Synthesis of 2D anatase TiO 2 with highly reactive facets by fluorine-free topochemical conversion of 1T-TiS 2 nanosheets
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- Department of Chemistry, University of Manchester, Oxford Road, Manchester, UK, M13 9PL
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, UK, M13 9PL, Dalton Cumbrian Facility, University of Manchester, Westlakes Science and Technology Park, Moor Row, Cumbria, UK, CA24 3HA, UK
- Physics Department, Université de Namur, Rue de Bruxelles, Namur, Belgium
- ICCOM-CNR, Via Madonna del Piano 10, 50019, Sesto Fiorentino (FI), Italy
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA, Applied Science and Technology Graduate Group, University of California, Berkeley, CA, 94720, USA
- School of Automotive Engineering, Guangdong Polytechnic of Science and Technology, Zhuhai, P. R. China
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P. R. China
- HP Laboratories, 1501 Page Mill Road, Palo Alto, California, 94304, USA
- Department of Materials Science, University of Milano-Bicocca, Via Cozzi 5, 20125, Milano, Italy
Two-dimensional (2D) anatase titanium dioxide (TiO2) is expected to exhibit different properties as compared to anatase nanocrystallites, due to its highly reactive exposed facets. However, access to 2D anatase TiO2 is limited by the non-layered nature of the bulk crystal, which does not allow use of top-down chemical exfoliation. Large efforts have been dedicated to the growth of 2D anatase TiO2 with high reactive facets by bottom-up approaches, which relies on the use of harmful chemical reagents. Here, we demonstrate a novel fluorine-free strategy based on topochemical conversion of 2D 1T-TiS2 for the production of single crystalline 2D anatase TiO2, exposing the {001} facet on the top and bottom and {100} at the sides of the nanosheet. The exposure of these faces, with no additional defects or doping, gives rise to a significant activity enhancement in the hydrogen evolution reaction, as compared to commercially available Degussa P25 TiO2 nanoparticles. Because of the strong potential of TiO2 in many energy-based applications, our topochemical approach offers a low cost, green and mass scalable route for production of highly crystalline anatase TiO2 with well controlled and highly reactive exposed facets.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Molecular Foundry
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; Engineering and Physical Sciences Research Council (EPSRC); Guangdong Provincial Department of Education; Guangdong Polytechnic of Science and Technology; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- Grant/Contract Number:
- AC02-05CH11231; 825213; EP/N010345; 2021KTSCX216; XJPY202101
- OSTI ID:
- 1873195
- Alternate ID(s):
- OSTI ID: 1875449
- Journal Information:
- Journal of Materials Chemistry. A, Journal Name: Journal of Materials Chemistry. A Vol. 10 Journal Issue: 26; ISSN 2050-7488
- Publisher:
- Royal Society of Chemistry (RSC)Copyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
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