Mechanochemical synthesis of nanostructured Sr(Ti 1-xFe x)O 3-δ solid-solution powders and their surface photovoltage responses

Xiaofeng Chen; Qiong Luo; Mandi Han; Ooi Kiang Tan; Man Siu Tse; Hui Huang

doi:10.1016/j.jssc.2012.01.012

Mechanochemical synthesis of nanostructured Sr(Ti _1-xFe _x)O _3-δ solid-solution powders and their surface photovoltage responses

Xiaofeng Chen, Qiong Luo, Mandi Han, Ooi Kiang Tan^*, Man Siu Tse, Hui Huang

^*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

A series of nanostructure Sr(Ti _1-xFe _x)O _3-δ (STFx, x=0.4, 0.6, 0.8) solid-solution powders were synthesized by mechanochemical approach milling from the mixture of SrO, Fe ₂O ₃ and TiO ₂ metal oxides at room temperature. The XRD results revealed that the perovskite STFx nanoparticles were finally formed with few residual α-Fe ₂O ₃ detected dependent on the milling conditions. The structure evolution suggested that the mechanochemical synthesis underwent via a solid-state reaction route to initially form Ti-rich perovskite and then incorporate with the residual α-Fe ₂O ₃ to achieve the estimated composition. The synthesized STF08 powders exhibited the significant Surface Photovoltage (SPV) spectrum response both in UV and in visible-light region with p-type semiconductor behavior. This finding suggested that the synthesized STF nanopowders could potentially utilize more solar spectrum energy effectively for photo-oxidation and photo-catalysis applications.

Original language	English
Pages (from-to)	80-84
Number of pages	5
Journal	Journal of Solid State Chemistry
Volume	189
DOIs	https://doi.org/10.1016/j.jssc.2012.01.012
Publication status	Published - May 2012
Externally published	Yes

ASJC Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Keywords

Highenergy ball milling
Kelvin probe
Mechanochemical synthesis
Perovskite oxide
Sr(Ti,Fe)O
Surface photovoltage

Access to Document

10.1016/j.jssc.2012.01.012

Cite this

@article{7879a503e15c4dceb26651ab41a993aa,

title = "Mechanochemical synthesis of nanostructured Sr(Ti 1-xFe x)O 3-δ solid-solution powders and their surface photovoltage responses",

abstract = "A series of nanostructure Sr(Ti 1-xFe x)O 3-δ (STFx, x=0.4, 0.6, 0.8) solid-solution powders were synthesized by mechanochemical approach milling from the mixture of SrO, Fe 2O 3 and TiO 2 metal oxides at room temperature. The XRD results revealed that the perovskite STFx nanoparticles were finally formed with few residual α-Fe 2O 3 detected dependent on the milling conditions. The structure evolution suggested that the mechanochemical synthesis underwent via a solid-state reaction route to initially form Ti-rich perovskite and then incorporate with the residual α-Fe 2O 3 to achieve the estimated composition. The synthesized STF08 powders exhibited the significant Surface Photovoltage (SPV) spectrum response both in UV and in visible-light region with p-type semiconductor behavior. This finding suggested that the synthesized STF nanopowders could potentially utilize more solar spectrum energy effectively for photo-oxidation and photo-catalysis applications.",

keywords = "Highenergy ball milling, Kelvin probe, Mechanochemical synthesis, Perovskite oxide, Sr(Ti,Fe)O, Surface photovoltage",

author = "Xiaofeng Chen and Qiong Luo and Mandi Han and Tan, {Ooi Kiang} and Tse, {Man Siu} and Hui Huang",

year = "2012",

month = may,

doi = "10.1016/j.jssc.2012.01.012",

language = "English",

volume = "189",

pages = "80--84",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Mechanochemical synthesis of nanostructured Sr(Ti 1-xFe x)O 3-δ solid-solution powders and their surface photovoltage responses

AU - Chen, Xiaofeng

AU - Luo, Qiong

AU - Han, Mandi

AU - Tan, Ooi Kiang

AU - Tse, Man Siu

AU - Huang, Hui

PY - 2012/5

Y1 - 2012/5

N2 - A series of nanostructure Sr(Ti 1-xFe x)O 3-δ (STFx, x=0.4, 0.6, 0.8) solid-solution powders were synthesized by mechanochemical approach milling from the mixture of SrO, Fe 2O 3 and TiO 2 metal oxides at room temperature. The XRD results revealed that the perovskite STFx nanoparticles were finally formed with few residual α-Fe 2O 3 detected dependent on the milling conditions. The structure evolution suggested that the mechanochemical synthesis underwent via a solid-state reaction route to initially form Ti-rich perovskite and then incorporate with the residual α-Fe 2O 3 to achieve the estimated composition. The synthesized STF08 powders exhibited the significant Surface Photovoltage (SPV) spectrum response both in UV and in visible-light region with p-type semiconductor behavior. This finding suggested that the synthesized STF nanopowders could potentially utilize more solar spectrum energy effectively for photo-oxidation and photo-catalysis applications.

AB - A series of nanostructure Sr(Ti 1-xFe x)O 3-δ (STFx, x=0.4, 0.6, 0.8) solid-solution powders were synthesized by mechanochemical approach milling from the mixture of SrO, Fe 2O 3 and TiO 2 metal oxides at room temperature. The XRD results revealed that the perovskite STFx nanoparticles were finally formed with few residual α-Fe 2O 3 detected dependent on the milling conditions. The structure evolution suggested that the mechanochemical synthesis underwent via a solid-state reaction route to initially form Ti-rich perovskite and then incorporate with the residual α-Fe 2O 3 to achieve the estimated composition. The synthesized STF08 powders exhibited the significant Surface Photovoltage (SPV) spectrum response both in UV and in visible-light region with p-type semiconductor behavior. This finding suggested that the synthesized STF nanopowders could potentially utilize more solar spectrum energy effectively for photo-oxidation and photo-catalysis applications.

KW - Highenergy ball milling

KW - Kelvin probe

KW - Mechanochemical synthesis

KW - Perovskite oxide

KW - Sr(Ti,Fe)O

KW - Surface photovoltage

UR - http://www.scopus.com/inward/record.url?scp=84862822443&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862822443&partnerID=8YFLogxK

U2 - 10.1016/j.jssc.2012.01.012

DO - 10.1016/j.jssc.2012.01.012

M3 - Article

AN - SCOPUS:84862822443

SN - 0022-4596

VL - 189

SP - 80

EP - 84

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

ER -