Twinned Growth of Metal-Free, Triazine-Based Photocatalyst Films as Mixed-Dimensional (2D/3D) van der Waals Heterostructures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00481368" target="_blank" >RIV/61388955:_____/17:00481368 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388980:_____/17:00481368 RIV/61388963:_____/17:00481368 RIV/00216208:11310/17:10365517

Výsledek na webu

<a href="http://dx.doi.org/10.1002/adma.201703399" target="_blank" >http://dx.doi.org/10.1002/adma.201703399</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adma.201703399" target="_blank" >10.1002/adma.201703399</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Twinned Growth of Metal-Free, Triazine-Based Photocatalyst Films as Mixed-Dimensional (2D/3D) van der Waals Heterostructures

Popis výsledku v původním jazyce

Design and synthesis of ordered, metal-free layered materials is intrinsically difficult due to the limitations of vapor deposition processes that are used in their making. Mixed-dimensional (2D/3D) metal-free van der Waals (vdW) heterostructures based on triazine (C3N3) linkers grow as large area, transparent yellow-orange membranes on copper surfaces from solution. The membranes have an indirect band gap (E-g,E-opt = 1.91 eV, E-g,E-elec = 1.84 eV) and are moderately porous (124 m(2) g(-1)). The material consists of a crystalline 2D phase that is fully sp(2) hybridized and provides structural stability, and an amorphous, porous phase with mixed sp(2)-sp hybridization. Interestingly, this 2D/3D vdW heterostructure grows in a twinned mechanism from a one-pot reaction mixture: unprecedented for metal-free frameworks and a direct consequence of on-catalyst synthesis. Thanks to the efficient type I heterojunction, electron transfer processes are fundamentally improved and hence, the material is capable of metal-free, light-induced hydrogen evolution from water without the need for a noble metal cocatalyst (34 mu mol h(-1) g(-1) without Pt). The results highlight that twinned growth mechanisms are observed in the realm of ”wet” chemistry, and that they can be used to fabricate otherwise challenging 2D/3D vdW heterostructures with composite properties.

Název v anglickém jazyce

Twinned Growth of Metal-Free, Triazine-Based Photocatalyst Films as Mixed-Dimensional (2D/3D) van der Waals Heterostructures

Popis výsledku anglicky

Design and synthesis of ordered, metal-free layered materials is intrinsically difficult due to the limitations of vapor deposition processes that are used in their making. Mixed-dimensional (2D/3D) metal-free van der Waals (vdW) heterostructures based on triazine (C3N3) linkers grow as large area, transparent yellow-orange membranes on copper surfaces from solution. The membranes have an indirect band gap (E-g,E-opt = 1.91 eV, E-g,E-elec = 1.84 eV) and are moderately porous (124 m(2) g(-1)). The material consists of a crystalline 2D phase that is fully sp(2) hybridized and provides structural stability, and an amorphous, porous phase with mixed sp(2)-sp hybridization. Interestingly, this 2D/3D vdW heterostructure grows in a twinned mechanism from a one-pot reaction mixture: unprecedented for metal-free frameworks and a direct consequence of on-catalyst synthesis. Thanks to the efficient type I heterojunction, electron transfer processes are fundamentally improved and hence, the material is capable of metal-free, light-induced hydrogen evolution from water without the need for a noble metal cocatalyst (34 mu mol h(-1) g(-1) without Pt). The results highlight that twinned growth mechanisms are observed in the realm of ”wet” chemistry, and that they can be used to fabricate otherwise challenging 2D/3D vdW heterostructures with composite properties.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GJ16-21151Y" target="_blank" >GJ16-21151Y: Krystalické plně aromatické látky (CAMs)</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Advanced Materials

ISSN

0935-9648

e-ISSN

—

Svazek periodika

29

Číslo periodika v rámci svazku

40

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

000413406200018

EID výsledku v databázi Scopus

2-s2.0-85028586024