Solvothermal synthesis and enhanced CO 2 adsorption ability of mesoporous graphene oxide-ZnO nanocomposite

Li, Weidong; Jiang, Xia; Yang, Huayun; Liu, Qi

doi:10.1016/j.apsusc.2015.08.152

Cited by 34 publications

(18 citation statements)

References 28 publications

(25 reference statements)

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“…The enrichment of both targeted adsorbates and photo‐generated active species (e.g., electrons, holes, hydroxyl radicals, and superoxide radicals) on the 2D RGO or GO materials can finally realize the improved photoredox activity. More importantly, graphenes (N‐doped graphene in particular) also exhibit enhanced adsorption and activation of CO 2 molecules and H + , which make them especially suitable for photocatalytic CO 2 reduction and H 2 generation reactions …”

Section: Photocatalysis‐related Properties Of Graphene and Its Derivamentioning

confidence: 99%

Graphene in Photocatalysis: A Review

Wageh

et al. 2016

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In recent years, heterogeneous photocatalysis has received much research interest because of its powerful potential applications in tackling many important energy and environmental challenges at a global level in an economically sustainable manner. Due to their unique optical, electrical, and physicochemical properties, various 2D graphene nanosheets-supported semiconductor composite photocatalysts have been widely constructed and applied in different photocatalytic fields. In this review, fundamental mechanisms of heterogeneous photocatalysis, including thermodynamic and kinetics requirements, are first systematically summarized. Then, the photocatalysis-related properties of graphene and its derivatives, and design rules and synthesis methods of graphene-based composites are highlighted. Importantly, different design strategies, including doping and sensitization of semiconductors by graphene, improving electrical conductivity of graphene, increasing eloectrocatalytic active sites on graphene, strengthening interface coupling between semiconductors and graphene, fabricating micro/nano architectures, constructing multi-junction nanocomposites, enhancing photostability of semiconductors, and utilizing the synergistic effect of various modification strategies, are thoroughly summarized. The important applications including photocatalytic pollutant degradation, H production, and CO reduction are also addressed. Through reviewing the significant advances on this topic, it may provide new opportunities for designing highly efficient 2D graphene-based photocatalysts for various applications in photocatalysis and other fields, such as solar cells, thermal catalysis, separation, and purification.

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Section: Photocatalysis‐related Properties Of Graphene and Its Derivamentioning

confidence: 99%

Graphene in Photocatalysis: A Review

Wageh

et al. 2016

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943

401

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“…During the photocatalytic reduction of CO 2 , the photogenerated electrons were transferred from the CB of Cu 2 O to the surface of RGO which provided electrons to CO 2 molecules [139]. It was established that ZnO/GO nanocomposites, synthesized by a solvothermal method, exhibit enhanced adsorption ability on CO 2 compared to that of bare ZnO and GO, therefore they could form promising photocatalysts for the reduction of CO 2 [146]. 2D ZnO/RGO composites consisting of wrinkled GO sheets with nicely distributed ZnO nanoparticles on their surface exhibited remarkable photocatalytic activity (ZnO(10%wt)/RGO :263.1 μmol CH 3 OH /g * 3h), 5fold higher than that of bare ZnO (52.4 μmol CH 3 OH /g * 3h).…”

Section: Composite Photocatalysts Based On Graphene (Gr)mentioning

confidence: 99%

Alternative photocatalysts to TiO 2 for the photocatalytic reduction of CO 2

Nikokavoura

Trapalis

2017

Applied Surface Science

175

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“…According to Kemp et al [182], this happens by reason of the grafting of compatible functional groups onto graphene layers, thus giving rise to highly stable N-doped graphene composites with surface areas in the region of 1336 m 2 /g and reversible CO 2 capacity of 2.7 mmol/g at 298 K and 1 atm for repeated adsorption cycles. Oh et al [183] studied the performance of borane-modified graphene; they reported a CO 2 uptake of 1.82 mmol/g at 1 atm and 298 K. New hybrid systems such as mesoporous graphene oxide (mGO)-ZnO nanocomposite [184], mesoporous TiO 2 -graphene oxide nanocomposites [185], Mg-Al layered double hydroxide (LDH) graphene oxide [186], MOF-5-aminated graphite oxide (aGO) [187], UiO-66-graphene oxide composites [188], as well as MIL-53(Al)-graphene nanoplates (GNP) [189] have shown improved CO 2 adsorptive properties over their nonhybrid counterparts. Table 3 gives a summary of the advances made in different categories of carbon sequestration technologies.…”

Section: Adsorption: Packed Beds (Alumina/activated Carbon/ Zeolite)mentioning

confidence: 99%

Novel Systems and Membrane Technologies for Carbon Capture

Sanni

Sadiku

Okoro

2021

International Journal of Chemical Engineering

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Due to the global menace caused by carbon emissions from environmental, anthropogenic, and industrial processes, it has become expedient to consider the use of systems, with high trapping potentials for these carbon-based compounds. Several prior studies have considered the use of amines, activated carbon, and other solid adsorbents. Advances in carbon capture research have led to the use of ionic liquids, enzyme-based systems, microbial filters, membranes, and metal-organic frameworks in capturing CO2. Therefore, it is common knowledge that some of these systems have their lapses, which then informs the need to prioritize and optimize their synthetic routes for optimum efficiency. Some authors have also argued about the need to consider the use of hybrid systems, which offer several characteristics that in turn give synergistic effects/properties that are better compared to those of the individual components that make up the composites. For instance, some membranes are hydrophobic in nature, which makes them unsuitable for carbon capture operations; hence, it is necessary to consider modifying properties such as thermal stability, chemical stability, permeability, nature of the raw/starting material, thickness, durability, and surface area which can enhance the performance of these systems. In this review, previous and recent advances in carbon capture systems and sequestration technologies are discussed, while some recommendations and future prospects in innovative technologies are also highlighted.

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Solvothermal synthesis and enhanced CO 2 adsorption ability of mesoporous graphene oxide-ZnO nanocomposite

Cited by 34 publications

References 28 publications

Graphene in Photocatalysis: A Review

Graphene in Photocatalysis: A Review

Alternative photocatalysts to TiO 2 for the photocatalytic reduction of CO 2

Novel Systems and Membrane Technologies for Carbon Capture

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