NDLI: Template-Free Synthesis of Core–Shell $TiO_{2}$ Microspheres Covered with High-Energy {116}-Facet-Exposed N-Doped Nanosheets and Enhanced Photocatalytic Activity under Visible Light

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Template-Free Synthesis of Core–Shell $TiO_{2}$ Microspheres Covered with High-Energy {116}-Facet-Exposed N-Doped Nanosheets and Enhanced Photocatalytic Activity under Visible Light

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Chen, Qifeng Ren, Baosheng Zhao, Yubao Zhao, Jincai Xu, Xun Guan, Ruifang Ge, Heyi
Description	Author Affiliation: Chen Q ( Advanced Building Materials Engineering Research Centre, The Ministry of Education, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Nanxinzhuang West Rd 336, Jinan, Shandong 250022 (P.R. China). qfchen@126.com.)
Abstract	Core–shell $TiO_{2}$ microspheres possess a unique structure and interesting properties, and therefore, they have received much attention. The high-energy facets of $TiO_{2}$ also are being widely studied for the high photocatalytic activities they are associated with. However, the synthesis of the core–shell structure is difficult to achieve and requires multiple-steps and/or is expensive. Hydrofluoric acid (HF), which is highly corrosive, is usually used in the controlling high-energy facet production. Therefore, it is still a significant challenge to develop low-temperature, template-free, shape-controlled, and relative green self-assembly routes for the formation of core–shell-structured $TiO_{2}$ microspheres with high-energy facets. Here, we report a template- and hydrofluoric acid free solvothermal self-assembly approach to synthesize core–shell $TiO_{2}$ microspheres covered with high-energy {116}-facet-exposed nanosheets, an approach in which 1,4-butanediamine plays a key role in the formation of nanosheets with exposed {116} facets and the doping of nitrogen in situ. In the structure, nanoparticle aggregates and nanosheets with {116} high-energy facets exposed act as core and shell, respectively. The photocatalytic activity for degradation of 2,4,6-tribromophenol and Rhodamine B under visible irradiation and UV/Vis irradiation has been examined, and improved photocatalytic activity under visible light owing to the hierarchical core–shell structure, {116}-plane-oriented nanosheets, in situ N doping, and large surface areas has been found.
ISSN	09476539
e-ISSN	15213765
Journal	Chemistry - A European Journal
Issue Number	51
Volume Number	20
Language	English
Publisher	Wiley-VCH;ChemPubSoc Europe
Publisher Date	2014-12-15
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Catalysis

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