Emerging cocatalysts in TiO2-based photocatalysts for light-driven catalytic hydrogen evolution: Progress and perspectives

Xia, Changlei; Nguyen, Thi Hong Chuong; Nguyen, Xuan Cuong; Kim, Soo Young; Nguyen, Dang; Raizada, Pankaj; Singh, Pardeep; Nguyen, Van‐Huy; Nguyen, Chinh Chien; Hoang, Van Chinh; Le, Quyet Van

doi:10.1016/j.fuel.2021.121745

Cited by 84 publications

(31 citation statements)

References 178 publications

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“…Among all the explored techniques, modification with cocatalytic systems to form heterojunctions appears to be a potential strategy to facilitate the charge transfer and function as active sites for enhancing the photocatalytic activity. Generally, transition metal oxides, noble metals, metal chalcogenides, and metal phosphides are used as cocatalysts. − The transition metal oxides are abundant and eco-friendly. As a traditional transition metal monoxide, nickel( II )oxide (NiO) has excellent characteristics of electrochromism, oxygen sensitivity, and thermal stability .…”

Section: Introductionmentioning

confidence: 99%

Efficient Photocatalytic Charge Separation at Anatase–Hematite Heterojunctions with a Tuned Three-Dimensional Cocatalytic NiO Support

Bhagya

Elias

Manoj

et al. 2022

Ind. Eng. Chem. Res.

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The present study explores a design strategy of loading active materials into porous cocatalytic supports for accomplishing rapid charge separation for photocatalytic hydrogen generation. Herein, a threedimensional ternary heterostructure is developed through in-situ formation of photocatalytically active nanoparticles inside porous Ni templates with exposed NiO as an efficient and stable photocatalyst. The design merit lies in rapid charge separation through NiO cocatalysts and availability of abundant active sites for efficient and sustained hydrogen generation. The introduction of NiO and the coexistence of active phases inside the porous NiO have modified the electronic structure and reduced the charge transfer resistance. This could facilitate the formation of more heterojunctions for faster interfacial charge transfer and enhanced visible light absorption characteristics. The optimal characteristics have enabled the threedimensional ternary heterostructure for realizing a substantial hydrogen generation of 1438 μmol h −1 , with an apparent quantum efficiency of 31.74%. The present methodology opens up new horizons, providing more insights and opportunities for extending contribution to structural designing of hierarchical architectures for largescale energy-related applications.

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Section: Introductionmentioning

confidence: 99%

Efficient Photocatalytic Charge Separation at Anatase–Hematite Heterojunctions with a Tuned Three-Dimensional Cocatalytic NiO Support

Bhagya

Elias

Manoj

et al. 2022

Ind. Eng. Chem. Res.

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“…Therefore, the consumable photocatalyst must have the necessary precondition, i.e. having conduction band energy greater than the ECB and a band energy capacity smaller than the EVB [59]. The choice of photocatalyst and its design is also more limited thermodynamically due to the bandgap energy (>2 eV) [60].…”

Section: Fundamentals Of Photocatalytic Water Splittingmentioning

confidence: 99%

“…Hence, by substituting noble metals on the surface of semiconductors as stimuli, it is tried to accelerate the reactions rate and make it easier to separate the e -/h + pair to increase the efficiency of the process. The hydrogen evolution is entirely dependent on the performance of the cocatalytic system [59].…”

Section: Fundamentals Of Photocatalytic Water Splittingmentioning

confidence: 99%

Hydrogen evolution via noble metals based photocatalysts: A review

et al. 2021

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In recent decades, the use of photocatalysts in the evolution of hydrogen (H2) has received much attention. However, the use of the well-known titanium oxide and another photocatalyst as a base for noble metals is limited due to their major weakness in electron-hole pair separation. The use of cocatalysts can be a good way to overcome this problem and provide better performance for the evolution of hydrogen. In this review, suitable high-efficiency cocatalysts for solar hydrogen production have been thoroughly reviewed. New strategies and solutions were examined in terms of increasing the recombination of charge carriers, designing reactive sites, and enhancing the wavelengths of light absorption. Several new types of cocatalysts based on semiconductors in noble groups and dual metals have been evaluated. It is expected that these photocatalysts will be able to reduce the activation energy of reaction and charge separation. In this regard, the existing views and challenges in the field of photocatalysts are presented. The characteristics of monoatomic photocatalysts are reviewed in this manuscript and the latest advances in this field are summarized. Further, the future trends and upcoming research are also briefly discussed. Finally, this review presents noble metal-based photocatalysts for providing suitable photocatalysts on a larger scale and improving their applicability.

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“…In recent decades, photocatalytic technology, as a green and sustainable wastewater treatment technology, has been introduced into water pollution treatment; its unique advantages [7] include a high treatment efficiency, green environmental characteristics and the ability to use renewable solar energy. Therefore, a variety of photocatalytic materials have been developed, such as TiO 2 [8], CdS [9], Bi 2 MoO 6 [10], and perovskite materials [11].…”

Section: Introductionmentioning

confidence: 99%

Efficient Visible-Light-Responsive Ag3PO4/g-C3N4/Hydroxyapatite Photocatalyst (from Oyster Shells) for the Degradation of Methylene Blue: Preparation, Properties and Mechanism

Song

Shang

et al. 2022

Catalysts

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A novel ternary Ag3PO4/g-C3N4/hydroxyapatite photocatalyst was prepared, and its morphology, composition and structure were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, high-resolution transmission electron microscopy, and electron spin resonance, etc. The results show that g-C3N4 is evenly dispersed in the interior of hydroxyapatite, forming a homogeneous composite, and significantly improves the band gap structure of the material as a whole. Ag3PO4/g-C3N4/hydroxyapatite has good electron transfer ability and an appropriate energy band structure, which shows that the material has a good degradation effect and stability. Finally, based on the characterization and experimental results, a possible Z-scheme mechanism was proposed, and the active species involved in the reaction are mainly O2− and h+.

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Emerging cocatalysts in TiO2-based photocatalysts for light-driven catalytic hydrogen evolution: Progress and perspectives

Cited by 84 publications

References 178 publications

Efficient Photocatalytic Charge Separation at Anatase–Hematite Heterojunctions with a Tuned Three-Dimensional Cocatalytic NiO Support

Efficient Photocatalytic Charge Separation at Anatase–Hematite Heterojunctions with a Tuned Three-Dimensional Cocatalytic NiO Support

Hydrogen evolution via noble metals based photocatalysts: A review

Efficient Visible-Light-Responsive Ag3PO4/g-C3N4/Hydroxyapatite Photocatalyst (from Oyster Shells) for the Degradation of Methylene Blue: Preparation, Properties and Mechanism

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