Template-free synthesis of 3D Nb3O7F hierarchical nanostructures and enhanced photocatalytic activities

Literature Information

Publication Date 2013-01-24
DOI 10.1039/C2CP44326K
Impact Factor 3.676
Authors

Zheng Wang, Jungang Hou, Chao Yang, Shuqiang Jiao, Kai Huang, Hongmin Zhu


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Abstract

Single-crystalline niobium oxide fluoride (Nb3O7F) hierarchical nanostructures are firstly prepared via a facile hydrothermal method without using any template or surfactant. The results of scanning electron microscopy and transmission electron microscopy showed that the hierarchical morphology of Nb3O7F could be effectively controlled by adjusting the reaction time. Ultraviolet-visible spectra showed that such nanostructures have a narrow absorption peak at around 400 nm compared to Nb2O5. Based on the first-principles plane-wave ultrasoft pseudo potential (USPP) method, the crystal structures of Nb3O7F was optimally calculated for the total density of states (TDOS) and the partial density of states (PDOS) of Nb, O and F atoms. According to the observations of architectures formation, a possible growth mechanism was proposed to explain the transformation of nanoparticles to hierarchical nanostructures via an Ostwald ripening mechanism followed by self-assembly. In particular, the excellent photocatalytic activity of the Nb3O7F hierarchical nanostructures was confirmed by photodegradation of methylene blue, methyl orange and rhodamine B molecules.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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