Synthesis of novel hollow microflowers (NHMF) of Nb3O 7F, their optical and hydrogen storage properties

Faryal Idrees; Chuanbao Cao; Faheem K. Butt; Muhammad Tahir; Imran Shakir; Muhammad Rizwan; Imran Aslam; M. Tanveer; Zulfiqar Ali

doi:10.1016/j.ijhydene.2014.06.142

Synthesis of novel hollow microflowers (NHMF) of Nb₃O ₇F, their optical and hydrogen storage properties

Faryal Idrees, Chuanbao Cao^*, Faheem K. Butt, Muhammad Tahir, Imran Shakir, Muhammad Rizwan, Imran Aslam, M. Tanveer, Zulfiqar Ali

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

A two step, facile surfactant free hydrothermal route was adopted to synthesize Nb₃O₇F novel hollow microflowers (NHMF). Time dependent experiments were performed which suggested Nb₃O ₇F-NHMF were formed due to Ostwald-ripening process. Raman spectroscopy was conducted to understand different vibrational modes of Nb ₃O₇F-NHMF. Its characteristic band at 692 cm^-1 was observed which is associated to NbO₆ octahedron sharing. The bandgap of 3.2 eV was calculated by using UV-VIS-NIR absorption spectrum. Considering importance of layered structures in energy storage applications, hydrogen storage ability of Nb₃O₇F-NHMF were measured for the first time. The maximum values of hydrogen absorption for Nb ₃O₇F-NHMF at 373 K and 473 K were 0.789 wt.% and 1.08 wt.%, respectively. The hydrogen storage measurements revealed the potential of Nb₃O₇F-NHMF as prospective material for energy storage applications.

Original language	English
Pages (from-to)	13174-13179
Number of pages	6
Journal	International Journal of Hydrogen Energy
Volume	39
Issue number	25
DOIs	https://doi.org/10.1016/j.ijhydene.2014.06.142
Publication status	Published - 22 Aug 2014

Keywords

Hydrogen storage
Novel microflowers
Optical properties
Semiconductors

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ijhydene.2014.06.142

Cite this

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title = "Synthesis of novel hollow microflowers (NHMF) of Nb3O 7F, their optical and hydrogen storage properties",

abstract = "A two step, facile surfactant free hydrothermal route was adopted to synthesize Nb3O7F novel hollow microflowers (NHMF). Time dependent experiments were performed which suggested Nb3O 7F-NHMF were formed due to Ostwald-ripening process. Raman spectroscopy was conducted to understand different vibrational modes of Nb 3O7F-NHMF. Its characteristic band at 692 cm-1 was observed which is associated to NbO6 octahedron sharing. The bandgap of 3.2 eV was calculated by using UV-VIS-NIR absorption spectrum. Considering importance of layered structures in energy storage applications, hydrogen storage ability of Nb3O7F-NHMF were measured for the first time. The maximum values of hydrogen absorption for Nb 3O7F-NHMF at 373 K and 473 K were 0.789 wt.% and 1.08 wt.%, respectively. The hydrogen storage measurements revealed the potential of Nb3O7F-NHMF as prospective material for energy storage applications.",

keywords = "Hydrogen storage, Novel microflowers, Optical properties, Semiconductors",

author = "Faryal Idrees and Chuanbao Cao and Butt, {Faheem K.} and Muhammad Tahir and Imran Shakir and Muhammad Rizwan and Imran Aslam and M. Tanveer and Zulfiqar Ali",

year = "2014",

month = aug,

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doi = "10.1016/j.ijhydene.2014.06.142",

language = "English",

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AU - Idrees, Faryal

AU - Cao, Chuanbao

AU - Butt, Faheem K.

AU - Tahir, Muhammad

AU - Shakir, Imran

AU - Rizwan, Muhammad

AU - Aslam, Imran

AU - Tanveer, M.

AU - Ali, Zulfiqar

PY - 2014/8/22

Y1 - 2014/8/22

N2 - A two step, facile surfactant free hydrothermal route was adopted to synthesize Nb3O7F novel hollow microflowers (NHMF). Time dependent experiments were performed which suggested Nb3O 7F-NHMF were formed due to Ostwald-ripening process. Raman spectroscopy was conducted to understand different vibrational modes of Nb 3O7F-NHMF. Its characteristic band at 692 cm-1 was observed which is associated to NbO6 octahedron sharing. The bandgap of 3.2 eV was calculated by using UV-VIS-NIR absorption spectrum. Considering importance of layered structures in energy storage applications, hydrogen storage ability of Nb3O7F-NHMF were measured for the first time. The maximum values of hydrogen absorption for Nb 3O7F-NHMF at 373 K and 473 K were 0.789 wt.% and 1.08 wt.%, respectively. The hydrogen storage measurements revealed the potential of Nb3O7F-NHMF as prospective material for energy storage applications.

AB - A two step, facile surfactant free hydrothermal route was adopted to synthesize Nb3O7F novel hollow microflowers (NHMF). Time dependent experiments were performed which suggested Nb3O 7F-NHMF were formed due to Ostwald-ripening process. Raman spectroscopy was conducted to understand different vibrational modes of Nb 3O7F-NHMF. Its characteristic band at 692 cm-1 was observed which is associated to NbO6 octahedron sharing. The bandgap of 3.2 eV was calculated by using UV-VIS-NIR absorption spectrum. Considering importance of layered structures in energy storage applications, hydrogen storage ability of Nb3O7F-NHMF were measured for the first time. The maximum values of hydrogen absorption for Nb 3O7F-NHMF at 373 K and 473 K were 0.789 wt.% and 1.08 wt.%, respectively. The hydrogen storage measurements revealed the potential of Nb3O7F-NHMF as prospective material for energy storage applications.

KW - Hydrogen storage

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KW - Optical properties

KW - Semiconductors

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