Details
| Original language | English |
|---|---|
| Article number | 121888 |
| Journal | Applied Catalysis B: Environmental |
| Volume | 319 |
| Early online date | 24 Aug 2022 |
| Publication status | Published - 15 Dec 2022 |
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.
Keywords
- Full spectrum response, Oxygen vacancies, Photocatalysis, Plasmonic Bi metal, Synergistic effect
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Environmental Science(all)
- Chemical Engineering(all)
- Process Chemistry and Technology
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In: Applied Catalysis B: Environmental, Vol. 319, 121888, 15.12.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Efficient full spectrum responsive photocatalytic NO conversion at Bi2Ti2O7
T2 - 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
N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (Nos. 21976116, 21902161, 52161145409 ), Shaanxi Science and Technology Program ( 2020KWZ-005 ), SAFEA of China (High-end Foreign Expert Project), Alexander-von-Humboldt Foundation of Germany (Group-Linkage Program). Q.H.Z. acknowledges the support from China Scholarship Council (No. 202108610177 ). R. Hailili gratefully acknowledges the support from the Alexander von Humboldt Foundation . D.W.B. acknowledges financial support from Saint Petersburg State University (Research Grant 39054581 ).
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.
KW - Full spectrum response
KW - Oxygen vacancies
KW - Photocatalysis
KW - Plasmonic Bi metal
KW - Synergistic effect
UR - http://www.scopus.com/inward/record.url?scp=85138525101&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2022.121888
DO - 10.1016/j.apcatb.2022.121888
M3 - Article
AN - SCOPUS:85138525101
VL - 319
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
SN - 0926-3373
M1 - 121888
ER -