A hierarchical Nb<sub>2</sub>O<sub>5</sub>@NiFe-MMO rod array, fabricated and used as a structured photocatalyst

Liu, Fei; Wang, Yuwei; Kong, Xianggui; Lei, Deqiang; Zhang, Fazhi; Lei, Xiaodong

doi:10.1039/c8ra10432h

Cited by 6 publications

(2 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 4b depicts the deconvoluted spectra of Ce 3d 5/2 and Ce 3d 3/2 , which show the appearance of six peaks attributed to the presence of Ce 4+ and Ce 3+ at 883.6 eV (v), 890.1 eV (v ), 899.4 eV (v ), 902 eV (u), 908.7 eV (u ), and 917.8 eV (u ) [45]. The presence of the Nb +5 oxidation state was confirmed by the appearance of the noticeable peaks at 208 eV (Nb 3d 5/2 ) and 211.1 eV (Nb 3d 3/2 ) in Figure 4c [46]. The special sp 2 (C-C) bond in the CN from g-C 3 N 4 was responsible for three peaks in the region of 284 eV in Figure 4d.…”

Section: Synthesis and Characterization Of Ceomentioning

confidence: 76%

Cerium Niobate Hollow Sphere Engineered Graphitic Carbon Nitride for Synergistic Photothermal/Chemodynamic Cancer Therapy

et al. 2023

View full text Add to dashboard Cite

Reactive oxygen species (ROS)-mediated chemodynamic therapy (CDT) and photothermal therapy (PTT) have potential for various cancer treatments. However, they are still bound by the demands of Fenton reaction conditions such as oxygen dependence, inherent defects in common standard photosensitizers (PSs), and the continuous availability of laser sources. Herein, we designed Ce3NbO7/g-C3N4 nanocomposites (NCs) and investigated their ability to evaluate the performance of PTT/CDT synergistically to enhance cancer treatment. The activation of Ce3NbO7/g-C3N4 NCs in the tumor microenvironment (TME) causes the generation of cytotoxic ROS via the Fenton reaction. Additionally, the g-C3N4 in NCs absorbs NIR, generating hyperthermia in the TME. The photothermal conversion efficiency (ƞ) of the Ce3NbO7/g-C3N4 NCs was found to be 49.5%. A photocatalytic reaction with PTT-enhanced Fenton reagents, without consuming additional photothermal agents (PTA) or Fenton reagents, generates the hydroxyl radical (OH•) primarily by direct electron transfer in the TME. Almost 68% of cells experienced programmed cell death due to the combinational effect (PTT/CDT), making it an efficient and biocompatible therapy. Furthermore, this work provides a basis for developing numerous innovative materials that can be used to treat cancer, overcome general limitations, and enhance ROS production under single-wavelength (808 nm) laser irradiation.

show abstract

Section: Synthesis and Characterization Of Ceomentioning

confidence: 76%

Cerium Niobate Hollow Sphere Engineered Graphitic Carbon Nitride for Synergistic Photothermal/Chemodynamic Cancer Therapy

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Recently, the direct oxidative coupling of amines to form imines by photocatalysis has intrigued the scientists due to its economical and environmentally friendly advantages. These photocatalysts include TiO 2 [6], BiVO 4 [7], BiOX (X = Cl, Br, I) [5], MOF [8,9], Nb 2 O 5 [10], graphite carbon nitride (g-C 3 N 4 ) [11], and so on.…”

Section: Introductionmentioning

confidence: 99%

Z-scheme g-C₃N₄/Fe₂O₃ for efficient photo-oxidation of benzylamine under mild conditions

Chen

Tang

Wang

et al. 2021

Semicond. Sci. Technol.

View full text Add to dashboard Cite

As an important intermediate, imine is widely used in industrial chemistry. The photocatalytic oxidation of amines to form imines is a green and economical method. But it remains a challenge for the efficient transformation under mild conditions. Herein, a Z-scheme carbon nitride (CM)-Fe2O3 heterojunction photocatalyst was synthesized by in-situ preparation of Fe2O3 nanoparticles on two-dimensional CM nanosheets. The as-prepared catalyst exhibited efficient photocatalysis activity in selective oxidation of benzylamine to N-benzylidene benzylamine. Under ambient air and room temperature, the selectivity and conversion rate both can reach 99.9%, and the corresponding turnover frequency value reaches up to 9.99 mmol g−1 h−1, superior to the most of heterogeneous photocatalysts reported in previous literatures. The excellent catalytic activity of the modified CM material may be due to the enhanced absorption of visible light and the improved photogenerated carrier separation and migration rate, and the Z-scheme mechanism also retains the strong oxidation and reduction ability of the composite material. This work will provide a promising and practical method to promote the photocatalytic conversion of solar-driven organics.

show abstract

Nb₂O₅‐Based Photocatalysts

et al. 2021

View full text Add to dashboard Cite

Photocatalysis is one potential solution to the energy and environmental crisis and greatly relies on the development of the catalysts. Niobium pentoxide (Nb 2 O 5 ), a typically nontoxic metal oxide, is eco-friendly and exhibits strong oxidation ability, and has attracted considerable attention from researchers. Furthermore, unique Lewis acid sites (LASs) and Brønsted acid sites (BASs) are observed on Nb 2 O 5 prepared by different methods. Herein, the recent advances in the synthesis and application of Nb 2 O 5 -based photocatalysts, including the pure Nb 2 O 5 , doped Nb 2 O 5 , metal species supported on Nb 2 O 5 , and other composited Nb 2 O 5 catalysts, are summarized. An overview is provided for the role of size and crystalline phase, unsaturated Nb sites and oxygen vacancies, LASs and BASs, dopants and surface metal species, and heterojunction structure on the Nb 2 O 5 -based catalysts in photocatalysis. Finally, the challenges are also presented, which are possibly overcome by integrating the synthetic methodology, developing novel photoelectric characterization techniques, and a profound understanding of the local structure of Nb 2 O 5 .

show abstract

A hierarchical Nb₂O₅@NiFe-MMO rod array, fabricated and used as a structured photocatalyst

Abstract: The work provides a new strategy to the exploration of excellent structured photocatalysts based on transition metal oxide materials for selective aerobic oxidation of benzylamine to imine.

Cited by 6 publications

References 53 publications

Cerium Niobate Hollow Sphere Engineered Graphitic Carbon Nitride for Synergistic Photothermal/Chemodynamic Cancer Therapy

Cerium Niobate Hollow Sphere Engineered Graphitic Carbon Nitride for Synergistic Photothermal/Chemodynamic Cancer Therapy

Z-scheme g-C₃N₄/Fe₂O₃ for efficient photo-oxidation of benzylamine under mild conditions

Nb₂O₅‐Based Photocatalysts

Contact Info

Product

Resources

About

A hierarchical Nb2O5@NiFe-MMO rod array, fabricated and used as a structured photocatalyst

Abstract: The work provides a new strategy to the exploration of excellent structured photocatalysts based on transition metal oxide materials for selective aerobic oxidation of benzylamine to imine.

Cited by 6 publications

References 53 publications

Cerium Niobate Hollow Sphere Engineered Graphitic Carbon Nitride for Synergistic Photothermal/Chemodynamic Cancer Therapy

Cerium Niobate Hollow Sphere Engineered Graphitic Carbon Nitride for Synergistic Photothermal/Chemodynamic Cancer Therapy

Z-scheme g-C3N4/Fe2O3 for efficient photo-oxidation of benzylamine under mild conditions

Nb2O5‐Based Photocatalysts

Contact Info

Product

Resources

About

A hierarchical Nb₂O₅@NiFe-MMO rod array, fabricated and used as a structured photocatalyst

Z-scheme g-C₃N₄/Fe₂O₃ for efficient photo-oxidation of benzylamine under mild conditions

Nb₂O₅‐Based Photocatalysts