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Journal of Nanoparticle Research

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01.05.2015 | Research Paper

One step to synthesize the nanocomposites of graphene nanosheets and N-doped titania nanoplates with exposed {001} facets for enhanced visible-light photocatalytic activity

verfasst von: Jian-Wen Shi, Chang Liu, Hui-Ying Ai, Jian-Wei Chen, Chong Xie, Guodong Li, Shenghui Yang, Shi Li

Erschienen in: Journal of Nanoparticle Research | Ausgabe 5/2015

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Abstract

Due to large particle size, low specific surface area, and the high recombination rate of the photo-generated electron–hole pairs, micrometer-sized N-doped TiO₂ plates (NTP) with {001} facets generally present lower visible-light photocatalytic activity. In order to solve these problems, the nanocomposite photocatalysts consisted of graphene nanosheets (GR) and N-doped TiO₂ nanoplates (NTNP) with exposed {001} facets were synthesized by a sol–gel process for the first time. The physical and chemical properties of the resultant nanocomposites (NTNP/GR) were studied in detail, and their photocatalytic activities were investigated by the photocatalytic decoloration of methylene blue solution under visible-light irradiation (λ > 420 nm). Owing to smaller particle size (about 25 nm) and higher specific surface area in comparison with micrometer-sized NTP, the photocatalytic activity of NTNP was improved effectively. Due to the effective charge anti-recombination of graphene, the photocatalytic activity of nanocomposite NTNP/GR was further improved. Due to the competition for light absorption between graphene and NTNP, there was an optimal ratio (1.0 %, the weight percentage of graphene to TiO₂) between graphene and NTNP for the maximum of visible-light photocatalytic activity.

Vorheriger Artikel Optical properties and visible-light-driven photocatalytic activity of Bi8V2O17 nanoparticles

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Titel: One step to synthesize the nanocomposites of graphene nanosheets and N-doped titania nanoplates with exposed {001} facets for enhanced visible-light photocatalytic activity
verfasst von: Jian-Wen Shi
Chang Liu
Hui-Ying Ai
Jian-Wei Chen
Chong Xie
Guodong Li
Shenghui Yang
Shi Li
Publikationsdatum: 01.05.2015
Verlag: Springer Netherlands
Erschienen in: Journal of Nanoparticle Research / Ausgabe 5/2015
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-015-3014-5

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