Oxygen Vacancies Promoted the Selective Photocatalytic Removal of NO with Blue TiO<sub>2</sub> via Simultaneous Molecular Oxygen Activation and Photogenerated Hole Annihilation

Shang, Hai; Li, Meiqi; Li, Hao; Huang, S. Y.; Mao, Chengliang; Ai, Zhihui; Zhang, Lizhi

doi:10.1021/acs.est.8b07322

Cited by 241 publications

(102 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The production of Ti 3+ due to the incorporation of atomically dispersed Fe was further confirmed by electron paramagnetic resonance spectrum (Figure 3D), where the intensity of the signal at g = 1.992, assigning to the produced Ti 3+ . [ 14–16 ] The intensity of the signal steadily increases with increase in the amount of introduced Fe.…”

Section: Figurementioning

confidence: 99%

Fe₁/TiO₂ Hollow Microspheres: Fe and Ti Dual Active Sites Boosting the Photocatalytic Oxidation of NO

Zhao

Zhang

et al. 2020

Small

View full text Add to dashboard Cite

Recently, single‐atom catalysts have aroused extensive attention in fields of clean energy and environmental protection due to their unique activity and efficient utilization of the active atoms. It is of great importance but still remains a great challenge to unveil the effect of single atoms on precise catalysis. Herein, it is reported that doping TiO2 hollow microspheres (TiO2‐HMSs) with single atomic Fe can boost the photoreactivity of TiO2‐HMSs towards NO oxidation due to the synergistic effects of atomically dispersed Fe and bonded Ti atom which act as dual active sites. The atomically dispersed Fe atoms occupy the subsurface Ti vacancies, and the interaction between Ti 3d and Fe 3d orbitals result in the formation of FeTi bond. Single atomic Fe modulates the electronic structure of the bonded Ti atoms by electron transfer, which facilitates the adsorption and activation of NO and O2 at Fe and bonded Ti sites, respectively. In addition, the introduction of single atomic Fe sharply suppresses the production of toxic NO2 byproduct. The synergistic effects of the dual active sites then cause a drastic promotion in photocatalytic oxidation of NO.

show abstract

Section: Figurementioning

confidence: 99%

Fe₁/TiO₂ Hollow Microspheres: Fe and Ti Dual Active Sites Boosting the Photocatalytic Oxidation of NO

Zhao

Zhang

et al. 2020

Small

View full text Add to dashboard Cite

show abstract

“…Shang et al. designed and synthesized blue TiO 2 with oxygen vacancies for NO photooxidation; Jin et al. used an OV‐engineered Bi 24 O 31 Cl 10 sample for CO 2 photoreduction; Li et al.…”

Section: Introductionmentioning

confidence: 99%

Surface Engineering of g‐C₃N₄ by Stacked BiOBr Sheets Rich in Oxygen Vacancies for Boosting Photocatalytic Performance

et al. 2020

View full text Add to dashboard Cite

BiOBr containing surface oxygen vacancies (OVs) was prepared by a simple solvothermal method and combined with graphitic carbon nitride (g‐C3N4) to construct a heterojunction for photocatalytic oxidation of nitric oxide (NO) and reduction of carbon dioxide (CO2). The formation of the heterojunction enhanced the transfer and separation efficiency of photogenerated carriers. Furthermore, the surface OVs sufficiently exposed catalytically active sites, and enabled capture of photoexcited electrons at the surface of the catalyst. Internal recombination of photogenerated charges was also limited, which contributed to generation of more active oxygen for NO oxidation. Heterojunction and OVs worked together to form a spatial conductive network framework, which achieved 63 % NO removal, 96 % selectivity for carbonaceous products (that is, CO and CH4). The stability of the catalyst was confirmed by cycling experiments and X‐ray diffraction and transmission electron microscopy after NO removal.

show abstract

“…, efficiently reducing the concentrations of the OVs in the 10% Bi 0 /CeO 2−δ photocatalyst [40]. Fig.…”

Section: +mentioning

confidence: 95%

Flower-like Bi0/CeO2−δ plasmonic photocatalysts with enhanced visible-light-induced photocatalytic activity for NO removal

et al. 2020

View full text Add to dashboard Cite

Plasmonic bismuth (Bi 0) nanoparticle-decorated flower-like CeO 2−δ (Bi 0 /CeO 2−δ) photocatalysts with abundant oxygen vacancies (OVs) were synthesized via a solvothermal method. The OVs can not only improve the separation of electron-hole pairs, but also facilitate the adsorption and activation of gas molecules (NO/O 2). In addition, the Bi 0 nanoparticles can enhance the visible light response and prevent the recombination of charge carriers by virtue of the surface plasmon resonance (SPR) effect, achieving an excellent ability for NO elimination and NO 2 inhibition under visible light irradiation. Density functional theory (DFT) calculations confirm that the Schottky barrier between Bi 0 and CeO 2−δ accompanied with the OVs are pivotal for the migration of photogenerated charge carriers to involve in the photocatalytic NO removal. Trapping experiments and in situ FTIR spectroscopy were conducted to explore the mechanism of the photocatalytic NO removal, suggesting that the photocatalytic NO removal can be significantly enhanced by introducing abundant OVs and the involvement of Bi 0 metal nanoparticles.

show abstract

Oxygen Vacancies Promoted the Selective Photocatalytic Removal of NO with Blue TiO₂ via Simultaneous Molecular Oxygen Activation and Photogenerated Hole Annihilation

Cited by 241 publications

References 59 publications

Fe₁/TiO₂ Hollow Microspheres: Fe and Ti Dual Active Sites Boosting the Photocatalytic Oxidation of NO

Fe₁/TiO₂ Hollow Microspheres: Fe and Ti Dual Active Sites Boosting the Photocatalytic Oxidation of NO

Surface Engineering of g‐C₃N₄ by Stacked BiOBr Sheets Rich in Oxygen Vacancies for Boosting Photocatalytic Performance

Flower-like Bi0/CeO2−δ plasmonic photocatalysts with enhanced visible-light-induced photocatalytic activity for NO removal

Contact Info

Product

Resources

About

Oxygen Vacancies Promoted the Selective Photocatalytic Removal of NO with Blue TiO2 via Simultaneous Molecular Oxygen Activation and Photogenerated Hole Annihilation

Cited by 241 publications

References 59 publications

Fe1/TiO2 Hollow Microspheres: Fe and Ti Dual Active Sites Boosting the Photocatalytic Oxidation of NO

Fe1/TiO2 Hollow Microspheres: Fe and Ti Dual Active Sites Boosting the Photocatalytic Oxidation of NO

Surface Engineering of g‐C3N4 by Stacked BiOBr Sheets Rich in Oxygen Vacancies for Boosting Photocatalytic Performance

Flower-like Bi0/CeO2−δ plasmonic photocatalysts with enhanced visible-light-induced photocatalytic activity for NO removal

Contact Info

Product

Resources

About

Oxygen Vacancies Promoted the Selective Photocatalytic Removal of NO with Blue TiO₂ via Simultaneous Molecular Oxygen Activation and Photogenerated Hole Annihilation

Fe₁/TiO₂ Hollow Microspheres: Fe and Ti Dual Active Sites Boosting the Photocatalytic Oxidation of NO

Fe₁/TiO₂ Hollow Microspheres: Fe and Ti Dual Active Sites Boosting the Photocatalytic Oxidation of NO

Surface Engineering of g‐C₃N₄ by Stacked BiOBr Sheets Rich in Oxygen Vacancies for Boosting Photocatalytic Performance