Preparation of morphology-controlled TiO{sub 2} nanocrystals for the excellent photocatalytic activity under simulated solar irradiation

Journal Article · Sun Oct 15 00:00:00 EDT 2017 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2017.05.029· OSTI ID:22730404

Wang, Dandan ^[1]; Yang, Jinghai ^[2]; Li, Xiuyan ^[2]; Wang, Jian; Lang, Jihui; Wang, Jingshu ^[2]; Song, Hang ^[1]

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1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033 (China)
2. Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping 136000 (China)

Graphical abstract: Morphology-controlled TiO{sub 2} nanocrystals with excellent photocatalytic activity under simulated solar irradiation were successfully synthesized. - Highlights: • TiO{sub 2} nanocrystals (NCs) with different morphologies were synthesized. • The growth mechanism of morphology-controlled TiO{sub 2} NCs was proposed. • The core-shell structured TiO{sub 2} NCs (co-TiO{sub 2}) had a narrow band gap (2.67 eV). • The co-TiO{sub 2} NCs possessed excellent photocatalytic activity and recyclability. - Abstract: A simple synthetic approach based on solvothermal technique and hydrogenation was developed for preparation of TiO{sub 2} nanocrystals with different morphologies such as elongated rhombic, dog-bone, oval and core-shell structured oval. The effect of oleic acid (OA) and oleylamine (OM) as two capping surfactants on the growth of TiO{sub 2} nanocrystals was investigated. The physicochemical properties of the obtained samples were characterized by various techniques including TEM, XRD, UV–vis absorption, Raman, XPS, BET, PL and photocurrent measurement. In photodegradation of RhB under simulated solar irradiation, the oval-shaped TiO{sub 2} nanocrystals with core-shell structure (co-TiO{sub 2}) was superior to other TiO{sub 2} nanocrystals in catalytic activity. Moreover, the co-TiO{sub 2} nanocrystals exhibited well recyclability during multiple photocatalytic tests. These excellent properties of co-TiO{sub 2} were attributed to its special structure, including lattice-disordered surface layer and well-crystallized lattice core, and narrow band gap (2.67 eV).

• OSTI ID: 22730404
• Journal Information: Materials Research Bulletin, Vol. 94; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL GROWTH
IRRADIATION
NANOSTRUCTURES
OLEIC ACID
OXIDATION
PHOTOCATALYSIS
SIMULATION
SYNTHESIS
TITANIUM OXIDES
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY