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Title: Mesoporous titanium oxynitride monoliths from block copolymer-directed self-assembly of metal-urea additives
Authors: Li, Yun
Horia, Raymond
Tan, Wei Xin
Larbaram, Nathawat
Sasangka, Wardhana A.
Manalastas, William, Jr.
Madhavi, Srinivasan
Tan, Kwan Wee
Keywords: Engineering::Materials::Nanostructured materials
Engineering::Materials::Energy materials
Issue Date: 2020
Source: Li, Y., Horia, R., Tan, W. X., Larbaram, N., Sasangka, W. A., Manalastas, W., Jr., ... Tan, K. W. (2020). Mesoporous titanium oxynitride monoliths from block copolymer-directed self-assembly of metal-urea additives. Langmuir, 36(36), 10803-10810. doi:10.1021/acs.langmuir.0c01729
Journal: Langmuir
Abstract: This report describes a simple one-pot soft-templating and ammonolysis-free approach to synthesize mesoporous crystalline titanium oxynitride by combining block copolymer-directed self-assembly with metal sol and urea precursors. The Pluronic F127 triblock copolymer was employed to structure-direct titanium-oxo-acetate sol nanoparticles and urea-formaldehyde into ordered hybrid mesostructured monoliths. The hybrid composites were directly converted into mesoporous crystalline titanium oxynitride and retained macroscale monolithic integrity up to 800 °C under nitrogen. Notably, the urea-formaldehyde additive provided nitrogen and rigid support to the inorganic mesostructure during crystallization. The resultant mesoporous titanium oxynitride exhibited good electrochemical catalytic activity toward hydrogen evolution reaction in 1 M KOH aqueous medium under applied bias. Our results suggest an inexpensive and safe pathway to generate ordered mesoporous crystalline metal oxynitride structures suitable for catalyst and energy-storage applications.
ISSN: 1520-5827
DOI: 10.1021/acs.langmuir.0c01729
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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