Black hollow TiO2 nanocubes: Advanced nanoarchitectures for efficient visible light photocatalytic applications

Ziarati, Abolfazl; Бадией, Алиреза; Luque, Rafael

doi:10.1016/j.apcatb.2018.07.020

Cited by 72 publications

(31 citation statements)

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“…TiO 2 nanocrystals with different shapes, as shown in Figure 1a-f, have been synthesized and demonstrated for photo-reforming of methanol into hydrogen under UV light [45]. In another study, the synthesis of TiO 2 solid and hollow nanocubes have been demonstrated, as shown in Figure 2, and applied for the photocatalytic-mediated synthesis of benzimidazole under UV and visible conditions [46]. Similarly, TiO 2 with different morphologies such as nanospheres, nanocubes, nanotubes, nanorods, nanoflowers, nanosheets, and nanofibers have been synthesized and studied for their photocatalytic applications [47][48][49][50][51][52][53].…”

Section: Morphology-dependent Photocatalytic Properties Of Tiomentioning

confidence: 99%

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

2019

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Photocatalysis is a multifunctional phenomenon that can be employed for energy applications such as H2 production, CO2 reduction into fuels, and environmental applications such as pollutant degradations, antibacterial disinfection, etc. In this direction, it is not an exaggerated fact that TiO2 is blooming in the field of photocatalysis, which is largely explored for various photocatalytic applications. The deeper understanding of TiO2 photocatalysis has led to the design of new photocatalytic materials with multiple functionalities. Accordingly, this paper exclusively reviews the recent developments in the modification of TiO2 photocatalyst towards the understanding of its photocatalytic mechanisms. These modifications generally involve the physical and chemical changes in TiO2 such as anisotropic structuring and integration with other metal oxides, plasmonic materials, carbon-based materials, etc. Such modifications essentially lead to the changes in the energy structure of TiO2 that largely boosts up the photocatalytic process via enhancing the band structure alignments, visible light absorption, carrier separation, and transportation in the system. For instance, the ability to align the band structure in TiO2 makes it suitable for multiple photocatalytic processes such as degradation of various pollutants, H2 production, CO2 conversion, etc. For these reasons, TiO2 can be realized as a prototypical photocatalyst, which paves ways to develop new photocatalytic materials in the field. In this context, this review paper sheds light into the emerging trends in TiO2 in terms of its modifications towards multifunctional photocatalytic applications.

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Section: Morphology-dependent Photocatalytic Properties Of Tiomentioning

confidence: 99%

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

2019

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“…34,35 The presence of oxygen vacancies on the surface of black TiO 2 provides excess electrons at the defect sites, decreases the band gap of TiO 2 to the visible region and decreases charge recombination. 24,36,37 Based on the above considerations, the design of a noble metal NP decorated yolk-shell TiO 2 structure with a hydrogenated urchin-like surface is an effective method to solve the low light harvesting efficiency of titania which can lead to the next generation of advanced photocatalytic materials for coupling reactions. Therefore, following research endeavours from our groups, [38][39][40][41] herein we wish to propose a hierarchical urchin-like yolk@shell TiO 2 architecture decorated with plasmonic Au/Pd NPs (HUY@S-TOH@AuPd) as an advanced architecture for photocatalytic Suzuki-Miyaura coupling reactions at room temperature under visible light irradiation.…”

Section: Introductionmentioning

confidence: 99%

Engineering of highly active Au/Pd supported on hydrogenated urchin-like yolk@shell TiO₂ for visible light photocatalytic Suzuki coupling

Rohani

Ziarati

Ziarani

et al. 2019

Catal. Sci. Technol.

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“…The peaks at around 530 nm are derived from the oxygen vacancies buried in the 284 bulk of materials[61]. The surface defects can form the exciton energy level near the bottom of the 285 conduction band, which allows them to act as trapping sites and hinders the recombination of 286 photogenerated chargers[36,62]. InFigure 7, the signals of TiO2-X are similar, but the peak intensity 287 Photoluminescence spectra of TiO 2 -X.…”

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“…It is reported that the higher the crystallinity, the fewer defects in the crystal. Therefore, defects (oxygen vacancies) may exist in TiO 2 -X samples after hydrothermal treatment [36]. Moreover, compared with the pristine the TiO 2 , low frequency peak at 138 cm −1 (E g ) of the TiO 2 -X samples after hydrothermal treatment exhibits slight blue shift and significant broadening.…”

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confidence: 99%

Effects of Particle Size on the Structure and Photocatalytic Performance by Alkali-Treated TiO2

et al. 2020

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Particle size of nanomaterials has significant impact on their photocatalyst properties. In this paper, TiO 2 nanoparticles with different crystalline sizes were prepared by adjusting the alkali-hydrothermal time (0-48 h). An annealing in N 2 atmosphere after hydrothermal treatment caused TiO 2 reduction and created defects, resulting in the visible light photocatalytic activity. The evolution of physicochemical properties along with the increase of hydrothermal time at a low alkali concentration has been revealed. Compared with other TiO 2 samples, TiO 2 -24 showed higher photocatalytic activity toward degrading Rhodamine B and Sulfadiazine under visible light. The radical trapping and ESR experiments revealed that O 2•is the main reactive specie in TiO 2 -24.Large specific surface areas and rapid transfer of photogenerated electrons are responsible for enhancing photocatalytic activity. The above findings clearly demonstrate that particle size and surface oxygen defects can be regulated by alkali-hydrothermal method. This research will deepen the understanding of particle size on the nanomaterials performance and provide new ideas for designing efficient photocatalysts.

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Black hollow TiO2 nanocubes: Advanced nanoarchitectures for efficient visible light photocatalytic applications

Cited by 72 publications

References 46 publications

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

Engineering of highly active Au/Pd supported on hydrogenated urchin-like yolk@shell TiO₂ for visible light photocatalytic Suzuki coupling

Effects of Particle Size on the Structure and Photocatalytic Performance by Alkali-Treated TiO2

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Black hollow TiO2 nanocubes: Advanced nanoarchitectures for efficient visible light photocatalytic applications

Cited by 72 publications

References 46 publications

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

Engineering of highly active Au/Pd supported on hydrogenated urchin-like yolk@shell TiO2 for visible light photocatalytic Suzuki coupling

Effects of Particle Size on the Structure and Photocatalytic Performance by Alkali-Treated TiO2

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Engineering of highly active Au/Pd supported on hydrogenated urchin-like yolk@shell TiO₂ for visible light photocatalytic Suzuki coupling