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Title: Optimising the structure of mesoporous niobium oxide using evaporation-induced self-assembly synthesis method Authors: ID Nadrah, Peter (Author) ID Knap, Mateja (Author) ID Švara Fabjan, Erika (Author) ID Šuligoj, Andraž (Author) ID Lavrenčič Štangar, Urška (Author) ID Dražić, Goran (Author) ID Novak Tušar, Nataša (Author) ID Sever Škapin, Andrijana (Author) Files: URL - Source URL, visit https://doi.org/10.1016/j.micromeso.2025.113994   PDF - Presentation file, download (5,30 MB) MD5: E90C6B7DC00034A1475C866489153B14   PDF - Supplement, download (2,20 MB) MD5: 8857C8C127B83044DAE60E5F64F45507   This document has even more files. Complete list of files is available below. Language: English Typology: 1.01 - Original Scientific Article Organization: ZAG - Slovenian National Building and Civil Engineering Institute Abstract: To increase the photocatalytic performance of Niobium(V) oxide (Nb2O5) it is necessary to increase its accessible surface area. The evaporation-induced self-assembly (EISA) synthesis method is well suited for the synthesis of mesoporous structures, but the optimisation of synthesis parameters for Nb2O5 is still limited. In this study, we demonstrate that the synthesis parameters — duration of evaporation, airflow rate, relative humidity and water content in the reaction mixture — significantly affect the specific surface area, mesoporous structure and photocatalytic performance of isopropanol oxidation into acetone of Nb2O5. Our results show that a combination of long evaporation duration, low airflow rate, low relative humidity and moderate water content are needed to obtain material with the highest specific surface area (145 m2 g−1) and a narrow hysteresis loop in the N2 sorption isotherm. This material exhibits four times higher photocatalytic activity compared to materials synthesised under less favourable conditions (14.3–17.7 μmol h−1 compared to 3.7 μmol h−1). We also show that the ordered mesoporous structure plays an important role in improving the photocatalytic performance: the materials with a higher degree of order exhibit about two times higher activity than the materials with a lower degree of order with the same specific surface area (10.4–12.1 μmol h−1 compared to 4.9–7.9 μmol h−1). These results provide valuable insights for optimising the synthesis of mesoporous niobium oxide to increase both the specific surface area and photocatalytic performance. Keywords: Nb2O5, mesoporous material, evaporation-induced self-assembly, photocatalysis Publication status: Published Publication version: Version of Record Publication date: 19.12.2025 Publisher: Elsevier Year of publishing: 2026 Number of pages: str. 1-9 Numbering: Vol. 402, [article no.] 113994 PID: 20.500.12556/DiRROS-25139  UDC: 54 ISSN on article: 1873-3093 DOI: 10.1016/j.micromeso.2025.113994  COBISS.SI-ID: 263282691  Copyright: © 2025 The Authors Publication date in DiRROS: 12.01.2026 Views: 109 Downloads: 93 Metadata:    Cite this work Plain text BibTeX EndNote XML EndNote/Refer RIS ABNT ACM Ref AMA APA Chicago 17th Author-Date Harvard IEEE ISO 690 MLA Vancouver : Copy citation

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Record is a part of a journal

Title:	Microporous and Mesoporous Materials
Publisher:	Elsevier
ISSN:	1873-3093
COBISS.SI-ID:	22924293

Document is financed by a project

Funder:	ARIS - Slovenian Research and Innovation Agency
Project number:	J2-4441
Name:	Dvojno delujoči Nb2O5 in Nb2O5-TiO2 materiali za sočasno redukcijo CO2 in oksidacijo organskih snovi v spojine z dodano vrednostjo

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Funder:	ARIS - Slovenian Research and Innovation Agency
Project number:	P2-0273
Name:	Gradbeni objekti in materiali

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Funder:	ARIS - Slovenian Research and Innovation Agency
Project number:	P1-0418
Name:	Kemija katalizatorjev za čisti zrak

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Funder:	ARIS - Slovenian Research and Innovation Agency
Project number:	P1-0134
Name:	Kemija za trajnostni razvoj

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Funder:	ARIS - Slovenian Research and Innovation Agency
Project number:	P2-0421
Name:	Trajnostne tehnologije in krožno gospodarstvo

Licences

License:	CC BY-NC 4.0, Creative Commons Attribution-NonCommercial 4.0 International
Link:	http://creativecommons.org/licenses/by-nc/4.0/
Description:	A creative commons license that bans commercial use, but the users don’t have to license their derivative works on the same terms.
Licensing start date:	12.12.2025
Applies to:	Text and Data Mining valid from 2026-02-01 Text and Data Mining valid from 2026-02-01 Version of Record valid from 2025-12-12

Secondary language

Language:	Slovenian
Keywords:	Nb2O5, mezoporozni material, samourejanje z odparevanjem topila, fotokataliza

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