Growth and optical band gap of CdAl-layered double hydroxide thin structures on rigid substrate

Deok Ki Cho; Chan Woo Jeon; Il Kyu Park

doi:10.1016/j.jallcom.2017.12.163

Growth and optical band gap of CdAl-layered double hydroxide thin structures on rigid substrate

Deok Ki Cho, Chan Woo Jeon, Il Kyu Park

Dept. of Materials Science & Engineering

Seoul National University of Science and Technology (SNUST)

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

24 Scopus citations

Abstract

We report the optical and chemical properties of a CdAl-layered double hydroxide (LDH) grown by a low-temperature hydrothermal method on rigid substrates. Structural and chemical investigations showed that the CdAl-LDH structures were formed as the source concentration was increased up to 45 mM. Mixed phases of CdO, Cd(OH)₂, and CdAl-LDH structures were formed when the source concentration was less than 30 mM. X-ray photoelectron spectroscopy indicated that the Cd and Al metal ions were present in the LDHs as divalent and trivalent ionic states, respectively. Optical investigations by UV–vis spectroscopy indicated that the CdAl-LDH had a direct band gap structure with an energy band gap of 3.01 eV.

Original language	English
Pages (from-to)	725-730
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	737
DOIs	https://doi.org/10.1016/j.jallcom.2017.12.163
State	Published - 15 Mar 2018

Keywords

Band gap energy
CdAl-Layered double hydroxide
Hydrothermal growth
UV–Vis spectroscopy

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10.1016/j.jallcom.2017.12.163

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title = "Growth and optical band gap of CdAl-layered double hydroxide thin structures on rigid substrate",

abstract = "We report the optical and chemical properties of a CdAl-layered double hydroxide (LDH) grown by a low-temperature hydrothermal method on rigid substrates. Structural and chemical investigations showed that the CdAl-LDH structures were formed as the source concentration was increased up to 45 mM. Mixed phases of CdO, Cd(OH)2, and CdAl-LDH structures were formed when the source concentration was less than 30 mM. X-ray photoelectron spectroscopy indicated that the Cd and Al metal ions were present in the LDHs as divalent and trivalent ionic states, respectively. Optical investigations by UV–vis spectroscopy indicated that the CdAl-LDH had a direct band gap structure with an energy band gap of 3.01 eV.",

keywords = "Band gap energy, CdAl-Layered double hydroxide, Hydrothermal growth, UV–Vis spectroscopy",

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AU - Cho, Deok Ki

AU - Jeon, Chan Woo

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N2 - We report the optical and chemical properties of a CdAl-layered double hydroxide (LDH) grown by a low-temperature hydrothermal method on rigid substrates. Structural and chemical investigations showed that the CdAl-LDH structures were formed as the source concentration was increased up to 45 mM. Mixed phases of CdO, Cd(OH)2, and CdAl-LDH structures were formed when the source concentration was less than 30 mM. X-ray photoelectron spectroscopy indicated that the Cd and Al metal ions were present in the LDHs as divalent and trivalent ionic states, respectively. Optical investigations by UV–vis spectroscopy indicated that the CdAl-LDH had a direct band gap structure with an energy band gap of 3.01 eV.

AB - We report the optical and chemical properties of a CdAl-layered double hydroxide (LDH) grown by a low-temperature hydrothermal method on rigid substrates. Structural and chemical investigations showed that the CdAl-LDH structures were formed as the source concentration was increased up to 45 mM. Mixed phases of CdO, Cd(OH)2, and CdAl-LDH structures were formed when the source concentration was less than 30 mM. X-ray photoelectron spectroscopy indicated that the Cd and Al metal ions were present in the LDHs as divalent and trivalent ionic states, respectively. Optical investigations by UV–vis spectroscopy indicated that the CdAl-LDH had a direct band gap structure with an energy band gap of 3.01 eV.

KW - Band gap energy

KW - CdAl-Layered double hydroxide

KW - Hydrothermal growth

KW - UV–Vis spectroscopy

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Growth and optical band gap of CdAl-layered double hydroxide thin structures on rigid substrate

Abstract

Keywords

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