CsPbBr3 quantum dots-decorated porous covalent triazine frameworks nanocomposites for enhanced solar-driven H2O2 production

Zheng, Yong; Gao, Tao; Chen, Shan; Ferguson, Calum T. J.; Zhang, Kai A. I.; Fan, Fang; Shen, Yi; Khan, Niaz Ali; Wang, Long; Ye, Liqun

doi:10.1016/j.coco.2022.101390

Cited by 41 publications

(27 citation statements)

References 33 publications

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“…Solar energy has been introduced as a clean sustainable energy source that can efficiently drive chemical reactions. − Recently, researchers have expressed interest in photocatalytic selective oxidation reactions because of their promising potential for driving organic transformations. For this reason, different photocatalysts have been explored such as g-C 3 N 4 , TiO 2 , CdS, WO 3 , Bi 2 WO 6 , Bi 2 MoO 6 , and MoS 2 to enhance the photocatalytic partial oxidation of benzyl alcohol to benzaldehyde. − Unfortunately, these systems still suffer from low performance and poor selectivity toward benzaldehyde.…”

Section: Introductionmentioning

confidence: 99%

Plasmon-Enhanced Photocatalytic Oxidation of Benzyl Alcohol to Benzaldehyde Using BiVO₄/BiOBr/Au Nanosheets

ElMetwally

Sayed

Shim

et al. 2023

ACS Appl. Nano Mater.

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Plasmonic Au nanoparticles were deposited over photocatalytic BiVO 4 /BiOBr nanosheets with different loadings in the range of 0.5−5% (w/w) to boost the photocatalytic reactivity via surface plasmonic resonance. The results showed that the highest benzyl alcohol conversion (100%) and the maximum benzaldehyde yield (99%) were obtained using BiVO 4 /BiOBr/Au 3% after 4 h of irradiation. Electron paramagnetic resonance analysis and trapping experiments revealed that singlet oxygen is the dominant species produced within the system and suggest that it is the main species driving photocatalytic oxidation of benzyl alcohol to benzaldehyde. The proposed mechanism involves irradiation of BiVO 4 /BiOBr/Au with light to excite its electrons to the singlet state and produce singlet excitons, which eventually produces triplet excitons via intersystem crossing. Dissolved O 2 subsequently reacts with these triplet excitons to produce singlet oxygen. Moreover, the energy barrier and the intrinsic reaction indicated that the reaction is thermodynamically favorable. These results demonstrate the unique effects of plasmonic resonance on photocatalytic activity, which can be adapted to different selective oxidation reactions.

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Section: Introductionmentioning

confidence: 99%

Plasmon-Enhanced Photocatalytic Oxidation of Benzyl Alcohol to Benzaldehyde Using BiVO₄/BiOBr/Au Nanosheets

ElMetwally

Sayed

Shim

et al. 2023

ACS Appl. Nano Mater.

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“…Morphological and structural properties. Due to the widespread of these metals and the availability of these metals on earth, metal oxides have attracted significant interest in a variety of applications including catalysis, energy storage, electrochemical applications, photochemical cells, water treatment, and biological applications [46][47][48][49] for their non-toxicity, low cost, and semiconducting properties. Hematite (α-Fe 2 O 3 ) is one of these metal oxides and is chemically and thermodynamically stable.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of nitrogen doped TiO2/Fe2O3 nanostructures for photocatalytic oxidation of methanol based wastewater

Mersal

Zedan

Mohamed

et al. 2023

Sci Rep

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An important industrial process that often occurs on the surface of a heterogeneous catalyst using thermochemical or photochemical could help in the oxidation of methanol-based wastewater to formaldehyde. Titania-based photocatalysts have drawn a lot of interest from scientists because they are a reliable and affordable catalyst material for photocatalytic oxidation processes in the presence of light energy. In this study, a straight-forward hydrothermal method for producing n-TiO2@α-Fe2O3 composite photocatalysts and hematite (α-Fe2O3) nanocubes has been done. By adjusting the ratio of n-TiO2 in the prepared composite photocatalysts, the enhancing influence of the nitrogen-doped titania on the photocatalytic characteristics of the prepared materials was investigated. The prepared materials were thoroughly characterized using common physiochemical methods, such as transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive X-ray (EDX), X-ray photoelectrons spectroscopy (XPS), physisorption (BET), and others, in order to learn more about the structure The results obtained showed that nitrogen-doped titania outperforms non-doped titania for methanol photooxidation. The addition of nitrogen-doped titania to their surfaces resulted in an even greater improvement in the photooxidation rates of the methanol coupled with hematite. The photooxidation of methanol in the aqueous solution to simulate its concentration in the wastewater has been occurred. After 3 h, the four weight percent of n-TiO2@α-Fe2O3 photocatalyst showed the highest rate of HCHO production.

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“…The results show the importance of rational defect engineering for efficient carbon-based photocatalyst development. The dual-gas-phase reaction is expected to modify carbon-based materials for electrocatalysis and energy storage devices. − …”

Section: Resultsmentioning

confidence: 99%

Defect and Electronic Structure Engineering Graphitic Carbon Nitride with Dual-Gas-Phase Reaction for Visible-Light-Driven Hydrogen Evolution

Wei

et al. 2023

ACS Appl. Energy Mater.

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The intrinsic high charge recombination and narrow light absorption seriously affect the performance of g-C3N4 toward photocatalytic hydrogen generation. In this work, this problem is partially overcome by a dual-gas-phase treatment protocol, first ammonia and followed by phosphine annealing. Owing to facilitated contact between gas precursor and layered g-C3N4, the ammonia annealing created N vacancies provide cross-plane diffusion channels for efficient bulk charge separation and more active sites due to decreased aggregation. Despite the band gap broadening being accompanied by ammonia annealing, the introduction of a secondary impurity (P atom) in corner carbon sites narrows down the band gap to 2.56 eV. The combination of N defects (amine groups) and P dopants (carbon defects) allows capturing as many atomic Pt as possible as cocatalyst, with weakened binding energy between Pt and H atom by 0.42 V when compared to Pt–H binding in pristine g-C3N4. This leads to a low overpotential for materials to efficiently break energy barriers in the process of interfacial charge transfer. As a result, the target material beyond the one obtained by traditional solid or liquid doping delivers a hydrogen evolution rate up to 1959 μmol·h–1·g–1 under visible light (λ > 420 nm), nearly 8 times higher than that of pristine g-C3N4/Pt (250 μmol·h–1·g–1). The results demonstrate the success of our dual-gas-phase activation strategy and the importance of rational dual-defect engineering for improving the photocatalytic activity of layered materials, not limited to g-C3N4.

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CsPbBr3 quantum dots-decorated porous covalent triazine frameworks nanocomposites for enhanced solar-driven H2O2 production

Cited by 41 publications

References 33 publications

Plasmon-Enhanced Photocatalytic Oxidation of Benzyl Alcohol to Benzaldehyde Using BiVO₄/BiOBr/Au Nanosheets

Plasmon-Enhanced Photocatalytic Oxidation of Benzyl Alcohol to Benzaldehyde Using BiVO₄/BiOBr/Au Nanosheets

Fabrication of nitrogen doped TiO2/Fe2O3 nanostructures for photocatalytic oxidation of methanol based wastewater

Defect and Electronic Structure Engineering Graphitic Carbon Nitride with Dual-Gas-Phase Reaction for Visible-Light-Driven Hydrogen Evolution

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CsPbBr3 quantum dots-decorated porous covalent triazine frameworks nanocomposites for enhanced solar-driven H2O2 production

Cited by 41 publications

References 33 publications

Plasmon-Enhanced Photocatalytic Oxidation of Benzyl Alcohol to Benzaldehyde Using BiVO4/BiOBr/Au Nanosheets

Plasmon-Enhanced Photocatalytic Oxidation of Benzyl Alcohol to Benzaldehyde Using BiVO4/BiOBr/Au Nanosheets

Fabrication of nitrogen doped TiO2/Fe2O3 nanostructures for photocatalytic oxidation of methanol based wastewater

Defect and Electronic Structure Engineering Graphitic Carbon Nitride with Dual-Gas-Phase Reaction for Visible-Light-Driven Hydrogen Evolution

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Product

Resources

About

Plasmon-Enhanced Photocatalytic Oxidation of Benzyl Alcohol to Benzaldehyde Using BiVO₄/BiOBr/Au Nanosheets

Plasmon-Enhanced Photocatalytic Oxidation of Benzyl Alcohol to Benzaldehyde Using BiVO₄/BiOBr/Au Nanosheets