Two-dimensional lamellar MXene/three-dimensional network bacterial nanocellulose nanofiber composite Janus membranes as nanofluidic osmotic power generators

Xu, Yanglei; Chen, Sheng; Zhang, Xiao; Chen, Yanglei; Li, Deqiang; Xu, Feng

doi:10.1016/j.electacta.2022.140162

Cited by 18 publications

(9 citation statements)

References 35 publications

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“…As evident from the figure, electric eels outperform all artificial RED systems in the context of large-area power conversion. Several 2D/3D macroscopic systems such as MXene-GO composite, MXene-bacterial cellulose composite, metal–organic frameworks, covalent–organic frameworks, etc., have higher power densities in comparison to this work, as shown in Figure . However, such reports lack discussion on ion transference number or energy efficiency at the highest recorded power density.…”

Section: Resultsmentioning

confidence: 99%

Ion-Exchanging Graphenic Nanochannels for Macroscopic Osmotic Energy Harvesting

Nagar

Islam

Joshua

et al. 2022

ACS Sustainable Chem. Eng.

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The Gibbs free energy difference between seawater and river water can be tapped by selective ion transport across charged nanochannels, referred to as reverse electrodialysis (RED). However, existing single pore and micro/nanofluidic RED systems have shown poor prospects for scalability and practical implementation. Herein, we present a macroscopic RED system, utilizing a cation-selective membrane or an anion-selective membrane. The membranes comprise reduced graphene oxide (rGO) nanosheets decorated uniformly with TiO2 nanoparticles. The nanosheets are covalently functionalized with polystyrene (PS) and subsequently linked to sulfonate or quaternary amine functional groups to obtain cation and anion selectivity, respectively. The membranes show excellent ion transport properties along with high power densities demonstrated under artificial salinity gradients. The cation-exchange membrane (CEM) delivered a power density of 448.7 mW m–2 under a 500-fold concentration gradient, while the anion-exchange membrane (AEM) produced a substantial power output of 177.8 mW m–2 under a similar gradient. The efficiencies ranged from 10.6% to 42.3% for CEM and from 9.7% to 46.1% in the case of AEM. Testing under varying pH conditions revealed higher power output under acidic conditions and substantial power output across the entire pH range, rendering them practically viable for sustainable energy harvesting in acidic and alkaline wastewaters.

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Section: Resultsmentioning

confidence: 99%

Ion-Exchanging Graphenic Nanochannels for Macroscopic Osmotic Energy Harvesting

Nagar

Islam

Joshua

et al. 2022

ACS Sustainable Chem. Eng.

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“…Xu et al have fabricated a double-layered heterogeneous MXene/bacterial nanocellulose (BNC) Janus membrane via vacuum filtration . This work demonstrated the phenomena of asymmetric cation transportation in the nanoconfined slits, and the mobility of the ion was influenced by an electric field from 2D slits to three-dimensional (3D) networks.…”

Section: Energy Applications Of Mxenes Using Fluid Manipulation Techn...mentioning

confidence: 97%

Minireview on Fluid Manipulation Techniques for the Synthesis and Energy Applications of Two-Dimensional MXenes: Advances, Challenges, and Perspectives

Richard

Thomas²,

et al. 2023

Energy Fuels

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A new frontier in the design and applications of useful micro- and nanomaterials was unlocked by the combination of fluid mechanics with modern engineered technologies. Fluidic methods allow for the exact and active spatiotemporal manipulation of matter, which has enormous potential for the fabrication of advanced nanoplatforms with flexible material characteristics. Fluidic technologies bestow some advantages over conventional experimental methods, such as quick sample processing and precise fluid control during assays. When combined with different two-dimensional (2D) materials, these fluidic techniques opened up a new era in the area of material science and engineering. MXenes, the youngest family of layered 2D materials, have attracted great scientific attention as a result of their peculiar properties and are used for a multitude of applications. This review discusses the magnificent relationship between MXenes and fluid manipulation technique nanofluidics in the domain of energy research. This article proclaims a concise review of the synthesis, energy applications, challenges, and future outlook of MXenes in fluidic research. An emphasis is given to the applications of MXene-based fluidic techniques in the field of energy harvesting and storage. This analysis will provide anew insight into MXenes in the field of fluid manipulation techniques that followed custom approaches in the past and researchers to move toward a new direction in the future. This examinative article will fill a major gap in fluidic research in the world of materials. And to the best part of our perception, this is the first review that offers an overview of the combination of fluidics and MXenes for application, particularly in energy harvesting and storage devices.

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“…Since nuclear power facing negative public opinion, researchers are turning their attention to develop renewable and sustainable energy sources that could be safe, reproducible, and ecological, such as solar, wind, and hydro power. , During last decades, the osmotic energy generation (a.k.a. blue energy or salinity gradient energy) is considered an environmentally friendly and low-carbon technology for sustainable power generation. − Driven by the Gibbs free energy of high concentration seawater and freshwater mixing, the counterions preferentially pass through the ion-selective channels within the semipermeable membrane, thereby directly generating electricity . From above respect, the membrane properties, such as water permeability, ion diffusion rate, and membrane stability in saline solution (e.g., seawater) are the keys to osmotic energy generation (OEG) technology.…”

Section: Introductionmentioning

confidence: 99%

A Novel Thin Film Composite Membrane for Osmotic Energy Generation

et al. 2023

Ind. Eng. Chem. Res.

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A novel thin film composite (TFC) membrane was developed to simultaneously achieve high energy density and mechanical robustness for osmotic energy generation (OEG). The composite membrane is composed of a poly(vinyl alcohol) (PVA) aerogel substrate and a thin sulfonated poly(ether ether ketone)/graphene (SPEEK/G) top layer. The PVA support offers excellent mechanical stability, flexibility, and high water permeability, and the mixed matrix skin layer amplifies the differential diffusion rates of cations and anions across the TFC membrane. As a result, the TFC membrane manages to achieve a high power density of ca. 5.89 W m–2 under a salinity gradient of 50 (0.5 M|0.01 M, NaCl). Furthermore, the energy generation device can maintain the high power output for 4 days or under 300 P pressure, indicating excellent long-term stability and mechanical durability. The work thus provides a new membrane technology to prepare high-performance materials for osmotic energy harvesting application.

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Two-dimensional lamellar MXene/three-dimensional network bacterial nanocellulose nanofiber composite Janus membranes as nanofluidic osmotic power generators

Cited by 18 publications

References 35 publications

Ion-Exchanging Graphenic Nanochannels for Macroscopic Osmotic Energy Harvesting

Ion-Exchanging Graphenic Nanochannels for Macroscopic Osmotic Energy Harvesting

Minireview on Fluid Manipulation Techniques for the Synthesis and Energy Applications of Two-Dimensional MXenes: Advances, Challenges, and Perspectives

A Novel Thin Film Composite Membrane for Osmotic Energy Generation

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