Photoreduction of carbon dioxide of atmospheric concentration to methane with water over CoAl-layered double hydroxide nanosheets

Wang, Kefu; Zhang, Ling; Su, Yang; Shao, Dengkui; Zeng, Shuwen; Wang, Wenzhong

doi:10.1039/c8ta01309h

Cited by 106 publications

(81 citation statements)

References 43 publications

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“…[20d] Recently, Wang and co-workers also found the different performance of LDHs-based photocatalysts by tuning elemental composition in the host layers (CoAl-LDH, NiAl-LDH, ZnAl-LDH, CoCr-LDH and CoFe-LDH). [21] Among them, CoAl-LDH achieved highest performance with a CH 4 production rate of 4.3 mmol g À 1 h À 1 production under low concentration of CO 2 and without deactivation even after 55 hours. Thus, rational tuning the elemental composition in the host layers is a useful method to enhance the activity and selectivity of CO 2 PR.…”

Section: Morphology and Compositionmentioning

confidence: 95%

Recent Progress on Nanostructured Layered Double Hydroxides for Visible‐Light‐Induced Photoreduction of CO₂

Tan

Wang

Zhao

et al. 2020

Chemistry An Asian Journal

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Photoreduction of CO 2 into solar fuels is usually regarded as one of the promising solutions to overcome environmental pollution and the energy crisis. The main challenge in CO 2 photoreduction (CO 2 PR) is the low efficiency and poor selectivity. Layered double hydroxides (LDHs) are a class of 2D materials, consisting with M(OH) 6 octahedra in the host layers and intercalated anions. Owing to the tuneable composition, particle size, morphology, and virtue coordinatively unsaturated active sites, a series of efficient strategies (morphology control, heterostructure, defect control, etc.) in LDH-based photocatalysts have been efficiently developed to enhance the photocatalytic selectivity and activity for CO 2 PR. This review summarizes recent progress on the LDH-based photocatalysts for CO 2 PR. Al 3 + and transition metal elements, Fe 2 + , Co 2 + , Ni 2 + , Zn 2 + , Cr 3 + , Fe 3 + , etc.) in the laminate layers and A nÀ is the interlaminated anion (such as: NO 3 À , CO 3 2À and SO 4 2À , etc.) in the interlayer. [6b,c,7] It has been widely applied in photocatalyst in the past decades. [8] Ascribe to the tunable atomic structure, the bandgap of LDHs can be tuned from 2.0 eV to 5.4 eV by changing the composition of layer. [9] Moreover, the surface defects (such as: V M , metal vacancy and V OH , hydroxyl vacancy, etc.) as active sites in photocatalysis can be easily introduced by controlling the thickness and size of LDHs etc., thus promoting the efficiency of CO 2 PR. This review focuses on the recent development of the LDHs-based photocatalysts for CO 2 PR, and the corresponding progress of CO 2 PR has achieved great progress from the former CO 2 conversion rate of~1 μmol g À 1 h À 1 to recent 218130 μmol g À 1 h À 1 , and the desirable valuable-product also move from CO to CH 4 and methanol. The major strategies of promoting the CO 2 PR are discussed from different perspective from the morphology and composition, electronic structure, and defects structure for further understanding the relationship between the structure and activity.

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Section: Morphology and Compositionmentioning

confidence: 95%

Recent Progress on Nanostructured Layered Double Hydroxides for Visible‐Light‐Induced Photoreduction of CO₂

Tan

Wang

Zhao

et al. 2020

Chemistry An Asian Journal

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“…The band at 3458 cm À 1 was caused by the stretching vibration of the hydroxy groups in the hydroxide layer and the interlayer water molecules, whereas the band at 1648 cm À 1 should be attributed to water bending. [33,47] For Co/M II Fe LDHs with CO 3 2À intercalation, there was a strong absorption peak at around 1385 cm À 1 , which was attributed to asymmetrical stretching vibration peak of intercalated CO 3…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

“…The absorption below 500 nm was ascribed to ligand-to-metal charge transfer (LMCT), O 2p to M II 3d and Fe III 3d (O 2p!M 3d t 2g ) in the MO 6 octahedron of LDHs ( Figure S8). [47,52] The peak above 500 nm was attributed to metal-to-metal charge transfer (MMCT) of M II À O-Fe III oxobridged bimetallic bonds in brucite layer. [29,39] The charge transfer efficiency of various oxo-bridged structures was distinct, which led to different light absorption and utilization.…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

Photocatalytic H₂ Evolution from Ammonia Borane: Improvement of Charge Separation and Directional Charge Transmission

Zhang

Cheng

et al. 2020

ChemSusChem

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Co/M II Fe layered double hydroxide (LDH) LDH photocatalysts have been designed from the aspect of employing stable halffilled Fe 3 + to trap photogenerated electrons, adjusting the M II À OÀ Fe oxo-bridged structure to optimize the short-range directional charge transmission and intercalating oxometallate anions into the LDH to further improve light absorption along with electron-hole separation and non-noble metal Co NP loading and reduction to form a heterojunction. These LDHbased photocatalysts are employed for photocatalytic H 2 evolution from ammonia borane in aqueous solution under visible light at 298 K. The photocatalytic H 2 evolution activity is greatly improved through adjustment of the M II À OÀ Fe oxobridged structure and molybdate intercalation into the LDH. Turnover frequencies of up to 113.2 min À 1 are achieved with Co/CoFeÀ Mo. Alongside the experimental results and materials characterization, capture experiments and in situ DRIFTS analysis are carried out to study the photocatalytic hydrogen production mechanism.

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“…The fabricated CoAl LDH facilitated an enhanced CO 2 photoreduction reaction when compared to P25 due to the surface alkaline OH groups for efficient adsorption of CO 2 at a low concentration. 99 The utilisation of LDH in CO 2 photoreduction has been reviewed previously, and thus, interested readers may refer to the published review articles. 40,122 In summary, metal oxides have shown their ability to promote photocatalytic reduction of CO 2 , as discussed in the previous section.…”

Section: Oxidesmentioning

confidence: 99%

A review of nanostructured non-titania photocatalysts and hole scavenging agents for CO₂ photoreduction processes

Tan

Maroto‐Valer

2019

J. Mater. Chem. A

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Photoreduction of carbon dioxide of atmospheric concentration to methane with water over CoAl-layered double hydroxide nanosheets

Abstract: High CH4 selectivity for the photoreduction of CO2 of atmospheric concentration on CoAl-LDHs.

Cited by 106 publications

References 43 publications

Recent Progress on Nanostructured Layered Double Hydroxides for Visible‐Light‐Induced Photoreduction of CO₂

Recent Progress on Nanostructured Layered Double Hydroxides for Visible‐Light‐Induced Photoreduction of CO₂

Photocatalytic H₂ Evolution from Ammonia Borane: Improvement of Charge Separation and Directional Charge Transmission

A review of nanostructured non-titania photocatalysts and hole scavenging agents for CO₂ photoreduction processes

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Photoreduction of carbon dioxide of atmospheric concentration to methane with water over CoAl-layered double hydroxide nanosheets

Abstract: High CH4 selectivity for the photoreduction of CO2 of atmospheric concentration on CoAl-LDHs.

Cited by 106 publications

References 43 publications

Recent Progress on Nanostructured Layered Double Hydroxides for Visible‐Light‐Induced Photoreduction of CO2

Recent Progress on Nanostructured Layered Double Hydroxides for Visible‐Light‐Induced Photoreduction of CO2

Photocatalytic H2 Evolution from Ammonia Borane: Improvement of Charge Separation and Directional Charge Transmission

A review of nanostructured non-titania photocatalysts and hole scavenging agents for CO2 photoreduction processes

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Recent Progress on Nanostructured Layered Double Hydroxides for Visible‐Light‐Induced Photoreduction of CO₂

Recent Progress on Nanostructured Layered Double Hydroxides for Visible‐Light‐Induced Photoreduction of CO₂

Photocatalytic H₂ Evolution from Ammonia Borane: Improvement of Charge Separation and Directional Charge Transmission

A review of nanostructured non-titania photocatalysts and hole scavenging agents for CO₂ photoreduction processes