Surface Properties of 1DTiO<sub>2</sub> Microrods Modified with Copper (Cu) and Nanocavities
This work deals with Cu-modified 1DTiO<sub>2</sub> microrods (MRs) and their surface properties. The pristine lyophilized precursor Cu_1DTiO<sub>2</sub>, prepared by an environmentally friendly cryo-lyophilization method, was further annealed in the temperature interval from...
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| Format: | Article |
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MDPI AG
2021-01-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/2/324 |
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| author | Snejana Bakardjieva Filip Mamon Zdenek Pinc Radek Fajgar Ivo Jakubec Natalija Murafa Eva Koci Tatjana Brovdyova Adriana Lancok Stefan Michna Rositsa Nikolova |
| author_facet | Snejana Bakardjieva Filip Mamon Zdenek Pinc Radek Fajgar Ivo Jakubec Natalija Murafa Eva Koci Tatjana Brovdyova Adriana Lancok Stefan Michna Rositsa Nikolova |
| author_sort | Snejana Bakardjieva |
| collection | DOAJ |
| description | This work deals with Cu-modified 1DTiO<sub>2</sub> microrods (MRs) and their surface properties. The pristine lyophilized precursor Cu_1DTiO<sub>2</sub>, prepared by an environmentally friendly cryo-lyophilization method, was further annealed in the temperature interval from 500 to 950 °C. The microstructure of all samples was characterized by electron microscopy (SEM/EDS and HRTEM/SAED), X-ray powder diffraction (XRD), infrared spectroscopy, simultaneous DTA/TGA thermoanalytical measurement, and mass spectroscopy (MS). Special attention was paid to the surface structure and porosity. The 1D morphology of all annealed samples was preserved, but their surface roughness varied due to anatase-rutile phase transformation and the change of the nanocrystals habits due to nanocavities formation after releasing of confined ice-water. The introduction of 2 wt.% Cu as electronically active second species significantly reduced the direct bandgap of 1DTiO<sub>2</sub> in comparison with undoped TiO<sub>2</sub> and the standard Degussa TiO<sub>2</sub>_P25. All samples were tested for their UV absorption properties and H<sub>2</sub> generation by PEC water splitting. We presented a detailed study on the surface characteristics of Cu doped 1DTiO<sub>2</sub> MRs due to gain a better idea of their photocatalytic activity. |
| first_indexed | 2024-03-09T03:32:58Z |
| format | Article |
| id | doaj.art-e4abe4306f244611ab68c176c1437016 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T03:32:58Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-e4abe4306f244611ab68c176c14370162023-12-03T14:53:15ZengMDPI AGNanomaterials2079-49912021-01-0111232410.3390/nano11020324Surface Properties of 1DTiO<sub>2</sub> Microrods Modified with Copper (Cu) and NanocavitiesSnejana Bakardjieva0Filip Mamon1Zdenek Pinc2Radek Fajgar3Ivo Jakubec4Natalija Murafa5Eva Koci6Tatjana Brovdyova7Adriana Lancok8Stefan Michna9Rositsa Nikolova10Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Rez, Czech RepublicInstitute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Rez, Czech RepublicFaculty of Mechanical Engineering, JE Purkyně University, Pasteurova 1, 400 96 Ústí nad Labem, Czech RepublicInstitute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojova 1/135, 165 02 Prague, Czech RepublicInstitute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Rez, Czech RepublicInstitute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Rez, Czech RepublicInstitute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Rez, Czech RepublicFaculty of Mechanical Engineering, JE Purkyně University, Pasteurova 1, 400 96 Ústí nad Labem, Czech RepublicInstitute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 21 Prague, Czech RepublicFaculty of Mechanical Engineering, JE Purkyně University, Pasteurova 1, 400 96 Ústí nad Labem, Czech RepublicInstitute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. Bonchev 107, 1113 Sofia, BulgariaThis work deals with Cu-modified 1DTiO<sub>2</sub> microrods (MRs) and their surface properties. The pristine lyophilized precursor Cu_1DTiO<sub>2</sub>, prepared by an environmentally friendly cryo-lyophilization method, was further annealed in the temperature interval from 500 to 950 °C. The microstructure of all samples was characterized by electron microscopy (SEM/EDS and HRTEM/SAED), X-ray powder diffraction (XRD), infrared spectroscopy, simultaneous DTA/TGA thermoanalytical measurement, and mass spectroscopy (MS). Special attention was paid to the surface structure and porosity. The 1D morphology of all annealed samples was preserved, but their surface roughness varied due to anatase-rutile phase transformation and the change of the nanocrystals habits due to nanocavities formation after releasing of confined ice-water. The introduction of 2 wt.% Cu as electronically active second species significantly reduced the direct bandgap of 1DTiO<sub>2</sub> in comparison with undoped TiO<sub>2</sub> and the standard Degussa TiO<sub>2</sub>_P25. All samples were tested for their UV absorption properties and H<sub>2</sub> generation by PEC water splitting. We presented a detailed study on the surface characteristics of Cu doped 1DTiO<sub>2</sub> MRs due to gain a better idea of their photocatalytic activity.https://www.mdpi.com/2079-4991/11/2/324titanium dioxidemicrorodslyophilizationCu dopingsurface structure |
| spellingShingle | Snejana Bakardjieva Filip Mamon Zdenek Pinc Radek Fajgar Ivo Jakubec Natalija Murafa Eva Koci Tatjana Brovdyova Adriana Lancok Stefan Michna Rositsa Nikolova Surface Properties of 1DTiO<sub>2</sub> Microrods Modified with Copper (Cu) and Nanocavities Nanomaterials titanium dioxide microrods lyophilization Cu doping surface structure |
| title | Surface Properties of 1DTiO<sub>2</sub> Microrods Modified with Copper (Cu) and Nanocavities |
| title_full | Surface Properties of 1DTiO<sub>2</sub> Microrods Modified with Copper (Cu) and Nanocavities |
| title_fullStr | Surface Properties of 1DTiO<sub>2</sub> Microrods Modified with Copper (Cu) and Nanocavities |
| title_full_unstemmed | Surface Properties of 1DTiO<sub>2</sub> Microrods Modified with Copper (Cu) and Nanocavities |
| title_short | Surface Properties of 1DTiO<sub>2</sub> Microrods Modified with Copper (Cu) and Nanocavities |
| title_sort | surface properties of 1dtio sub 2 sub microrods modified with copper cu and nanocavities |
| topic | titanium dioxide microrods lyophilization Cu doping surface structure |
| url | https://www.mdpi.com/2079-4991/11/2/324 |
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