Nanostar morphology of plasmonic particles strongly enhances photoelectrochemical water splitting of TiO2 nanorods with superior incident photon-to-current conversion efficiency in visible/near-infrared region

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73584606" target="_blank" >RIV/61989592:15310/17:73584606 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0013468617324672" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0013468617324672</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2017.11.106" target="_blank" >10.1016/j.electacta.2017.11.106</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nanostar morphology of plasmonic particles strongly enhances photoelectrochemical water splitting of TiO2 nanorods with superior incident photon-to-current conversion efficiency in visible/near-infrared region

Popis výsledku v původním jazyce

Photoelectrochemical (PEC) water splitting with TiO2 photoanodes is a promising technique for converting solar energy into a clean chemical energy. The key drawbacks of titania involve still a low PEC performance and its large band gap energy allowing absorption only in the UVregion. Plasmonic nanostructures such as Au and Ag represent a powerful tool towards the light harvesting enhancement with the efficiency dependent on their size and loading. Here, the unique nanostar morphology of plasmonic particles is presented as a new principal factor allowing the significant improvement of the incident photon-to-current conversion efficiency (IPCE) and the extension of light absorption over the broadband UV-Vis-NIR region. A plasmonic metal/semiconductor heterostructure synthesis is based on ex situ deposition of multispiked gold nanostars (Au-NSs) onto hydrothermally grown TiO2 nanorods. Compared to bare TiO2 nanorods, the Au-NSs-decorated TiO2 exhibits 350% and ca. 20% increase in the photocurrent density under visible light and simulated sunlight irradiation, respectively. Importantly, a significant enhancement of IPCE over the Vis-NIR region is observed with single-phase Au-NSs, the value two times higher compared to the spherical morphology. This is largely attributed to the long-wavelength plasmon resonances of Au-NSs and their ability to promote surface plasmon resonance (SPR)-mediated hot electron transfer.

Název v anglickém jazyce

Nanostar morphology of plasmonic particles strongly enhances photoelectrochemical water splitting of TiO2 nanorods with superior incident photon-to-current conversion efficiency in visible/near-infrared region

Popis výsledku anglicky

Photoelectrochemical (PEC) water splitting with TiO2 photoanodes is a promising technique for converting solar energy into a clean chemical energy. The key drawbacks of titania involve still a low PEC performance and its large band gap energy allowing absorption only in the UVregion. Plasmonic nanostructures such as Au and Ag represent a powerful tool towards the light harvesting enhancement with the efficiency dependent on their size and loading. Here, the unique nanostar morphology of plasmonic particles is presented as a new principal factor allowing the significant improvement of the incident photon-to-current conversion efficiency (IPCE) and the extension of light absorption over the broadband UV-Vis-NIR region. A plasmonic metal/semiconductor heterostructure synthesis is based on ex situ deposition of multispiked gold nanostars (Au-NSs) onto hydrothermally grown TiO2 nanorods. Compared to bare TiO2 nanorods, the Au-NSs-decorated TiO2 exhibits 350% and ca. 20% increase in the photocurrent density under visible light and simulated sunlight irradiation, respectively. Importantly, a significant enhancement of IPCE over the Vis-NIR region is observed with single-phase Au-NSs, the value two times higher compared to the spherical morphology. This is largely attributed to the long-wavelength plasmon resonances of Au-NSs and their ability to promote surface plasmon resonance (SPR)-mediated hot electron transfer.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Electrochimica Acta

ISSN

0013-4686

e-ISSN

—

Svazek periodika

260

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

212-220

Kód UT WoS článku

000419831600024

EID výsledku v databázi Scopus

2-s2.0-85037979111