Recent advancements of layered double hydroxide heterojunction composites with engineering approach towards photocatalytic hydrogen production: A review

Sherryna, Areen; Tahir, Muhammad Nawaz; Nabgan, Walid

doi:10.1016/j.ijhydene.2021.10.099

Cited by 52 publications

(19 citation statements)

References 213 publications

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“…In the last few decades, the method of converting solar to chemical energy has been known as an effective strategy to produce photocatalytic H 2 through water splitting in the presence of semiconductor-based photocatalysts. , Numerous photocatalyst semiconductors comprised of metal oxides, nitrides, or sulfides have been employed for photocatalytic H 2 production. Among those, TiO 2 based semiconductor photocatalysts have been extensively used due to their characteristics of appropriate band-edge configurations, higher stabilities, and lower costs. , MXenes (Ti 3 C 2 T x ) have been employed as effective cocatalysts over TiO 2 for enhanced photocatalytic H 2 production. In one study, Su et al employed Ti 3 C 2 T x as a cocatalyst over TiO 2 under light irradiation (285–325 nm).…”

Section: Mxene (Ti3c2t X ) Applications As Cocatalysts In Photocatalysismentioning

confidence: 99%

“…Among those, TiO 2 based semiconductor photocatalysts have been extensively used due to their characteristics of appropriate band-edge configurations, higher stabilities, and lower costs. 146,147 MXenes (Ti 3 C 2 T x ) have been employed as effective cocatalysts over TiO 2 for enhanced photocatalytic H 2 production. In one study, Su et al 141 employed Ti 3 C 2 T x as a cocatalyst over TiO 2 under light irradiation (285−325 nm).…”

Section: Mxene (Ti 3 C 2 T X ) Applications As Cocatalysts In Photoca...mentioning

confidence: 99%

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Titanium Carbide MXene Nanostructures as Catalysts and Cocatalysts for Photocatalytic Fuel Production: A Review

Tahir

Sherryna

Mansoor

et al. 2022

ACS Appl. Nano Mater.

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Efficient nanomaterials are in high demand in photocatalytic applications to maximize solar energy conversion to renewable fuels. There is growing research on the use of metals as cocatalysts to promote photocatalyst efficiency, but they are expensive. Recently, titanium carbide (Ti3C2T x ) MXenes as layered materials have attracted attention to investigate energy conversion applications. The distinguishing characteristics of Ti3C2T x are higher specific surface area, tunable terminal functional groups (−OH, −O, and −F), exposed metallic active sites, and excellent electrical conductivity. MXenes can be combined with other semiconductors as cocatalysts to improve charge carrier separation. This review discusses various synthesis routes to fabricate Ti3C2T x MXenes as single materials, their surface functionalization, and as cocatalysts to construct a heterojunction for photocatalytic CO2 conversion and H2 production. The different synthesis approaches, such as the HF, halogen, alkali, molten salt, and electrochemical etching routes, to regulate structure, morphology, and efficiency are systematically described. Moreover, synthesis of various morphologies of Ti3C2T x MXenes in terms of dimensions, sizes, and their effect on the performance of energy conversion reactions are systematically discussed. Furthermore, various synthesis routes with regard to fabrication of Ti3C2T x MXene-based nanocomposites for stimulating photocatalytic efficiency with solar energy is elaborated on. The critical analysis and discussion is included on select suitable structures and morphologies of MXenes as cocatalysts and as a support to stimulate the energy harvesting efficiency. Finally, a discussion related to challenges and further developments for exploring pathways in the contexts of synthesis and production of promising renewable fuels is presented.

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Section: Mxene (Ti3c2t X ) Applications As Cocatalysts In Photocatalysismentioning

confidence: 99%

Section: Mxene (Ti 3 C 2 T X ) Applications As Cocatalysts In Photoca...mentioning

confidence: 99%

Titanium Carbide MXene Nanostructures as Catalysts and Cocatalysts for Photocatalytic Fuel Production: A Review

Tahir

Sherryna

Mansoor

et al. 2022

ACS Appl. Nano Mater.

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“…In photocatalysis, the crystallinity of the materials is significant as it affects the directional flow of electrons for expediting the charge transfer. 168 It was disclosed that the optimal control of defects generates a higher hydrogen yield but with lower crystallinity than the pure structure. 169 Indicatively, the formation of defects through codoping could effectively trap the electrons and improve the optical response.…”

Section: Challenges In Engineering the Defects In G-c 3 Nmentioning

confidence: 99%

“…Besides, the crystallinity of the g-C 3 N 4 structure was also revealed to be interwoven with the defect concentrations. In photocatalysis, the crystallinity of the materials is significant as it affects the directional flow of electrons for expediting the charge transfer . It was disclosed that the optimal control of defects generates a higher hydrogen yield but with lower crystallinity than the pure structure .…”

Section: Challenges In Engineering the Defects In G-c3n4mentioning

confidence: 99%

Defect Engineering in Graphitic Carbon Nitride Nanotextures for Energy Efficient Solar Fuels Production: A Review

et al. 2022

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Excessive release of greenhouse gas carbon dioxide (CO2) into the atmosphere and continuous utilization of fossil fuels has resulted in global warming and energy shortage. Among the different alternatives, photocatalytic conversion of CO2 to fuels and hydrogen production is a promising approach. To achieve this goal, highly efficient and low-cost semiconductor are demanding to maximize solar energy conversion to renewable fuels. In this perspective, metal free two-dimensional (2D) graphitic carbon nitride (g-C3N4) has attracted numerous considerations because of its low cost and higher reduction potential, but it has a lower efficiency. Herein, we demonstrated various engineering defect strategies in g-C3N4 to promote photocatalytic efficiency under solar energy. Initially, an overview of engineering defects, creation of different vacancies in g-C3N4, and their identification is discussed. In the main stream defect, engineering such as carbon, nitrogen, and oxygen to promote g-C3N4 photocatalytic efficiency is systematically disclosed. Subsequently, the role of sulfur (S) and phosphorus (P) atoms in g-C3N4 to maximize CO2 reduction and hydrogen production are deliberated. The comparative analysis, efficiency enhancement, and role of defect engineering are finally discussed to get higher yields and productivities under solar energy utilization.

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“…Transition metal layered double hydroxides (LDHs), as a unique two-dimensional layered structure, have attracted extensive attention in the fields of photocatalysis and electrocatalysis in addition to their low cost, high specific surface area and high electrochemical activity, which provides a new way for photocatalytic hydrogen production. [22][23][24] M 2+ and M 3+ are two representative metal cations distributed uniformly in the LDH anion layer. [25][26][27][28] Typical LDH nanomaterials include NiFe-LDH, 29 CoAl-LDH, 30 and NiCo-LDH.…”

Section: Introductionmentioning

confidence: 99%

A novel type-II NiCo-LDH/CeO₂ heterojunction for highly efficient photocatalytic H₂ production

Liu

et al. 2022

New J. Chem.

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Recent advancements of layered double hydroxide heterojunction composites with engineering approach towards photocatalytic hydrogen production: A review

Cited by 52 publications

References 213 publications

Titanium Carbide MXene Nanostructures as Catalysts and Cocatalysts for Photocatalytic Fuel Production: A Review

Titanium Carbide MXene Nanostructures as Catalysts and Cocatalysts for Photocatalytic Fuel Production: A Review

Defect Engineering in Graphitic Carbon Nitride Nanotextures for Energy Efficient Solar Fuels Production: A Review

A novel type-II NiCo-LDH/CeO₂ heterojunction for highly efficient photocatalytic H₂ production

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Recent advancements of layered double hydroxide heterojunction composites with engineering approach towards photocatalytic hydrogen production: A review

Cited by 52 publications

References 213 publications

Titanium Carbide MXene Nanostructures as Catalysts and Cocatalysts for Photocatalytic Fuel Production: A Review

Titanium Carbide MXene Nanostructures as Catalysts and Cocatalysts for Photocatalytic Fuel Production: A Review

Defect Engineering in Graphitic Carbon Nitride Nanotextures for Energy Efficient Solar Fuels Production: A Review

A novel type-II NiCo-LDH/CeO2 heterojunction for highly efficient photocatalytic H2 production

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A novel type-II NiCo-LDH/CeO₂ heterojunction for highly efficient photocatalytic H₂ production