A new oxynitride-based solid state Z-scheme photocatalytic system for efficient Cr(VI) reduction and water oxidation

Yansong Zhou; Gang Chen; Yaoguang Yu; Lichen Zhao; Jingxue Sun; Fang He; Hongjun Dong

doi:10.1016/j.apcatb.2015.10.040

A new oxynitride-based solid state Z-scheme photocatalytic system for efficient Cr(VI) reduction and water oxidation

Yansong Zhou
, Gang Chen^*
, Yaoguang Yu
, Lichen Zhao
, Jingxue Sun
, Fang He
, Hongjun Dong

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Harbin Institute of Technology

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

41 Scopus citations

Abstract

Achieving ideal photocatalytic systems by mimicking Z-scheme mechanism in natural photosynthesis results in highly efficient artificial photosynthesis. A new oxynitride-based solid state Z-scheme photocatalytic system containing (GaxZn1_-x)(NxO1_-x) and Nb_3.49N_4.56O_0.44 was constructed. Nb_3.49N_4.56O_0.44/(GaxZn1_-x)(NxO1_-x)(6.0) exhibits the highest rate for complete reduction of Cr(VI) within 30 min under simulated sunlight irradiation as well as extremely high apparent quantum efficiency of 68% at 350 nm 24.4% at 420 nm for photocatalytic water oxidation. A similar solid state Z-scheme photocatalytic system was also obtained when compositing Nb_3.49N_4.56O_0.44 with TaON. It's expected that Nb_3.49N_4.56O_0.44 can also be composed with other oxynitride semiconductor to construct more oxynitride-based solid state Z-scheme photocatalytic systems.

Original language	English
Pages (from-to)	176-184
Number of pages	9
Journal	Applied Catalysis B: Environmental
Volume	183
DOIs	https://doi.org/10.1016/j.apcatb.2015.10.040
State	Published - Apr 2016

Keywords

Energy conversion
Oxynitride semiconductors
Photocatalysis
Solid-state
Z-scheme

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10.1016/j.apcatb.2015.10.040

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@article{d314cae0d927415bafeab3c54038159c,

title = "A new oxynitride-based solid state Z-scheme photocatalytic system for efficient Cr(VI) reduction and water oxidation",

abstract = "Achieving ideal photocatalytic systems by mimicking Z-scheme mechanism in natural photosynthesis results in highly efficient artificial photosynthesis. A new oxynitride-based solid state Z-scheme photocatalytic system containing (GaxZn1-x)(NxO1-x) and Nb3.49N4.56O0.44 was constructed. Nb3.49N4.56O0.44/(GaxZn1-x)(NxO1-x)(6.0) exhibits the highest rate for complete reduction of Cr(VI) within 30 min under simulated sunlight irradiation as well as extremely high apparent quantum efficiency of 68\% at 350 nm 24.4\% at 420 nm for photocatalytic water oxidation. A similar solid state Z-scheme photocatalytic system was also obtained when compositing Nb3.49N4.56O0.44 with TaON. It's expected that Nb3.49N4.56O0.44 can also be composed with other oxynitride semiconductor to construct more oxynitride-based solid state Z-scheme photocatalytic systems.",

keywords = "Energy conversion, Oxynitride semiconductors, Photocatalysis, Solid-state, Z-scheme",

author = "Yansong Zhou and Gang Chen and Yaoguang Yu and Lichen Zhao and Jingxue Sun and Fang He and Hongjun Dong",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2016",

month = apr,

doi = "10.1016/j.apcatb.2015.10.040",

language = "英语",

volume = "183",

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journal = "Applied Catalysis B: Environmental",

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T1 - A new oxynitride-based solid state Z-scheme photocatalytic system for efficient Cr(VI) reduction and water oxidation

AU - Zhou, Yansong

AU - Chen, Gang

AU - Yu, Yaoguang

AU - Zhao, Lichen

AU - Sun, Jingxue

AU - He, Fang

AU - Dong, Hongjun

PY - 2016/4

Y1 - 2016/4

N2 - Achieving ideal photocatalytic systems by mimicking Z-scheme mechanism in natural photosynthesis results in highly efficient artificial photosynthesis. A new oxynitride-based solid state Z-scheme photocatalytic system containing (GaxZn1-x)(NxO1-x) and Nb3.49N4.56O0.44 was constructed. Nb3.49N4.56O0.44/(GaxZn1-x)(NxO1-x)(6.0) exhibits the highest rate for complete reduction of Cr(VI) within 30 min under simulated sunlight irradiation as well as extremely high apparent quantum efficiency of 68% at 350 nm 24.4% at 420 nm for photocatalytic water oxidation. A similar solid state Z-scheme photocatalytic system was also obtained when compositing Nb3.49N4.56O0.44 with TaON. It's expected that Nb3.49N4.56O0.44 can also be composed with other oxynitride semiconductor to construct more oxynitride-based solid state Z-scheme photocatalytic systems.

AB - Achieving ideal photocatalytic systems by mimicking Z-scheme mechanism in natural photosynthesis results in highly efficient artificial photosynthesis. A new oxynitride-based solid state Z-scheme photocatalytic system containing (GaxZn1-x)(NxO1-x) and Nb3.49N4.56O0.44 was constructed. Nb3.49N4.56O0.44/(GaxZn1-x)(NxO1-x)(6.0) exhibits the highest rate for complete reduction of Cr(VI) within 30 min under simulated sunlight irradiation as well as extremely high apparent quantum efficiency of 68% at 350 nm 24.4% at 420 nm for photocatalytic water oxidation. A similar solid state Z-scheme photocatalytic system was also obtained when compositing Nb3.49N4.56O0.44 with TaON. It's expected that Nb3.49N4.56O0.44 can also be composed with other oxynitride semiconductor to construct more oxynitride-based solid state Z-scheme photocatalytic systems.

KW - Energy conversion

KW - Oxynitride semiconductors

KW - Photocatalysis

KW - Solid-state

KW - Z-scheme

UR - https://www.scopus.com/pages/publications/85015977591

U2 - 10.1016/j.apcatb.2015.10.040

DO - 10.1016/j.apcatb.2015.10.040

M3 - 文章

AN - SCOPUS:85015977591

SN - 0926-3373

VL - 183

SP - 176

EP - 184

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

ER -

A new oxynitride-based solid state Z-scheme photocatalytic system for efficient Cr(VI) reduction and water oxidation

Abstract

Keywords

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