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Kumarage GWC, Panamaldeniya SA, Maddumage DC, Moumen A, Maraloiu VA, Mihalcea CG, Negrea RF, Dassanayake BS, Gunawardhana N, Zappa D, Galstyan V, Comini E. Synthesis of TiO 2-(B) Nanobelts for Acetone Sensing. Sensors (Basel) 2023; 23:8322. [PMID: 37837151 PMCID: PMC10575087 DOI: 10.3390/s23198322] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 10/04/2023] [Accepted: 10/04/2023] [Indexed: 10/15/2023]
Abstract
Titanium dioxide nanobelts were prepared via the alkali-hydrothermal method for application in chemical gas sensing. The formation process of TiO2-(B) nanobelts and their sensing properties were investigated in detail. FE-SEM was used to study the surface of the obtained structures. The TEM and XRD analyses show that the prepared TiO2 nanobelts are in the monoclinic phase. Furthermore, TEM shows the formation of porous-like morphology due to crystal defects in the TiO2-(B) nanobelts. The gas-sensing performance of the structure toward various concentrations of hydrogen, ethanol, acetone, nitrogen dioxide, and methane gases was studied at a temperature range between 100 and 500 °C. The fabricated sensor shows a high response toward acetone at a relatively low working temperature (150 °C), which is important for the development of low-power-consumption functional devices. Moreover, the obtained results indicate that monoclinic TiO2-B is a promising material for applications in chemo-resistive gas detectors.
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Affiliation(s)
- Gayan W. C. Kumarage
- SENSOR Lab, Department of Information Engineering, University of Brescia, 25133 Brescia, Italy or (G.W.C.K.)
- Department of Physics and Electronics, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri Lanka
| | - Shasika A. Panamaldeniya
- Postgraduate Institute of Science, University of Peradeniya, Peradeniya 20400, Sri Lanka
- Department of Physics, Faculty of Science, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Dileepa C. Maddumage
- Postgraduate Institute of Science, University of Peradeniya, Peradeniya 20400, Sri Lanka
- Department of Physics, Faculty of Science, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Abderrahim Moumen
- SENSOR Lab, Department of Information Engineering, University of Brescia, 25133 Brescia, Italy or (G.W.C.K.)
| | - Valentin A. Maraloiu
- Laboratory of Atomic Structures and Defects in Advanced Materials, National Institute of Materials Physics, Atomistilor str. 405 A, 077125 Magurele, Romania; (V.A.M.)
| | - Catalina G. Mihalcea
- Laboratory of Atomic Structures and Defects in Advanced Materials, National Institute of Materials Physics, Atomistilor str. 405 A, 077125 Magurele, Romania; (V.A.M.)
| | - Raluca F. Negrea
- Laboratory of Atomic Structures and Defects in Advanced Materials, National Institute of Materials Physics, Atomistilor str. 405 A, 077125 Magurele, Romania; (V.A.M.)
| | - Buddhika S. Dassanayake
- Department of Physics, Faculty of Science, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Nanda Gunawardhana
- Research and International Affairs, Sri Lanka Technological Campus, Padukka 10500, Sri Lanka
| | - Dario Zappa
- SENSOR Lab, Department of Information Engineering, University of Brescia, 25133 Brescia, Italy or (G.W.C.K.)
| | - Vardan Galstyan
- SENSOR Lab, Department of Information Engineering, University of Brescia, 25133 Brescia, Italy or (G.W.C.K.)
| | - Elisabetta Comini
- SENSOR Lab, Department of Information Engineering, University of Brescia, 25133 Brescia, Italy or (G.W.C.K.)
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Kumarage GWC, Hakkoum H, Comini E. Recent Advancements in TiO 2 Nanostructures: Sustainable Synthesis and Gas Sensing. Nanomaterials (Basel) 2023; 13:1424. [PMID: 37111009 PMCID: PMC10147078 DOI: 10.3390/nano13081424] [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] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/11/2023] [Accepted: 04/17/2023] [Indexed: 06/19/2023]
Abstract
The search for sustainable technology-driven advancements in material synthesis is a new norm, which ensures a low impact on the environment, production cost, and workers' health. In this context, non-toxic, non-hazardous, and low-cost materials and their synthesis methods are integrated to compete with existing physical and chemical methods. From this perspective, titanium oxide (TiO2) is one of the fascinating materials because of its non-toxicity, biocompatibility, and potential of growing by sustainable methods. Accordingly, TiO2 is extensively used in gas-sensing devices. Yet, many TiO2 nanostructures are still synthesized with a lack of mindfulness of environmental impact and sustainable methods, which results in a serious burden on practical commercialization. This review provides a general outline of the advantages and disadvantages of conventional and sustainable methods of TiO2 preparation. Additionally, a detailed discussion on sustainable growth methods for green synthesis is included. Furthermore, gas-sensing applications and approaches to improve the key functionality of sensors, including response time, recovery time, repeatability, and stability, are discussed in detail in the latter parts of the review. At the end, a concluding discussion is included to provide guidelines for the selection of sustainable synthesis methods and techniques to improve the gas-sensing properties of TiO2.
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