High-affinity adsorption leads to molecularly ordered interfaces on TiO2 in air and solution

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F18%3APU128839" target="_blank" >RIV/00216305:26620/18:PU128839 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1126/science.aat6752" target="_blank" >http://dx.doi.org/10.1126/science.aat6752</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1126/science.aat6752" target="_blank" >10.1126/science.aat6752</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-affinity adsorption leads to molecularly ordered interfaces on TiO2 in air and solution

Popis výsledku v původním jazyce

Researchers around the world have observed the formation of molecularly ordered structures of unknown origin on the surface of titanium dioxide (TiO2) photocatalysts exposed to air and solution. Using a combination of atomic-scale microscopy and spectroscopy, we show that TiO2 selectively adsorbs atmospheric carboxylic acids that are typically present in parts-per-billion concentrations while effectively repelling other adsorbates, such as alcohols, that are present in much higher concentrations. The high affinity of the surface for carboxylic acids is attributed to their bidentate binding. These self-assembled monolayers have the unusual property of being both hydrophobic and highly water-soluble, which may contribute to the self-cleaning properties of TiO2. This finding is relevant to TiO2 photocatalysis, because the self-assembled carboxylate monolayers block the undercoordinated surface cation sites typically implicated in photocatalysis.

Název v anglickém jazyce

High-affinity adsorption leads to molecularly ordered interfaces on TiO2 in air and solution

Popis výsledku anglicky

Researchers around the world have observed the formation of molecularly ordered structures of unknown origin on the surface of titanium dioxide (TiO2) photocatalysts exposed to air and solution. Using a combination of atomic-scale microscopy and spectroscopy, we show that TiO2 selectively adsorbs atmospheric carboxylic acids that are typically present in parts-per-billion concentrations while effectively repelling other adsorbates, such as alcohols, that are present in much higher concentrations. The high affinity of the surface for carboxylic acids is attributed to their bidentate binding. These self-assembled monolayers have the unusual property of being both hydrophobic and highly water-soluble, which may contribute to the self-cleaning properties of TiO2. This finding is relevant to TiO2 photocatalysis, because the self-assembled carboxylate monolayers block the undercoordinated surface cation sites typically implicated in photocatalysis.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

SCIENCE

ISSN

0036-8075

e-ISSN

1095-9203

Svazek periodika

361

Číslo periodika v rámci svazku

6404

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

4

Strana od-do

786-789

Kód UT WoS článku

000442828700041

EID výsledku v databázi Scopus

2-s2.0-85052089175