Antifouling performance of photocatalytic superhydrophobic coatings against Klebsormidium alga

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00114874" target="_blank" >RIV/00216224:14310/20:00114874 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jece.2020.104153" target="_blank" >https://doi.org/10.1016/j.jece.2020.104153</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jece.2020.104153" target="_blank" >10.1016/j.jece.2020.104153</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Antifouling performance of photocatalytic superhydrophobic coatings against Klebsormidium alga

Popis výsledku v původním jazyce

Colonization of man-made surface materials by algae and other microorganisms, i.e. biofouling, causes various aesthetical and health problems as well as deterioration of appearance and surface functioning. The present study investigated eight complex surfaces combining various TiO2, alkoxy-siloxane and hydrophobization agents that were combined to prevent growth of phototrophic filamentous alga Klebsormidium sp. Regarding photoactivity, NOx abatement at the studied surfaces has been improved by adding anti-aggregation substances such as bentonite. Surface properties were characterized by confocal microscopy, scanning electron microscopy, SEM, with the energy dispersive X-ray spectroscopy, EDX, and the contact angle measurements. Biological experiments with Klebsormidium alga were performed in a constructed flow-through system. The results indicated that super-hydrophobicity, i.e. very low surface energy, was critical for efficient antifouling during the early colonization by algae. This was specifically demonstrated in two novel composite samples made of titanium dioxide and commercial hydrophobization agent UltraEverDry. Low surface energy of these materials (around 1.3 mJ/m(2)), high water contact angles (&gt; 140 degrees) as well as decent photoactivity (NOx conversions by 16.7 % and 1.4 % in UV and VIS, respectively), provide a promising basis for further longer-term anti-fouling experiments. The present study introduces novel composite materials preventing the algal fouling, and it brings new evidences on the interactive effects on hydrophobic and photoactive surfaces.

Název v anglickém jazyce

Antifouling performance of photocatalytic superhydrophobic coatings against Klebsormidium alga

Popis výsledku anglicky

Colonization of man-made surface materials by algae and other microorganisms, i.e. biofouling, causes various aesthetical and health problems as well as deterioration of appearance and surface functioning. The present study investigated eight complex surfaces combining various TiO2, alkoxy-siloxane and hydrophobization agents that were combined to prevent growth of phototrophic filamentous alga Klebsormidium sp. Regarding photoactivity, NOx abatement at the studied surfaces has been improved by adding anti-aggregation substances such as bentonite. Surface properties were characterized by confocal microscopy, scanning electron microscopy, SEM, with the energy dispersive X-ray spectroscopy, EDX, and the contact angle measurements. Biological experiments with Klebsormidium alga were performed in a constructed flow-through system. The results indicated that super-hydrophobicity, i.e. very low surface energy, was critical for efficient antifouling during the early colonization by algae. This was specifically demonstrated in two novel composite samples made of titanium dioxide and commercial hydrophobization agent UltraEverDry. Low surface energy of these materials (around 1.3 mJ/m(2)), high water contact angles (&gt; 140 degrees) as well as decent photoactivity (NOx conversions by 16.7 % and 1.4 % in UV and VIS, respectively), provide a promising basis for further longer-term anti-fouling experiments. The present study introduces novel composite materials preventing the algal fouling, and it brings new evidences on the interactive effects on hydrophobic and photoactive surfaces.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

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

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of Environmental Chemical Engineering

ISSN

2213-3437

e-ISSN

—

Svazek periodika

8

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

1-9

Kód UT WoS článku

000575540800003

EID výsledku v databázi Scopus

2-s2.0-85089467229