Molybdenum Oxide Nanoparticle Aggregates Grown by Chemical Vapor Transport
In this study, the advanced chemical vapor transport (CVT) method in combination with the quenching effect is introduced for creating molybdenum oxide nanoparticle arrays, composed of the hierarchical structure of fine nanoparticles (NPs), which are vertically grown with a homogeneous coverage on th...
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MDPI AG
2022-03-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/6/2182 |
| _version_ | 1797445615856123904 |
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| author | Yun-Hyuk Choi |
| author_facet | Yun-Hyuk Choi |
| author_sort | Yun-Hyuk Choi |
| collection | DOAJ |
| description | In this study, the advanced chemical vapor transport (CVT) method in combination with the quenching effect is introduced for creating molybdenum oxide nanoparticle arrays, composed of the hierarchical structure of fine nanoparticles (NPs), which are vertically grown with a homogeneous coverage on the individual carbon fibers of carbon fiber paper (CFP) substrates. The obtained molybdenum oxide NPs hold a metastable high-temperature γ-Mo<sub>4</sub>O<sub>11</sub> phase along with a stable α-MoO<sub>3</sub> phase by the quenching effect. Furthermore, such a quenching effect forms thinner and smaller nanoparticle aggregates by suppressing the growth and coalescence of primary particles. The molybdenum oxide nanoparticle aggregates are prepared using two different types of precursors: MoO<sub>3</sub> and a 1:1 (mol/mol) mixture of MoO<sub>3</sub> and activated carbon. The results characterized using X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy show that the relative amount of α-MoO<sub>3</sub> to γ-Mo<sub>4</sub>O<sub>11</sub> within the prepared NPs is dependent on the precursor type; a lower amount of α-MoO<sub>3</sub> to γ-Mo<sub>4</sub>O<sub>11</sub> is obtained in the NPs prepared using the mixed precursor of MoO<sub>3</sub> and carbon. This processing–structure landscape study can serve as the groundwork for the development of high-performance nanomaterials in various electronic and catalytic applications. |
| first_indexed | 2024-03-09T13:28:25Z |
| format | Article |
| id | doaj.art-a12e011df299434ba6ef21257d9e89aa |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T13:28:25Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-a12e011df299434ba6ef21257d9e89aa2023-11-30T21:20:49ZengMDPI AGMaterials1996-19442022-03-01156218210.3390/ma15062182Molybdenum Oxide Nanoparticle Aggregates Grown by Chemical Vapor TransportYun-Hyuk Choi0School of Advanced Materials and Chemical Engineering, Daegu Catholic University, Gyeongsan 38430, KoreaIn this study, the advanced chemical vapor transport (CVT) method in combination with the quenching effect is introduced for creating molybdenum oxide nanoparticle arrays, composed of the hierarchical structure of fine nanoparticles (NPs), which are vertically grown with a homogeneous coverage on the individual carbon fibers of carbon fiber paper (CFP) substrates. The obtained molybdenum oxide NPs hold a metastable high-temperature γ-Mo<sub>4</sub>O<sub>11</sub> phase along with a stable α-MoO<sub>3</sub> phase by the quenching effect. Furthermore, such a quenching effect forms thinner and smaller nanoparticle aggregates by suppressing the growth and coalescence of primary particles. The molybdenum oxide nanoparticle aggregates are prepared using two different types of precursors: MoO<sub>3</sub> and a 1:1 (mol/mol) mixture of MoO<sub>3</sub> and activated carbon. The results characterized using X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy show that the relative amount of α-MoO<sub>3</sub> to γ-Mo<sub>4</sub>O<sub>11</sub> within the prepared NPs is dependent on the precursor type; a lower amount of α-MoO<sub>3</sub> to γ-Mo<sub>4</sub>O<sub>11</sub> is obtained in the NPs prepared using the mixed precursor of MoO<sub>3</sub> and carbon. This processing–structure landscape study can serve as the groundwork for the development of high-performance nanomaterials in various electronic and catalytic applications.https://www.mdpi.com/1996-1944/15/6/2182α-MoO<sub>3</sub>γ-Mo<sub>4</sub>O<sub>11</sub>nanoparticlescarbon fiber paperchemical vapor transport |
| spellingShingle | Yun-Hyuk Choi Molybdenum Oxide Nanoparticle Aggregates Grown by Chemical Vapor Transport Materials α-MoO<sub>3</sub> γ-Mo<sub>4</sub>O<sub>11</sub> nanoparticles carbon fiber paper chemical vapor transport |
| title | Molybdenum Oxide Nanoparticle Aggregates Grown by Chemical Vapor Transport |
| title_full | Molybdenum Oxide Nanoparticle Aggregates Grown by Chemical Vapor Transport |
| title_fullStr | Molybdenum Oxide Nanoparticle Aggregates Grown by Chemical Vapor Transport |
| title_full_unstemmed | Molybdenum Oxide Nanoparticle Aggregates Grown by Chemical Vapor Transport |
| title_short | Molybdenum Oxide Nanoparticle Aggregates Grown by Chemical Vapor Transport |
| title_sort | molybdenum oxide nanoparticle aggregates grown by chemical vapor transport |
| topic | α-MoO<sub>3</sub> γ-Mo<sub>4</sub>O<sub>11</sub> nanoparticles carbon fiber paper chemical vapor transport |
| url | https://www.mdpi.com/1996-1944/15/6/2182 |
| work_keys_str_mv | AT yunhyukchoi molybdenumoxidenanoparticleaggregatesgrownbychemicalvaportransport |