CuSZnS1−xOx/g-C3N4 heterostructured photocatalysts for efficient photocatalytic hydrogen production

Chi Jung Chang, Hau-Ting Weng, Chung-Chieh Chang

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

A novel CuSZnS1−xOx/g-C3N4 nanocomposites were prepared by a thermal decomposition process and a hydrothermal method. The effects of the Cu(NO3)2 dopant precursor concentration and weight ratio of g-C3N4/ZnS1−xOx on the morphology, crystalline properties, optical property, photocurrent were investigated by using the field-emission scanning electron microscope (FESEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectra (DRS), photocurrent response, and hydrogen production tests. Decorating CuS improved the absorption of the heterostructured photocatalysts. H2 production rate was increased from 9200 to 10,900 μmol h−1 g−1 by incorporating CuS. By loading 5 wt% g-C3N4 on CuSZnS1−xOx, the maximal hydrogen production rate of the composite catalyst reached 12,200 μmol g−1h−1 under UV light irradiation. Introducing g-C3N4 helps to separate photogenerated electron–hole pairs. After being operated for 3 cycles, the recycled CuSZnS1−xOx/g-C3N4 photocatalyst retained 87% of its original activity.
Original languageEnglish
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusPublished - Jan 2017
Externally publishedYes

Fingerprint

hydrogen production
Photocatalysts
Hydrogen production
Photocurrents
photocurrents
High resolution transmission electron microscopy
Ultraviolet radiation
Field emission
thermal decomposition
field emission
Nanocomposites
nanocomposites
Pyrolysis
x rays
Electron microscopes
X ray photoelectron spectroscopy
Optical properties
electron microscopes
Doping (additives)
photoelectron spectroscopy

Cite this

CuSZnS1−xOx/g-C3N4 heterostructured photocatalysts for efficient photocatalytic hydrogen production. / Chang, Chi Jung; Weng, Hau-Ting; Chang, Chung-Chieh.

In: International Journal of Hydrogen Energy, 01.2017.

Research output: Contribution to journalArticle

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abstract = "A novel CuSZnS1−xOx/g-C3N4 nanocomposites were prepared by a thermal decomposition process and a hydrothermal method. The effects of the Cu(NO3)2 dopant precursor concentration and weight ratio of g-C3N4/ZnS1−xOx on the morphology, crystalline properties, optical property, photocurrent were investigated by using the field-emission scanning electron microscope (FESEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectra (DRS), photocurrent response, and hydrogen production tests. Decorating CuS improved the absorption of the heterostructured photocatalysts. H2 production rate was increased from 9200 to 10,900 μmol h−1 g−1 by incorporating CuS. By loading 5 wt{\%} g-C3N4 on CuSZnS1−xOx, the maximal hydrogen production rate of the composite catalyst reached 12,200 μmol g−1h−1 under UV light irradiation. Introducing g-C3N4 helps to separate photogenerated electron–hole pairs. After being operated for 3 cycles, the recycled CuSZnS1−xOx/g-C3N4 photocatalyst retained 87{\%} of its original activity.",
keywords = "CuS, ZnS1−xOx, g-C3N4, Photocatalyst, Hydrogen production",
author = "Chang, {Chi Jung} and Hau-Ting Weng and Chung-Chieh Chang",
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AB - A novel CuSZnS1−xOx/g-C3N4 nanocomposites were prepared by a thermal decomposition process and a hydrothermal method. The effects of the Cu(NO3)2 dopant precursor concentration and weight ratio of g-C3N4/ZnS1−xOx on the morphology, crystalline properties, optical property, photocurrent were investigated by using the field-emission scanning electron microscope (FESEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectra (DRS), photocurrent response, and hydrogen production tests. Decorating CuS improved the absorption of the heterostructured photocatalysts. H2 production rate was increased from 9200 to 10,900 μmol h−1 g−1 by incorporating CuS. By loading 5 wt% g-C3N4 on CuSZnS1−xOx, the maximal hydrogen production rate of the composite catalyst reached 12,200 μmol g−1h−1 under UV light irradiation. Introducing g-C3N4 helps to separate photogenerated electron–hole pairs. After being operated for 3 cycles, the recycled CuSZnS1−xOx/g-C3N4 photocatalyst retained 87% of its original activity.

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