Mechanically intensified and stabilized MXene membranes via the combination of graphene oxide for highly efficient osmotic power production

Wang, Fukai; Wang, Zhaoyi; Wang, Saidi; Meng, Xiuxia; Jin, Yun; Yang, Naitao; Sunarso, Jaka; Liu, Shaomin

doi:10.1016/j.memsci.2022.120280

Cited by 33 publications

(13 citation statements)

References 52 publications

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“…The introduced TA could migrate through the MXene layers and glue together to prevent the layer-restacking, and the introduced rGO could overcome the brittleness of MXene lms and improve the exibility of the as-prepared composite lm. 67 As shown in Fig. S10a, † strong characteristic vibrations of C-O (1204 cm −1 ) and stretching vibration of C]O (1700 cm −1 ) derived from TA could be observed in FT-IR spectra of the Ti 3 C 2 T x /rGO/TA 10/1/5 composite lms, indicating that TA was successfully introduced.…”

Section: Resultsmentioning

confidence: 85%

Ultrahigh conductivity and antifreezing zwitterionic sulfobetaine hydrogel electrolyte for low-temperature resistance flexible supercapacitors

et al. 2023

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Section: Resultsmentioning

confidence: 85%

Ultrahigh conductivity and antifreezing zwitterionic sulfobetaine hydrogel electrolyte for low-temperature resistance flexible supercapacitors

et al. 2023

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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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“…Recent studies have explored MXene (titanium carbide, Ti 3 C 2 T X ), a new class of two-dimensional (2D) materials that consists of layers of transition metal/carbides, nitrides, or carbonitrides . The 2D MXene materials have been widely used in battery electrodes, − ion separation, − energy storage, − water treatment, − and gas separation. , MXene materials are also expected to play an important role in gas separation given their mechanical stability and unique layered structure. , Besides that, catalysts are essential in the NH 3 decomposition reaction, and the supported catalyst should have low activity at low temperatures . In other words, using appropriate additives can enhance the activity of the catalyst and reduce the reaction temperature .…”

Section: Introductionmentioning

confidence: 99%

Membrane Reactor Supported by MXene (Ti₃C₂T_X) for Hydrogen Production by Ammonia Decomposition

Jin

Fan

et al. 2023

Energy Fuels

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Hydrogen (H 2 ) production by ammonia (NH 3 ) decomposition offers a solution to the energy problem. In this work, an MXene (titanium carbide, Ti 3 C 2 T X ) membrane was successfully synthesized by depositing it onto the anodic aluminum oxide (AAO) substrate using vacuum-assisted filtration. Then, a membrane reactor supported by MXene was developed for H 2 production by NH 3 decomposition. The MXene membrane reactor could achieve an H 2 permeance of 2.85 × 10 −7 mol m −2 s −1 Pa −1 and an H 2 / N 2 selectivity of 20 at 773.15 K. Next, a Ni-La/γ-Al 2 O 3 catalyst prepared by impregnation and sintering was added to catalyze the NH 3 decomposition process. The experimental results showed that the reactor could achieve a 99% NH 3 conversion at 773.15 K, i.e., 9% higher than that of the packed catalytic reactor (without membrane). A mathematical model of the membrane reactor was developed to explain the experimental results. The calculated activation energies (E ad ) of the MXene membrane for H 2 and N 2 permeances were 64.95 and 69.53 kJ mol −1 , respectively. The activation energy (E ar ) of NH 3 decomposition was 147.8 kJ mol −1 . Both the experimental and modeling results showed that the membrane reactor could enhance NH 3 conversion and promote the production of high-purity H 2 .

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Mechanically intensified and stabilized MXene membranes via the combination of graphene oxide for highly efficient osmotic power production

Cited by 33 publications

References 52 publications

Ultrahigh conductivity and antifreezing zwitterionic sulfobetaine hydrogel electrolyte for low-temperature resistance flexible supercapacitors

Ultrahigh conductivity and antifreezing zwitterionic sulfobetaine hydrogel electrolyte for low-temperature resistance flexible supercapacitors

Ion-Exchanging Graphenic Nanochannels for Macroscopic Osmotic Energy Harvesting

Membrane Reactor Supported by MXene (Ti₃C₂T_X) for Hydrogen Production by Ammonia Decomposition

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Mechanically intensified and stabilized MXene membranes via the combination of graphene oxide for highly efficient osmotic power production

Cited by 33 publications

References 52 publications

Ultrahigh conductivity and antifreezing zwitterionic sulfobetaine hydrogel electrolyte for low-temperature resistance flexible supercapacitors

Ultrahigh conductivity and antifreezing zwitterionic sulfobetaine hydrogel electrolyte for low-temperature resistance flexible supercapacitors

Ion-Exchanging Graphenic Nanochannels for Macroscopic Osmotic Energy Harvesting

Membrane Reactor Supported by MXene (Ti3C2TX) for Hydrogen Production by Ammonia Decomposition

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Product

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Membrane Reactor Supported by MXene (Ti₃C₂T_X) for Hydrogen Production by Ammonia Decomposition