Controlling nanoparticle placement in Au/TiO2 inverse opal photocatalysts

Marianne Bijl; Kang Rui Garrick Lim; Sadhya Garg; Natalie J. Nicolas; Nienke L. Visser; Michael Aizenberg; Jessi E.S. van der Hoeven; Joanna Aizenberg

doi:10.1039/d4nr01200c

Controlling nanoparticle placement in Au/TiO₂ inverse opal photocatalysts

Marianne Bijl, Kang Rui Garrick Lim, Sadhya Garg, Natalie J. Nicolas, Nienke L. Visser, Michael Aizenberg, Jessi E.S. van der Hoeven^*, Joanna Aizenberg^*

^*Corresponding author for this work

Harvard University

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Gold nanoparticle-loaded titania (Au/TiO₂) inverse opals are highly ordered three-dimensional photonic structures with enhanced photocatalytic properties. However, fine control over the placement of the Au nanoparticles in the inverse opal structures remains challenging with traditional preparative methods. Here, we present a multi-component co-assembly strategy to prepare high-quality Au/TiO₂ inverse opal films in which Au nanoparticles are either located on, or inside the TiO₂ matrix, as verified using electron tomography. We report that Au nanoparticles embedded in the TiO₂ support exhibit enhanced thermal and mechanical stability compared to non-embedded nanoparticles that are more prone to both leaching and sintering.

Original language	English
Pages (from-to)	13867-13873
Number of pages	7
Journal	Nanoscale
Volume	16
Issue number	29
DOIs	https://doi.org/10.1039/d4nr01200c
Publication status	Published - 19 Jun 2024

Bibliographical note

Publisher Copyright:
© 2024 The Royal Society of Chemistry.

Funding

This work was supported by the U. S. Defense Threat Reduction Agency (DTRA) under Award #HDTR1211001612. Electron tomography work was supported by the Starting PI Fund of the Electron Microscopy Center at Utrecht University. Physical characterization was performed at the Center for Nanoscale Systems (CNS), a member of the National Nanotechnology Coordinated Infrastructure Network (NNCI), which is supported by the National Science Foundation under NSF ECCS award #1541959. M. B. acknowledges financial support from the Henrik Mullerfonds and Science for Sustainability community at Utrecht University. K. R. G. L. acknowledges financial support from the Agency for Science, Technology and Research (A*STAR) Singapore National Science Scholarship (PhD). J. E. S. v. d. H. acknowledges funding from the NWO Veni project with project number VI.Veni.212.046 which is financed by the Dutch Research Council (NWO).

Funders	Funder number
U. S. Defense Threat Reduction Agency (DTRA)	HDTR1211001612
Starting PI Fund of the Electron Microscopy Center at Utrecht University
National Science Foundation	1541959
Henrik Mullerfonds and Science for Sustainability community at Utrecht University
Agency for Science, Technology and Research (A*STAR) Singapore National Science Scholarship
NWO Veni project
Dutch Research Council (NWO)	VI.Veni.212.046

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d4nr01200cFinal published version, 1.02 MBLicence: CC BY

Cite this

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title = "Controlling nanoparticle placement in Au/TiO2 inverse opal photocatalysts",

abstract = "Gold nanoparticle-loaded titania (Au/TiO2) inverse opals are highly ordered three-dimensional photonic structures with enhanced photocatalytic properties. However, fine control over the placement of the Au nanoparticles in the inverse opal structures remains challenging with traditional preparative methods. Here, we present a multi-component co-assembly strategy to prepare high-quality Au/TiO2 inverse opal films in which Au nanoparticles are either located on, or inside the TiO2 matrix, as verified using electron tomography. We report that Au nanoparticles embedded in the TiO2 support exhibit enhanced thermal and mechanical stability compared to non-embedded nanoparticles that are more prone to both leaching and sintering.",

author = "Marianne Bijl and Lim, {Kang Rui Garrick} and Sadhya Garg and Nicolas, {Natalie J.} and Visser, {Nienke L.} and Michael Aizenberg and {van der Hoeven}, {Jessi E.S.} and Joanna Aizenberg",

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