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Kuspanov Z, Baglan B, Baimenov A, Issadykov A, Yeleuov M, Daulbayev C. Photocatalysts for a sustainable future: Innovations in large-scale environmental and energy applications. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 885:163914. [PMID: 37149164 DOI: 10.1016/j.scitotenv.2023.163914] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/12/2023] [Accepted: 04/29/2023] [Indexed: 05/08/2023]
Abstract
The growing environmental and energy crises have prompted researchers to seek new solutions, including large-scale photocatalytic environmental remediation and the production of solar hydrogen using photocatalytic materials. To achieve this goal, scientists have developed numerous photocatalysts with high efficiency and stability. However, the large-scale application of photocatalytic systems under real-world conditions is still limited. These limitations arise at every step, including the large-scale synthesis and deposition of photocatalyst particles on a solid support, and the development of an optimal design with high mass transfer and efficient photon absorption. The purpose of this article is to provide a detailed description of the primary challenges and potential solutions encountered in scaling up photocatalytic systems for use in large-scale water and air purification and solar hydrogen production. Additionally, based on a review of current pilot developments, we draw conclusions and make comparisons regarding the main operating parameters that affect performance, as well as propose strategies for future research.
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Affiliation(s)
- Zhengisbek Kuspanov
- Satbayev University, 050013 Almaty, Kazakhstan; Institute of Nuclear Physics, 050032 Almaty, Kazakhstan; Joint Institute for Nuclear Research, 141980 Dubna, Russian Federation
| | - Bakbolat Baglan
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan; Al Farabi Kazakh National University, 050040 Almaty, Kazakhstan
| | - Alzhan Baimenov
- Al Farabi Kazakh National University, 050040 Almaty, Kazakhstan; National Laboratory Astana, Nazarbayev University, 010000 Astana, Kazakhstan
| | - Aidos Issadykov
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan; National Laboratory Astana, Nazarbayev University, 010000 Astana, Kazakhstan
| | - Mukhtar Yeleuov
- Satbayev University, 050013 Almaty, Kazakhstan; Institute of Nuclear Physics, 050032 Almaty, Kazakhstan
| | - Chingis Daulbayev
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan; National Laboratory Astana, Nazarbayev University, 010000 Astana, Kazakhstan.
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2
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Evaluating the response of nitrogen implantation in ZnO ALD thin films and their photocatalytic assessment. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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3
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Aguilar S, Ramos D, Santaballa J, Canle M. Preparation, characterization and testing of a bulky non-supported photocatalyst for water pollution abatement. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.12.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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4
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Review on Support Materials Used for Immobilization of Nano-Photocatalysts for Water Treatment Applications. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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5
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Benz D, Van Bui H, Hintzen HT, Kreutzer MT, van Ommen JR. Mechanistic insight into the improved photocatalytic degradation of dyes for an ultrathin coating of SiO2 on TiO2 (P25) nanoparticles. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100288] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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6
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Sayegh S, Tanos F, Nada A, Lesage G, Zaviska F, Petit E, Rouessac V, Iatsunskyi I, Coy E, Viter R, Damberga D, Weber M, Razzouk A, Stephan J, Bechelany M. Tunable TiO 2-BN-Pd nanofibers by combining electrospinning and atomic layer deposition to enhance photodegradation of acetaminophen. Dalton Trans 2022; 51:2674-2695. [PMID: 35088785 DOI: 10.1039/d1dt03715c] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The demand for fresh and clean water sources is increasing globally, and there is a need to develop novel routes to eliminate micropollutants and other harmful species from water. Photocatalysis is a promising alternative green technology that has shown great performance in the degradation of persistent pollutants. Titanium dioxide is the most used catalyst owing to its attractive physico-chemical properties, but this semiconductor presents limitations in the photocatalysis process due to the high band gap and the fast recombination of the photogenerated carriers. Herein, a novel photocatalyst has been developed, based on titanium dioxide nanofibers (TiO2 NFs) synthesized by electrospinning. The TiO2 NFs were coated by atomic layer deposition (ALD) to grow boron nitride (BN) and palladium (Pd) on their surface. The UV-Vis spectroscopy measurements confirmed the increase of the band gap and the extension of the spectral response to the visible range. The obtained TiO2/BN/Pd nanofibers were then tested for photocatalysis, and showed a drastic increase of acetaminophen (ACT) degradation (>90%), compared to only 20% degradation obtained with pure TiO2 after 4 h of visible light irradiation. The high photocatalytic activity was attributed to the good dispersion of Pd NPs on TiO2-BN nanofibers, leading to a higher transfer of photoexcited hole carriers and a decrease of photogenerated electron-charge recombination. To confirm its reusability, recycling tests on the hybrid photocatalyst TiO2/BN/Pd have been performed, showing a good stability over 5 cycles under UV and visible light. In addition, toxicity tests as well as quenching tests were carried out to check the toxicity of the byproducts formed and to determine active species responsible for the degradation. The results presented in this work demonstrate the potential of TiO2/BN/Pd nanomaterials, and open new prospects for the preparation of tunable photocatalysts.
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Affiliation(s)
- Syreina Sayegh
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier cedex 5, France.
- Laboratoire d'Analyses Chimiques, LAC - Lebanese University, Faculty of Sciences, Jdeidet 90656, Lebanon
| | - Fida Tanos
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier cedex 5, France.
- Laboratoire d'Analyses Chimiques, LAC - Lebanese University, Faculty of Sciences, Jdeidet 90656, Lebanon
| | - Amr Nada
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier cedex 5, France.
- Department of Analysis and Evaluation, Egyptian Petroleum Research Institute, Cairo, 11727, Egypt
| | - Geoffroy Lesage
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier cedex 5, France.
| | - François Zaviska
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier cedex 5, France.
| | - Eddy Petit
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier cedex 5, France.
| | - Vincent Rouessac
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier cedex 5, France.
| | - Igor Iatsunskyi
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland
| | - Emerson Coy
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland
| | - Roman Viter
- Institut of Atomic Physics and Spectroscopy, University of Latvia, Rainis Blvd., LV-1586, Riga, Latvia
- Center for Collective Use of Scientific Equipment, Sumy State University, 31, Sanatornaya st, 40018 Sumy, Ukraine
| | - Daina Damberga
- Institut of Atomic Physics and Spectroscopy, University of Latvia, Rainis Blvd., LV-1586, Riga, Latvia
| | - Matthieu Weber
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France
| | - Antonio Razzouk
- Laboratoire d'Analyses Chimiques, LAC - Lebanese University, Faculty of Sciences, Jdeidet 90656, Lebanon
| | - Juliette Stephan
- Laboratoire d'Analyses Chimiques, LAC - Lebanese University, Faculty of Sciences, Jdeidet 90656, Lebanon
| | - Mikhael Bechelany
- Institut Européen des Membranes, IEM UMR 5635, Univ Montpellier, CNRS, ENSCM Place Eugène Bataillon, 34095 Montpellier cedex 5, France.
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Karavasilis MV, Theodoropoulou MA, Tsakiroglou CD. Photocatalytic Degradation of Dissolved Phenol by Immobilized Zinc Oxide Nanoparticles: Batch Studies, Continuous Flow Experiments, and Numerical Modeling. NANOMATERIALS 2021; 12:nano12010069. [PMID: 35010019 PMCID: PMC8746677 DOI: 10.3390/nano12010069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/19/2021] [Accepted: 12/24/2021] [Indexed: 11/17/2022]
Abstract
In spite of the progress achieved on the photo-catalytic treatment of water streams, there is still a gap of knowledge on the optimization of the performance of continuous-flow photo-reactors. Zinc-oxide (ZnO) nanoparticles were immobilized on Duranit (80% silica + 20% alumina) inert balls with dip-coating and thermal annealing. The immobilized ZnO nanoparticles were characterized by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectroscopy, and Raman spectroscopy. To assess the stability and photocatalytic capacity of immobilized ZnO, degradation tests of phenol were performed in batch mode in a 22 W UV-oven with an emission peak at 375 nm by varying the temperature, the initial phenol concentration, and the ratio of photocatalyst mass to initial phenol mass. Continuous flow tests were conducted on two types of annular photo-reactors, made of poly(methyl)methacrylate (PMMA) and stainless steel (STST), equipped with a 6 W UV-lamp with emission at 375 nm, packed with ZnO-coated Duranit beads. Experiments were conducted by recirculating the phenol solution between the annular space of reactor and an external tank and varying the flow rate and the liquid volume in the tank. A one-dimensional dynamic mathematical model was developed by combining reactive with mass-transfer processes and used to estimate the overall reaction kinetic constant with inverse modeling. The results revealed that the ZnO losses might be discernible in batch mode due to the intense stirring caused by the bubbles of injected air, while an insignificant loss of ZnO mass occurs under continuous flow conditions, even after several cycles of reuse; the order of the overall phenol photodegradation reaction is lower than unity; the pseudo-1st order kinetic constant scales positively with the ratio of photocatalyst mass to the initial phenol mass and Peclet number.
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Affiliation(s)
- Michalis V. Karavasilis
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas, Stadiou Street Platani, 26504 Patras, Greece; (M.V.K.); (M.A.T.)
- Department of Chemistry, University of Patras, 26504 Patras, Greece
| | - Maria A. Theodoropoulou
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas, Stadiou Street Platani, 26504 Patras, Greece; (M.V.K.); (M.A.T.)
| | - Christos D. Tsakiroglou
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas, Stadiou Street Platani, 26504 Patras, Greece; (M.V.K.); (M.A.T.)
- Correspondence: ; Tel.: +30-2610-965212
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8
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Cionti C, Cosaert E, Deshayes G, Falletta E, Meroni D, Bianchi CL, Poelman D. Self-cleaning, photocatalytic films on aluminum plates for multi-pollutant air remediation: promoting adhesion and activity by SiO 2interlayers. NANOTECHNOLOGY 2021; 32:475710. [PMID: 34388747 DOI: 10.1088/1361-6528/ac1d76] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 08/13/2021] [Indexed: 06/13/2023]
Abstract
In recent years, nanoparticles have come under close scrutiny for their possible health and environmental issues, making them less attractive for photocatalytic applications in air or water purification. Replacing free nano-powders with active and stable films is thus a fundamental step towards developing effective photocatalytic devices. Aluminum represents a cheap and technologically-relevant substrate, but its photocatalytic applications have been hampered by adhesion issues and metal ion diffusion within the photocatalytic layer. In this work, the use of silica interlayers is investigated as a strategy to promote adhesion, efficiency and reusability of TiO2films deposited on aluminum plates. Films were prepared from stable titania sols to avoid the use of nano-powders. Aluminum substrates with different surface morphology were investigated and the role of the silica interlayer thickness was studied. Films were extensively characterized, studying their structure, morphology, optical properties, adhesion and hardness. Self-cleaning properties were studied with respect to their superhydrophilicity and ability to resist fouling via alkylsilanes. Photocatalytic degradation tests were carried out using both volatile organic compounds and NOx, also in recycle tests. The presence of the silica interlayer proved crucial to promote the film robustness and photocatalytic activity. The substrate morphology determined the optimal interlayer thickness, especially in terms of the film reusability.
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Affiliation(s)
- Carolina Cionti
- Università degli Studi di Milano, Department of Chemistry, Milan, Italy
- Consorzio INSTM, Florence, Italy
| | - Ewoud Cosaert
- Ghent University, Department of Solid State Sciences, Ghent, Belgium
| | - Gabriele Deshayes
- Università degli Studi di Milano, Department of Chemistry, Milan, Italy
| | - Ermelinda Falletta
- Università degli Studi di Milano, Department of Chemistry, Milan, Italy
- Consorzio INSTM, Florence, Italy
| | - Daniela Meroni
- Università degli Studi di Milano, Department of Chemistry, Milan, Italy
- Consorzio INSTM, Florence, Italy
| | - Claudia L Bianchi
- Università degli Studi di Milano, Department of Chemistry, Milan, Italy
- Consorzio INSTM, Florence, Italy
| | - Dirk Poelman
- Ghent University, Department of Solid State Sciences, Ghent, Belgium
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9
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Rodríguez-López J, Rangel R, Ramos-Carrazco A, Berman-Mendoza D, Quintana-Owen P, Bartolo-Pérez P, Alvarado-Gil JJ. Columnar nitrogen-doped ZnO nanostructured thin films obtained through atomic layer deposition. NANOTECHNOLOGY 2021; 32:405704. [PMID: 34186516 DOI: 10.1088/1361-6528/ac0fa1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
The present study was aimed to develop nitrogen-doped nanostructured ZnO thin films. These films were produced in a sequential procedure involving the atomic layer deposition technique, and a hydrothermal process supported by microwave heating. Employing the atomic layer deposition technique, through self-limited reactions of diethylzinc (DEZn) and H2O, carried out at 3.29 × 10-4atm and 190 °C, a high-quality ZnO seed was grown on a Si (100) substrate, producing a textured film. In a second stage, columnar ZnO nanostructures were grown perpendicularly oriented to the silicon substrate on those films, using a solvothermal process in a microwave heating facility, employing Zn(NO3)2as zinc precursor, while hexamethylenetetramine (HMTA) was used to produce the bridging of Zn2+ions. The consequence of N-doping concentration on the physicochemical properties of ZnO thin films was studied. The manufactured films were structurally analyzed by scanning electron microscopy and x-ray diffraction. Also, x-ray photoelectron spectroscopy, Raman, and UV-vis spectroscopies were used to provide further insight on the effect of nitrogen doping. The N-doped films displayed textured wurtzite-like structures that changes their preferential growth from the (002) to the (100) crystallographic plane, apparently promoted by the increase of nitrogen precursor. It is also shown that nitrogen-doped films undergo a reduction in their bandgap, compared to ZnO. The methodology presented here provides a viable way to perform high-quality N-ZnO nanostructured thin films.
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Affiliation(s)
- J Rodríguez-López
- División de Estudios de Posgrado de la Facultad de Ingeniería Química, Universidad Michoacana de San Nicólas de Hidalgo, Morelia, Michoacán, Mexico
| | - R Rangel
- División de Estudios de Posgrado de la Facultad de Ingeniería Química, Universidad Michoacana de San Nicólas de Hidalgo, Morelia, Michoacán, Mexico
| | - A Ramos-Carrazco
- Departamento de Investigación en Física, Universidad de Sonora, Hermosillo, Sonora, Mexico
| | - D Berman-Mendoza
- Departamento de Investigación en Física, Universidad de Sonora, Hermosillo, Sonora, Mexico
| | - P Quintana-Owen
- Departamento de Física Aplicada, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional-Unidad Mérida, Mérida, Yucatán, Mexico
| | - P Bartolo-Pérez
- Departamento de Física Aplicada, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional-Unidad Mérida, Mérida, Yucatán, Mexico
| | - J J Alvarado-Gil
- Departamento de Física Aplicada, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional-Unidad Mérida, Mérida, Yucatán, Mexico
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10
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Phuinthiang P, Trinh DTT, Channei D, Ratananikom K, Sirilak S, Khanitchaidecha W, Nakaruk A. Novel Strategy for the Development of Antibacterial TiO 2 Thin Film onto Polymer Substrate at Room Temperature. NANOMATERIALS 2021; 11:nano11061493. [PMID: 34200072 PMCID: PMC8229201 DOI: 10.3390/nano11061493] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/29/2021] [Accepted: 06/01/2021] [Indexed: 11/16/2022]
Abstract
This work demonstrates a novel method to deposit an antibacterial TiO2 thin film on a polymer substrate at room temperature. A combination of sol–gel and photon assistance was used in the experiment in order to avoid any thermal processes of thin film crystallization. The morphological photograph of samples indicated that the TiO2 thin film was perfectly coated on the PVC substrate without any cracks or pinholes. Chemical analysis by EDS and XPS reported that the thin film consisted of titanium (Ti), oxygen (O), and carbon (C). The Raman spectrum proved that the thin film was the anatase phase of TiO2 and, furthermore, that it was contaminated with carbon remaining from the photon assistance process. In addition, the optical band gap of the thin film was 3.35 eV, suggesting that the photocatalytic activity of TiO2 should occur under UV-A radiation. The bacteria viability assay was examined using E. coli and S. typhimurium as indicator strains under UV-A irradiation (365 nm) at different times. The data from OD and CFU count revealed that >97% of bacteria were killed after 60 min of irradiation, and the bacteria were completely killed at 120 min for E. coli and 180 min for S. typhimurium.
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Affiliation(s)
- Patcharaporn Phuinthiang
- Department of Civil Engineering, Faculty of Engineering, Naresuan University, Phitsanulok 65000, Thailand; (P.P.); (W.K.)
- Centre of Excellence for Innovation and Technology for Water Treatment, Faculty of Engineering, Naresuan University, Phitsanulok 65000, Thailand;
| | - Dang Trung Tri Trinh
- Centre of Excellence for Innovation and Technology for Water Treatment, Faculty of Engineering, Naresuan University, Phitsanulok 65000, Thailand;
| | - Duangdao Channei
- Department of Chemistry, Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand;
| | - Khakhanang Ratananikom
- Department of Science and Mathematics, Faculty of Science and Health Technology, Kalasin University, Kalasin 46230, Thailand;
| | - Sirikasem Sirilak
- Department of Community Medicine, Faculty of Medicine, Naresuan University, Phitsanulok 65000, Thailand
- Correspondence: (S.S.); (A.N.)
| | - Wilawan Khanitchaidecha
- Department of Civil Engineering, Faculty of Engineering, Naresuan University, Phitsanulok 65000, Thailand; (P.P.); (W.K.)
- Centre of Excellence for Innovation and Technology for Water Treatment, Faculty of Engineering, Naresuan University, Phitsanulok 65000, Thailand;
| | - Auppatham Nakaruk
- Centre of Excellence for Innovation and Technology for Water Treatment, Faculty of Engineering, Naresuan University, Phitsanulok 65000, Thailand;
- Department of Industrial Engineering, Faculty of Engineering, Naresuan University, Phitsanulok 65000, Thailand
- Correspondence: (S.S.); (A.N.)
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Sugita T, Kobayashi K, Yamazaki T, Isaka M, Itabashi H, Mori M. Development of evaluation method for photocatalytic ability by ion chromatography combined with a flow-type reactor: Application to immobilized photocatalyst materials prepared by double-layer coating method. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Wang Z, Srivastava V, Wang S, Sun H, Thangaraj SK, Jänis J, Sillanpää M. UVC-assisted photocatalytic degradation of carbamazepine by Nd-doped Sb2O3/TiO2 photocatalyst. J Colloid Interface Sci 2020; 562:461-469. [DOI: 10.1016/j.jcis.2019.11.094] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 11/18/2019] [Accepted: 11/23/2019] [Indexed: 01/06/2023]
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Rico-Santacruz M, García-Muñoz P, Marchal C, Batail N, Pham C, Robert D, Keller N. Coating-free TiO2@β-SiC alveolar foams as a ready-to-use composite photocatalyst with tunable adsorption properties for water treatment. RSC Adv 2020; 10:3817-3825. [PMID: 35492643 PMCID: PMC9048602 DOI: 10.1039/c9ra09553e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 01/03/2020] [Indexed: 01/14/2023] Open
Abstract
Coating-free TiO2@β-SiC photocatalytic composite foams gathered within a ready-to-use shell/core alveolar medium the photocatalytically active TiO2 phase and the β-SiC foam structure were prepared via a multi-step shape memory synthesis (SMS) replica method. They were fabricated following a sequential two-step carburization approach, in which an external TiC skin was synthesized at the surface of a β-SiC skeleton foam obtained from a pre-shaped polyurethane foam during a first carburization step. The adsorption behaviour of the shell/core TiO2@β-SiC composite foams towards the Diuron pollutant in water was tuned by submitting the carbide foams to a final calcination treatment within the 550–700 °C temperature range. The controlled calcination step allowed (i) the selective oxidation of the TiC shell into a TiO2 crystallite shell owing to the β-SiC resistance to oxidation and (ii) the amount of residual unreacted carbon in the foams to be tuned. The lower the calcination temperature, the more pronounced the adsorption profiles of the composites and the higher the Diuron amount removed by adsorption on the residual unreacted carbon. The ready-to-use TiO2@β-SiC composite foams were active in the degradation of the Diuron pesticide, without any further post-synthesis immobilization or synthesis process at the foam surface. They displayed good reusability with test cycles and benefitted from an enhanced stability in terms of the titania release to water. Coating-free TiO2@β-SiC photocatalytic composite foams gathering within a ready-to-use shell/core alveolar medium the TiO2 photocatalyst and the β-SiC foam structure were prepared via a multi-step shape memory synthesis (SMS) replica method.![]()
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Affiliation(s)
- Marisa Rico-Santacruz
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES)
- CNRS
- University of Strasbourg
- Strasbourg
- France
| | - Patricia García-Muñoz
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES)
- CNRS
- University of Strasbourg
- Strasbourg
- France
| | - Clément Marchal
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES)
- CNRS
- University of Strasbourg
- Strasbourg
- France
| | | | | | - Didier Robert
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES)
- CNRS
- University of Strasbourg
- Strasbourg
- France
| | - Nicolas Keller
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES)
- CNRS
- University of Strasbourg
- Strasbourg
- France
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14
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Biomedical applications of ultrathin atomic layer deposited metal oxide films on polymeric materials. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/b978-0-08-102572-7.00011-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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15
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Intensification of photocatalytic degradation of organic dyes and phenol by scale-up and numbering-up of meso- and microfluidic TiO2 reactors for wastewater treatment. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.05.020] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Chen A, Bian Z, Xu J, Xin X, Wang H. Simultaneous removal of Cr(VI) and phenol contaminants using Z-scheme bismuth oxyiodide/reduced graphene oxide/bismuth sulfide system under visible-light irradiation. CHEMOSPHERE 2017; 188:659-666. [PMID: 28923729 DOI: 10.1016/j.chemosphere.2017.09.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Revised: 08/15/2017] [Accepted: 09/01/2017] [Indexed: 06/07/2023]
Abstract
An all-solid-state Z-scheme system containing Bi-based semiconductors bismuth oxyiodide (BiOI) and bismuth sulfide (Bi2S3) was constructed on reduced graphene oxide (rGO) sheets through an electrostatic self-assembly method to simultaneously remove aqueous Cr(VI) and phenol. In this Z-scheme that mimicked natural photosynthesis, photoinduced electrons in the conduction band (CB) of BiOI were transferred through rGO and reacted with photoinduced holes in the valence band (VB) of Bi2S3, which significantly increased its photocatalytic activity. The reduction and oxidation reactions were performed on Bi2S3 and BiOI photocatalysts, respectively. Furthermore, complex contaminants of coexisting heavy metal Cr(VI) and organic phenol were treated using the system under visible-light irradiation. Results showed that Cr(VI) reduction and phenol oxidation were achieved efficiently with optimum reductive and oxidative efficiencies up to 73% and 95% under visible-light irradiation, respectively. This work provided a promising method of simultaneously removing heavy metals and organic pollutants by using a Z-scheme system with enhanced photocatalytic activity.
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Affiliation(s)
- Acong Chen
- College of Water Sciences, Beijing Normal University, Beijing 100875, PR China
| | - Zhaoyong Bian
- College of Water Sciences, Beijing Normal University, Beijing 100875, PR China.
| | - Jie Xu
- College of Water Sciences, Beijing Normal University, Beijing 100875, PR China
| | - Xin Xin
- College of Water Sciences, Beijing Normal University, Beijing 100875, PR China
| | - Hui Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China.
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17
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Bamba D, Coulibaly M, Robert D. Nitrogen-containing organic compounds: Origins, toxicity and conditions of their photocatalytic mineralization over TiO 2. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 580:1489-1504. [PMID: 28041693 DOI: 10.1016/j.scitotenv.2016.12.130] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 12/19/2016] [Accepted: 12/19/2016] [Indexed: 05/21/2023]
Abstract
Sustainable water management remains a global concern to meet the food needs of industrial and agricultural activities. Therefore, pollution abatement techniques, cheap and environmentally, are highly desired and recommended. The present review is devoted to the origin and the toxicity of nitrogen-containing organic compounds in water. The progress made in removing these pollutants, in recent years, is addressed. However, a prominent place is given to the photocatalytic degradation process using the TiO2 as a semiconductor, the conditions for good mineralization and especially the factors influencing it. The parameters that impact the performance of this method are the pH, the temperature, the reactor used, the light, the concentration of the pollutant, the amount of catalyst, etc. Up to now, the importance of one parameter relative to another has not been established because in the context of the photocatalytic degradation, certain parameters are often tightly coupled. Consequently, the mineralization is dependent on the initial degree of oxidation of nitrogen atom contained in the pollutant to be degraded. The hydroxyl nitrogen is primarily converted into nitrate ions (NO3-), while the amides and the primary amines are converted into ammonium ions (NH4+).
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Affiliation(s)
- Drissa Bamba
- Laboratoire de Chimie des Eaux (LCE) - Ecole Normale Supérieure d'Abidjan, 08 BP 10 Abidjan 08, Côte d'Ivoire; ICPEES-UMR 7515 CNRS - Université de Strasbourg, Antenne de Saint-Avold, Rue Victor Démange, 57500 Saint-Avold, France.
| | - Mariame Coulibaly
- Laboratoire de Chimie des Eaux (LCE) - Ecole Normale Supérieure d'Abidjan, 08 BP 10 Abidjan 08, Côte d'Ivoire.
| | - Didier Robert
- ICPEES-UMR 7515 CNRS - Université de Strasbourg, Antenne de Saint-Avold, Rue Victor Démange, 57500 Saint-Avold, France.
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18
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Design of inner-motile ZnO@TiO2 mushroom arrays on magnetic cilia film with enhanced photocatalytic performance. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2016.08.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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