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Ema T, Choi PG, Takami S, Masuda Y. Facet-Controlled Synthesis of CeO 2 Nanoparticles for High-Performance CeO 2 Nanoparticle/SnO 2 Nanosheet Hybrid Gas Sensors. ACS APPLIED MATERIALS & INTERFACES 2022; 14:56998-57007. [PMID: 36521877 PMCID: PMC9802217 DOI: 10.1021/acsami.2c17444] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
CeO2 nanocubes with metastable {100} facets and CeO2 nanooctahedrons with the most stable {111} facets are herein fabricated by controlling the morphology and facets of CeO2 nanoparticles. SnO2 nanosheet-based assembled films coated with these CeO2 nanocubes or CeO2 nanooctahedrons yield {100} CeO2 nanocubes/SnO2 nanosheets and {111} CeO2 nanooctahedron/SnO2 nanosheet hybrid gas sensors, respectively. The hybrid sensors with CeO2 nanoparticles exhibited enhanced sensing responses to numerous chemical species relative to a pristine SnO2 nanosheet gas sensor, including acetone, hydrogen, ethanol, ammonia, acetaldehyde, and allyl mercaptan. In particular, the responses of {100} CeO2 nanocubes/SnO2 nanosheets and {111} CeO2 nanooctahedron/SnO2 nanosheet gas sensors to acetone or allyl mercaptan were 6.8 and 10.3 times higher, respectively, than that of the pristine SnO2 nanosheet gas sensor. Furthermore, the sensor response to ammonia was 2.5 times higher than that of a commercial volatile organic compound (VOC) gas sensor (TGS2602, Figaro Engineering Inc.). The CeO2 nanocube-based sensor with exposed metastable {100} facets promotes the adsorption and oxidation of VOCs owing to the higher surface energy of the metastable {100} facets and therefore exhibits a higher sensing performance than the CeO2 nanooctahedron-based sensor with an exposed {111} facet. The developed sensors show excellent potential for the detection of gas markers in human breath and perspiration for disease diagnosis.
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Affiliation(s)
- Takuma Ema
- Graduate
School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
- National
Institute of Advanced Industrial Science and Technology (AIST), 4-205 Sakurazaka, Moriyama, Nagoya 463-8560, Japan
| | - Pil Gyu Choi
- National
Institute of Advanced Industrial Science and Technology (AIST), 4-205 Sakurazaka, Moriyama, Nagoya 463-8560, Japan
| | - Seiichi Takami
- Graduate
School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Yoshitake Masuda
- Graduate
School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
- National
Institute of Advanced Industrial Science and Technology (AIST), 4-205 Sakurazaka, Moriyama, Nagoya 463-8560, Japan
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Facet controlled growth mechanism of SnO 2 (101) nanosheet assembled film via cold crystallization. Sci Rep 2021; 11:11304. [PMID: 34050258 PMCID: PMC8163760 DOI: 10.1038/s41598-021-90939-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 05/19/2021] [Indexed: 11/26/2022] Open
Abstract
Cold crystallization of SnO2 was realized in aqueous solutions, where crystal growth was controlled to form SnO2 (101) nanosheet assembled films for devices such as chemical sensors. The nanosheets grew directly on a fluorine-doped tin oxide substrate without a seed layer or a buffer layer. The nanosheets had a thickness of 5–10 nm and an in-plane size of 100–1600 nm. Moreover, the large flat surface of the (101) facet was metastable. The thickness of the SnO2 (101) nanosheet assembled film was approximately 800 nm, and the film had a gradient structure that contained many connected nanosheets. TEM results revealed that the predominate branch angles between any two connected nanosheets were 90° and 46.48°, corresponding to type I and type II connections, respectively. These connections were consistent with the calculations based on crystallography. Crystallographic analysis clarified the characteristic crystal growth of the SnO2 (101) nanosheet assembled film in the aqueous solution. Furthermore, we demonstrate that the metastable (101) facet can be exploited to control the rate of crystal growth by adjusting the etching condition.
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Choi PG, Izu N, Shirahata N, Masuda Y. Fabrication and H 2-Sensing Properties of SnO 2 Nanosheet Gas Sensors. ACS OMEGA 2018; 3:14592-14596. [PMID: 31458143 PMCID: PMC6644097 DOI: 10.1021/acsomega.8b01635] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 10/18/2018] [Indexed: 06/10/2023]
Abstract
Vertically formed and well-defined SnO2 nanosheets are easy to fabricate, involving only a single process that is performed under moderate conditions. In this study, two different sizes of a SnO2 nanosheet were concurrently formed on a Pt interdigitated electrode chip, with interconnections between the two. As the SnO2 nanosheets were grown over time, the interconnections became stronger. The ability of the fabricated SnO2 nanosheets to sense H2 gas was evaluated in terms of the variation in their resistance. The resistance of a SnO2 nanosheet decreased with the introduction of H2 gas and returned to its initial level after the H2 gas was replaced with air. Also, the response-recovery behaviors were improved as a result of the growth of the SnO2 nanosheets owing to the presence of many reaction sites and strong interconnections, which may provide multipassages for the electron transfer channel, leading to the acceleration of the reaction between the H2 gas and SnO2 nanosheets.
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Affiliation(s)
- Pil Gyu Choi
- National
Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
| | - Noriya Izu
- National
Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
| | - Naoto Shirahata
- International
Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1, Namiki, Tsukuba 305-0044, Japan
- Department
of Physics, Chuo University, 1-13-27 Kasuga,
Bunkyo, Tokyo 112-8551, Japan
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0814, Japan
| | - Yoshitake Masuda
- National
Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
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Liu K, Cao M, Fujishima A, Jiang L. Bio-Inspired Titanium Dioxide Materials with Special Wettability and Their Applications. Chem Rev 2014; 114:10044-94. [DOI: 10.1021/cr4006796] [Citation(s) in RCA: 427] [Impact Index Per Article: 42.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Kesong Liu
- Key
Laboratory of Bio-Inspired Smart Interfacial Science and Technology
of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, PR China
- Institute
for Superconducting and Electronic Materials, University of Wollongong, Innovation Campus, Squires Way, North Wollongong, NSW 2500, Australia
| | - Moyuan Cao
- Key
Laboratory of Bio-Inspired Smart Interfacial Science and Technology
of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, PR China
| | - Akira Fujishima
- Research
Institute for Science and Technology, Photocatalysis International
Research Center, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Lei Jiang
- Key
Laboratory of Bio-Inspired Smart Interfacial Science and Technology
of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, PR China
- Beijing
National Laboratory for Molecular Sciences (BNLMS), Key Laboratory
of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
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Masuda Y, Ohji T, Kato K. Aqueous phase deposition of dense tin oxide films with nano-structured surfaces. J SOLID STATE CHEM 2014. [DOI: 10.1016/j.jssc.2013.10.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Masuda Y, Ohji T, Kato K. Water bathing synthesis of high-surface-area nanocrystal-assembled SnO2 particles. J SOLID STATE CHEM 2012. [DOI: 10.1016/j.jssc.2011.11.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Xing J, Fang WQ, Li Z, Yang HG. TiO2-Coated Ultrathin SnO2 Nanosheets Used as Photoanodes for Dye-Sensitized Solar Cells with High Efficiency. Ind Eng Chem Res 2012. [DOI: 10.1021/ie2030823] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jun Xing
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, People's Republic of China
| | - Wen Qi Fang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, People's Republic of China
| | - Zhen Li
- ARC Centre of Excellence for Functional
Nanomaterials, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Queensland 4072, Australia
| | - Hua Gui Yang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, People's Republic of China
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Masuda Y, Ohji T, Kato K. Tin oxide nanosheet assembly for hydrophobic/hydrophilic coating and cancer sensing. ACS APPLIED MATERIALS & INTERFACES 2012; 4:1666-1674. [PMID: 22321153 DOI: 10.1021/am201811x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Tin oxide nanosheets were crystallized on transparent conductive oxide substrates of fluorine-doped tin oxide in aqueous solutions. The nanosheets had chemical ratio of Sn:O:F = 1:1.85:0.076, suggesting fluorine doping into SnO(2). They were hydrophobic surfaces with contact angle of 140°. They were converted to hydrophilic surfaces with contact angle of below 1° by light irradiation. The simple water process will be applied to surface coating of polymers, metals, biomaterials, papers, etc. Furthermore, the tin oxide nanosheets were modified with dye-labeled monoclonal antibody. Monoclonal antibody reacts with human alpha-fetoprotein in blood serum of hepatocellular cancer patient. Photoluminescence and photocurrent were obtained from the nanosheets under excitation light. Photoelectric conversion was an essence in the sensing system. The tin oxide nanosheets with dye-labeled prostate specific antigen will be used for electrodes of prostate cancer sensors.
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Affiliation(s)
- Yoshitake Masuda
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Nagoya 463-8560, Japan.
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