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Electrospun metal and metal alloy decorated TiO(2) nanofiber photocatalysts for hydrogen generation
Photocatalytic nanofibers of TiO(2) decorated with 2% metal (Pt, Pd, and Cu) and metal alloys (Pt(2)Pd and PtCu) were synthesized by the polymer-assisted electrospinning method, followed by microwave-assisted ethylene glycol reduction. Structurally, nanofibers calcined at 500 °C adopted an anatase p...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9086326/ https://www.ncbi.nlm.nih.gov/pubmed/35547708 http://dx.doi.org/10.1039/c8ra04148b |
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author | Ligon, Courtney Latimer, Kaniece Hood, Zachary D. Pitigala, Sanuja Gilroy, Kyle D. Senevirathne, Keerthi |
author_facet | Ligon, Courtney Latimer, Kaniece Hood, Zachary D. Pitigala, Sanuja Gilroy, Kyle D. Senevirathne, Keerthi |
author_sort | Ligon, Courtney |
collection | PubMed |
description | Photocatalytic nanofibers of TiO(2) decorated with 2% metal (Pt, Pd, and Cu) and metal alloys (Pt(2)Pd and PtCu) were synthesized by the polymer-assisted electrospinning method, followed by microwave-assisted ethylene glycol reduction. Structurally, nanofibers calcined at 500 °C adopted an anatase phase along with a remnant rutile phase. Morphological, structural, and photocatalytic studies were carried out using scanning and transmission electron microscopy equipped with an energy dispersive spectroscopy attachment, X-ray powder diffraction, X-ray photoelectron spectroscopy, and photocatalytic hydrogen generation under UV-Vis irradiation. The calcined nanofibers were found to have a diameter of 60.0 ± 5.0 nm and length of up to several microns. High resolution TEM imaging suggests that the nanofibers are composed of agglomerated individual TiO(2) nanoparticles, which are tightly packed and stacked along the axial direction of the nanofibers. PXRD studies suggest alloy formation, as evident from peak shifting towards higher two-theta values. Surface modification with co-catalysts is shown to contribute considerably to the rate of photocatalytic H(2) generation. The amount of H(2) generated gradually increases as a function of time. The 2%Pt(2)Pd/TiO(2) catalyst shows the highest rate of H(2) generation (4 mmol h(−1) gram(catalyst)), even higher than that of 2%Pt/TiO(2) nanofiber photocatalyst (2.3 mmol h(−1) gram(catalyst)), while 2%Cu/TiO(2) nanofiber photocatalyst shows the least activity among the decorated catalysts (0.04 mmol h(−1) gram(catalyst)). |
format | Online Article Text |
id | pubmed-9086326 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90863262022-05-10 Electrospun metal and metal alloy decorated TiO(2) nanofiber photocatalysts for hydrogen generation Ligon, Courtney Latimer, Kaniece Hood, Zachary D. Pitigala, Sanuja Gilroy, Kyle D. Senevirathne, Keerthi RSC Adv Chemistry Photocatalytic nanofibers of TiO(2) decorated with 2% metal (Pt, Pd, and Cu) and metal alloys (Pt(2)Pd and PtCu) were synthesized by the polymer-assisted electrospinning method, followed by microwave-assisted ethylene glycol reduction. Structurally, nanofibers calcined at 500 °C adopted an anatase phase along with a remnant rutile phase. Morphological, structural, and photocatalytic studies were carried out using scanning and transmission electron microscopy equipped with an energy dispersive spectroscopy attachment, X-ray powder diffraction, X-ray photoelectron spectroscopy, and photocatalytic hydrogen generation under UV-Vis irradiation. The calcined nanofibers were found to have a diameter of 60.0 ± 5.0 nm and length of up to several microns. High resolution TEM imaging suggests that the nanofibers are composed of agglomerated individual TiO(2) nanoparticles, which are tightly packed and stacked along the axial direction of the nanofibers. PXRD studies suggest alloy formation, as evident from peak shifting towards higher two-theta values. Surface modification with co-catalysts is shown to contribute considerably to the rate of photocatalytic H(2) generation. The amount of H(2) generated gradually increases as a function of time. The 2%Pt(2)Pd/TiO(2) catalyst shows the highest rate of H(2) generation (4 mmol h(−1) gram(catalyst)), even higher than that of 2%Pt/TiO(2) nanofiber photocatalyst (2.3 mmol h(−1) gram(catalyst)), while 2%Cu/TiO(2) nanofiber photocatalyst shows the least activity among the decorated catalysts (0.04 mmol h(−1) gram(catalyst)). The Royal Society of Chemistry 2018-09-24 /pmc/articles/PMC9086326/ /pubmed/35547708 http://dx.doi.org/10.1039/c8ra04148b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Ligon, Courtney Latimer, Kaniece Hood, Zachary D. Pitigala, Sanuja Gilroy, Kyle D. Senevirathne, Keerthi Electrospun metal and metal alloy decorated TiO(2) nanofiber photocatalysts for hydrogen generation |
title | Electrospun metal and metal alloy decorated TiO(2) nanofiber photocatalysts for hydrogen generation |
title_full | Electrospun metal and metal alloy decorated TiO(2) nanofiber photocatalysts for hydrogen generation |
title_fullStr | Electrospun metal and metal alloy decorated TiO(2) nanofiber photocatalysts for hydrogen generation |
title_full_unstemmed | Electrospun metal and metal alloy decorated TiO(2) nanofiber photocatalysts for hydrogen generation |
title_short | Electrospun metal and metal alloy decorated TiO(2) nanofiber photocatalysts for hydrogen generation |
title_sort | electrospun metal and metal alloy decorated tio(2) nanofiber photocatalysts for hydrogen generation |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9086326/ https://www.ncbi.nlm.nih.gov/pubmed/35547708 http://dx.doi.org/10.1039/c8ra04148b |
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