Heterojunction photocatalyst TiO2/AgGaS2 for hydrogen production from water under visible light

Jum Suk Jang; Suk Jun Hong; Jae Yul Kim; Jae Sung Lee

doi:10.1016/j.cplett.2009.05.012

Heterojunction photocatalyst TiO₂/AgGaS₂ for hydrogen production from water under visible light

Jum Suk Jang
, Suk Jun Hong
, Jae Yul Kim
, Jae Sung Lee^*

^*Corresponding author for this work

Environmental Biotechnology

Pohang University of Science and Technology

Research output: Contribution to journal › Journal article › peer-review

34 Scopus citations

Abstract

A heterojunction photocatalyst TiO₂/AgGaS₂ consisting of bulky AgGaS₂ with high crystallinity decorated with nanosized TiO₂ particles was successfully fabricated by solid state reaction and sol-gel synthesis. TiO₂ itself was inactive under visible light, but its combination with AgGaS₂ improved greatly the rate of hydrogen production of AgGaS₂ from water containing Na₂S/Na₂SO₃ as sacrificial reagents under visible light irradiation. The fabrication method of the heterojunction photocatalysts was critical for their performance. This configuration of photocatalyst results in an efficient charge separation at the interface, followed by fast diffusion of photoelectrons generated in AgGaS₂ towards surrounding TiO₂ leading to high photocatalytic activity of hydrogen production.

Original language	English
Pages (from-to)	78-81
Number of pages	4
Journal	Chemical Physics Letters
Volume	475
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2009.05.012
State	Published - 2009.06.16

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10.1016/j.cplett.2009.05.012

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title = "Heterojunction photocatalyst TiO2/AgGaS2 for hydrogen production from water under visible light",

abstract = "A heterojunction photocatalyst TiO2/AgGaS2 consisting of bulky AgGaS2 with high crystallinity decorated with nanosized TiO2 particles was successfully fabricated by solid state reaction and sol-gel synthesis. TiO2 itself was inactive under visible light, but its combination with AgGaS2 improved greatly the rate of hydrogen production of AgGaS2 from water containing Na2S/Na2SO3 as sacrificial reagents under visible light irradiation. The fabrication method of the heterojunction photocatalysts was critical for their performance. This configuration of photocatalyst results in an efficient charge separation at the interface, followed by fast diffusion of photoelectrons generated in AgGaS2 towards surrounding TiO2 leading to high photocatalytic activity of hydrogen production.",

author = "Jang, \{Jum Suk\} and Hong, \{Suk Jun\} and Kim, \{Jae Yul\} and Lee, \{Jae Sung\}",

year = "2009",

month = jun,

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doi = "10.1016/j.cplett.2009.05.012",

language = "English",

volume = "475",

pages = "78--81",

journal = "Chemical Physics Letters",

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T1 - Heterojunction photocatalyst TiO2/AgGaS2 for hydrogen production from water under visible light

AU - Jang, Jum Suk

AU - Hong, Suk Jun

AU - Kim, Jae Yul

AU - Lee, Jae Sung

PY - 2009/6/16

Y1 - 2009/6/16

N2 - A heterojunction photocatalyst TiO2/AgGaS2 consisting of bulky AgGaS2 with high crystallinity decorated with nanosized TiO2 particles was successfully fabricated by solid state reaction and sol-gel synthesis. TiO2 itself was inactive under visible light, but its combination with AgGaS2 improved greatly the rate of hydrogen production of AgGaS2 from water containing Na2S/Na2SO3 as sacrificial reagents under visible light irradiation. The fabrication method of the heterojunction photocatalysts was critical for their performance. This configuration of photocatalyst results in an efficient charge separation at the interface, followed by fast diffusion of photoelectrons generated in AgGaS2 towards surrounding TiO2 leading to high photocatalytic activity of hydrogen production.

AB - A heterojunction photocatalyst TiO2/AgGaS2 consisting of bulky AgGaS2 with high crystallinity decorated with nanosized TiO2 particles was successfully fabricated by solid state reaction and sol-gel synthesis. TiO2 itself was inactive under visible light, but its combination with AgGaS2 improved greatly the rate of hydrogen production of AgGaS2 from water containing Na2S/Na2SO3 as sacrificial reagents under visible light irradiation. The fabrication method of the heterojunction photocatalysts was critical for their performance. This configuration of photocatalyst results in an efficient charge separation at the interface, followed by fast diffusion of photoelectrons generated in AgGaS2 towards surrounding TiO2 leading to high photocatalytic activity of hydrogen production.

UR - https://www.scopus.com/pages/publications/66349125866

U2 - 10.1016/j.cplett.2009.05.012

DO - 10.1016/j.cplett.2009.05.012

M3 - Journal article

AN - SCOPUS:66349125866

SN - 0009-2614

VL - 475

SP - 78

EP - 81

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-3

ER -

Heterojunction photocatalyst TiO₂/AgGaS₂ for hydrogen production from water under visible light

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