Photoactive and water-repellent g-C3N4/poly(alkyl siloxane) coatings on porous sandstone

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F26%3A00643717" target="_blank" >RIV/68145535:_____/26:00643717 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/s10064-025-04675-4" target="_blank" >https://doi.org/10.1007/s10064-025-04675-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10064-025-04675-4" target="_blank" >10.1007/s10064-025-04675-4</a>

Result language

angličtina

Original language name

Photoactive and water-repellent g-C3N4/poly(alkyl siloxane) coatings on porous sandstone

Original language description

Graphitic carbon nitride (g-C3N4) was synthesised by thermal polycondensation of melamine and subsequently exfoliated by calcination at 600 degrees C for 30, 45, and 60 min. The resulting nanoparticles-differing in morphology, size, and specific surface area-were dispersed in a poly(alkyl siloxane) hydrophobising agent at concentrations of 2 g<middle dot>L--(1) and 4 g<middle dot>L--(1) and applied to the surface of porous quartz sandstone. The effect of the degree of g-C3N4 exfoliation on the self-cleaning performance of the resulting coatings and their interaction with water was evaluated. Photodegradation tests performed on sandstone samples artificially stained with Rhodamine B confirmed a self-cleaning effect for coatings containing particles exfoliated for 45 and 60 min, at a concentration of 4 g of g-C3N4 per litre of poly(alkyl siloxane). The addition of nano-g-C3N4 enhanced the hydrophobicity of the sandstone surface. The coatings substantially reduced water uptake into the stone's pore system while still allowing water vapour to evaporate freely into the surrounding environment. g-C3N4 thus appears to be a promising photocatalytically active nanomaterial for self-cleaning and water-repellent surface protection of building and sculptural stone-a field in which it has not yet been applied.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/GA24-10949S" target="_blank" >GA24-10949S: Potential of photoactive g-C3N4 nanoparticles for multifunctional protection of building stone</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2026

Confidentiality

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

Name of the periodical

Bulletin of Engineering Geology and the Environment

ISSN

1435-9529

e-ISSN

1435-9537

Volume of the periodical

85

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

15

Pages from-to

42

UT code for WoS article

001637729900002

EID of the result in the Scopus database

2-s2.0-105024668178