journal article·2021-06Open access

Ultrathin‐Walled 3D Inorganic Nanostructured Networks Templated from Cross‐Linked Cellulose Nanocrystal Aerogels

Arto Hiltunen, Tyler Or, Kimmo Lahtonen, Harri Ali‐Löytty, Nikolai Tkachenko, Mika Valden, Essi Sarlin, Emily D. Cranston, Jose M. Moran‐Mirabal, Jaana Vapaavuori

Advanced Materials Interfaces· Volume 8· Issue 11

Abstract

Abstract A key challenge in the development of materials for applications in the fields of opto‐ and nanoelectronics, catalysis, separation, and energy conversion is the ability to fabricate 3D inorganic semiconductive nanostructures in a precisely‐controlled and cost‐effective manner. This work describes the fabrication of 3D nanostructured TiO2 monoliths by coating ultraporous cross‐linked cellulose nanocrystal (CNC) aerogel templates with TiO2 layers of controlled thickness via atomic layer deposition (ALD). Following calcination, the resulting hollow inorganic ultraporous 3D networks form the thinnest self‐supporting semiconductive structure (7 nm) fabricated directly on a conductive substrate. The CNC‐templated ALD–TiO2 electrodes are applied toward photoelectrochemical water splitting. The results show that a TiO2 coating as thin as 15 nm produces a maximum water splitting efficiency, resulting in materials savings and reduced fabrication time.
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Research context

OpenAlex topics: Advanced Cellulose Research Studies · Nanomaterials for catalytic reactions · Copper-based nanomaterials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Faculty of Engineering and Natural Sciences Tampere University P.O. Box 541 Tampere 33101 Finland

Department of Chemistry and Chemical Biology McMaster University 1280 Main St. West Hamilton ON L8S 4M1 Canada

Surface Science Group Laboratory of Photonics Tampere University of Technology P.O. Box 692 Tampere FI‐33101 Finland

Department of Materials Science Tampere University of Technology P.O. Box 589 Tampere 33101 Finland

Department of Wood Science University of British Columbia 2424 Main Mall Vancouver BC V6T 1Z4 Canada

Department of Chemical and Biological Engineering The University of British Columbia 2360 East Mall Vancouver BC V6T 1Z3 Canada

Department of Chemistry and Materials Science School of Chemical Engineering Aalto University Aalto FI‐00076 Finland

Funding

Academy of Finland · Natural Sciences and Engineering Research Council of Canada

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