1
|
Bragaggia G, Cacciatore A, Poffe E, Capone C, Zorzi F, Causin V, Gross S. Systematic Exploration of the Synthetic Parameters for the Production of Dynamic VO 2(M1). Molecules 2021; 26:molecules26154513. [PMID: 34361666 PMCID: PMC8348029 DOI: 10.3390/molecules26154513] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 07/15/2021] [Accepted: 07/22/2021] [Indexed: 11/16/2022] Open
Abstract
Thermochromic dynamic cool materials present a reversible change of their properties wherein by increasing the temperature, the reflectance, conductivity, and transmittance change due to a reversible crystalline phase transition. In particular, vanadium (IV) dioxide shows a reversible phase transition, accompanied by a change in optical properties, from monoclinic VO2(M1) to tetragonal VO2(R). In this paper, we report on a systematic exploration of the parameters for the synthesis of vanadium dioxide VO2(M1) via an easy, sustainable, reproducible, fast, scalable, and low-cost hydrothermal route without hazardous chemicals, followed by an annealing treatment. The metastable phase VO2(B), obtained via a hydrothermal route, was converted into the stable VO2(M1), which shows a metal–insulator transition (MIT) at 68 °C that is useful for different applications, from energy-efficient smart windows to dynamic concrete. Within this scenario, a further functionalization of the oxide nanostructures with tetraethyl orthosilicate (TEOS), characterized by an extreme alkaline environment, was carried out to ensure compatibility with the concrete matrix. Structural properties of the synthesized vanadium dioxides were investigated using temperature-dependent X-ray Diffraction analysis (XRD), while compositional and morphological properties were assessed using Scanning Electron Microscopy, Energy Dispersive X-ray Analysis (SEM-EDX), and Transmission Electron Microscopy (TEM). Differential Scanning Calorimetry (DSC) analysis was used to investigate the thermal behavior.
Collapse
Affiliation(s)
- Giulia Bragaggia
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy; (G.B.); (A.C.); (E.P.); (V.C.)
- INSTM, Consorzio Interuniversitario per la Scienza e Tecnologia dei Materiali, Via Giusti 9, 50121 Firenze, Italy
| | - Andrea Cacciatore
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy; (G.B.); (A.C.); (E.P.); (V.C.)
- Italcementi S.p.A., HeidelbergCement Group, Via Stezzano 87, 24126 Bergamo, Italy;
| | - Elisa Poffe
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy; (G.B.); (A.C.); (E.P.); (V.C.)
- INSTM, Consorzio Interuniversitario per la Scienza e Tecnologia dei Materiali, Via Giusti 9, 50121 Firenze, Italy
| | - Claudia Capone
- Italcementi S.p.A., HeidelbergCement Group, Via Stezzano 87, 24126 Bergamo, Italy;
| | - Federico Zorzi
- CEASC, Centro di Analisi e Servizi per la Certificazione, Via Jappelli 1/A, 35131 Padova, Italy;
- Dipartimento di Geoscienze, Università degli Studi di Padova, Via Gradenigo 6, 35131 Padova, Italy
| | - Valerio Causin
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy; (G.B.); (A.C.); (E.P.); (V.C.)
| | - Silvia Gross
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131 Padova, Italy; (G.B.); (A.C.); (E.P.); (V.C.)
- INSTM, Consorzio Interuniversitario per la Scienza e Tecnologia dei Materiali, Via Giusti 9, 50121 Firenze, Italy
- Correspondence:
| |
Collapse
|