Superior efficiency of BN/Ce2O3/TiO2 nanofibers for photocatalytic hydrogen generation reactions

Ghorbanloo, Massomeh; Nada, Amr A.; El-Maghrabi, Heba H.; Bekheet, Maged F.; Riedel, Wiebke; Djamel, Bezzerga; Viter, Roman; Roualdès, S.; Soliman, Fathi S.; Moustafa, Yasser M.; Miele, Philippe; Bechelany, Mikhael

doi:10.1016/j.apsusc.2022.153438

Cited by 24 publications

(3 citation statements)

References 104 publications

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“…The pure MCS and F-TiO 2 /MCS display the same five major diffraction peaks of XRD at 25.13, 26.82, 28.54, 44.14, and 53.32°corresponding to the (100), (002), 101), (004), and (200), respectively. 39,40 However, it is worth noting that the diffraction peaks of the F-TiO 2 /MCS composite material can simultaneously exhibit the characteristic diffraction peaks of F-TiO 2 and MCS, verifying that F-TiO 2 and MCS are successfully integrated. Furthermore, it is clear to see that the spectra of the F-TiO 2 /MCS composite material contain the characteristic Raman peaks of F-TiO 2 and MCS (Figure 1c), which also indicate a successful composite of two pure materials.…”

Section: Synthesis and Characterization Of Catalystsmentioning

confidence: 86%

Fluorinated-TiO₂/Mn_0.2Cd_0.8S S-Scheme Heterojunction with Rich Sulfur Vacancies for Photocatalytic Hydrogen Production

Cheng,

Hua,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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The quick recombination of photogenerated carriers and the high surface reaction barrier are two important aspects influencing photocatalytic hydrogen generation. In this paper, a sulfur vacancy-modified twodimensional (2D) fluorinated-TiO 2 nanosheet/Mn 0.2 Cd 0.8 S (F-TiO 2 /MCS) Sscheme heterojunction was synthesized by a simple hydrothermal method to accelerate photogenerated electron transfer. The formation of an S-scheme heterojunction between MCS nanoflowers and 2D F-TiO 2 enhances the efficacy of photocatalytic hydrogen generation by facilitating the separation of photogenerated electron−hole pairs. Meanwhile, the sulfur vacancies of F-TiO 2 /MCS change the local electronic structure of the heterojunction surface by capturing photogenerated electrons, resulting in a photocatalytic hydrogen evolution rate for F-TiO 2 /MCS of 3197 μmol g −1 h −1 , which is 4.42 times greater than that of the pure MCS. Experimental measurements and density functional theory (DFT) calculations show that the mutual synergy between the S-scheme heterojunction and the sulfur vacancies not only provides abundant H 2 adsorption active sites but also promotes interfacial charge separation and migration, which improves the photocatalytic performance of the F-TiO 2 /MCS composite. This work holds significance for the photocatalytic hydrogen production of sulfur vacancy-modified S-scheme heterojunctions.

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Section: Synthesis and Characterization Of Catalystsmentioning

confidence: 86%

Fluorinated-TiO₂/Mn_0.2Cd_0.8S S-Scheme Heterojunction with Rich Sulfur Vacancies for Photocatalytic Hydrogen Production

Cheng,

Hua,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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“…The referred heterojunction is the type-II heterojunction and could be classified into four types such as the conventional type-II heterojunction, P-N junction, surface heterojunction and direct Z-scheme heterojunction, depending on the charge carrier separation mechanism [62]. Generally, the photocatalytic activity of TiO 2 could be enhanced by designing a heterojunction structure with several oxides and non-oxide materials [63][64][65]. For example, g-C 3 N 4 /TiO 2 heterojunction composite was synthesized via the in situ hydrothermal method, and the obtained band gap energy was proved to be 2.8 eV compared with 3.0 eV of TiO 2 [66].…”

Section: Heterojunction Designmentioning

confidence: 99%

Mineral-Supported Photocatalysts: A Review of Materials, Mechanisms and Environmental Applications

Simon

Bekheet

et al. 2022

Energies

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Although they are of significant importance for environmental applications, the industrialization of photocatalytic techniques still faces many difficulties, and the most urgent concern is cost control. Natural minerals possess abundant chemical inertia and cost-efficiency, which is suitable for hybridizing with various effective photocatalysts. The use of natural minerals in photocatalytic systems can not only significantly decrease the pure photocatalyst dosage but can also produce a favorable synergistic effect between photocatalyst and mineral substrate. This review article discusses the current progress regarding the use of various mineral classes in photocatalytic applications. Owing to their unique structures, large surface area, and negatively charged surface, silicate minerals could enhance the adsorption capacity, reduce particle aggregation, and promote photogenerated electron-hole pair separation for hybrid photocatalysts. Moreover, controlling the morphology and structure properties of these materials could have a great influence on their light-harvesting ability and photocatalytic activity. Composed of silica and alumina or magnesia, some silicate minerals possess unique orderly organized porous or layered structures, which are proper templates to modify the photocatalyst framework. The non-silicate minerals (referred to carbonate and carbon-based minerals, sulfate, and sulfide minerals and other special minerals) can function not only as catalyst supports but also as photocatalysts after special modification due to their unique chemical formula and impurities. The dye-sensitized minerals, as another natural mineral application in photocatalysis, are proved to be superior photocatalysts for hydrogen evolution and wastewater treatment. This work aims to provide a complete research overview of the mineral-supported photocatalysts and summarizes the common synergistic effects between different mineral substrates and photocatalysts as well as to inspire more possibilities for natural mineral application in photocatalysis.

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“…For example, the growth lattice orientation is a key element [9,14,15], because the high-energy facets as [211] and [112] of TiO 2 are more efficient than the lowestenergy ones [101] for photocatalytic reactions [9,12]. All these architectural factors can be controlled and tuned by the preparation method of the electrode: anodization [16], reactive magnetron sputtering [17], atomic layer deposition (ALD) [18], electrospinning [19], sol-gel [20], or metalorganic chemical vapor deposition (MOCVD) [21]. We have recently shown that MOCVD, a dry deposition technique, allows producing tree-like column morphologies with high surface area to enhance the photocatalytic properties [14].…”

Section: Introductionmentioning

confidence: 99%

Photo-Electrocatalytic Performance of Poly(3,4-Ethylenedioxythiophene)/TiO2 Nano-Tree Films Deposited by oCVD/CVD for H2 Production

Nada

Bekheet

Samélor

et al. 2023

Preprint

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Superior efficiency of BN/Ce2O3/TiO2 nanofibers for photocatalytic hydrogen generation reactions

Cited by 24 publications

References 104 publications

Fluorinated-TiO₂/Mn_0.2Cd_0.8S S-Scheme Heterojunction with Rich Sulfur Vacancies for Photocatalytic Hydrogen Production

Fluorinated-TiO₂/Mn_0.2Cd_0.8S S-Scheme Heterojunction with Rich Sulfur Vacancies for Photocatalytic Hydrogen Production

Mineral-Supported Photocatalysts: A Review of Materials, Mechanisms and Environmental Applications

Photo-Electrocatalytic Performance of Poly(3,4-Ethylenedioxythiophene)/TiO2 Nano-Tree Films Deposited by oCVD/CVD for H2 Production

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Superior efficiency of BN/Ce2O3/TiO2 nanofibers for photocatalytic hydrogen generation reactions

Cited by 24 publications

References 104 publications

Fluorinated-TiO2/Mn0.2Cd0.8S S-Scheme Heterojunction with Rich Sulfur Vacancies for Photocatalytic Hydrogen Production

Fluorinated-TiO2/Mn0.2Cd0.8S S-Scheme Heterojunction with Rich Sulfur Vacancies for Photocatalytic Hydrogen Production

Mineral-Supported Photocatalysts: A Review of Materials, Mechanisms and Environmental Applications

Photo-Electrocatalytic Performance of Poly(3,4-Ethylenedioxythiophene)/TiO2 Nano-Tree Films Deposited by oCVD/CVD for H2 Production

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Fluorinated-TiO₂/Mn_0.2Cd_0.8S S-Scheme Heterojunction with Rich Sulfur Vacancies for Photocatalytic Hydrogen Production

Fluorinated-TiO₂/Mn_0.2Cd_0.8S S-Scheme Heterojunction with Rich Sulfur Vacancies for Photocatalytic Hydrogen Production