Hollow Bi4Ti3O12/TiO2 nanocakes for photocatalytic hydrogen generation

Han, Minmin; Guo, Biao; Zhang, Zhengyang; Hu, Xun; Wang, Zhonghao

doi:10.1016/j.jallcom.2023.171192

Cited by 10 publications

(5 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After the introduction of Bi 4 Ti 3 O 12 , the band gap of 6Bi–TiO 2 (2.95 eV) is lower than those of the two undoped TiO 2 samples (3.02 and 3.04 eV). The narrow band gap of Bi 4 Ti 3 O 12 may account for such a result, 66 and a lower band gap with higher electron and hole pair separation efficiency further enhances the photocatalytic ability of the composite. To further explore the band structure of the samples, valence band (VB)-XPS was conducted.…”

Section: Resultsmentioning

confidence: 99%

“…The TiO 2 synthesized under microwave irradiation has a lower band gap than the TiO 2 -T sample, which can be credited to the higher concentration of oxygen vacancies. After the further introduction of Bi 4 Ti 3 O 12 , the original band structure of TiO 2 narrowed, 66 which is favorable for the photocatalytic process. Under the simulated visible light irradiation, photogenerated electrons in the valence band were excited and moved to the conduction band.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Microwave-assisted synthesis of oxygen vacancy associated Bi–TiO₂ nanocomposite for degradation of rhodamine B under visible light irradiation

Sun,

Zhang,

Yang

et al. 2024

React. Chem. Eng.

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Microwave-assisted synthesis of oxygen vacancy associated Bi–TiO₂ nanocomposite for degradation of rhodamine B under visible light irradiation

Sun,

Zhang,

Yang

et al. 2024

React. Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…Hydrogen possesses the attributes of superior energy density, eco-friendliness, the capacity to release heat through combustion, and the ability to be regeneratively transformed into water. − In recent decades, numerous approaches have been explored to attain efficient photocatalytic hydrogen production. So far, hundreds of semiconductor materials including TiO 2 , SnO 2 , ZrO 2 , CdS, and ZnS have been employed in photocatalytic hydrogen production. As a significant class of functional materials, metal oxides possess a diverse range of chemical compositions and structural variations, endowing them with immense potential in the field of photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Charge Separation in a PAN/ZnO Nanocomposite for Promoted Photocatalytic Hydrogen Evolution

Suo,

Xie,

Liao

et al. 2024

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

A PAN/ZnO (PAN, polyacrylonitrile) nanocomposite material was made using an ultrasound-assisted agitation method with PAN of different concentrations. XRD, SEM, TEM, BET, XPS, UV−vis, PL, FTIR, TPR, EIS, MS, and EPR techniques were used to analyze the effects of different PAN concentrations on the crystallinity, morphology, specific surface area, photocatalytic activity, photoresponse, and so on. The introduction of PAN in ZnO increases the photocatalytic hydrogen production activity. The composite material showed enhanced photocatalytic activity compared with the original PAN and ZnO catalysts. The optimal hydrogen production rate was 7.53 mmol•g −1 •h −1 for ZP20, surpassing that of ZnO (0.77 mmol•g −1 •h −1 ) and PAN (0.24 mmol•g −1 •h −1 ). This improvement is attributed to the effective charge transfer by PAN loading on ZnO, enhancing the separation efficiency of the photogenerated carriers through the binding of nanoparticles. This work supports a method for the design and synthesis of ZnO-based organic−inorganic hybrid photocatalysts.

show abstract

“…Thus, when the wavelength of photons overlaps with the absorption wavelength range of photocatalysts, light absorption is further enhanced. Meanwhile, because of their thin-shell structures, the hollow nanostructures significantly shorten the migration distance of photogenerated carriers, contributing to further improvements in the separation and migration efficiency of photogenerated charges. , …”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, because of their thin-shell structures, the hollow nanostructures significantly shorten the migration distance of photogenerated carriers, contributing to further improvements in the separation and migration efficiency of photogenerated charges. 24,25 By manipulating the locations of our dual cocatalysts on the Janus surface, we successfully synthesized a novel hollow flower-shaped TiO 2 nanomaterial, designated as PTR. Pt was loaded onto the inner surface, whereas RuO 2 was placed on the outer surface.…”

Section: Introductionmentioning

confidence: 99%

Janus Flower-Like Hollow TiO₂ Photocatalysts Bearing RuO₂ and Pt Nanoparticles for Solar-Light-Driven Catalytic H₂ Evolution

Li,

Zhu,

Zhang

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

The reaction efficiency of TiO 2 -based photocatalysts can be improved through the effective utilization of light and separation of carriers, which can be achieved via material structure designing. Herein, the synthesis of a novel hollow flowerlike TiO 2 -based nanomaterial by regulating the positions of dual cocatalysts on a Janus surface is reported. The dual cocatalysts (RuO 2 and Pt NPs) with redox capability were selectively deposited on different surfaces (constructed Janus surface) of TiO 2 materials to achieve directional transfer and spatial separation of photogenerated charges. Furthermore, the presence of dual cocatalysts may reduce the activation energy necessary for the reaction, enable the catalytic reaction to progress in a favorable direction, and increase the catalyst capability. Additionally, hollow nanostructures significantly shorten the migration distance of photogenerated carriers, owing to their thin-shell structure, further improving the separation of electron−hole pairs and migration efficiency. The results indicate that the deposition positions of the dual cocatalysts significantly affect the H 2 -evolution rate. Further studies reveal that macromolecule OH − exhibits a lower probability of entering the inner surface of the catalyst to participate in the reaction, whereas micromolecule H + demonstrates a higher probability of entering the inner surface of the catalyst, leading to differences in catalyst activity. Among the analyzed samples, PTR demonstrates the most notable H 2 -evolution rate, reaching 4,024 μmol g −1 h −1 , which is higher than those of pure TiO 2 and RTP by 60.96-and 1.22-fold, respectively. Furthermore, the mechanism of the charge migration pathway was analyzed via ultraviolet photoelectron spectroscopy, Mott−Schottky plots, and ultraviolet− visible diffusive reflectance spectroscopy. Catalyst activity increased substantially under illumination owing to the synergy between the special hollow Janus structure and the spatially separated dual cocatalysts.

show abstract

Hollow Bi4Ti3O12/TiO2 nanocakes for photocatalytic hydrogen generation

Cited by 10 publications

References 44 publications

Microwave-assisted synthesis of oxygen vacancy associated Bi–TiO₂ nanocomposite for degradation of rhodamine B under visible light irradiation

Microwave-assisted synthesis of oxygen vacancy associated Bi–TiO₂ nanocomposite for degradation of rhodamine B under visible light irradiation

Enhanced Charge Separation in a PAN/ZnO Nanocomposite for Promoted Photocatalytic Hydrogen Evolution

Janus Flower-Like Hollow TiO₂ Photocatalysts Bearing RuO₂ and Pt Nanoparticles for Solar-Light-Driven Catalytic H₂ Evolution

Contact Info

Product

Resources

About

Hollow Bi4Ti3O12/TiO2 nanocakes for photocatalytic hydrogen generation

Cited by 10 publications

References 44 publications

Microwave-assisted synthesis of oxygen vacancy associated Bi–TiO2 nanocomposite for degradation of rhodamine B under visible light irradiation

Microwave-assisted synthesis of oxygen vacancy associated Bi–TiO2 nanocomposite for degradation of rhodamine B under visible light irradiation

Enhanced Charge Separation in a PAN/ZnO Nanocomposite for Promoted Photocatalytic Hydrogen Evolution

Janus Flower-Like Hollow TiO2 Photocatalysts Bearing RuO2 and Pt Nanoparticles for Solar-Light-Driven Catalytic H2 Evolution

Contact Info

Product

Resources

About

Microwave-assisted synthesis of oxygen vacancy associated Bi–TiO₂ nanocomposite for degradation of rhodamine B under visible light irradiation

Microwave-assisted synthesis of oxygen vacancy associated Bi–TiO₂ nanocomposite for degradation of rhodamine B under visible light irradiation

Janus Flower-Like Hollow TiO₂ Photocatalysts Bearing RuO₂ and Pt Nanoparticles for Solar-Light-Driven Catalytic H₂ Evolution