Szczegóły publikacji
Opis bibliograficzny
Photocatalytic and gas sensitive multiwalled carbon nanotube/$TiO_2-ZnO$ and $ZnO-TiO_2$ composites prepared by atomic layer deposition / László Péter Bakos, [et al.], Paweł PASIERB, [et al.] // Nanomaterials [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 2079-4991. — 2020 — vol. 10 iss. 2 art. no. 252, s. 1–14. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 12–14, Abstr. — Publikacja dostępna online od: 2020-01-31
Autorzy (12)
- Bakos László
- Justh Nóra
- da Silva Bezerra Ulisses Carlo Moura
- László Krisztina
- Lábár János László
- László János
- Varga-Josepovits Katalin
- AGHPasierb Paweł
- Färm Elina
- Ritala Mikko
- Leskelä Markku
- Szilágyi Imre Miklós
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 127673 |
|---|---|
| Data dodania do BaDAP | 2020-03-05 |
| Tekst źródłowy | URL |
| DOI | 10.3390/nano10020252 |
| Rok publikacji | 2020 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Nanomaterials |
Abstract
TiO2 and ZnO single and multilayers were deposited on hydroxyl functionalized multi-walled carbon nanotubes using atomic layer deposition. The bare carbon nanotubes and the resulting heterostructures were characterized by TG/DTA, Raman, XRD, SEM-EDX, XPS, TEM-EELS-SAED and low temperature nitrogen adsorption techniques, and their photocatalytic and gas sensing activities were also studied. The carbon nanotubes (CNTs) were uniformly covered with anatase TiO2 and wurtzite ZnO layers and with their combinations. In the photocatalytic degradation of methyl orange, the most beneficial structures are those where ZnO is the external layer, both in the case of single and double oxide layer covered CNTs (CNT-ZnO and CNT-TiO2-ZnO). The samples with multilayer oxides (CNT-ZnO-TiO2 and CNT-TiO2-ZnO) have lower catalytic activity due to their larger average densities, and consequently lower surface areas, compared to single oxide layer coated CNTs (CNT-ZnO and CNT-TiO2). In contrast, in gas sensing it is advantageous to have TiO2 as the outer layer. Since ZnO has higher conductivity, its gas sensing signals are lower when reacting with NH3 gas. The double oxide layer samples have higher resistivity, and hence a larger gas sensing response than their single oxide layer counterparts. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
