Synthesis of copper hydroxide and oxide nanostructures via anodization technique for efficient photocatalytic application

Rajeshkumar Shankar Hyam, Jongseok Lee, Eunju Cho, Jeehyeong Khim, Haigun Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have demonstrated a facile protocol for synthesizing CuO and Cu 2O mixed-phase nanostructures by anodization of copper hydroxide (Cu(OH)2) nanoneedles and their heat treatment in different atmospheres, which affect photocatalytic degradation efficiency. The oxygen annealed sample had relatively small (100 nm) lamellar, spherical nanoparticulate structures on the substrate surface, which showed better photocatalytic degradation of reactive black 5 dye resulting from the appropriate morphology and phase formation, compared to the samples annealed in different atmospheres and vacuum. The pseudo first-order rate constant (k) of the oxygen annealed sample was 0.0054/min, which was relatively high due to the formation of a CuO-Cu2O heterojunction with matching band potentials. Air, nitrogen, argon and vacuum annealing resulted in bigger particles and different morphologies, which led to pseudo first-order rate constants (k) of 0.0032/min (air-annealed); 0.0021/min (N2-annealed); 0.0033/min (Ar-annealed); and 0.0027/min (vacuum-annealed), which resulted in poor photocatalytic degradation of the reactive black 5 dye.

Original languageEnglish
Pages (from-to)8396-8400
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume12
Issue number11
DOIs
Publication statusPublished - 2012 Nov 1

Fingerprint

Remazol black B
Nanostructures
Vacuum
Oxides
hydroxides
degradation
Copper
Atmosphere
Degradation
copper
vacuum
oxides
Rate constants
Coloring Agents
synthesis
Dyes
dyes
Air
Nanoneedles
Oxygen

Keywords

  • Copper hydroxide
  • Copper oxide nanoneedles
  • Photocatalysis
  • Surface defect

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

Cite this

Synthesis of copper hydroxide and oxide nanostructures via anodization technique for efficient photocatalytic application. / Hyam, Rajeshkumar Shankar; Lee, Jongseok; Cho, Eunju; Khim, Jeehyeong; Lee, Haigun.

In: Journal of Nanoscience and Nanotechnology, Vol. 12, No. 11, 01.11.2012, p. 8396-8400.

Research output: Contribution to journalArticle

@article{071b83c70a5841509c08adcca7d5e82f,
title = "Synthesis of copper hydroxide and oxide nanostructures via anodization technique for efficient photocatalytic application",
abstract = "We have demonstrated a facile protocol for synthesizing CuO and Cu 2O mixed-phase nanostructures by anodization of copper hydroxide (Cu(OH)2) nanoneedles and their heat treatment in different atmospheres, which affect photocatalytic degradation efficiency. The oxygen annealed sample had relatively small (100 nm) lamellar, spherical nanoparticulate structures on the substrate surface, which showed better photocatalytic degradation of reactive black 5 dye resulting from the appropriate morphology and phase formation, compared to the samples annealed in different atmospheres and vacuum. The pseudo first-order rate constant (k) of the oxygen annealed sample was 0.0054/min, which was relatively high due to the formation of a CuO-Cu2O heterojunction with matching band potentials. Air, nitrogen, argon and vacuum annealing resulted in bigger particles and different morphologies, which led to pseudo first-order rate constants (k) of 0.0032/min (air-annealed); 0.0021/min (N2-annealed); 0.0033/min (Ar-annealed); and 0.0027/min (vacuum-annealed), which resulted in poor photocatalytic degradation of the reactive black 5 dye.",
keywords = "Copper hydroxide, Copper oxide nanoneedles, Photocatalysis, Surface defect",
author = "Hyam, {Rajeshkumar Shankar} and Jongseok Lee and Eunju Cho and Jeehyeong Khim and Haigun Lee",
year = "2012",
month = "11",
day = "1",
doi = "10.1166/jnn.2012.6673",
language = "English",
volume = "12",
pages = "8396--8400",
journal = "Journal of Nanoscience and Nanotechnology",
issn = "1533-4880",
publisher = "American Scientific Publishers",
number = "11",

}

TY - JOUR

T1 - Synthesis of copper hydroxide and oxide nanostructures via anodization technique for efficient photocatalytic application

AU - Hyam, Rajeshkumar Shankar

AU - Lee, Jongseok

AU - Cho, Eunju

AU - Khim, Jeehyeong

AU - Lee, Haigun

PY - 2012/11/1

Y1 - 2012/11/1

N2 - We have demonstrated a facile protocol for synthesizing CuO and Cu 2O mixed-phase nanostructures by anodization of copper hydroxide (Cu(OH)2) nanoneedles and their heat treatment in different atmospheres, which affect photocatalytic degradation efficiency. The oxygen annealed sample had relatively small (100 nm) lamellar, spherical nanoparticulate structures on the substrate surface, which showed better photocatalytic degradation of reactive black 5 dye resulting from the appropriate morphology and phase formation, compared to the samples annealed in different atmospheres and vacuum. The pseudo first-order rate constant (k) of the oxygen annealed sample was 0.0054/min, which was relatively high due to the formation of a CuO-Cu2O heterojunction with matching band potentials. Air, nitrogen, argon and vacuum annealing resulted in bigger particles and different morphologies, which led to pseudo first-order rate constants (k) of 0.0032/min (air-annealed); 0.0021/min (N2-annealed); 0.0033/min (Ar-annealed); and 0.0027/min (vacuum-annealed), which resulted in poor photocatalytic degradation of the reactive black 5 dye.

AB - We have demonstrated a facile protocol for synthesizing CuO and Cu 2O mixed-phase nanostructures by anodization of copper hydroxide (Cu(OH)2) nanoneedles and their heat treatment in different atmospheres, which affect photocatalytic degradation efficiency. The oxygen annealed sample had relatively small (100 nm) lamellar, spherical nanoparticulate structures on the substrate surface, which showed better photocatalytic degradation of reactive black 5 dye resulting from the appropriate morphology and phase formation, compared to the samples annealed in different atmospheres and vacuum. The pseudo first-order rate constant (k) of the oxygen annealed sample was 0.0054/min, which was relatively high due to the formation of a CuO-Cu2O heterojunction with matching band potentials. Air, nitrogen, argon and vacuum annealing resulted in bigger particles and different morphologies, which led to pseudo first-order rate constants (k) of 0.0032/min (air-annealed); 0.0021/min (N2-annealed); 0.0033/min (Ar-annealed); and 0.0027/min (vacuum-annealed), which resulted in poor photocatalytic degradation of the reactive black 5 dye.

KW - Copper hydroxide

KW - Copper oxide nanoneedles

KW - Photocatalysis

KW - Surface defect

UR - http://www.scopus.com/inward/record.url?scp=84871917469&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84871917469&partnerID=8YFLogxK

U2 - 10.1166/jnn.2012.6673

DO - 10.1166/jnn.2012.6673

M3 - Article

C2 - 23421221

AN - SCOPUS:84871917469

VL - 12

SP - 8396

EP - 8400

JO - Journal of Nanoscience and Nanotechnology

JF - Journal of Nanoscience and Nanotechnology

SN - 1533-4880

IS - 11

ER -