Construction of multi-homojunction TiO2 nanotubes for boosting photocatalytic hydrogen evolution by steering photogenerated charge transfer

Xue, Jinbo; Jiang, Shan; Lei, Chengkun; Chang, Huan; Gao, Jiaqi; Liu, Xuguang; Li, Qi; Shen, Qianqian

doi:10.1007/s12274-022-5050-7

Cited by 23 publications

(13 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are two reasons for the increase in the recombination of e − /h + pairs: (1) the high ion amount occupies the active sites of the photocatalyst, which can lead to a decrease in the surface area and, as a result, photocatalytic activity decreases 49 and (2) a large number of ion dopants are densely distributed on the TiO 2 surface, which can block the catalyst surface from receiving light irradiation, reducing the ability of TiO 2 to produce e − /h + pairs, thus decreasing the release of H 2 . 50,51 Huang and co-workers reported that the optimum doping amount of Nd 3+ was 0.1%, at which the average rate of H 2 evolution was 3.5 times that of undoped TiO 2 . 52 The release rate began to decrease with increasing doping concentration after peaking because Nd 3+ became the center of the e − /h + composite.…”

Section: Feature Analysismentioning

confidence: 99%

Ensemble learning to predict solar-to-hydrogen energy conversion based on photocatalytic water splitting over doped TiO₂

Liu,

Pan,

Zhu

et al. 2023

Green Chem.

View full text Add to dashboard Cite

show abstract

Section: Feature Analysismentioning

confidence: 99%

Ensemble learning to predict solar-to-hydrogen energy conversion based on photocatalytic water splitting over doped TiO₂

Liu,

Pan,

Zhu

et al. 2023

Green Chem.

View full text Add to dashboard Cite

show abstract

“…The difference in H 2 -evolution rates between the TP and RT samples is significant, which further indicates that macromolecule OH – does not easily enter the inner surface of the catalyst to participate in the reaction. The ability of Pt to capture H + renders it a highly favorable site for the H 2 -evolution reaction, resulting in a disparity in activity between TP and TR samples …”

Section: Resultsmentioning

confidence: 99%

“…The ability of Pt to capture H + renders it a highly favorable site for the H 2 -evolution reaction, resulting in a disparity in activity between TP and TR samples. 44 Figure 6c depicts the stability of PTR after 20 h of exposure to UV−vis light irradiation in terms of the measured amount of evolved H 2 . The PTR sample showed a gradual decrease in H 2 evolution after four 5 h cycles.…”

Section: Structure and Morphologymentioning

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

“…These results indicate that Ti 3+ has been formed, as reported in the literature. [38][39][40] EPR is usually used to investigate chemical species with unpaired electrons. From Fig.…”

Section: Characteristics Of the Photocatalystmentioning

confidence: 99%

Solar-driven photocatalytic removal of NO over a concrete paving eco-block containing black TiO₂

Dong,

Wang,

Tan

et al. 2023

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

Construction of multi-homojunction TiO2 nanotubes for boosting photocatalytic hydrogen evolution by steering photogenerated charge transfer

Cited by 23 publications

References 59 publications

Ensemble learning to predict solar-to-hydrogen energy conversion based on photocatalytic water splitting over doped TiO₂

Ensemble learning to predict solar-to-hydrogen energy conversion based on photocatalytic water splitting over doped TiO₂

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

Solar-driven photocatalytic removal of NO over a concrete paving eco-block containing black TiO₂

Contact Info

Product

Resources

About

Construction of multi-homojunction TiO2 nanotubes for boosting photocatalytic hydrogen evolution by steering photogenerated charge transfer

Cited by 23 publications

References 59 publications

Ensemble learning to predict solar-to-hydrogen energy conversion based on photocatalytic water splitting over doped TiO2

Ensemble learning to predict solar-to-hydrogen energy conversion based on photocatalytic water splitting over doped TiO2

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

Solar-driven photocatalytic removal of NO over a concrete paving eco-block containing black TiO2

Contact Info

Product

Resources

About

Ensemble learning to predict solar-to-hydrogen energy conversion based on photocatalytic water splitting over doped TiO₂

Ensemble learning to predict solar-to-hydrogen energy conversion based on photocatalytic water splitting over doped TiO₂

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

Solar-driven photocatalytic removal of NO over a concrete paving eco-block containing black TiO₂