an effective support in plant cell culture field.
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Affiliation(s)
- Jia Xin Yap
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Pulau Pinang, 14300, Malaysia
| | - C P Leo
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Pulau Pinang, 14300, Malaysia
| | - Nazlina Haiza Mohd Yasin
- Department of Biological Sciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM, Bangi, Selangor, 43600, Malaysia
| | - C J C Derek
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Pulau Pinang, 14300, Malaysia.
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14
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In situ generation of nano TiO2 on activated carbon fiber with enhanced photocatalytic degradation performance. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-021-04490-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Zakria HS, Othman MHD, Kamaludin R, Sheikh Abdul Kadir SH, Kurniawan TA, Jilani A. Immobilization techniques of a photocatalyst into and onto a polymer membrane for photocatalytic activity. RSC Adv 2021; 11:6985-7014. [PMID: 35685270 PMCID: PMC9131363 DOI: 10.1039/d0ra10964a] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 01/26/2021] [Indexed: 12/14/2022] Open
Abstract
This article reviews the various techniques of immobilizing a photocatalyst into and onto the polymer membrane for pollutant removal and as a problem solver in handling suspended photocatalyst issues from the previous literature. A particular focus is given to the preparation of mixed matrix membranes and deposition techniques for photocatalytic degradation in applications for wastewater treatment. Advantages and disadvantages in this application are evaluated. Various operating conditions during the process are presented. About 90 recently published studies (2008–2020) are reviewed. From the literature, it was found that TiO2 is the most favoured photocatalyst that is frequently used in photocatalytic water treatment. Dry–wet co-spinning and sputtering techniques emerged as the promising technique for immobilizing a uniformly distributed photocatalyst within the polymeric membrane, and exhibited excellence pollutant removal. In general, the technical applicability is the key factor in selecting the best photocatalyst immobilizing technique for water treatment. Finally, the scope of various techniques that have been reviewed may provide potential for future photocatalytic study. This article reviews the various techniques of immobilizing a photocatalyst into and onto the polymer membrane for pollutant removal and as a problem solver in handling suspended photocatalyst issues from the previous literature.![]()
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Affiliation(s)
- Hazirah Syahirah Zakria
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), 81310 Skudai, Johor, Malaysia
| | - Mohd Hafiz Dzarfan Othman
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), 81310 Skudai, Johor, Malaysia
| | - Roziana Kamaludin
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), 81310 Skudai, Johor, Malaysia
| | - Siti Hamimah Sheikh Abdul Kadir
- Institute of Pathology, Laboratory and Forensics (I-PPerForM), Faculty of Medicine, Universiti Teknologi MARA (UiTM), Cawangan Selangor, 47000 Sungai Buloh, Selangor, Malaysia
| | - Tonni Agustiono Kurniawan
- Key Laboratory of the Coastal and Wetland Ecosystems, Ministry of Education, College of Environment and Ecology, Xiamen University, Xiamen 361102, P. R. China
| | - Asim Jilani
- Center of Nanotechnology, King Abdul-Aziz University, 21589 Jeddah, Saudi Arabia
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16
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Zeitoun Z, El-Shazly AH, Nosier S, Elmarghany MR, Salem MS, Taha MM. Performance Evaluation and Kinetic Analysis of Photocatalytic Membrane Reactor in Wastewater Treatment. MEMBRANES 2020; 10:membranes10100276. [PMID: 33049928 PMCID: PMC7601555 DOI: 10.3390/membranes10100276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 10/04/2020] [Accepted: 10/06/2020] [Indexed: 11/30/2022]
Abstract
The objectives of the current study are to assess and compare the performance of a developed photocatalytic membrane reactor (PMR) in treating industrial waste (e.g., organic dye waste) against membrane distillation. The current PMR is composed of a feed tank, which is a continuous stirred photocatalytic reactor containing slurry Titanium dioxide (TiO2) particles that are activated by using ultraviolet lamp irradiation at a wavelength of 365 nm, and a poly-vinylidene flouride (PVDF) membrane cell. The experimental setup was designed in a flexible way to enable both separate and integrated investigations of the photocatalytic reactor and the membrane, separately and simultaneously. The experimental work was divided into two phases. Firstly, the PVDF membrane was fabricated and characterized to examine its morphology, surface charge, and hydrophobicity by using a scanning electron microscope, surface zeta potential, and contact angle tests, respectively. Secondly, the effects of using different concentrations of the TiO2 photocatalyst and feed (e.g., dye concentration) were examined. It is found that the PMR can achieve almost 100% dye removal and pure permeate is obtained at certain conditions. Additionally, a kinetic analysis was performed and revealed that the photocatalytic degradation of dye follows a pseudo-first-order reaction.
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Affiliation(s)
- Zeyad Zeitoun
- Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 11432, Egypt; (Z.Z.); (A.H.E.-S.); (S.N.)
| | - Ahmed H. El-Shazly
- Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 11432, Egypt; (Z.Z.); (A.H.E.-S.); (S.N.)
- Chemical and Petrochemical Engineering Department, Egypt-Japan University of Science and Technology (E-Just), New Borg El-Arab City, Alexandria 21934, Egypt
| | - Shaaban Nosier
- Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 11432, Egypt; (Z.Z.); (A.H.E.-S.); (S.N.)
| | - Mohamed R. Elmarghany
- Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt;
- Mansoura University Nanotechnology Center, Mansoura University, Mansoura 35516, Egypt
- Correspondence: (M.R.E.); (M.M.T.)
| | - Mohamed S. Salem
- Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt;
- Mansoura University Nanotechnology Center, Mansoura University, Mansoura 35516, Egypt
| | - Mahmoud M. Taha
- Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 11432, Egypt; (Z.Z.); (A.H.E.-S.); (S.N.)
- Environmental Engineering Department, University of Science and Technology, Zewail City of Science and Technology, October Gardens, Giza 12578, Egypt
- Correspondence: (M.R.E.); (M.M.T.)
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17
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Al Rai A, Stojanovska E, Akgul Y, Khan MM, Kilic A, Yilmaz S. Fabrication of
co‐PVDF
/modacrylic/
SiO
2
nanofibrous membrane: Composite separator for safe and high performance lithium‐ion batteries. J Appl Polym Sci 2020. [DOI: 10.1002/app.49835] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Adel Al Rai
- TEMAG Labs Istanbul Technical University Istanbul Turkey
- Department of Mechanical Engineering Istanbul Technical University Istanbul Turkey
| | | | - Yasin Akgul
- Department of Engineering Karabuk University Karabuk Turkey
| | - Mohammad Mansoob Khan
- Chemical Sciences Universiti Brunei Darussalam Bandar Seri Begawan Brunei Darussalam
| | - Ali Kilic
- TEMAG Labs Istanbul Technical University Istanbul Turkey
- R&D Department Areka LLC Istanbul Turkey
| | - Safak Yilmaz
- Department of Mechanical Engineering Istanbul Technical University Istanbul Turkey
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18
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Polyvinylidene Fluoride-Graphene Oxide Membranes for Dye Removal under Visible Light Irradiation. Polymers (Basel) 2020; 12:polym12071509. [PMID: 32645993 PMCID: PMC7407290 DOI: 10.3390/polym12071509] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 07/04/2020] [Accepted: 07/06/2020] [Indexed: 11/16/2022] Open
Abstract
In this study, polyvinylidene fluoride (PVDF)-graphene oxide (GO) membranes were obtained by employing triethyl phosphate (TEP) as a solvent. GO nanosheets were prepared and characterized in terms of scanning and transmission electron microscopy (SEM and TEM, respectively), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), chemical analysis and inductively coupled plasma mass spectroscopy (ICP). Two different phase inversion techniques, Non-Solvent Induced Phase Separation (NIPS) and Vapour-Induced Phase Separation (VIPS)/NIPS, were applied to study the effect of fabrication procedure on the membrane structure and properties. Membranes were characterized by SEM, AFM, pore size, porosity, contact angle and mechanical tests, and finally tested for photocatalytic methylene blue (MB+) degradation under visible light irradiation. The effect of different pH values of dye aqueous solutions on the photocatalytic efficiency was investigated. Finally, the influence of NaCl salt on the MB+ photodegradation process was also evaluated.
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19
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Yaacob N, Goh PS, Ismail AF, Mohd Nazri NA, Ng BC, Zainal Abidin MN, Yogarathinam LT. ZrO 2-TiO 2 Incorporated PVDF Dual-Layer Hollow Fiber Membrane for Oily Wastewater Treatment: Effect of Air Gap. MEMBRANES 2020; 10:E124. [PMID: 32560267 PMCID: PMC7345686 DOI: 10.3390/membranes10060124] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/08/2020] [Accepted: 06/12/2020] [Indexed: 12/30/2022]
Abstract
Dual-layer hollow fiber (DLHF) nanocomposite membrane prepared by co-extrusion technique allows a uniform distribution of nanoparticles within the membrane outer layer to enhance the membrane performance. The effects of spinning parameters especially the air gap on the physico-chemical properties of ZrO2-TiO2 nanoparticles incorporated PVDF DLHF membranes for oily wastewater treatment have been investigated in this study. The zeta potential of the nanoparticles was measured to be around -16.5 mV. FESEM-EDX verified the uniform distribution of Ti, Zr, and O elements throughout the nanoparticle sample and the TEM images showed an average nanoparticles grain size of ~12 nm. Meanwhile, the size distribution intensity was around 716 nm. A lower air gap was found to suppress the macrovoid growth which resulted in the formation of thin outer layer incorporated with nanoparticles. The improvement in the separation performance of PVDF DLHF membranes embedded with ZrO2-TiO2 nanoparticles by about 5.7% in comparison to the neat membrane disclosed that the incorporation of ZrO2-TiO2 nanoparticles make them potentially useful for oily wastewater treatment.
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Affiliation(s)
- Nurshahnawal Yaacob
- Advanced Membrane Technology Research Centre (AMTEC), School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81300 Skudai, Johor, Malaysia; (N.Y.); (P.S.G.); (B.C.N.); (M.N.Z.A.); (L.T.Y.)
- Malaysian Institute of Marine Engineering Technology (MIMET), Universiti Kuala Lumpur, 32200 Lumut, Perak, Malaysia
| | - Pei Sean Goh
- Advanced Membrane Technology Research Centre (AMTEC), School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81300 Skudai, Johor, Malaysia; (N.Y.); (P.S.G.); (B.C.N.); (M.N.Z.A.); (L.T.Y.)
| | - Ahmad Fauzi Ismail
- Advanced Membrane Technology Research Centre (AMTEC), School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81300 Skudai, Johor, Malaysia; (N.Y.); (P.S.G.); (B.C.N.); (M.N.Z.A.); (L.T.Y.)
| | - Noor Aina Mohd Nazri
- Malaysian Institute of Chemical and Bio–Engineering Technology (MICET), Universiti Kuala Lumpur, 78000 Alor Gajah, Melaka, Malaysia;
| | - Be Cheer Ng
- Advanced Membrane Technology Research Centre (AMTEC), School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81300 Skudai, Johor, Malaysia; (N.Y.); (P.S.G.); (B.C.N.); (M.N.Z.A.); (L.T.Y.)
| | - Muhammad Nizam Zainal Abidin
- Advanced Membrane Technology Research Centre (AMTEC), School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81300 Skudai, Johor, Malaysia; (N.Y.); (P.S.G.); (B.C.N.); (M.N.Z.A.); (L.T.Y.)
| | - Lukka Thuyavan Yogarathinam
- Advanced Membrane Technology Research Centre (AMTEC), School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81300 Skudai, Johor, Malaysia; (N.Y.); (P.S.G.); (B.C.N.); (M.N.Z.A.); (L.T.Y.)
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20
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Critical Issues and Guidelines to Improve the Performance of Photocatalytic Polymeric Membranes. Catalysts 2020. [DOI: 10.3390/catal10050570] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Photocatalytic membrane reactors (PMR), with immobilized photocatalysts, play an important role in process intensification strategies; this approach offers a simple solution to the typical catalyst recovery problem of photocatalytic processes and, by simultaneous filtration and photocatalysis of the aqueous streams, facilitates clean water production in a single unit. The synthesis of polymer photocatalytic membranes has been widely explored, while studies focused on ceramic photocatalytic membranes represent a minority. However, previous reports have identified that the successful synthesis of polymeric photocatalytic membranes still faces certain challenges that demand further research, e.g., (i) reduced photocatalytic activity, (ii) photocatalyst stability, and (iii) membrane aging, to achieve technological competitiveness with respect to suspended photocatalytic systems. The novelty of this review is to go a step further to preceding literature by first, critically analyzing the factors behind these major limitations and second, establishing useful guidelines. This information will help researchers in the field in the selection of the membrane materials and synthesis methodology for a better performance of polymeric photocatalytic membranes with targeted functionality; special attention is focused on factors affecting membrane aging and photocatalyst stability.
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21
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Mansingh S, Kandi D, Das KK, Parida K. A Mechanistic Approach on Oxygen Vacancy-Engineered CeO 2 Nanosheets Concocts over an Oyster Shell Manifesting Robust Photocatalytic Activity toward Water Oxidation. ACS OMEGA 2020; 5:9789-9805. [PMID: 32391466 PMCID: PMC7203704 DOI: 10.1021/acsomega.9b04420] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 02/25/2020] [Indexed: 05/04/2023]
Abstract
Lethargic kinetics is the foremost bottleneck of the photocatalytic water oxidation reaction. Hence, in this respect, the CeO2 coral reef made up of nanosheets is studied focusing on the oxygen vacancy that affects the water oxidation reaction. First, CeO2 was prepared in an oyster shell/crucible with the presence/absence of urea by a simple calcination technique to tune the oxygen vacancy. More oxygen vacancy was detected in CeO2 prepared from urea and oyster shell, which is evidenced from Raman and PL analyses. Further, the oyster shell-treated sample was found to be of nanosheet type with numerous pores as observed via TEM analysis. The theoretical approach was adopted to expose the role of oxygen vacancies and the fate of scavenging agents in the water oxidation mechanism. It was observed that an oxygen vacancy plays a vital role in minimizing the activation energy hump and opposes the reverse reaction. The apparent conversion efficiency of 7.1% is calculated for the oxygen evolution reaction. Oxygen vacancy, quantum confinement effect, and charge separation efficiency are mainly responsible for the better photocatalyzed water oxidation reaction and hydroxyl radical production. This investigation will help in providing valuable information toward designing cost-effective oxygen vacancy-oriented nanosheet systems and the importance of vacancy in the water-splitting reaction.
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22
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Svoboda L, Licciardello N, Dvorský R, Bednář J, Henych J, Cuniberti G. Design and Performance of Novel Self-Cleaning g-C 3N 4/PMMA/PUR Membranes. Polymers (Basel) 2020; 12:E850. [PMID: 32272693 PMCID: PMC7240415 DOI: 10.3390/polym12040850] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 03/27/2020] [Accepted: 04/03/2020] [Indexed: 11/17/2022] Open
Abstract
In the majority of photocatalytic applications, the photocatalyst is dispersed as a suspension of nanoparticles. The suspension provides a higher surface for the photocatalytic reaction in respect to immobilized photocatalysts. However, this implies that recovery of the particles by filtration or centrifugation is needed to collect and regenerate the photocatalyst. This complicates the regeneration process and, at the same time, leads to material loss and potential toxicity. In this work, a new nanofibrous membrane, g-C3N4/PMMA/PUR, was prepared by the fixation of exfoliated g-C3N4 to polyurethane nanofibers using thin layers of poly(methyl methacrylate) (PMMA). The optimal amount of PMMA was determined by measuring the adsorption and photocatalytic properties of g-C3N4/PMMA/PUR membranes (with a different PMMA content) in an aqueous solution of methylene blue. It was found that the prepared membranes were able to effectively adsorb and decompose methylene blue. On top of that, the membranes evinced a self-cleaning behavior, showing no coloration on their surfaces after contact with methylene blue, unlike in the case of unmodified fabric. After further treatment with H2O2, no decrease in photocatalytic activity was observed, indicating that the prepared membrane can also be easily regenerated. This study promises possibilities for the production of photocatalytic membranes and fabrics for both chemical and biological contaminant control.
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Affiliation(s)
- Ladislav Svoboda
- IT4Innovations, VŠB—Technical University of Ostrava, Ostrava, 17. listopadu 15/2172, 708 33 Ostrava, Czech Republic; (R.D.); (J.B.)
- Nanotechnology Centre, VŠB-Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava, Czech Republic
| | - Nadia Licciardello
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany; (N.L.); (G.C.)
| | - Richard Dvorský
- IT4Innovations, VŠB—Technical University of Ostrava, Ostrava, 17. listopadu 15/2172, 708 33 Ostrava, Czech Republic; (R.D.); (J.B.)
- Nanotechnology Centre, VŠB-Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava, Czech Republic
| | - Jiří Bednář
- IT4Innovations, VŠB—Technical University of Ostrava, Ostrava, 17. listopadu 15/2172, 708 33 Ostrava, Czech Republic; (R.D.); (J.B.)
- Nanotechnology Centre, VŠB-Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava, Czech Republic
| | - Jiří Henych
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Husinec-Řež 1001, 250 68 Řež, Czech Republic;
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany; (N.L.); (G.C.)
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23
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Effects of Mixtures of Engineered Nanoparticles and Metallic Pollutants on Aquatic Organisms. ENVIRONMENTS 2020. [DOI: 10.3390/environments7040027] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In aquatic environment, engineered nanoparticles (ENPs) are present as complex mixtures with other pollutants, such as trace metals, which could result in synergism, additivity or antagonism of their combined effects. Despite the fact that the toxicity and environmental risk of the ENPs have received extensive attention in the recent years, the interactions of ENPs with other pollutants and the consequent effects on aquatic organisms represent an important challenge in (nano)ecotoxicology. The present review provides an overview of the state-of-the-art and critically discusses the existing knowledge on combined effects of mixtures of ENPs and metallic pollutants on aquatic organisms. The specific emphasis is on the adsorption of metallic pollutants on metal-containing ENPs, transformation and bioavailability of ENPs and metallic pollutants in mixtures. Antagonistic, additive and synergistic effects observed in aquatic organisms co-exposed to ENPs and metallic pollutants are discussed in the case of “particle-proof” and “particle-ingestive” organisms. This knowledge is important in developing efficient strategies for sound environmental impact assessment of mixture exposure in complex environments.
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24
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Jusoh N, Yeong YF, Lock SSM, Yub Harun N, Mohd Yusoff MH. Effect of a Different Number of Amine-Functional Groups on the Gas Sorption and Permeation Behavior of a Hybrid Membrane Comprising of Impregnated Linde T and 4,4'- (Hexafluoroisopropylidene) Diphthalic Anhydride-Derived Polyimide. Polymers (Basel) 2019; 11:polym11111807. [PMID: 31689895 PMCID: PMC6918446 DOI: 10.3390/polym11111807] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/26/2019] [Accepted: 09/26/2019] [Indexed: 11/29/2022] Open
Abstract
The bottleneck of conventional polymeric membranes applied in industry has a tradeoff between permeability and selectivity that deters its widespread expansion. This can be circumvented through a hybrid membrane that utilizes the advantages of inorganic and polymer materials to improve the gas separation performance. The approach can be further enhanced through the incorporation of amine-impregnated fillers that has the potential to minimize defects while simultaneously enhancing gas affinity. An innovative combination between impregnated Linde T with different numbers of amine-functional groups (i.e., monoamine, diamine, and triamine) and 4,4′-(hexafluoroisopropylidene) diphthalic anhydride (6FDA)-derived polyimide has been elucidated to explore its potential in CO2/CH4 separation. Detailed physical properties (i.e., free volume and glass transition temperature) and gas transport behavior (i.e., solubility, permeability, and diffusivity) of the fabricated membranes have been examined to unveil the effect of different numbers of amine-functional groups in Linde T fillers. It was found that a hybrid membrane impregnated with Linde T using a diamine functional group demonstrated the highest improvement compared to a pristine polyimide with 3.75- and 1.75-fold enhancements in CO2/CH4 selectivities and CO2 permeability, respectively, which successfully lies on the 2008 Robeson’s upper bound. The novel coupling of diamine-impregnated Linde T and 6FDA-derived polyimide is a promising candidate for application in large-scale CO2 removal processes.
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Affiliation(s)
- Norwahyu Jusoh
- Centre for Contaminant Control & Utilization (CenCoU), Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610 Bandar Seri Iskandar, Malaysia.
| | - Yin Fong Yeong
- CO2 Research Centre (CO2RES), Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610 Bandar Seri Iskandar, Malaysia.
| | - Serene Sow Mun Lock
- CO2 Research Centre (CO2RES), Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610 Bandar Seri Iskandar, Malaysia.
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Malaysia.
| | - Noorfidza Yub Harun
- Centre of Urbanization and Resources Sustainability (CUReS), Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610 Bandar Seri Iskandar, Malaysia.
| | - Mohd Hizami Mohd Yusoff
- Centre for Biofuel and Biochemical Research (CBBR), Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610 Bandar Seri Iskandar, Malaysia.
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25
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Abstract
In this study, pH sensors were successfully fabricated on a fluorine-doped tin oxide substrate and grown via hydrothermal methods for 8 h for pH sensing characteristics. The morphology was obtained by high-resolution scanning electron microscopy and showed randomly oriented flower-like nanostructures. The TiO2 nanoflower pH sensors were measured over a pH range of 2–12. Results showed a high sensitivity of the TiO2 nano-flowers pH sensor, 2.7 (μA)1/2/pH, and a linear relationship between IDS and pH (regression of 0.9991). The relationship between voltage reference and pH displayed a sensitivity of a 46 mV/pH and a linear regression of 0.9989. The experimental result indicated that a flower-like TiO2 nanostructure extended gate field effect transistor (EGFET) pH sensor effectively detected the pH value.
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26
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Benhabiles O, Galiano F, Marino T, Mahmoudi H, Lounici H, Figoli A. Preparation and Characterization of TiO₂-PVDF/PMMA Blend Membranes Using an Alternative Non-Toxic Solvent for UF/MF and Photocatalytic Application. Molecules 2019; 24:E724. [PMID: 30781579 PMCID: PMC6412202 DOI: 10.3390/molecules24040724] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/14/2019] [Accepted: 02/16/2019] [Indexed: 11/26/2022] Open
Abstract
The approach of the present work is based on the use of poly (methylmethacrylate) (PMMA) polymer, which is compatible with PVDF and TiO₂ nanoparticles in casting solutions, for the preparation of nano-composites membranes using a safer and more compatible solvent. TiO₂ embedded poly (vinylidene fluoride) (PVDF)/PMMA photocatalytic membranes were prepared by phase inversion method. A non-solvent induced phase separation (NIPS) coupled with vapor induced phase separation (VIPS) was used to fabricate flat-sheet membranes using a dope solution consisting of PMMA, PVDF, TiO₂, and triethyl phosphate (TEP) as an alternative non-toxic solvent. Membrane morphology was examined by scanning electron microscopy (SEM). Backscatter electron detector (BSD) mapping was used to monitor the inter-dispersion of TiO₂ in the membrane surface and matrix. The effects of polymer concentration, evaporation time, additives and catalyst amount on the membrane morphology and properties were investigated. Tests on photocatalytic degradation of methylene blue (MB) were also carried out using the membranes entrapped with different concentrations of TiO₂. The results of this study showed that nearly 99% MB removal can be easily achieved by photocatalysis using TiO₂ immobilized on the membrane matrix. Moreover, it was observed that the quantity of TiO₂ plays a significant role in the dye removal.
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Affiliation(s)
- Ouassila Benhabiles
- Department, Unité de Développement des Equipements Solaires, UDES /Centre de Développement des Energies Renouvelables, CDER, Tipaza 42004, Algeria.
- Département génie de l'Environnement, Ecole Nationale Polytechnique, Alger 16200, Algérie.
| | - Francesco Galiano
- Institute on Membrane Technology (ITM-CNR), Via P. Bucci 17c, 87036 Rende (CS), Italy.
| | - Tiziana Marino
- Institute on Membrane Technology (ITM-CNR), Via P. Bucci 17c, 87036 Rende (CS), Italy.
| | - Hacene Mahmoudi
- Faculty of Technology, University Hassiba Benbouali of Chlef, Chlef 02000, Algeria.
| | - Hakim Lounici
- Département génie de l'Environnement, Ecole Nationale Polytechnique, Alger 16200, Algérie.
- Faculty of Science, University of Bouira, Bouira 02180, Algeria.
| | - Alberto Figoli
- Institute on Membrane Technology (ITM-CNR), Via P. Bucci 17c, 87036 Rende (CS), Italy.
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27
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Hydrogen and Oxygen Evolution in a Membrane Photoreactor Using Suspended Nanosized Au/TiO2 and Au/CeO2. CHEMENGINEERING 2019. [DOI: 10.3390/chemengineering3010005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Photocatalysis combined with membrane technology could offer an enormous potential for power generation in a renewable and sustainable way. Herein, we describe the one-step hydrogen and oxygen evolution through a photocatalytic membrane reactor. Experimental tests were carried out by means of a two-compartment cell in which a modified Nafion membrane separated the oxygen and hydrogen evolution semi-cells, while iron ions permeating through the membrane acted as a redox mediator. Nanosized Au/TiO2 and Au/CeO2 were employed as suspended photocatalysts for hydrogen and oxygen generation, respectively. The influence of initial Fe3+ ion concentration, ranging from 5 to 20 mM, was investigated, and the best results in terms of hydrogen and oxygen evolution were registered by working with 5 mM Fe3+. The positive effect of gold on the overall water splitting was confirmed by comparing the photocatalytic results obtained with the modified/unmodified titania and ceria. Au-loading played a key role for controlling the photocatalytic activity, and the optimal percentage for hydrogen and oxygen generation was 0.25 wt%. Under irradiation with visible light, hydrogen and oxygen were produced in stoichiometric amounts. The crucial role of the couple Fe3+/Fe2+ and of the membrane on the performance of the overall photocatalytic system was found.
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