Efficient full spectrum responsive photocatalytic NO conversion at Bi2Ti2O7: Co-effect of plasmonic Bi and oxygen vacancies

Qiuhui Zhu; Reshalaiti Hailili; Yue Xin; Yingtang Zhou; Yu Huang; Xinzhu Pang; Ke Zhang; Peter K.J. Robertson; Detlef W. Bahnemann; Chuanyi Wang

doi:10.1016/j.apcatb.2022.121888

Efficient full spectrum responsive photocatalytic NO conversion at Bi2Ti2O7: Co-effect of plasmonic Bi and oxygen vacancies

Qiuhui Zhu, Reshalaiti Hailili^*, Yue Xin, Yingtang Zhou^*, Yu Huang, Xinzhu Pang, Ke Zhang, Peter K.J. Robertson, Detlef W. Bahnemann, Chuanyi Wang^*

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

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

100 Citations (Scopus)

Abstract

Developing full-spectrum responsive and efficient photocatalysts is still an important challenge in the field of photocatalytic treatment of trace environmental pollutants. Herein, full-spectrum Bi@Bi2Ti2O7 with rich-oxygen vacancies (OVs) were fabricated via a one-pot hydrothermal method. The optimized composite photocatalyst exhibited a photocatalytic efficiency of 79 %, more than doubled higher than that of its counterpart, Bi2Ti2O7 (31.79 %), for removing ppb-level NO under visible-near infrared (Vis-NIR) irradiation. The enhanced photocatalytic performance was attributed to the co-effect of Bi and OVs reveal by control experiments and theoretical calculations, which not only benefited the adsorption and photocatalytic activation of NO but broadened light absorption to near infrared region. Furthermore, the adsorption and photocatalytic conversion pathway of NO was explored by in situ DRIFTS, suggesting that NO+ as intermediate species is crucial to improve the selectivity of NO converting to nitrate. This work provides a new perspective of constructing full-spectrum-driven photocatalysts for environment remediation.

Original language	English
Article number	121888
Journal	Applied Catalysis B: Environment and Energy
Volume	319
Early online date	30 Aug 2022
DOIs	https://doi.org/10.1016/j.apcatb.2022.121888
Publication status	Published - 15 Dec 2022

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Investigation of photocatalytic generation of reactive oxygen species for the degradation of phthalates in water
Pang, X. (Author), Rooney, D. (Supervisor) & Robertson, P. (Supervisor), Dec 2022
Student thesis: Doctoral Thesis › Doctor of Philosophy

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title = "Efficient full spectrum responsive photocatalytic NO conversion at Bi2Ti2O7: Co-effect of plasmonic Bi and oxygen vacancies",

abstract = "Developing full-spectrum responsive and efficient photocatalysts is still an important challenge in the field of photocatalytic treatment of trace environmental pollutants. Herein, full-spectrum Bi@Bi2Ti2O7 with rich-oxygen vacancies (OVs) were fabricated via a one-pot hydrothermal method. The optimized composite photocatalyst exhibited a photocatalytic efficiency of 79 %, more than doubled higher than that of its counterpart, Bi2Ti2O7 (31.79 %), for removing ppb-level NO under visible-near infrared (Vis-NIR) irradiation. The enhanced photocatalytic performance was attributed to the co-effect of Bi and OVs reveal by control experiments and theoretical calculations, which not only benefited the adsorption and photocatalytic activation of NO but broadened light absorption to near infrared region. Furthermore, the adsorption and photocatalytic conversion pathway of NO was explored by in situ DRIFTS, suggesting that NO+ as intermediate species is crucial to improve the selectivity of NO converting to nitrate. This work provides a new perspective of constructing full-spectrum-driven photocatalysts for environment remediation.",

author = "Qiuhui Zhu and Reshalaiti Hailili and Yue Xin and Yingtang Zhou and Yu Huang and Xinzhu Pang and Ke Zhang and Robertson, {Peter K.J.} and Bahnemann, {Detlef W.} and Chuanyi Wang",

year = "2022",

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day = "15",

doi = "10.1016/j.apcatb.2022.121888",

language = "English",

volume = "319",

journal = "Applied Catalysis B: Environment and Energy",

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T1 - Efficient full spectrum responsive photocatalytic NO conversion at Bi2Ti2O7: Co-effect of plasmonic Bi and oxygen vacancies

AU - Zhu, Qiuhui

AU - Hailili, Reshalaiti

AU - Xin, Yue

AU - Zhou, Yingtang

AU - Huang, Yu

AU - Pang, Xinzhu

AU - Zhang, Ke

AU - Robertson, Peter K.J.

AU - Bahnemann, Detlef W.

AU - Wang, Chuanyi

PY - 2022/12/15

Y1 - 2022/12/15

N2 - Developing full-spectrum responsive and efficient photocatalysts is still an important challenge in the field of photocatalytic treatment of trace environmental pollutants. Herein, full-spectrum Bi@Bi2Ti2O7 with rich-oxygen vacancies (OVs) were fabricated via a one-pot hydrothermal method. The optimized composite photocatalyst exhibited a photocatalytic efficiency of 79 %, more than doubled higher than that of its counterpart, Bi2Ti2O7 (31.79 %), for removing ppb-level NO under visible-near infrared (Vis-NIR) irradiation. The enhanced photocatalytic performance was attributed to the co-effect of Bi and OVs reveal by control experiments and theoretical calculations, which not only benefited the adsorption and photocatalytic activation of NO but broadened light absorption to near infrared region. Furthermore, the adsorption and photocatalytic conversion pathway of NO was explored by in situ DRIFTS, suggesting that NO+ as intermediate species is crucial to improve the selectivity of NO converting to nitrate. This work provides a new perspective of constructing full-spectrum-driven photocatalysts for environment remediation.

AB - Developing full-spectrum responsive and efficient photocatalysts is still an important challenge in the field of photocatalytic treatment of trace environmental pollutants. Herein, full-spectrum Bi@Bi2Ti2O7 with rich-oxygen vacancies (OVs) were fabricated via a one-pot hydrothermal method. The optimized composite photocatalyst exhibited a photocatalytic efficiency of 79 %, more than doubled higher than that of its counterpart, Bi2Ti2O7 (31.79 %), for removing ppb-level NO under visible-near infrared (Vis-NIR) irradiation. The enhanced photocatalytic performance was attributed to the co-effect of Bi and OVs reveal by control experiments and theoretical calculations, which not only benefited the adsorption and photocatalytic activation of NO but broadened light absorption to near infrared region. Furthermore, the adsorption and photocatalytic conversion pathway of NO was explored by in situ DRIFTS, suggesting that NO+ as intermediate species is crucial to improve the selectivity of NO converting to nitrate. This work provides a new perspective of constructing full-spectrum-driven photocatalysts for environment remediation.

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DO - 10.1016/j.apcatb.2022.121888

M3 - Article

SN - 0926-3373

VL - 319

JO - Applied Catalysis B: Environment and Energy

JF - Applied Catalysis B: Environment and Energy

M1 - 121888

ER -

Efficient full spectrum responsive photocatalytic NO conversion at Bi2Ti2O7: Co-effect of plasmonic Bi and oxygen vacancies

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Student theses

Investigation of photocatalytic generation of reactive oxygen species for the degradation of phthalates in water

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