Synthesis of mesoporous NiWO4 nanocrystals for enhanced photoelectrochemical water oxidation

M. I. Ahmed; A. Adam; A. Khan; M. N. Siddiqui; Z. H. Yamani; M. Qamar

doi:10.1016/j.matlet.2016.04.143

Synthesis of mesoporous NiWO₄ nanocrystals for enhanced photoelectrochemical water oxidation

M. I. Ahmed
, A. Adam
, A. Khan
, M. N. Siddiqui
, Z. H. Yamani
, M. Qamar^*

^*Corresponding author for this work

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

47 Scopus citations

Abstract

Nanocrystalline mesoporous nickel tungstate (m-NiWO₄) was synthesized via surfactant assisted hydrothermal templating technique. TEM, HRTEM and N₂ sorption analysis verified the presence of mesoporous textured surface. These nanocrystals were near-spherical in shape with the size variation between 4 and 8 nm, and possessed high surface area (79 m² g^-1). The nanocrystals were in monoclinic (wolframite structure) symmetry and possessed a band gap of 2.6 eV as shown by the XRD and optical measurements. The m-NiWO₄ exhibited much better photoelectrochemical H₂O oxidation than TiO₂ and non-mesoporous NiWO₄ nanocrystals due to the enhanced crystallinity, surface morphology and mesoporosity.

Original language	English
Pages (from-to)	135-138
Number of pages	4
Journal	Materials Letters
Volume	177
DOIs	https://doi.org/10.1016/j.matlet.2016.04.143
State	Published - 15 Aug 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.

Keywords

Mesoporous
Nanocrystalline
NiWO
Photoelectrochemical oxidation

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.matlet.2016.04.143

Cite this

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title = "Synthesis of mesoporous NiWO4 nanocrystals for enhanced photoelectrochemical water oxidation",

abstract = "Nanocrystalline mesoporous nickel tungstate (m-NiWO4) was synthesized via surfactant assisted hydrothermal templating technique. TEM, HRTEM and N2 sorption analysis verified the presence of mesoporous textured surface. These nanocrystals were near-spherical in shape with the size variation between 4 and 8 nm, and possessed high surface area (79 m2 g-1). The nanocrystals were in monoclinic (wolframite structure) symmetry and possessed a band gap of 2.6 eV as shown by the XRD and optical measurements. The m-NiWO4 exhibited much better photoelectrochemical H2O oxidation than TiO2 and non-mesoporous NiWO4 nanocrystals due to the enhanced crystallinity, surface morphology and mesoporosity.",

keywords = "Mesoporous, Nanocrystalline, NiWO, Photoelectrochemical oxidation",

author = "Ahmed, \{M. I.\} and A. Adam and A. Khan and Siddiqui, \{M. N.\} and Yamani, \{Z. H.\} and M. Qamar",

year = "2016",

month = aug,

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doi = "10.1016/j.matlet.2016.04.143",

language = "English",

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journal = "Materials Letters",

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TY - JOUR

T1 - Synthesis of mesoporous NiWO4 nanocrystals for enhanced photoelectrochemical water oxidation

AU - Ahmed, M. I.

AU - Adam, A.

AU - Khan, A.

AU - Siddiqui, M. N.

AU - Yamani, Z. H.

AU - Qamar, M.

PY - 2016/8/15

Y1 - 2016/8/15

N2 - Nanocrystalline mesoporous nickel tungstate (m-NiWO4) was synthesized via surfactant assisted hydrothermal templating technique. TEM, HRTEM and N2 sorption analysis verified the presence of mesoporous textured surface. These nanocrystals were near-spherical in shape with the size variation between 4 and 8 nm, and possessed high surface area (79 m2 g-1). The nanocrystals were in monoclinic (wolframite structure) symmetry and possessed a band gap of 2.6 eV as shown by the XRD and optical measurements. The m-NiWO4 exhibited much better photoelectrochemical H2O oxidation than TiO2 and non-mesoporous NiWO4 nanocrystals due to the enhanced crystallinity, surface morphology and mesoporosity.

AB - Nanocrystalline mesoporous nickel tungstate (m-NiWO4) was synthesized via surfactant assisted hydrothermal templating technique. TEM, HRTEM and N2 sorption analysis verified the presence of mesoporous textured surface. These nanocrystals were near-spherical in shape with the size variation between 4 and 8 nm, and possessed high surface area (79 m2 g-1). The nanocrystals were in monoclinic (wolframite structure) symmetry and possessed a band gap of 2.6 eV as shown by the XRD and optical measurements. The m-NiWO4 exhibited much better photoelectrochemical H2O oxidation than TiO2 and non-mesoporous NiWO4 nanocrystals due to the enhanced crystallinity, surface morphology and mesoporosity.

KW - Mesoporous

KW - Nanocrystalline

KW - NiWO

KW - Photoelectrochemical oxidation

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U2 - 10.1016/j.matlet.2016.04.143

DO - 10.1016/j.matlet.2016.04.143

M3 - Article

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JF - Materials Letters

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