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Meroni D, Falletta E, Bianchi CL. Special issue on "Ultrasound meets photocatalysis: recent trends in photocatalyst synthesis, hybrid processes, and piezo-enhanced strategies". Ultrason Sonochem 2024; 104:106825. [PMID: 38438289 PMCID: PMC10985795 DOI: 10.1016/j.ultsonch.2024.106825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Affiliation(s)
- Daniela Meroni
- Università degli Studi di Milano, Department of Chemistry, via Golgi 19, 20133 Milano, Italy.
| | - Ermelinda Falletta
- Università degli Studi di Milano, Department of Chemistry, via Golgi 19, 20133 Milano, Italy.
| | - Claudia L Bianchi
- Università degli Studi di Milano, Department of Chemistry, via Golgi 19, 20133 Milano, Italy.
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Jeyaprakash JS, Rajamani M, Bianchi CL, Ashokkumar M, Neppolian B. Highly efficient ultrasound-driven Cu-MOF/ZnWO 4 heterostructure: An efficient visible-light photocatalyst with robust stability for complete degradation of tetracycline. Ultrason Sonochem 2023; 100:106624. [PMID: 37804558 PMCID: PMC10653955 DOI: 10.1016/j.ultsonch.2023.106624] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/27/2023] [Accepted: 09/27/2023] [Indexed: 10/09/2023]
Abstract
Metal-organic frameworks (MOFs) are a significant class of porous, crystalline materials composed of metal ions (clusters) and organic ligands. The potential use of copper MOF (Cu-BTC) for the sonophotocatalytic degradation of Tetracycline (TC) antibiotic was investigated in this study. To enhance its catalytic efficiency, S-scheme heterojunction was created by combining Cu-BTC with Zinc tungstate (ZnWO4), employing an ultrasound-assisted hydrothermal method. The results demonstrated that the Cu-BTC/ZnWO4 heterojunction exhibited complete removal of TC within 60 min under simultaneous irradiation of visible light and ultrasound. Interestingly, the sonophotocatalytic degradation of TC using the Cu-BTC/ZnWO4 heterojunction showed superior efficiency (with a synergy index of ∼0.70) compared to individual sonocatalytic and photocatalytic degradation processes using the same heterojunction. This enhancement in sonophotocatalytic activity can be attributed to the formation of an S-scheme heterojunction between Cu-BTC and ZnWO4. Within this heterojunction, electrons migrated from Cu-BTC to ZnWO4, facilitated by the interface between the two materials. Under visible light irradiation, the built-in electric field, band edge bending, and coulomb interaction synergistically inhibited the recombination of electron-hole pairs. Consequently, the accumulated electrons in Cu-BTC and holes in ZnWO4 actively participated in the redox reactions, generating free radicals that effectively attacked the TC molecules. This study offers valuable perspectives on the application of a newly developed S-scheme heterojunction photocatalyst, demonstrating its effectiveness in efficiently eliminating diverse recalcitrant pollutants via sonophotocatalytic degradation.
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Affiliation(s)
- Jenson Samraj Jeyaprakash
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, India
| | - Manju Rajamani
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, India
| | - Claudia L Bianchi
- Department of Chemistry, University of Milan, Via Golgi 19, 20133 Milano, Italy; Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), via Giusti 9, 50121 Florence, Italy
| | - Muthupandian Ashokkumar
- Sonochemistry Group, School of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Bernaurdshaw Neppolian
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, India.
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Dell’Oro R, Sansotera M, Bianchi CL, Magagnin L. Efficient BiVO 4-Based Photoanode with Chemically Precipitated Hierarchical Cobalt Borate (Co-B i) Oxygen Evolution Reaction Catalysts. ACS Omega 2023; 8:20332-20341. [PMID: 37323379 PMCID: PMC10268265 DOI: 10.1021/acsomega.3c00104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 05/08/2023] [Indexed: 06/17/2023]
Abstract
The integration of cobalt borate OER catalysts with electrodeposited BiVO4-based photoanodes through a simple drop casting technique was shown to provide an improvement of the photoelectrochemical performance of electrodes under simulated solar light. Catalysts were obtained by chemical precipitation mediated by NaBH4 at room temperature. Scanning electron microscopy (SEM) investigation of precipitates showed a hierarchical structure with globular features covered in nanometric thin sheets providing a large active area, whereas X-ray diffraction (XRD) and Raman spectroscopy highlighted their amorphous structure. The photoelectrochemical behavior of samples was investigated by linear scan voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) techniques. The amount of particles loaded onto BiVO4 absorbers was optimized by variation of the drop cast volume. The enhancement of photocurrent generation by Co-Bi-decorated electrodes with respect to bare BiVO4 was observed with an increase from 1.83 to 3.65 mA/cm2 at 1.23 V vs RHE under AM 1.5 simulated solar light, corresponding to a charge transfer efficiency of 84.6%. The calculated maximum applied bias photon-to-current efficiency (ABPE) value for optimized samples was 1.5% at 0.5 V applied bias. Under constant illumination at 1.23 V vs RHE, a depletion of photoanode performances was observed within an hour, likely due to the detachment of the catalyst from the electrode surface.
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Affiliation(s)
- Ruben Dell’Oro
- Department
of Chemistry, Materials and Chemical Engineering Giulio Natta, Politecnico di Milano, 20131 Milano, Italy
| | - Maurizio Sansotera
- Department
of Chemistry, Materials and Chemical Engineering Giulio Natta, Politecnico di Milano, 20131 Milano, Italy
| | - Claudia L. Bianchi
- Department
of Chemistry, Università degli Studi
di Milano, 20133 Milano, Italy
| | - Luca Magagnin
- Department
of Chemistry, Materials and Chemical Engineering Giulio Natta, Politecnico di Milano, 20131 Milano, Italy
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Bouziani A, Yahya M, Bianchi CL, Falletta E, Celik G. Ternary Polyaniline@Bi 2O 3-BiOCl Nanocomposites as Innovative Highly Active Photocatalysts for the Removal of the Dye under Solar Light Irradiation. Nanomaterials (Basel) 2023; 13:nano13040713. [PMID: 36839080 PMCID: PMC9961263 DOI: 10.3390/nano13040713] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/05/2023] [Accepted: 02/06/2023] [Indexed: 05/31/2023]
Abstract
Ternary PANI@Bi2O3-BiOCl nanocomposites were successfully synthesized during the oxidative polymerization of aniline monomer in the presence of Bi2O3. PANI@Bi2O3-BiOCl nanocomposites were characterized by several analytical techniques, including X-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR), N2 physisorption, UV-Vis Diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS). The effective PANI-semiconductor interaction promotes the fast separation and transfer of photogenerated electrons and holes, enhancing the photocatalytic efficiency of the materials towards methylene blue (MB) degradation under solar light irradiation. The best results were obtained by 0.5%PANI@Bi2O3-BiOCl, leading to 80% MB degradation in 2 h, four times higher than pristine Bi2O3-BiOCl. Moreover, 0.5%PANI@Bi2O3-BiOCl maintained stable photocatalytic performances for four cycles without significant activity loss. Various scavengers (isopropyl alcohol, formic acid, and benzoquinone) were used to identify the active species by trapping holes and radicals generated during the photocatalytic degradation process. Finally, a probable photocatalytic mechanism of PANI@Bi2O3-BiOCl photocatalyst was suggested.
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Affiliation(s)
- Asmae Bouziani
- Chemical Engineering Department, Middle East Technical University, 06800 Ankara, Turkey
| | - Mohamed Yahya
- Department of Chemistry, University of Nevada, Reno 1664 North Virginia Street, Reno, NV 89557, USA
| | - Claudia L. Bianchi
- Department of Chemistry, Università degli Studi di Milano, Via C. Golgi 19, 20133 Milano, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Florence, Italy
| | - Ermelinda Falletta
- Department of Chemistry, Università degli Studi di Milano, Via C. Golgi 19, 20133 Milano, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Florence, Italy
| | - Gokhan Celik
- Chemical Engineering Department, Middle East Technical University, 06800 Ankara, Turkey
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Meroni D, Galloni MG, Cionti C, Cerrato G, Falletta E, Bianchi CL. Efficient Day-and-Night NO 2 Abatement by Polyaniline/TiO 2 Nanocomposites. Materials (Basel) 2023; 16:ma16031304. [PMID: 36770310 PMCID: PMC9920043 DOI: 10.3390/ma16031304] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/20/2023] [Accepted: 02/01/2023] [Indexed: 06/01/2023]
Abstract
Finding innovative and highly performing approaches for NOx degradation represents a key challenge to enhance the air quality of our environment. In this study, the high efficiency of PANI/TiO2 nanostructures in the NO2 abatement both in the dark and under light irradiation is demonstrated for the first time. Heterostructures were synthesized by a "green" method and their composition, structure, morphology and oxidation state were investigated by a combination of characterization techniques. The results show that the unique PANI structure promotes two mechanisms for the NO2 abatement in the dark (adsorption on the polymeric chains and chemical reduction to NO), whereas the photocatalytic behavior prevails under light irradiation, leading to the complete NOx degradation. The best-performing materials were subjected to recycling tests, thereby showing high stability without any significant activity loss. Overall, the presented material can represent an innovative and efficient night-and-day solution for NOx abatement.
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Affiliation(s)
- Daniela Meroni
- Dipartimento di Chimica, Università degli Studi di Milano, via Camillo Golgi 19, 20133 Milano, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), via Giusti 9, 50121 Florence, Italy
| | - Melissa G. Galloni
- Dipartimento di Chimica, Università degli Studi di Milano, via Camillo Golgi 19, 20133 Milano, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), via Giusti 9, 50121 Florence, Italy
| | - Carolina Cionti
- Dipartimento di Chimica, Università degli Studi di Milano, via Camillo Golgi 19, 20133 Milano, Italy
| | - Giuseppina Cerrato
- Dipartimento di Chimica, Università degli Studi di Torino, via Pietro Giuria 7, 10125 Torino, Italy
| | - Ermelinda Falletta
- Dipartimento di Chimica, Università degli Studi di Milano, via Camillo Golgi 19, 20133 Milano, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), via Giusti 9, 50121 Florence, Italy
| | - Claudia L. Bianchi
- Dipartimento di Chimica, Università degli Studi di Milano, via Camillo Golgi 19, 20133 Milano, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), via Giusti 9, 50121 Florence, Italy
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Bortolotto V, Djellabi R, Giordana A, Cerrato G, Michele AD, Bianchi CL. Photocatalytic behaviour of Ag3PO4, Fe3O4 and Ag3PO4/Fe3O4 heterojunction towards the removal of organic pollutants and Cr(VI) from water: Efficiency and light-corrosion deactivation. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109516] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Vinesh V, Preeyanghaa M, Kumar TRN, Ashokkumar M, Bianchi CL, Neppolian B. Revealing the stability of CuWO 4/g-C 3N 4 nanocomposite for photocatalytic tetracycline degradation from the aqueous environment and DFT analysis. Environ Res 2022; 207:112112. [PMID: 34600880 DOI: 10.1016/j.envres.2021.112112] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/16/2021] [Accepted: 09/21/2021] [Indexed: 06/13/2023]
Abstract
Graphitic carbon nitride (g-C3N4) is an emerging metal-free photocatalyst, however, engineering the photocatalytic efficiency for the effective degradation of hazardous molecules is still challenging. An unstable and low bandgap CuWO4 was composited with g-C3N4 to achieve synergistic benefits of tuning the visible light responsiveness and stability of CuWO4. CuWO4/g-C3N4 nanocomposite exhibited a relatively high visible light absorption region and the bandgap was modified from 2.77 to 2.53 eV evidenced via UV-DRS. Moreover, the fast electron transfer rate was observed with CuWO4/g-C3N4 nanocomposite as confirmed using PL and photocurrent studies. XRD, FT-IR, and HR-TEM analyses signified the formation of CuWO4/g-C3N4 nanocomposite. CuWO4/g-C3N4 nanocomposite showed enhanced photocatalytic degradation of Tetracycline (TC) about ∼7.4 fold greater than pristine g-C3N4 in 120 min. Notably, the OH• and •O2- radicals played a most significant role in photocatalytic TC degradation. Furthermore, the energy band structure, density of state, and Bader charge analyses of these molecules were performed.
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Affiliation(s)
- V Vinesh
- Departments of Physics and Nanotechnology and SRM Research Institute, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, India
| | - M Preeyanghaa
- Departments of Physics and Nanotechnology and SRM Research Institute, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, India
| | - T R Naveen Kumar
- Departments of Physics and Nanotechnology and SRM Research Institute, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, India
| | - Muthupandian Ashokkumar
- The School of Chemistry, University of Melbourne, Parkville, Melbourne, Victoria, 3010, Australia
| | - C L Bianchi
- Department of Chemistry, Università degli Studi di Milano, 20133, Milan, Italy
| | - B Neppolian
- Departments of Physics and Nanotechnology and SRM Research Institute, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, India.
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8
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Djellabi R, Ordonez MF, Conte F, Falletta E, Bianchi CL, Rossetti I. A review of advances in multifunctional XTiO 3 perovskite-type oxides as piezo-photocatalysts for environmental remediation and energy production. J Hazard Mater 2022; 421:126792. [PMID: 34396965 DOI: 10.1016/j.jhazmat.2021.126792] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/19/2021] [Accepted: 07/29/2021] [Indexed: 06/13/2023]
Abstract
Over more than three decades, the field of engineering of photocatalytic materials with unique properties and enhanced performance has received a huge attention. In this regard, different classes of materials were fabricated and used for different photocatalytic applications. Among these materials, recently multifunctional XTiO3 perovskites have drawn outstanding interest towards environmental remediation and energy conversion thanks to their unique structural, optical, physiochemical, electrical and thermal characteristics. XTiO3 perovskites are able to initiate different surface catalytic reactions. Under ultrasonic vibration or heating, XTiO3 perovskites can induce piezo-catalytic reactions due to the titling of their conduction and valence bands, resulting in the formation of separated charge carriers in the medium. In addition, under light irradiation, XTiO3 perovskites are considered as a new class of photocatalysts for environmental and energy related applications. Herein, we addressed the recent advances on variously synthesized, doped and formulated XTiO3 perovskite-type oxides showing piezo- and/or photocatalytic exploitation in environmental remediation and energy conversion. The control of structural crystallite size and phase, conductivity, morphology, oxygen vacancy control, doping agents and ratio has a significant role on the photocatalytic and piezocatalytic activities. The different piezo or/and photocatalytic processes mechanistic pathways towards varying applications were discussed. The current challenges facing these materials and future trends were addressed at the end of the review.
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Affiliation(s)
- Ridha Djellabi
- Department of Chemistry, Università degli Studi di Milano, and INSTM Unit Milano-Università, Via Golgi 19, 20133 Milano, Italy
| | - Marcela Frias Ordonez
- Department of Chemistry, Università degli Studi di Milano, and INSTM Unit Milano-Università, Via Golgi 19, 20133 Milano, Italy
| | - Francesco Conte
- Department of Chemistry, Università degli Studi di Milano, INSTM Unit Milano-Università, and CNR-SCITEC, via Golgi 19, 20133 Milano, Italy
| | - Ermelinda Falletta
- Department of Chemistry, Università degli Studi di Milano, and INSTM Unit Milano-Università, Via Golgi 19, 20133 Milano, Italy
| | - Claudia L Bianchi
- Department of Chemistry, Università degli Studi di Milano, and INSTM Unit Milano-Università, Via Golgi 19, 20133 Milano, Italy.
| | - Ilenia Rossetti
- Department of Chemistry, Università degli Studi di Milano, INSTM Unit Milano-Università, and CNR-SCITEC, via Golgi 19, 20133 Milano, Italy
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Bianchi CL, Djellabi R, Della Pina C, Falletta E. Doped-polyaniline based sorbents for the simultaneous removal of heavy metals and dyes from water: Unravelling the role of synthesis method and doping agent. Chemosphere 2022; 286:131941. [PMID: 34426283 DOI: 10.1016/j.chemosphere.2021.131941] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 08/14/2021] [Accepted: 08/17/2021] [Indexed: 05/07/2023]
Abstract
Recently, the engineering of alternative adsorbents with better functional and sorbing ability towards the purification of wastewaters has received much attention from the scientific community. Currently polymers, in particular, are regarded as attractive soft materials in the field of environmental remediation due to their several unique properties. In this regard, the synthesis method is key point to fabricate polymer-based adsorbent with targeted characteristics. In the present work, four polyaniline (PANIs) samples were synthesized by two alternative chemical approaches, a traditional one and an eco-friendly one, and two different dopants were used, HCl and H2SO4, respectively. All PANIs were characterized for their thermal, optical, morphological, and structural properties and their capability to remove simultaneously dyes and heavy metals from water have been investigated. It was deduced that the sorption ability is dependent on the as-synthesized PANI using different procedures and dopants. All the PANIs from traditional method showed high levels of pollutants removal (from 89 to 97%). Even though the materials obtained from the green way are overall less active, H2SO4-doped corresponding polymer showed high sorption capability (75-97%). Finally, the most performing PANIs were selected for recycling tests exhibiting high sorption efficiency retention up to four runs without any regeneration treatment. Most important, the cycling tests were stopped well before the sample sorption limit could be reached.
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Affiliation(s)
- Claudia L Bianchi
- Department of Chemistry, University of Milan, Via C. Golgi 19, 20133, Milan, Italy; INSTM, Via Giusti 9, 50121, Florence, Italy
| | - Ridha Djellabi
- Department of Chemistry, University of Milan, Via C. Golgi 19, 20133, Milan, Italy
| | - Cristina Della Pina
- Department of Chemistry, University of Milan, Via C. Golgi 19, 20133, Milan, Italy; INSTM, Via Giusti 9, 50121, Florence, Italy
| | - Ermelinda Falletta
- Department of Chemistry, University of Milan, Via C. Golgi 19, 20133, Milan, Italy; INSTM, Via Giusti 9, 50121, Florence, Italy; ISTM-CNR, Via Golgi 19, 20133, Milano, Italy.
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Abstract
Intensification of ultrasonic processes for diversified applications, including environmental remediation, extractions, food processes, and synthesis of materials, has received attention from the scientific community and industry. The mechanistic pathways involved in intensification of ultrasonic processes that include the ultrasonic generation of cavitation bubbles, radical formation upon their collapse, and the possibility of fine-tuning operating parameters for specific applications are all well documented in the literature. However, the scale-up of ultrasonic processes with large-scale sonochemical reactors for industrial applications remains a challenge. In this context, this review provides a complete overview of the current understanding of the role of operating parameters and reactor configuration on the sonochemical processes. Experimental and theoretical techniques to characterize the intensity and distribution of cavitation activity within sonoreactors are compared. Classes of laboratory and large-scale sonoreactors are reviewed, highlighting recent advances in batch and flow-through reactors. Finally, examples of large-scale sonoprocessing applications have been reviewed, discussing the major scale-up and sustainability challenges.
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Affiliation(s)
- Daniela Meroni
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Ridha Djellabi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | | | - Claudia L Bianchi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Daria C Boffito
- Département de Génie Chimique, C.P. 6079, Polytechnique Montréal, Montréal H3C 3A7, Canada.,Canada Research Chair in Intensified Mechanochemical Processes for Sustainable Biomass Conversion, Department of Chemical Engineering, Polytechnique Montréal, C.P. 6079, Succ. CV, H3C 3A7 Montréal, Québec Canada
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Falletta E, Bruni A, Sartirana M, Boffito DC, Cerrato G, Giordana A, Djellabi R, Khatibi ES, Bianchi CL. Solar Light Photoactive Floating Polyaniline/TiO 2 Composites for Water Remediation. Nanomaterials (Basel) 2021; 11:3071. [PMID: 34835840 PMCID: PMC8619583 DOI: 10.3390/nano11113071] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/10/2021] [Accepted: 11/12/2021] [Indexed: 11/25/2022]
Abstract
In the present study, the development of innovative polyurethane-polyaniline/TiO2 modified floating materials applied in the sorption and photodegradation of rhodamine B from water matrix under solar light irradiation is reported. All the materials were fabricated with inexpensive and easy approaches and were properly characterized. The effect of the kind of polyaniline (PANI) dopant on the materials' behavior was investigated, as well as the role of the conducting polymer in the pollutant abatement on the basis of its physico-chemical characteristics. Rhodamine B is removed by adsorption and/or photodegradation processes depending on the type of doping agent used for PANI protonation. The best materials were subjected to recycle tests in order to demonstrate their stability under the reaction conditions. The main transformation products formed during the photodegradation process were identified by ultraperformance liquid chromatography-mass spectrometry (UPLC/MS). The results demonstrated that photoactive floating PANI/TiO2 composites are useful alternatives to common powder photocatalysts for the degradation of cationic dyes.
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Affiliation(s)
- Ermelinda Falletta
- Department of Chemistry, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy; (A.B.); (M.S.); (R.D.); (E.S.K.); (C.L.B.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Florence, Italy
| | - Anna Bruni
- Department of Chemistry, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy; (A.B.); (M.S.); (R.D.); (E.S.K.); (C.L.B.)
| | - Marta Sartirana
- Department of Chemistry, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy; (A.B.); (M.S.); (R.D.); (E.S.K.); (C.L.B.)
| | - Daria C. Boffito
- Polytechnique Montréal—Génie Chimique 2900 Boul, Edouard Montpetit—H3T 1J4, Montréal, QC H3C 3A7, Canada;
| | - Giuseppina Cerrato
- Department of Chemistry, Università degli Studi di Torino, Via Pietro Giuria, 7, 10125 Torino, Italy; (G.C.); (A.G.)
| | - Alessia Giordana
- Department of Chemistry, Università degli Studi di Torino, Via Pietro Giuria, 7, 10125 Torino, Italy; (G.C.); (A.G.)
| | - Ridha Djellabi
- Department of Chemistry, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy; (A.B.); (M.S.); (R.D.); (E.S.K.); (C.L.B.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Florence, Italy
| | - Erfan S. Khatibi
- Department of Chemistry, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy; (A.B.); (M.S.); (R.D.); (E.S.K.); (C.L.B.)
| | - Claudia L. Bianchi
- Department of Chemistry, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy; (A.B.); (M.S.); (R.D.); (E.S.K.); (C.L.B.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Via Giusti 9, 50121 Florence, Italy
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Djellabi R, Zhao X, Ordonez MF, Falletta E, Bianchi CL. Comparison of the photoactivity of several semiconductor oxides in floating aerogel and suspension systems towards the reduction of Cr(VI) under visible light. Chemosphere 2021; 281:130839. [PMID: 34000659 DOI: 10.1016/j.chemosphere.2021.130839] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/08/2021] [Accepted: 05/04/2021] [Indexed: 06/12/2023]
Abstract
A massive amount of research has been done over the last three decades to develop photoactive materials which could be suitable for real-world use in water remediation sector. Water-floating photocatalysts could be one of the best options due to their technological characteristics in terms of efficiency and reasonability including a high oxygenation of the photocatalyst surface, a fully sunlight irradiation, easy recovery and reuse. In the present study, aerogel water-floating based materials were fabricated using poly(vinyl alcohol) and polyvinylidene fluoride as a polymer platform, and loaded with different semiconductors such as g-C3N4, MoO3, Bi2O3, Fe2O3 or WO3. The photocatalytic efficiencies of aerogel floating materials and the suspension of above-mentioned semiconductors were compared evaluating the photoreduction of Cr(VI) under visible light (λ > 420 nm). The results showed that Fe2O3 suspension was the most efficient but the slowest in floating system. On the contrary, g-C3N4 exhibited a good performance in suspension system, and on top of that it was very effective in floating system, wherein it ensures a total reduction of 10 ppm-Cr(VI) to Cr(III) within 20 min.
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Affiliation(s)
- Ridha Djellabi
- Università Degli Studi di Milano, Dip. Chimica and INSTM-UdR Milano, Via Golgi, 19, 20133, Milano, Italy.
| | - Xu Zhao
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Marcela Frias Ordonez
- Università Degli Studi di Milano, Dip. Chimica and INSTM-UdR Milano, Via Golgi, 19, 20133, Milano, Italy
| | - Ermelinda Falletta
- Università Degli Studi di Milano, Dip. Chimica and INSTM-UdR Milano, Via Golgi, 19, 20133, Milano, Italy
| | - Claudia L Bianchi
- Università Degli Studi di Milano, Dip. Chimica and INSTM-UdR Milano, Via Golgi, 19, 20133, Milano, Italy
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13
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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14
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Foroutan R, Peighambardoust SJ, Hemmati S, Ahmadi A, Falletta E, Ramavandi B, Bianchi CL. Zn 2+ removal from the aqueous environment using a polydopamine/hydroxyapatite/Fe 3O 4 magnetic composite under ultrasonic waves. RSC Adv 2021; 11:27309-27321. [PMID: 35480667 PMCID: PMC9037841 DOI: 10.1039/d1ra04583k] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 08/03/2021] [Indexed: 12/16/2022] Open
Abstract
In this study, an easily magnetically recoverable polydopamine (PDA)-modified hydroxyapatite (HAp)/Fe3O4 magnetic composite (HAp/Fe3O4/PDA) was suitably synthesized to exploit its adsorption capacity to remove Zn2+ from aqueous solution, and its structural properties were thoroughly examined using different analytical techniques. The effect of multiple parameters like pH, ultrasonic power, ultrasonic time, adsorbent dose, and initial Zn2+ concentration on the adsorption efficiency was assessed using RSM-CCD. According to the acquired results, by increasing the adsorbent quantity, ultrasonic power, ultrasonic time, and pH, the Zn2+ adsorption efficiency increased and the interaction between the variables of ultrasonic power/Zn2+ concentration, pH/Zn2+ concentration, pH/absorbent dose, and ultrasonic time/adsorbent dose has a vital role in the Zn2+ adsorption. The uptake process of Zn2+ onto PDA/HAp/Fe3O4 followed Freundlich and pseudo-second order kinetic models. The maximum capacity of Zn2+ adsorption (q m) obtained by PDA/HAp/Fe3O4, HAp/Fe3O4, and HAp was determined as 46.37 mg g-1, 40.07 mg g-1, and 37.57 mg g-1, respectively. Due to its good performance and recoverability (ten times), the HAp/Fe3O4/PDA magnetic composite can be proposed as a good candidate to eliminate Zn2+ ions from a water solution.
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Affiliation(s)
- Rauf Foroutan
- Faculty of Chemical and Petroleum Engineering, University of Tabriz Tabriz 5166616471 Iran
| | | | - Saeed Hemmati
- Department of Chemical Engineering, Bushehr Branch, Islamic Azad University Bushehr Iran
| | - Amir Ahmadi
- Department of Chemical Engineering, Bushehr Branch, Islamic Azad University Bushehr Iran
| | - Ermelinda Falletta
- Università degli Studi di Milano - Department of Chemistry via Golgi 19 20133 Milan Italy .,Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM) via Giusti 9 50121 Florence Italy
| | - Bahman Ramavandi
- Departments of Environmental Health Engineering, Faculty of Health and Nutrition, Bushehr University of Medical Sciences Bushehr Iran
| | - Claudia L Bianchi
- Università degli Studi di Milano - Department of Chemistry via Golgi 19 20133 Milan Italy .,Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM) via Giusti 9 50121 Florence Italy
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15
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Affiliation(s)
- Claudia L. Bianchi
- Department of Chemistry University of Milan Milan Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM) Florence Italy
| | | | - Alessandro Ponti
- Istituto di Scienze e Tecnologie Chimiche "Giulio Natta" (SCITEC) Consiglio Nazionale delle Ricerche Milan Italy
| | | | - Ermelinda Falletta
- Department of Chemistry University of Milan Milan Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM) Florence Italy
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16
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Meroni D, Bianchi CL, Boffito DC, Cerrato G, Bruni A, Sartirana M, Falletta E. Piezo-enhanced photocatalytic diclofenac mineralization over ZnO. Ultrason Sonochem 2021; 75:105615. [PMID: 34111723 PMCID: PMC8193124 DOI: 10.1016/j.ultsonch.2021.105615] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 05/17/2021] [Accepted: 05/28/2021] [Indexed: 05/08/2023]
Abstract
The degradation of diclofenac has been realized for the first time by a piezo-enhanced sonophotocatalytic approach based on ZnO. The sonophotocatalytic degradation showed a slight enhancement in the degradation of the parent compound, whereas strong synergistic effects were observed for the mineralization process when suitable ZnO morphologies are used, reaching 70% of complete degradation of 25 ppm diclofenac using 0.1 g/L ZnO in 360 min. Tests in a complex water matrix show enhanced diclofenac removal, outperforming a TiO2 benchmark photocatalyst. These promising experimental results promote this process as a good alternative to traditional degradation approaches for remediation of real water matrices.
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Affiliation(s)
- Daniela Meroni
- Department of Chemistry, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy; Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), via Giusti 9, 50121 Florence, Italy.
| | - Claudia L Bianchi
- Department of Chemistry, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy; Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), via Giusti 9, 50121 Florence, Italy
| | - Daria C Boffito
- Polytechnique Montréal - Génie Chimique 2900 Boul, Edouard Montpetit - H3T 1J4, Montréal, QC, Canada
| | - Giuseppina Cerrato
- Department of Chemistry, Università degli Studi di Torino, via Pietro Giuria, 7, 10125 Torino, Italy
| | - Anna Bruni
- Department of Chemistry, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
| | - Marta Sartirana
- Department of Chemistry, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
| | - Ermelinda Falletta
- Department of Chemistry, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy; Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), via Giusti 9, 50121 Florence, Italy; ISTM-CNR, via Golgi 19, 20133 Milano, Italy.
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17
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Laajimi H, Mattia M, Stein RS, Bianchi CL, Boffito DC. Electron paramagnetic resonance of sonicated powder suspensions in organic solvents. Ultrason Sonochem 2021; 73:105544. [PMID: 33819869 PMCID: PMC8047979 DOI: 10.1016/j.ultsonch.2021.105544] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/20/2021] [Accepted: 03/23/2021] [Indexed: 05/08/2023]
Abstract
The chemical effects of the acoustic cavitation generated by ultrasound translates into the production of highly reactive radicals. Acoustic cavitation is widely explored in aqueous solutions but it remains poorly studied in organic liquids and in particular in liquid/solid media. However, several heterogeneous catalysis reactions take place in organic solvents. Thus, we sonicated trimethylene glycol and propylene glycol in the presence of silica particles (SiO2) of different sizes (5-15 nm, 0.2-0.3 µm, 12-26 µm) and amounts (0.5 wt% and 3 wt%) at an ultrasound frequency of 20 kHz to quantify the radicals generated. The spin trap 5,5-dimethyl-1-pyrrolin-N-oxide (DMPO) was used to trap the generated radicals for study by electron paramagnetic resonance (EPR) spectroscopy. We identified the trapped radical as the hydroxyalkyl radical adduct of DMPO, and we quantified it using stable radical 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) as a quantitation standard. The concentration of DMPO spin adducts in solutions containing silica size 12-26 µm was higher than the solution without particles. The presence of these particles increased the concentration of the acoustically generated radicals by a factor of 1.5 (29 µM for 0.5 wt% of SiO2 size 12-26 µm vs 19 µM for 0 wt%, after 60 min of sonication). Ultrasound produced fewest radicals in solutions with the smallest particles; the concentration of radical adducts was highest for SiO2 particle size 12-26 µm at 0.5 wt% loading, reaching 29 µM after 60 min sonication. Ultrasound power of 50.6 W produced more radicals than 24.7 W (23 µM and 18 µM, respectively, at 30 min sonication). Increased temperature during sonication generated more radical adducts in the medium (26 µM at 75 °C and 18 µM at 61 °C after 30 min sonication). Acoustic cavitation, in the presence of silica, increased the production of radical species in the studied organic medium.
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Affiliation(s)
- Héla Laajimi
- Polytechnique Montréal - Department of Chemical Engineering, C.P. 6079, Centre Ville, H3C 3A7 Montréal, QC, Canada
| | - Michela Mattia
- Università degli Studi di Milano - Chemistry Department, via Golgi 19, 20133 Milan, Italy
| | - Robin S Stein
- McGill University - Chemistry Department, 801 Rue Sherbrooke Ouest, Montréal QC H3A 0B8, QC, Canada
| | - Claudia L Bianchi
- Università degli Studi di Milano - Chemistry Department, via Golgi 19, 20133 Milan, Italy
| | - Daria C Boffito
- Polytechnique Montréal - Department of Chemical Engineering, C.P. 6079, Centre Ville, H3C 3A7 Montréal, QC, Canada.
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18
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Meroni D, Jiménez-Salcedo M, Falletta E, Bresolin BM, Kait CF, Boffito DC, Bianchi CL, Pirola C. Sonophotocatalytic degradation of sodium diclofenac using low power ultrasound and micro sized TiO 2. Ultrason Sonochem 2020; 67:105123. [PMID: 32283492 DOI: 10.1016/j.ultsonch.2020.105123] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/02/2020] [Accepted: 04/06/2020] [Indexed: 05/24/2023]
Abstract
The nonsteroidal anti-inflammatory drug sodium diclofenac (DC) is an emerging water pollutant which resists conventional wastewater treatments. Here the sonophotocatalytic degradation of DC was carried out using micrometric TiO2 (both pristine and Ag-decorated), UV-A irradiation and 20 kHz pulsed ultrasound. Sonophotocatalytic tests were compared with photolysis, sonolysis, sonophotolysis, sonocatalysis and photocatalysis data performed in the same conditions. A synergy index of over 2 was determined for tests with pristine TiO2, while values close to 1.3 were observed for Ag-TiO2. Reaction intermediates were studied by HPLC-MS, showing degradation mechanisms activated by hydroxyl radicals. Similar pathways were identified for photocatalytic and sonophotocatalytic tests, although the latter led to more oxidized compounds. Different reactor configurations (static and dynamic set ups) were studied. Sequential and simultaneous application of UV light and ultrasound led to similar performance. The role of water matrix was investigated using ultrapure and drinking water, showing marked detrimental effects of electrolytes on the DC degradation. Overall, the combined treatment proved more efficient than photocatalysis alone especially in demanding working conditions, like in drinking water matrices.
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Affiliation(s)
- Daniela Meroni
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi, 19 - 20133 Milano, Italy
| | - Marta Jiménez-Salcedo
- University of La Rioja, Centro de Investigación en Síntesis Química (CISQ), Department of Chemistry, C/ Madre de Dios 51, E-26006 Logroño La Rioja, Spain
| | - Ermelinda Falletta
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi, 19 - 20133 Milano, Italy
| | - Bianca M Bresolin
- Lappeenranta University of Technology, Laboratory of Green Chemistry, School of Engineering Science, Sammonkatu 12-50130, Mikkeli, Finland
| | - Chong Fai Kait
- Universiti Teknologi PETRONAS, Fundamental & Applied Sciences Department, 32610 Seri Iskandar, Malaysia
| | - Daria C Boffito
- Polytechnique Montréal - Génie Chimique 2900 Boul, Edouard Montpetit - H3T 1J4, Montréal, QC, Canada
| | - Claudia L Bianchi
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi, 19 - 20133 Milano, Italy
| | - Carlo Pirola
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi, 19 - 20133 Milano, Italy.
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19
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Meroni D, Gasparini C, Di Michele A, Ardizzone S, Bianchi CL. Ultrasound-assisted synthesis of ZnO photocatalysts for gas phase pollutant remediation: Role of the synthetic parameters and of promotion with WO 3. Ultrason Sonochem 2020; 66:105119. [PMID: 32252008 DOI: 10.1016/j.ultsonch.2020.105119] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/12/2020] [Accepted: 03/30/2020] [Indexed: 05/24/2023]
Abstract
The synthesis of ZnO photocatalysts by ultrasound-assisted technique was here investigated. Several experimental parameters including the zinc precursor (acetate, chloride, nitrate), sonication conditions (amplitude, pulse) and post-synthetic thermal treatment (up to 500 °C) were studied. Crystalline ZnO samples were obtained without thermal treatments due to the adopted reactant ratios and synthesis temperature. Sonication plays a major role on the morphological oxide features in terms of particle size and surface area, the latter showing a 20-fold increase with respect to conventional synthesis. Interestingly, 1 and 3 s sonication pulses led to morphological properties similar to continuous sonication. A thermal treatment at moderate temperatures (400-450 °C) promoted the loss of surface hydroxylation and the formation of lattice defects, while higher temperatures were detrimental for the sample morphology. The prepared ZnO was decorated with WO3 particles comparing an ultrasound-assisted technique using 1 s pulses with a conventional approach, giving rise to composites with promoted visible light absorption. Samples were tested towards the photocatalytic degradation of nitrogen oxides (500-1000 ppb) in humidified air under both UV and visible light. By carefully controlling the synthetic procedure, better performance were observed with respect to the commercial benchmark. Samples from ultrasound-assisted syntheses, also in the case of pulsed sonication, showed consistently better results than conventional references, in particular for ZnO-WO3 composites. The composite by ultrasound-assisted synthesis showed > 95% degradation in 180 min and doubled NOx degradation under visible light with respect to the conventional composite.
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Affiliation(s)
- Daniela Meroni
- Department of Chemistry, Università degli Studi di Milano, Italy; Consorzio INSTM, Florence, Italy.
| | - Cinzia Gasparini
- Department of Chemistry, Università degli Studi di Milano, Italy
| | | | - Silvia Ardizzone
- Department of Chemistry, Università degli Studi di Milano, Italy; Consorzio INSTM, Florence, Italy
| | - Claudia L Bianchi
- Department of Chemistry, Università degli Studi di Milano, Italy; Consorzio INSTM, Florence, Italy
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20
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Bianchi CL, Cerrato G, Pirola C, Galli F, Capucci V. Photocatalytic porcelain grés large slabs digitally coated with AgNPs-TiO 2. Environ Sci Pollut Res Int 2019; 26:36117-36123. [PMID: 31020536 DOI: 10.1007/s11356-019-05218-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 04/16/2019] [Indexed: 06/09/2023]
Abstract
TiO2 is employed as both photocatalytic and structural materials, leading to its applications in external coatings or in interior furnishing devices, including cement mortar, tiles, floorings, and glass supports. The authors have already demonstrated the efficiency of photoactive micro-sized TiO2 and here its industrial use is reported using the digital printing to coat porcelain grés slabs. Many advantages are immediately evident, namely rapid and precise deposition, no waste of raw materials, thus positively affecting the economy of the process. Data for the thin films deposited by digital printing were compared with those obtained for the conventional spray method. The use of metal-doped TiO2 is also reported so that the photoactivity of these materials can be exploited even under LED light. The digital inkjet printed coatings exhibited superior photocatalytic performance owing to both higher exposed surface area and greater volume of deposited anatase, as well as the greater areal distribution density of thinly and thickly coated regions. Moreover, the presence of TiO2 doped silver increased the efficiency of the materials in NOx degradation both under UVA and LED lights.
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Affiliation(s)
- Claudia L Bianchi
- Dipartimento di Chimica, Università di Milano, Via Golgi 19, 20133, Milano, Italy.
| | - Giuseppina Cerrato
- Dipartimento di Chimica & NIS Interdept. Centre, Università di Torino, Via P. Giuria 7, 10125, Torino, Italy
| | - Carlo Pirola
- Dipartimento di Chimica, Università di Milano, Via Golgi 19, 20133, Milano, Italy
| | - Federico Galli
- Dipartimento di Chimica, Università di Milano, Via Golgi 19, 20133, Milano, Italy
| | - Valentino Capucci
- IrisCeramica Group, Via Ghiarola Nuova 119, 41042, Fiorano M.se (MO), Italy
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21
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Leon-Garzon AR, Dotelli G, Tommasini M, Bianchi CL, Pirola C, Villa A, Lucotti A, Sacchi B, Barbieri L. Experimental Characterization of Polymer Surfaces Subject to Corona Discharges in Controlled Atmospheres. Polymers (Basel) 2019; 11:polym11101646. [PMID: 31658775 PMCID: PMC6836313 DOI: 10.3390/polym11101646] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/24/2019] [Accepted: 10/08/2019] [Indexed: 12/05/2022] Open
Abstract
Polymeric dielectrics are employed extensively in the power transmission industry, thanks to their excellent properties; however, under normal operating conditions these materials tend to degrade and fail. In this study, samples of low-density polyethylene, polypropylene, polymethyl methacrylate, and polytetrafluorethylene were subjected to corona discharges under nitrogen and air atmospheres. The discharges introduced structural modifications over the polymer surface. From a chemical perspective, the alterations are analogous among the non-fluorinated polymers (i.e., polyethylene (PE), polypropylene (PP), and polymethyl methacrylate (PMMA)). A simulation of the corona discharge allowed the identification of highly reactive species in the proximity of the surface. The results are consistent with the degradation of insulating polymers in high-voltage applications due to internal partial discharges that ultimately lead to the breakdown of the material.
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Affiliation(s)
- Andres R Leon-Garzon
- Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta", Politecnico di Milano, 20133 Milano, Italy.
| | - Giovanni Dotelli
- Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta", Politecnico di Milano, 20133 Milano, Italy.
| | - Matteo Tommasini
- Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta", Politecnico di Milano, 20133 Milano, Italy.
| | - Claudia L Bianchi
- Dipartimento di Chimica, Università degli Studi di Milano, 20133 Milano, Italy.
| | - Carlo Pirola
- Dipartimento di Chimica, Università degli Studi di Milano, 20133 Milano, Italy.
| | - Andrea Villa
- Ricerca sul Sistema Energetico (RSE S.p.A.), 20134 Milano, Italy.
| | - Andrea Lucotti
- Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta", Politecnico di Milano, 20133 Milano, Italy.
| | - Benedetta Sacchi
- Dipartimento di Chimica, Università degli Studi di Milano, 20133 Milano, Italy.
| | - Luca Barbieri
- Ricerca sul Sistema Energetico (RSE S.p.A.), 20134 Milano, Italy.
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22
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Lefebvre J, Galli F, Bianchi CL, Patience GS, Boffito DC. Experimental methods in chemical engineering: X‐ray photoelectron spectroscopy‐XPS. CAN J CHEM ENG 2019. [DOI: 10.1002/cjce.23530] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Josianne Lefebvre
- Department of Engineering PhysicsPolytechnique MontréalC.P. 6079, Succ. CV Montréal, QC, H3C 3A7 Canada
| | - Federico Galli
- Dipartimento di ChimicaUniversitá degli Studi di Milanovia Golgi 19, 20133 Milano Italy
| | - Claudia L. Bianchi
- Dipartimento di ChimicaUniversitá degli Studi di Milanovia Golgi 19, 20133 Milano Italy
| | - Gregory S. Patience
- Department of Chemical EngineeringPolytechnique MontréalC.P. 6079, Succ. CV Montréal, QC, H3C 3A7 Canada
| | - Daria C. Boffito
- Department of Chemical EngineeringPolytechnique MontréalC.P. 6079, Succ. CV Montréal, QC, H3C 3A7 Canada
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23
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Schieppati D, Galli F, Peyot ML, Yargeau V, Bianchi CL, Boffito DC. An ultrasound-assisted photocatalytic treatment to remove an herbicidal pollutant from wastewaters. Ultrason Sonochem 2019; 54:302-310. [PMID: 30712858 DOI: 10.1016/j.ultsonch.2019.01.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Revised: 01/11/2019] [Accepted: 01/21/2019] [Indexed: 05/08/2023]
Abstract
Pollutants of emerging concern contaminate surface and ground water. Advanced oxidation processes treat these molecules and degrade them into smaller compounds or mineralization products. However, little information on coupled advanced oxidation techniques and on the degradation pathways of these pollutants is available to identify possible ecotoxic subproducts. In the present work, we investigate the ultrasound assisted photocatalytic degradation pathway of the herbicide Isoproturon. We worked in batch mode in a thermostatic glass reactor. We compared the activity of nanometric TiO2 P25 with that of Kronos 1077, a micrometric TiO2. We discuss the individual, additive and synergistic degradation action of photolysis, sonolysis, sonophotolysis, and sonophotocatalysis by varying catalyst loading and/or ultrasound power for the last three techniques. With 0.1 g L-1 catalyst, photocatalysis and sonophotopcatalysis completely degrade Isoproturon within 240 min and 60 min, respectively (>99% conversion). Sonophotocatalysis breaks Isoproturon down into smaller molecules than photocatalysis alone.
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Affiliation(s)
- D Schieppati
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy; Department of Chemical Engineering, Polytechnique Montréal, C.P. 6079, Succ. CV Montréal, H3C 3A7 Québec, Canada
| | - F Galli
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy.
| | - M-L Peyot
- Department of Chemical Engineering, McGill University, 3610 University St., Montréal, H3A 2B2 Québec, Canada
| | - V Yargeau
- Department of Chemical Engineering, McGill University, 3610 University St., Montréal, H3A 2B2 Québec, Canada
| | - C L Bianchi
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
| | - D C Boffito
- Department of Chemical Engineering, Polytechnique Montréal, C.P. 6079, Succ. CV Montréal, H3C 3A7 Québec, Canada
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Allieta M, Marelli M, Malara F, Bianchi CL, Santangelo S, Triolo C, Patane S, Ferretti AM, Kment Š, Ponti A, Naldoni A. Shaped‐controlled silicon‐doped hematite nanostructures for enhanced PEC water splitting. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.10.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Stucchi M, Cerrato G, Bianchi CL. Ultrasound to improve both synthesis and pollutants degradation based on metal nanoparticles supported on TiO 2. Ultrason Sonochem 2019; 51:462-468. [PMID: 30001881 DOI: 10.1016/j.ultsonch.2018.07.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 07/04/2018] [Accepted: 07/05/2018] [Indexed: 06/08/2023]
Abstract
Sonochemistry is based on acoustic cavitation, which consist in the formation, growth, and implosive collapse of bubbles within a liquid. Collapsing bubbles generate localized hot spots, characterized by temperatures up to 5000 K and pressures up to 1800 atm. These extreme conditions allow producing a variety of nanostructured and amorphous materials, as well as they are advantageous for chemical processes. Ultrasound requires inexpensive equipment and fewer steps than conventional methods. Combining ultrasound and photocatalysis enhances the performance of the processes, reduces reaction time, avoids the use of extreme physical conditions and improves the photocatalytic materials properties increasing their activity. Here, we reported the positive effect of US in synthesizing Me-modified TiO2 (Me = Ag, Cu, Mn) for pollutants degradation in gas-phase; also, we proved the advantageous application of ultrasound for the photocatalytic removal of organic compounds in water. Ultrasound produced more efficient Me-doped TiO2, which showed higher activity in visible light. When combined with photocatalytic water treatment, the organic compounds degradation and mineralization increases.
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Affiliation(s)
- M Stucchi
- University of Milan, Chemistry Department, Via Golgi 19, 20133 Milano, Italy
| | - G Cerrato
- University of Turin, Chemistry Department, Via P. Giuria 7, 10125 Torino, Italy; Consorzio INSTM, Firenze, Italy
| | - C L Bianchi
- University of Milan, Chemistry Department, Via Golgi 19, 20133 Milano, Italy; Consorzio INSTM, Firenze, Italy.
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Cerrato G, Bianchi CL, Galli F, Pirola C, Morandi S, Capucci V. Micro-TiO 2 coated glass surfaces safely abate drugs in surface water. J Hazard Mater 2019; 363:328-334. [PMID: 30321837 DOI: 10.1016/j.jhazmat.2018.09.057] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 09/20/2018] [Accepted: 09/21/2018] [Indexed: 06/08/2023]
Abstract
The ingredients of Pharmaceuticals and Personal Care Products (PPCPs) persist in water and conventional treatment plants are not able to remove them efficiently. Sonochemical treatment is insufficient to mineralize organics such as ibuprofen into CO2 and H2O. TiO2 degrades ibuprofen (IBP) under UV light; however, it does not reach a high grade of conversion. Here, we investigated the mineralization of ibuprofen to CO2 by TiO2 UV-C photocatalysis. We replaced nano-sized P25 (the standard catalyst) with a micro-sized commercial sample of TiO2 to preclude the use of nanoparticles which are dangerous for human health and because typical filtration systems are expensive and inefficient. We deposited micro-TiO2 on glass Raschig rings to ensure an easy recovery and reuse of the photocatalyst and we studied its performance both with a batch and a continuous reactor. Micro-TiO2 mineralized 100% of IBP in 24 h. TiO2-coated glass Raschig rings degraded 87% of IBP in 6 h of UV-C irradiation in a continuous reactor, with a mineralization of 25%. Electronspray ionization mass spectrometer (ESI-MS, positive mode) analyses identified 13 different byproducts and we hypothised a degradration pathway for IBP degradation.
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Affiliation(s)
- G Cerrato
- Università degli Studi di Torino, Dip. Chimica & NIS Interdept. Centre, via P. Giuria 7, 10125 Torino, Italy; INSTM - Consorzio Interuniversitario per la scienza e tecnologia dei Materiali, via G. Giusti 9, 50121 Firenze, Italy.
| | - C L Bianchi
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy; INSTM - Consorzio Interuniversitario per la scienza e tecnologia dei Materiali, via G. Giusti 9, 50121 Firenze, Italy
| | - F Galli
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy; INSTM - Consorzio Interuniversitario per la scienza e tecnologia dei Materiali, via G. Giusti 9, 50121 Firenze, Italy
| | - C Pirola
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy; INSTM - Consorzio Interuniversitario per la scienza e tecnologia dei Materiali, via G. Giusti 9, 50121 Firenze, Italy
| | - S Morandi
- Università degli Studi di Torino, Dip. Chimica & NIS Interdept. Centre, via P. Giuria 7, 10125 Torino, Italy; INSTM - Consorzio Interuniversitario per la scienza e tecnologia dei Materiali, via G. Giusti 9, 50121 Firenze, Italy
| | - V Capucci
- GranitiFiandre SpA, 41042 Fiorano M.se, Italy
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Bianchi CL, Sacchi B, Capelli S, Pirola C, Cerrato G, Morandi S, Capucci V. Micro-sized TiO 2 as photoactive catalyst coated on industrial porcelain grès tiles to photodegrade drugs in water. Environ Sci Pollut Res Int 2018; 25:20348-20353. [PMID: 28452026 DOI: 10.1007/s11356-017-9066-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 04/19/2017] [Indexed: 06/07/2023]
Abstract
Pharmaceutical compounds and their metabolites raise worrying questions because of their continuous release and lack of efficient removal by conventional wastewater treatments; therefore, they are being detected in groundwater, surface water and drinking water in increasing concentrations. Paracetamol and aspirin are two of the most commonly used drugs employed as fever reducer, analgesic and anti-inflammatory. They and their metabolites are very often found in river water, so their degradation is necessary in order to render water suitable for human consumption. The present work is focused on the comparison of the photocatalytic performance of industrial active grés porcelain tiles covered with a commercial micro-sized TiO2 by industrial process using either conventional spray deposition or innovative digital printing methods. The photodegradation of two commonly used drugs, namely aspirin and paracetamol, was investigated both individually and as a mixture, in both deionized and tap water. The results reveal the full conversion of the drugs and the significant role of the photocatalytic tiles in the mineralization processes leading to harmless inorganic species. In particular, the digitally printed tiles exhibited better photodegradation performance for both drugs compared to the spray deposited tiles. No deactivation was observed on both photocatalytic tiles.
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Affiliation(s)
- Claudia L Bianchi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy.
- Consorzio INSTM, Via Giusti 9, 50121, Florence, Italy.
| | - Benedetta Sacchi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy
- Consorzio INSTM, Via Giusti 9, 50121, Florence, Italy
| | - Sofia Capelli
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy
| | - Carlo Pirola
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy
- Consorzio INSTM, Via Giusti 9, 50121, Florence, Italy
| | - Giuseppina Cerrato
- Consorzio INSTM, Via Giusti 9, 50121, Florence, Italy
- Dipartimento di Chimica & NIS, Inter-departmental Centre, Università degli Studi di Torino, Via Giuria 7, 10125, Torino, Italy
| | - Sara Morandi
- Consorzio INSTM, Via Giusti 9, 50121, Florence, Italy
- Dipartimento di Chimica & NIS, Inter-departmental Centre, Università degli Studi di Torino, Via Giuria 7, 10125, Torino, Italy
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Galli F, Previtali D, Bozzano G, Bianchi CL, Manenti F, Pirola C. Production and application of O 2 enriched air produced by fresh and salt water desorption in chemical plants. J Environ Manage 2018; 217:621-628. [PMID: 29649734 DOI: 10.1016/j.jenvman.2018.03.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 02/23/2018] [Accepted: 03/31/2018] [Indexed: 06/08/2023]
Abstract
Oxygen enriched air intensifies oxidation processes since smaller reactors reach the same conversion of typical unit operations that employ simple air as reactant. However, the cost to produce pure oxygen or oxygen enriched air with traditional methods, i.e. cryogenic separation or membrane technologies, may be unaffordable. Here, we propose a new continuous technology for gas mixture separation, focusing on the production of oxygen enriched air as a case study. This operation is an absorption-desorption process that takes advantage of the higher oxygen solubility in water compared to nitrogen. In a pressurized solubilisation tank, water absorbs air. Subsequently, reducing pressure desorbs oxygen enriched air. PRO/II 9.3 (Simsci-Scheider Electrics) simulated, optimized, and calculated the capital and operative expenses of this technology. Moreover, we tested for the first time salt water instead of distilled water as appealing possibility for chemical plant near sea and ocean. We varied the inlet water flowrate between 5 and 15 m3/h. The optimum operative absortion unit pressure is 15-35 barg. After degassing, water may be recycled. With salt water, the extracted quantity of enriched air decreases compared with the desorption from fresh water (20% less), while the concentration of oxygen is independent from the salt concentration. The cost of enriched air at the optimum condition is 2-3.35 EUR/Nm3.
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Affiliation(s)
- F Galli
- Department of Chemical Engineering, École Polytechnique de Montréal, Montreal, Quebec H3C3A7, Canada
| | - D Previtali
- Politecnico di Milano, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Piazza Leonardo da Vinci 32, 20133, Milano, Italy
| | - G Bozzano
- Politecnico di Milano, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Piazza Leonardo da Vinci 32, 20133, Milano, Italy
| | - C L Bianchi
- Università di Milano, Dipartimento di Chimica, via Golgi, 19, 20133, Milano, Italy
| | - F Manenti
- Politecnico di Milano, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Piazza Leonardo da Vinci 32, 20133, Milano, Italy
| | - C Pirola
- Università di Milano, Dipartimento di Chimica, via Golgi, 19, 20133, Milano, Italy.
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Sansotera M, Talaeemashhadi S, Gambarotti C, Pirola C, Longhi M, Ortenzi MA, Navarrini W, Bianchi CL. Comparison of Branched and Linear Perfluoropolyether Chains Functionalization on Hydrophobic, Morphological and Conductive Properties of Multi-Walled Carbon Nanotubes. Nanomaterials (Basel) 2018; 8:E176. [PMID: 29562718 PMCID: PMC5869667 DOI: 10.3390/nano8030176] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 03/15/2018] [Accepted: 03/15/2018] [Indexed: 12/03/2022]
Abstract
The functionalization of multi-walled carbon nanotubes (MW-CNTs) was obtained by generating reactive perfluoropolyether (PFPE) radicals that can covalently bond to MW-CNTs' surface. Branched and linear PFPE peroxides with equivalent molecular weights of 1275 and 1200 amu, respectively, have been thermally decomposed for the production of PFPE radicals. The functionalization with PFPE chains has changed the wettability of MW-CNTs, which switched their behavior from hydrophilic to super-hydrophobic. The low surface energy properties of PFPEs have been transferred to MW-CNTs surface and branched units with trifluoromethyl groups, CF₃, have conferred higher hydrophobicity than linear units. Porosimetry discriminated the effects of PFPE functionalization on meso-porosity and macro-porosity. It has been observed that reactive sites located in MW-CNTs mesopores have been intensively functionalized by branched PFPE peroxide due to its low average molecular weight. Conductivity measurements at different applied pressures have showed that the covalent linkage of PFPE chains, branched as well as linear, weakly modified the electrical conductivity of MW-CNTs. The decomposed portions of PFPE residues, the PFPE chains bonded on carbon nanotubes, and the PFPE fluids obtained by homo-coupling side-reactions were evaluated by mass balances. PFPE-modified MW-CNTs have been characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), static contact angle (SCA), surface area, and porosity measurements.
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Affiliation(s)
- Maurizio Sansotera
- Dipartimento di Chimica, Materiali e Ingegneria Chimica, Politecnico di Milano, via Mancinelli 7, I-20131 Milano, Italy.
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (UdR-PoliMi), via G. Giusti, 9, 50121 Firenze, Italy.
| | - Sadaf Talaeemashhadi
- Dipartimento di Chimica, Materiali e Ingegneria Chimica, Politecnico di Milano, via Mancinelli 7, I-20131 Milano, Italy.
| | - Cristian Gambarotti
- Dipartimento di Chimica, Materiali e Ingegneria Chimica, Politecnico di Milano, via Mancinelli 7, I-20131 Milano, Italy.
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (UdR-PoliMi), via G. Giusti, 9, 50121 Firenze, Italy.
| | - Carlo Pirola
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milano, Italy.
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (UdR-UniMi), via G. Giusti, 9, 50121 Firenze, Italy.
| | - Mariangela Longhi
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milano, Italy.
| | - Marco A Ortenzi
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milano, Italy.
| | - Walter Navarrini
- Dipartimento di Chimica, Materiali e Ingegneria Chimica, Politecnico di Milano, via Mancinelli 7, I-20131 Milano, Italy.
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (UdR-PoliMi), via G. Giusti, 9, 50121 Firenze, Italy.
| | - Claudia L Bianchi
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milano, Italy.
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (UdR-UniMi), via G. Giusti, 9, 50121 Firenze, Italy.
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Prati L, Bergna D, Villa A, Spontoni P, Bianchi CL, Hu T, Romar H, Lassi U. Carbons from second generation biomass as sustainable supports for catalytic systems. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.03.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Stucchi M, Galli F, Bianchi CL, Pirola C, Boffito DC, Biasioli F, Capucci V. Simultaneous photodegradation of VOC mixture by TiO 2 powders. Chemosphere 2018; 193:198-206. [PMID: 29131978 DOI: 10.1016/j.chemosphere.2017.11.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 10/31/2017] [Accepted: 11/01/2017] [Indexed: 06/07/2023]
Abstract
Volatile and semi volatile organic compounds' concentration have dramatically increased in indoor environments in recent years. UV light promotes titanium dioxide, which oxidises various molecules; however, most of the studies report the degradation of a single VOC. Here, we investigate the photo-oxidation of 17 molecules in mixture to have a realistic test of TiO2 efficacy. We compare P25, a nanometric catalyst, and 1077, a micrometric sample, that poses less health concerns. A proton-transfer-reaction mass spectrometer measured online the concentration of all the pollutants simultaneously. Aldehydes compete for the adsorption on both the catalyst's active sites and thus they degrade 70% and 55% with P25 and 1077 respectively. Considering the single pollutant oxidation, instead, aldehydes fully oxidize. Even though benzene is recalcitrant to degradation, P25 and 1077 reduced toluene's concentration to 97% and 96% in 55 min, respectively. Acetonitrile is refractory to photocatalysis.
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Affiliation(s)
- Marta Stucchi
- Polytechnique Montréal, Département de Génie Chimique, 2900 Edouard Montpetit Blvd, H3C 3A4 Montrèal (QC), Canada
| | - Federico Galli
- Polytechnique Montréal, Département de Génie Chimique, 2900 Edouard Montpetit Blvd, H3C 3A4 Montrèal (QC), Canada.
| | - Claudia L Bianchi
- Università di Milano, Dipartimento di Chimica, Via Golgi 19, 20133 Milano, Italy
| | - Carlo Pirola
- Università di Milano, Dipartimento di Chimica, Via Golgi 19, 20133 Milano, Italy
| | - Daria C Boffito
- Polytechnique Montréal, Département de Génie Chimique, 2900 Edouard Montpetit Blvd, H3C 3A4 Montrèal (QC), Canada
| | - Franco Biasioli
- Research & Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38010 San Michele a/A, Italy
| | - Valentino Capucci
- GranitiFiandre SpA, Via Ghiarola Nuova 119, 42014 Castellarano, Italy
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Stucchi M, Bianchi CL, Argirusis C, Pifferi V, Neppolian B, Cerrato G, Boffito DC. Ultrasound assisted synthesis of Ag-decorated TiO 2 active in visible light. Ultrason Sonochem 2018; 40:282-288. [PMID: 28946426 DOI: 10.1016/j.ultsonch.2017.07.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 07/08/2017] [Accepted: 07/08/2017] [Indexed: 05/12/2023]
Abstract
Titanium dioxide is the most popular photocatalyst to degrade organic pollutants in air, as well as in water. The principal drawback preventing its commercial application lies in its limited absorption of the visible light (400-700nm), while it is active under UV irradiation (≤387nm). Supporting noble metals in the form of nanoparticles on TiO2 increases its activity in the visible range. However, both the synthesis of noble metal nanoparticles and their deposition on TiO2 are multi-step processes that often require organic solvents. Here, we deposit Ag nanoparticles from AgNO3 on the surface of micrometric TiO2 with H2O as a solvent and under ultrasound irradiation at 30Wcm-2. Ultrasound increases the surface amount of Ag on TiO2 with heterogeneous size distribution of Ag nanoparticles, which are bigger and overlaid (1-20nm vs. 0.5-3nm) compared to the sample obtained in traditional conditions (TEM images). While this change in morphology had no effect on acetone photodegradation under UV light, the 5%, 10%, and 20% Ag-TiO2 degraded 17%, 20% and 24% acetone under visible light, respectively. The 10% by weight Ag-TiO2 sample obtained in absence of ultrasound only degraded 14% acetone in 6h, while the bare TiO2 was not active.
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Affiliation(s)
- M Stucchi
- Polytechnique Montréal, Département de Génie Chimique, 2900 Edouard Montpetit Blvd, H3C 3A4 Montrèal (QC), Canada; Università di Milano, Chemistry Department, Via Golgi 19, 20133 Milano, Italy.
| | - C L Bianchi
- Università di Milano, Chemistry Department, Via Golgi 19, 20133 Milano, Italy
| | - C Argirusis
- National Technical University of Athens, School of Chemical Engineering, Athens, Greece
| | - V Pifferi
- Università di Milano, Chemistry Department, Via Golgi 19, 20133 Milano, Italy
| | - B Neppolian
- SRM University, SRM Research Institute, Chennai, India
| | - G Cerrato
- Università di Torino & NIS Inter-departmental Centre, Torino, Italy
| | - D C Boffito
- Polytechnique Montréal, Département de Génie Chimique, 2900 Edouard Montpetit Blvd, H3C 3A4 Montrèal (QC), Canada
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Galli F, Comazzi A, Previtali D, Manenti F, Bozzano G, Bianchi CL, Pirola C. Production of oxygen-enriched air via desorption from water: Experimental data, simulations and economic assessment. Comput Chem Eng 2017. [DOI: 10.1016/j.compchemeng.2016.07.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Lahti R, Bergna D, Romar H, Hu T, Comazzi A, Pirola C, Bianchi CL, Lassi U. Characterization of Cobalt Catalysts on Biomass-Derived Carbon Supports. Top Catal 2017. [DOI: 10.1007/s11244-017-0823-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Bianchi CL, Sacchi B, Pirola C, Demartin F, Cerrato G, Morandi S, Capucci V. Aspirin and paracetamol removal using a commercial micro-sized TiO 2 catalyst in deionized and tap water. Environ Sci Pollut Res Int 2017; 24:12646-12654. [PMID: 27770326 DOI: 10.1007/s11356-016-7781-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 09/26/2016] [Indexed: 06/06/2023]
Abstract
Micro-sized TiO2 catalyst was employed to degrade pharmaceutical compounds, i.e. aspirin and paracetamol, two of the most widely used drugs, purchasable without prescription. Their active agents, acetylsalicylic acid and acetaminophen, are characterized by different substituent groups, linked to the aromatic ring, which affect both the photodegradation and mineralization processes. The experimental conditions highlight the relationship between the nature of the pristine molecules, their degradation mechanisms, their mutual interference and the water's role. The research started from model systems with a single pollutant to the mixture of them and finally by moving from deionized water to tap water.
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Affiliation(s)
- Claudia L Bianchi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy
- Consorzio INSTM, via Giusti 9, 50121, Florence, Italy
| | - Benedetta Sacchi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy.
- Consorzio INSTM, via Giusti 9, 50121, Florence, Italy.
| | - Carlo Pirola
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy
- Consorzio INSTM, via Giusti 9, 50121, Florence, Italy
| | - Francesco Demartin
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milan, Italy
| | - Giuseppina Cerrato
- Consorzio INSTM, via Giusti 9, 50121, Florence, Italy
- Dipartimento di Chimica and NIS, Inter-departmental Centre, Università degli Studi di Torino, Via Giuria 7, 10125, Torino, Italy
| | - Sara Morandi
- Consorzio INSTM, via Giusti 9, 50121, Florence, Italy
- Dipartimento di Chimica and NIS, Inter-departmental Centre, Università degli Studi di Torino, Via Giuria 7, 10125, Torino, Italy
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Marelli M, Evangelisti C, Diamanti MV, Dal Santo V, Pedeferri MP, Bianchi CL, Schiavi L, Strini A. TiO 2 Nanotubes Arrays Loaded with Ligand-Free Au Nanoparticles: Enhancement in Photocatalytic Activity. ACS Appl Mater Interfaces 2016; 8:31051-31058. [PMID: 27767304 DOI: 10.1021/acsami.6b11436] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A new protocol to synthesize size-controlled Au nanoparticles (NPs) loaded onto vertically aligned anatase TiO2 nanotubes arrays (TNTAs) prepared by electrochemical anodization is reported. Ligand-free Au NPs (<10 nm) were deposited onto anatase TNTAs supports, finely tuning the Au loading by controlling the immersion time of the support into metal vapor synthesis (MVS)-derived Au-acetone solutions. The Au/TNTAs composites were characterized by electron microscopies (SEM, (S)TEM), X-ray diffraction, X-ray photoelectron spectroscopy, and UV-vis spectroscopy. Their photocatalytic efficiency was evaluated in toluene degradation in air under ambient conditions without thermal or chemical postsynthetic treatments. The role of Au loadings was pointed out, obtaining a three times enhancement of the pristine anatase TNTAs activity with the best sample containing 3.3 μg Au cm-2.
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Affiliation(s)
- Marcello Marelli
- Istituto di Scienze e Tecnologie Molecolari (ISTM-CNR) , Via C. Golgi 19, 20133 Milano, Italy
| | - Claudio Evangelisti
- Istituto di Scienze e Tecnologie Molecolari (ISTM-CNR) , Via C. Golgi 19, 20133 Milano, Italy
| | - Maria Vittoria Diamanti
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano ,Via Mancinelli 7, 20131 Milan, Italy
| | - Vladimiro Dal Santo
- Istituto di Scienze e Tecnologie Molecolari (ISTM-CNR) , Via C. Golgi 19, 20133 Milano, Italy
| | - Maria Pia Pedeferri
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano ,Via Mancinelli 7, 20131 Milan, Italy
| | - Claudia L Bianchi
- Dipartimento di Chimica, Università di Milano , Via Golgi 19, 20133 Milano, Italy
| | - Luca Schiavi
- Istituto per le Tecnologie della Costruzione (ITC-CNR) , via Lombardia, 49, San Giuliano Milanese, I-20098 Milan, Italy
| | - Alberto Strini
- Istituto per le Tecnologie della Costruzione (ITC-CNR) , via Lombardia, 49, San Giuliano Milanese, I-20098 Milan, Italy
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Oldani V, Sergi G, Pirola C, Sacchi B, Bianchi CL. Sol-gel hybrid coatings containing silica and a perfluoropolyether derivative with high resistance and anti-fouling properties in liquid media. J Fluor Chem 2016. [DOI: 10.1016/j.jfluchem.2016.06.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Stucchi M, Bianchi CL, Pirola C, Cerrato G, Morandi S, Argirusis C, Sourkouni G, Naldoni A, Capucci V. Copper NPs decorated titania: A novel synthesis by high energy US with a study of the photocatalytic activity under visible light. Ultrason Sonochem 2016; 31:295-301. [PMID: 26964952 DOI: 10.1016/j.ultsonch.2016.01.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 12/24/2015] [Accepted: 01/14/2016] [Indexed: 05/12/2023]
Abstract
The most important drawback of the use of TiO2 as photocatalyst is its lack of activity under visible light. To overcome this problem, the surface modification of commercial micro-sized TiO2 by means of high-energy ultrasound (US), employing CuCl2 as precursor molecule to obtain both metallic copper as well as copper oxides species at the TiO2 surface, is here. We have prepared samples with different copper content, in order to evaluate its impact on the photocatalytic performances of the semiconductor, and studied in particular the photodegradation in the gas phase of some volatile organic molecules (VOCs), namely acetone and acetaldehyde. We used a LED lamp in order to have only the contribution of the visible wavelengths to the TiO2 activation (typical LED lights have no emission in the UV region). We employed several techniques (i.e., HR-TEM, XRD, FT-IR and UV-Vis) in order to characterize the prepared samples, thus evidencing different sample morphologies as a function of the various copper content, with a coherent correlation between them and the photocatalytic results. Firstly, we demonstrated the possibility to use US to modify the TiO2, even when it is commercial and micro-sized as well; secondly, by avoiding completely the UV irradiation, we confirmed that pure TiO2 is not activated by visible light. On the other hand, we showed that copper metal and metal oxides nanoparticles strongly and positively affect its photocatalytic activity.
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Affiliation(s)
- Marta Stucchi
- University of Milan, Via Golgi 19, 20133 Milan, Italy; Consorzio INSTM, Firenze, Italy.
| | - Claudia L Bianchi
- University of Milan, Via Golgi 19, 20133 Milan, Italy; Consorzio INSTM, Firenze, Italy
| | - Carlo Pirola
- University of Milan, Via Golgi 19, 20133 Milan, Italy; Consorzio INSTM, Firenze, Italy
| | - Giuseppina Cerrato
- University of Turin & NIS Inter-departmental Centre, Turin, Italy; Consorzio INSTM, Firenze, Italy
| | - Sara Morandi
- University of Turin & NIS Inter-departmental Centre, Turin, Italy; Consorzio INSTM, Firenze, Italy
| | - Christos Argirusis
- National Technical University of Athens, School of Chemical Engineering, 15780 Athens, Greece
| | - Georgia Sourkouni
- Clausthaler Zentrum für Materialtechnik, Agricola Str. 2, 38678 Clausthal-Zelelrfeld, Germany
| | - Alberto Naldoni
- CNR - Istituto di Scienze e Tecnologie Molecolari, Via C. Golgi 19, Milano 20133, Italy
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Neppolian B, Mine S, Horiuchi Y, Bianchi CL, Matsuoka M, Dionysiou DD, Anpo M. Efficient photocatalytic degradation of organics present in gas and liquid phases using Pt-TiO2/Zeolite (H-ZSM). Chemosphere 2016; 153:237-243. [PMID: 27016820 DOI: 10.1016/j.chemosphere.2016.03.063] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 02/16/2016] [Accepted: 03/14/2016] [Indexed: 06/05/2023]
Abstract
TiO2-encapsulated H-ZSM photocatalysts were prepared by physical mixing of TiO2 and zeolites. Pt was immobilized on the surface of the TiO2-encapsulated zeolite (H-ZSM) catalysts by a simple photochemical reduction method. Different weight ratios of both TiO2 and Pt were hybridized with H-ZSM and the catalytic performance of the prepared catalysts was investigated for 2-propanol oxidation in liquid phase and acetaldehyde in gas phase reaction. Around 5-10 wt% TiO2-encapsulated H-ZSM catalysts was found to be optimal amount for the effective oxidation of the organics. Prior to light irradiation, Pt-TiO2-H-ZSM showed considerable amount of catalytic degradation of 2-propanol in the dark, forming acetone as an intermediate. In this study, Pt has played a major and important role on the total oxidation of 2-propanol as well as acetaldehyde. As a result, no residual organics were present in the pores of the zeolites. The catalysts could be reused more than three times without losing their catalytic activity in both phases. The Pt-TiO2-H-ZSM photocatalysts could overcome the problem of strong adsorption of organics in the zeolite pores (after the reaction). Thus, Pt-TiO2-H-ZSM can be used as a potential catalyst for both liquid and gas phase oxidation of organic pollutants.
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Affiliation(s)
- B Neppolian
- SRM-Research Institute, SRM University, Kattankulathur, Chennai, India.
| | - Shinya Mine
- Department of Applied Chemistry, Osaka Prefecture University, Gakuen-Cho 1-1, Sakai, Osaka, 599-8531, Japan
| | - Yu Horiuchi
- Department of Applied Chemistry, Osaka Prefecture University, Gakuen-Cho 1-1, Sakai, Osaka, 599-8531, Japan
| | - C L Bianchi
- Department of Chemistry, University of Milan, Via Golgi 19, 20133 Milano, Italy.
| | - M Matsuoka
- Department of Applied Chemistry, Osaka Prefecture University, Gakuen-Cho 1-1, Sakai, Osaka, 599-8531, Japan
| | - D D Dionysiou
- Environmental Engineering and Science Program, Department of Biomedical, Chemical and Environmental Engineering, University of Cincinnati, USA
| | - M Anpo
- Department of Applied Chemistry, Osaka Prefecture University, Gakuen-Cho 1-1, Sakai, Osaka, 599-8531, Japan
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Trevisanut C, Jazayeri SM, Bonkane S, Neagoe C, Mohamadalizadeh A, Boffito DC, Bianchi CL, Pirola C, Visconti CG, Lietti L, Abatzoglou N, Frost L, Lerou J, Green W, Patience GS. Micro-syngas technology options for GtL. CAN J CHEM ENG 2016. [DOI: 10.1002/cjce.22433] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Cristian Trevisanut
- Department of Chemical Engineering; Polytechnique Montréal; C.P. 6079 Succ. CV Montréal H3C 3A7 QC Canada
| | - Seyed M. Jazayeri
- Department of Chemical Engineering; Polytechnique Montréal; C.P. 6079 Succ. CV Montréal H3C 3A7 QC Canada
| | - Said Bonkane
- Department of Chemical Engineering; Polytechnique Montréal; C.P. 6079 Succ. CV Montréal H3C 3A7 QC Canada
| | - Cristian Neagoe
- Department of Chemical Engineering; Polytechnique Montréal; C.P. 6079 Succ. CV Montréal H3C 3A7 QC Canada
| | - Ali Mohamadalizadeh
- Department of Chemical Engineering; Polytechnique Montréal; C.P. 6079 Succ. CV Montréal H3C 3A7 QC Canada
| | - Daria C. Boffito
- Department of Chemical Engineering; Polytechnique Montréal; C.P. 6079 Succ. CV Montréal H3C 3A7 QC Canada
| | - Claudia L. Bianchi
- Dipartimento di Chimica; Università degli Studi di Milano; via Golgi, 19 20133 Milano Italy
| | - Carlo Pirola
- Dipartimento di Chimica; Università degli Studi di Milano; via Golgi, 19 20133 Milano Italy
| | | | - Luca Lietti
- Dipartimento di Energia; Politecnico di Milano; Via La Masa 34 20156 Milano Italy
| | - Nicolas Abatzoglou
- Department of Chemical Engineering; University of Sherbrooke; J1K 2R1 QC Canada
| | - Lyman Frost
- Ceramatec; 2425 South 900 West Salt Lake City UT 84119 USA
| | - Jan Lerou
- Jan Lerou Consulting, LLC; 4182 Shire Cove Road Hilliard OH 43026 USA
| | - William Green
- Department of Chemical Engineering; MIT; 25 Ames St Cambridge MA 02142 USA
| | - Gregory S. Patience
- Department of Chemical Engineering; Polytechnique Montréal; C.P. 6079 Succ. CV Montréal H3C 3A7 QC Canada
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Iannaccone G, Bernardi A, Suriano R, Bianchi CL, Levi M, Turri S, Griffini G. The role of sol–gel chemistry in the low-temperature formation of ZnO buffer layers for polymer solar cells with improved performance. RSC Adv 2016. [DOI: 10.1039/c6ra03344j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Flexible polymer solar cells with improved performance are demonstrated via judicious control of sol–gel chemistry of the ZnO electron-transporting layer.
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Affiliation(s)
- Giovanni Iannaccone
- Department of Chemistry
- Materials and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- 20133 Milano
- Italy
| | - Andrea Bernardi
- ENI S.p.A
- Research Center for Renewable Energies & Environment – Istituto Donegani
- 28100 Novara
- Italy
| | - Raffaella Suriano
- Department of Chemistry
- Materials and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- 20133 Milano
- Italy
| | - Claudia L. Bianchi
- Department of Chemistry
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Marinella Levi
- Department of Chemistry
- Materials and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- 20133 Milano
- Italy
| | - Stefano Turri
- Department of Chemistry
- Materials and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- 20133 Milano
- Italy
| | - Gianmarco Griffini
- Department of Chemistry
- Materials and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- 20133 Milano
- Italy
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42
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Oldani V, del Negro R, Bianchi CL, Suriano R, Turri S, Pirola C, Sacchi B. Surface properties and anti-fouling assessment of coatings obtained from perfluoropolyethers and ceramic oxides nanopowders deposited on stainless steel. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.08.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Comazzi A, Pirola C, Bianchi CL, Galli F, Longhi M, Manenti F. High-loaded Fe-supported catalyst for the thermochemical BtL-FT process: Experimental results and modelling. CAN J CHEM ENG 2015. [DOI: 10.1002/cjce.22357] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Alberto Comazzi
- Università degli Studi di Milano; Dipartimento di Chimica; Via Golgi 19 - 20133 Milano Italy
| | - Carlo Pirola
- Università degli Studi di Milano; Dipartimento di Chimica; Via Golgi 19 - 20133 Milano Italy
| | - Claudia L. Bianchi
- Università degli Studi di Milano; Dipartimento di Chimica; Via Golgi 19 - 20133 Milano Italy
| | - Federico Galli
- Università degli Studi di Milano; Dipartimento di Chimica; Via Golgi 19 - 20133 Milano Italy
| | - Mariangela Longhi
- Università degli Studi di Milano; Dipartimento di Chimica; Via Golgi 19 - 20133 Milano Italy
| | - Flavio Manenti
- Dipartimento di Chimica; Materiali e Ingegneria Chimica “Giulio Natta,“ Piazza Leonardo da Vinci; 32 - 20133 Milano Italy
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44
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Sansotera M, Persico F, Rizzi V, Panzeri W, Pirola C, Bianchi CL, Mele A, Navarrini W. The effect of oxygen in the photocatalytic oxidation pathways of perfluorooctanoic acid. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.06.019] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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45
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Onorati M, Uboldi P, Bianchi CL, Nicola M, Corradini GM, Veronese S, Fascì AI, Di Nuovo F. Solitary thyroid metastasis from colon cancer: fine-needle aspiration cytology and molecular biology approach. Pathologica 2015; 107:192-196. [PMID: 26946875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023] Open
Abstract
Thyroid gland is one of the most vascularized organs of the body, nevertheless clinical and surgical series report an incidence of secondary malignancies in this gland of only 3%. Colorectal carcinoma metastatic to the thyroid gland is not as uncommon as previously believed, infact the number of cases seems to be increased in recent years due to the more frequent use of fine-needle aspiration cytology (FNAC) guided by ultrasonography. Although kidney, breast and lung metastases to the thyroid are frequent, metastasis from colon cancer is clinically rare with 52 cases reported in the literature in the last 5 decades and three cases described as solitary thyroid metastasis from the colon cancer without any other visceral metastases. To the best of our knowledge, we report the fourth case of solitary, asymptomatic thyroid metastasis from colon cancer without involvement of other organs. We discuss the importance of FNAC to detect metastatazing process as a compulsory step of the diagnostic and therapeutic management algorithm, combined with a molecular biology approach. A review of the last 5 decades literature, to update the number of cases described to date, is also included.
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46
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Gatto S, Sansotera M, Persico F, Gola M, Pirola C, Panzeri W, Navarrini W, Bianchi CL. Surface fluorination on TiO2 catalyst induced by photodegradation of perfluorooctanoic acid. Catal Today 2015. [DOI: 10.1016/j.cattod.2014.04.031] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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47
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Bianchi CL, Pirola C, Galli F, Stucchi M, Morandi S, Cerrato G, Capucci V. Nano and micro-TiO2 for the photodegradation of ethanol: experimental data and kinetic modelling. RSC Adv 2015. [DOI: 10.1039/c5ra05385d] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this work we show the possibility of using pigmentary TiO2-powders as photocatalysts and we develop a kinetic model which is able to follow the behavior of nano-TiO2versus micro-TiO2 in ethanol degradation.
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Affiliation(s)
- Claudia L. Bianchi
- Dip. Chimica
- Università degli Studi di Milano
- 20133 Milan
- Italy
- Consorzio INSTM
| | - Carlo Pirola
- Dip. Chimica
- Università degli Studi di Milano
- 20133 Milan
- Italy
- Consorzio INSTM
| | - Federico Galli
- Dip. Chimica
- Università degli Studi di Milano
- 20133 Milan
- Italy
- Consorzio INSTM
| | - Marta Stucchi
- Dip. Chimica
- Università degli Studi di Milano
- 20133 Milan
- Italy
- Consorzio INSTM
| | - Sara Morandi
- Università di Torino & NIS Inter-departmental Centre
- Torino
- Italy
- Consorzio INSTM
- Firenze
| | - Giuseppina Cerrato
- Università di Torino & NIS Inter-departmental Centre
- Torino
- Italy
- Consorzio INSTM
- Firenze
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48
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Villa A, Chan-Thaw CE, Campisi S, Bianchi CL, Wang D, Kotula PG, Kübel C, Prati L. AuRu/AC as an effective catalyst for hydrogenation reactions. Phys Chem Chem Phys 2015; 17:28171-6. [DOI: 10.1039/c5cp00632e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
AuRu bimetallic catalysts have been prepared by sequential deposition of Au on Ru or vice versa obtaining different nanostructures: when Ru has been deposited on Au, a Aucore–Rushell has been observed, whereas the deposition of Au on Ru leads to a bimetallic phase with Ru enrichment on the surface.
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Affiliation(s)
- Alberto Villa
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | | | - Sebastiano Campisi
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Claudia L. Bianchi
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Di Wang
- Institute of Nanotechnology and Karlsruhe Nano Micro Facility
- Karlsruhe Institute of Technology
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Paul G. Kotula
- Materials Characterization Department
- Sandia National Laboratories
- Albuquerque
- USA
| | - Christian Kübel
- Institute of Nanotechnology and Karlsruhe Nano Micro Facility
- Karlsruhe Institute of Technology
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Laura Prati
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
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49
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Pirola C, Galli F, Manenti F, Corbetta M, Bianchi CL. Simulation and Related Experimental Validation of Acetic Acid/Water Distillation Using p-Xylene as Entrainer. Ind Eng Chem Res 2014. [DOI: 10.1021/ie502758v] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carlo Pirola
- Dipartimento
di Chimica, Università degli Studi di Milano, via Golgi,
19, 20133 Milano, Italy
| | - Federico Galli
- Dipartimento
di Chimica, Università degli Studi di Milano, via Golgi,
19, 20133 Milano, Italy
- Dipartimento
CMIC “Giulio Natta”, Politecnico di Milano, piazza Leonardo
da Vinci 32, 20133 Milano, Italy
| | - Flavio Manenti
- Dipartimento
CMIC “Giulio Natta”, Politecnico di Milano, piazza Leonardo
da Vinci 32, 20133 Milano, Italy
| | - Michele Corbetta
- Dipartimento
CMIC “Giulio Natta”, Politecnico di Milano, piazza Leonardo
da Vinci 32, 20133 Milano, Italy
| | - Claudia L. Bianchi
- Dipartimento
di Chimica, Università degli Studi di Milano, via Golgi,
19, 20133 Milano, Italy
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50
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Boffito DC, Galli F, Pirola C, Bianchi CL, Patience GS. Ultrasonic free fatty acids esterification in tobacco and canola oil. Ultrason Sonochem 2014; 21:1969-75. [PMID: 24534067 DOI: 10.1016/j.ultsonch.2014.01.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 01/16/2014] [Accepted: 01/26/2014] [Indexed: 05/08/2023]
Abstract
Ultrasound accelerates the free fatty acids esterification rate by reducing the mass transfer resistance between methanol in the liquid phase and absorbed organic species on Amberlyst®46 catalyst. The reaction rates of canola oil is three times greater than for tobacco seed oil but half the reaction rate of pure oleic acid as measured in a batch reactor. The beneficial effects of ultrasound vs. the conventional approach are more pronounced at lower temperatures (20°C and 40°C vs. 63°C): at 20°C, the free fatty acids conversion reaches 68% vs. 23% with conventional mechanical stirring. The increased conversion is attributed to acoustic cavitation that increases mass transfer in the vicinity of the active sites. The Eley-Rideal kinetic model in which the concentration of the reacting species is expressed taking into account the mass transfer between the phases is in excellent agreement with the experimental data. Ultrasound increases the mass transfer coefficient in the tobacco oil 6 and 4.1 fold at 20°C and 40°C, respectively.
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Affiliation(s)
- D C Boffito
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy.
| | - F Galli
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy
| | - C Pirola
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy
| | - C L Bianchi
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy
| | - G S Patience
- Polytechnique Montréal, Departement de Génie Chimique, 2900 Édouard-Montpetit, 2500 Chemin Polytechnique, H3T 1J4 Montreal, Canada
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