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Indium induced band gap tailoring in chalcopyrite structure for visible light photocatalysis
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10.1063/1.2900984
/content/aip/journal/jcp/128/15/10.1063/1.2900984
http://aip.metastore.ingenta.com/content/aip/journal/jcp/128/15/10.1063/1.2900984
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

X-ray diffraction patterns of photocatalyst for (a), 0.1 (b), 0.25 (c), 0.5 (d), 0.75 (e), and 1.0 (f), along with the JCPDS data of and .

Image of FIG. 2.
FIG. 2.

(A) UV-visible, diffuse reflectance spectra of photocatalyst for (a), 0.1 (b), 0.25 (c), 0.5 (d), 0.75 (e), and 1.0 (f). The inset shows colors of respective samples, (B) The graph of indium concentration in versus the measured band gap energy.

Image of FIG. 3.
FIG. 3.

The morphology of (a) and (b) examined by SEM.

Image of FIG. 4.
FIG. 4.

The XPS core-level spectra of (A) Ga , (B) In in samples. The respective value of for (A) Ga as (a) 0.0, (b) 0.1, (c) 0.25, (d) 0.5, and (e) 0.75 and (B) In as (a) 0.1, (b) 0.25, (c) 0.5, and (d) 0.75.

Image of FIG. 5.
FIG. 5.

Ga -edge XANES spectra of respective samples for , 0.1, 0.25, and 0.5.

Image of FIG. 6.
FIG. 6.

(A) Theoretically calculated Ga -edge XANES spectra of (a) in its own lattice, (b) without the second shell of Ga—M (, Ga, or In), and (c) in lattice. (B) Theoretically calculated In -edge XANES spectrum of .

Image of FIG. 7.
FIG. 7.

Imaginary functions of Fourier-transformed for respective samples with , 0.1, 0.25, and 0.5.

Image of FIG. 8.
FIG. 8.

Theoretically calculated total density of states (DOS) for and . The top of the valence band was set to . The inset shows the finer details near respective band gaps.

Image of FIG. 9.
FIG. 9.

The average rate of evolution over [ (a), 0.1 (b), 0.25 (c), 0.5 (d), 0.75 (e), and 1.0 (f)] from an electrolyte solution containing and under visible light irradiation. Catalysts: loaded Pt, Light source: Hg-arc lamp , equipped with IR liquid filter and with UV cut-off filter . The inset shows the time course of production on Pt-loaded samples [ (a) and 0.1 (b)] under visible light illumination. Catalysts: loaded Pt; electrolyte: , Light source: Hg-arc lamp equipped with IR liquid filter and with UV cut-off filter .

Image of FIG. 10.
FIG. 10.

Proposed schematic band structures for , , and .

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/content/aip/journal/jcp/128/15/10.1063/1.2900984
2008-04-21
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Indium induced band gap tailoring in AgGa1−xInxS2 chalcopyrite structure for visible light photocatalysis
http://aip.metastore.ingenta.com/content/aip/journal/jcp/128/15/10.1063/1.2900984
10.1063/1.2900984
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