Seed-Mediated Growth of Anatase TiO 2 Nanocrystals with Core–Antenna Structures for Enhanced Photocatalytic Activity

Liu, Yiding; Tang, Aiwei; Zhang, Qiao; Yin, Yadong

doi:10.1021/jacs.5b04676

Title: Seed-Mediated Growth of Anatase TiO ₂ Nanocrystals with Core–Antenna Structures for Enhanced Photocatalytic Activity

Journal Article · Mon Aug 31 00:00:00 EDT 2015 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/jacs.5b04676· OSTI ID:1250543

Liu, Yiding; Tang, Aiwei ^[1]; Zhang, Qiao ^[2]; Yin, Yadong

Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing Jiaotong University, Beijing 100044, China
Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China

Here, we demonstrate that anatase TiO₂ nanocrystals composed of a nanocrystal core and nanorod antennas can be produced via a nonaqueous colloidal seed-mediated growth method. Anatase TiO₂ nanocrystals with defined morphologies were first prepared as seeds, and then secondary anatase TiO₂ nanorods were grown on the defined facets of the seeds under appropriate conditions. Systematic studies on the growth mechanism reveal that the formation of core–antenna nanocrystals involves an epitaxial growth process with specific orientational preference governed by both thermodynamic and kinetic factors. By manipulating the reaction conditions including the precursor amount and introduction rate, the epitaxial growth behavior can be well controlled. By further varying the morphology of seed nanocrystals, we have also been able to produce core–antenna anatase TiO₂ nanocrystals with complex spatial configurations in a highly predictable manner. The high structural configurability and predictability offered by this seed-mediated growth method may provide great opportunities in enhancing the performance of TiO₂-based nanostructures in many energy-related applications. As a demonstration, we show by simply manipulating the core–antenna structures that the photocatalytic activity of the anatase nanocrystals can be improved from the relatively less active seed nanocrystals or pure nanorods to the extent that exceeds the activity of the commercial P25 titania.

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Research Organization:: Univ. of California, Riverside, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0002247

OSTI ID:: 1250543

Alternate ID(s):: OSTI ID: 1458976

Journal Information:: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Vol. 137 Journal Issue: 35; ISSN 0002-7863

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 69 works

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Title: Seed-Mediated Growth of Anatase TiO ₂ Nanocrystals with Core–Antenna Structures for Enhanced Photocatalytic Activity