An electrochemical synthesis route to form heterojunction of BiVQ4/ZnO nanodendrites for solar water splitting

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F23%3A63575178" target="_blank" >RIV/70883521:28610/23:63575178 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

An electrochemical synthesis route to form heterojunction of BiVQ4/ZnO nanodendrites for solar water splitting

Popis výsledku v původním jazyce

A large electrochemical surface area, broad light harvesting capacity, and rapid charge transfer are decisive features of a photoanode for photoelectrochemical (PEC) water splitting enhancement. ln line with these targets, we present that 3D hierarchical ZnO nanodendrites (NDs) can be coupled with BiVO4 by chemical and thermal treatments of electrodeposited Bi metal films. The branches of ZnO NDs was subsequently formed around the hydrothermally grown ZnO NRs without secondary seed layer or organic structure directing agent. The fiat band measurements revealed the formation of type-li band alignment with a feasible electron transfer from BiVO4 to ZnO NDs. As confirmed by IPCE. and ABPE tests, the overall PEC activity of BiVO4/ZnO NDs consists of UV and visible spectral photoresponses from ZnO NDs and BiVO4, respectively. Under AM1 .5g illumination, BiVOJZnO NDs photoanode exhibited the maximum photocurrent density (0.15 mA.cm-2 at 1.2 V vs. NHE) compared to pristine ZnO NDs, ZnO NRs and BiVO4. ln addition, the heterojunction based photoanode also yielded promising photocurrent upon exposure to visible light (,l &gt; 420 nm). This superior performance was assigned to the increased surface area (due to the branches), broad light absorption, and most rapid interfacial charge transfer. The obtained results provide a facile strategy for fabricating heterojunction as an efficient photoanode in a PEC cell.

Název v anglickém jazyce

An electrochemical synthesis route to form heterojunction of BiVQ4/ZnO nanodendrites for solar water splitting

Popis výsledku anglicky

A large electrochemical surface area, broad light harvesting capacity, and rapid charge transfer are decisive features of a photoanode for photoelectrochemical (PEC) water splitting enhancement. ln line with these targets, we present that 3D hierarchical ZnO nanodendrites (NDs) can be coupled with BiVO4 by chemical and thermal treatments of electrodeposited Bi metal films. The branches of ZnO NDs was subsequently formed around the hydrothermally grown ZnO NRs without secondary seed layer or organic structure directing agent. The fiat band measurements revealed the formation of type-li band alignment with a feasible electron transfer from BiVO4 to ZnO NDs. As confirmed by IPCE. and ABPE tests, the overall PEC activity of BiVO4/ZnO NDs consists of UV and visible spectral photoresponses from ZnO NDs and BiVO4, respectively. Under AM1 .5g illumination, BiVOJZnO NDs photoanode exhibited the maximum photocurrent density (0.15 mA.cm-2 at 1.2 V vs. NHE) compared to pristine ZnO NDs, ZnO NRs and BiVO4. ln addition, the heterojunction based photoanode also yielded promising photocurrent upon exposure to visible light (,l &gt; 420 nm). This superior performance was assigned to the increased surface area (due to the branches), broad light absorption, and most rapid interfacial charge transfer. The obtained results provide a facile strategy for fabricating heterojunction as an efficient photoanode in a PEC cell.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

<a href="/cs/project/LTT20010" target="_blank" >LTT20010: Povrchově funkcionalizovaná skla: koncept heterostrukturovaných nanočástic inspirovaných umělou fotosyntézou</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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