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•Large ring DB30C10 was immobilized for the preparation of mesoporous adsorbent.•High cesium adsorption was achieved due to the large number of coordination.•The carrier materials ...played an important role for the high cesium adsorption.
The work was designed for high cesium (Cs) adsorption from wastewater based on large ring size of dibenzo-30-crown-10-ether (DB30C10) immobilized mesoporous adsorbent. The Cs ion adsorption onto the mesoporous adsorbent from aqueous solution was investigated under the different experimental conditions such as reaction times, initial Cs ion concentrations, diverse competing ions and acidities. The Cs adsorption by mesoporous adsorbent was demonstrated at higher reaction rates than that of natural clay minerals. A superior correlation coefficient from the experimental and fitting values of the isotherm demonstrated that Cs ion adsorption on the mesoporous adsorbent was well fitted using the Langmuir isotherms model and exhibited the monolayer adsorption. The mesoporous adsorbent showed the high adsorption capacity as 107.16mg/g compared with the diverse crown ethers anchored adsorbent due to the large ring size of DB30C10 ligand. The effective surface area, adsorption capacity and encapsulation ability of mesoporous adsorbent were improved by the expanding ring size of DB30C10. The Cs adsorption by the mesoporous adsorbent was dependent on both pH and ionic strength of potassium (K) and sodium (Na). The presence of high amount K was adversely affected the Cs adsorption. On the other hand, the large amount of Na was slightly affected for Cs uptake. In addition, the adsorbent was reversible and kept remaining functionality after successful elution and regeneration using 0.25M HCl to reuse in multiple cycles without specific deterioration in its original performances. Hence, the newly large ring size based mesoporous adsorbent is a kind of potential and efficient material for high Cs adsorption from wastewater samples in Fukushima, Japan.
•The prepared probe was examined by UV–vis, fluorescence, mass and DFT studies.•A single probe colorimetrically sense Cu2+ and Al3+ and fluorometrically sense Fe3+.•Dissociation of probe-Al3+ complex ...involves the detection of AcO−/F−.•Provides the sequential detection of Al3+ and AcO−/F−.
A new rhodamine-derived Schiff base RH was synthesized and its sensing behavior toward various metal ions was investigated by UV–vis and fluorescence spectroscopic techniques. The sensor exhibited highly selective and sensitive colorimetric response to Cu2+ and Al3+, and “off–on” fluorescence response toward Fe3+ in semi-aqueous media. The spectral changes obtained are large enough in the visible region of the spectrum and thus enable naked-eye detection. Experimentally proved that the formation of RH–Al3+ complex is fully reversible and can sense to AcO−/F−via break the complex. The results revealed that the sensor offers the sequential detection of Al3+ and AcO−/F−.
Cryopreservation practices have become increasingly important within contemporary life sciences in recent decades, opening up the perspective of modifying and modulating temporal pathways and ...developmental cycles. Exploring the concept of “suspended life,” this article first focuses on temporal liminality as cryopreservation practices operate by extending the present. I rely on Niklas Luhmann’s account of time, which advances the idea of an enduring present bound to the principle of reversibility. The second part of this article engages with the emergence of cryobanks. Drawing on Martin Heidegger’s concept of the “standing-reserve” (Bestand), I conceive of cryobanks as storing facilities that ensure the disposition of organic material. The third section discusses the advent of a “politics of suspension” based on the proliferation of cryogenic life in contemporary societies, which is defined by reversibility and disposition. The conclusion sums up the main argument and briefly points to the social and political repercussions of this mode of governing the future by prolonging the present.
Abstract
The practical application of lithium‐rich layered oxides is prohibited by the drawbacks such as severe capacity and voltage degradation resulting from unstable oxygen redox environment and ...the accompanied irreversible oxygen release. Herein, a facile and effective strategy is proposed to regulate the oxygen redox chemistry via foreign Fe doping and its induced intrinsic transition metal (TM) doping as well as the in situ constructed spinel surface layer. The Fe doping, together with the induced intrinsic TM dual doping, can stabilize the lattice oxygen in the bulk due to the formed stronger FeO bond, and restrain the irreversible TM migration and then the undesirable phase transformation. More importantly, thermodynamical energy barrier of oxygen activation is dramatically decreased by the O 2p–Fe 3d charge‐transfer, allowing stable oxygen redox activity. And the pre‐constructed spinel layer can effectively stabilize the surface lattice oxygen and suppress harmful interfacial side‐reactions. Such a simple optimizing method make the modified cathode exhibit a high specific capacity of 298 mAh g
−1
at 0.2 C, outstanding cycling stability with a superior capacity and voltage retentions of 92.5% and 90.8%, respectively, after 400 cycles at 1 C. This study provides a new direction for developing advanced Li‐ion batteries.
The thermochromic phase change microcapsules (ETPCWs) are constructed by encapsulating ternary core composed of crystal violet lactone, bisphenol A and phase change wax into silica shell by in-situ ...condensation. It has good latent heat storage (∼130 J/g), high encapsulation efficiency (∼80%) and dual-output response (storage-release heat and thermochromic) produced by the solvent-modulated dissociation/aggregation mechanism. Upon heating, the ETPCWs exhibit light blue or even white, while return to dark blue when temperature decreases. Furthermore, thermochromic silicone rubber composites (TSRMs) are prepared by using ETPCWs as functional filler and silicone rubber as polymer matrix, which possess appropriate thermal regulation performance, improved thermal stability, favorable hydrophobicity, adjustable transparency and pleasurable mechanical properties. Especially, CIELAB color space values show that the TSRMs exhibit excellent thermochromic characteristics and outstanding recyclability. Therefore, this work provides a new idea for the development of functional phase change capsules, and the prepared thermochromic phase change microcapsule exhibits great application potential in security labels, intelligent electronic wearable devices as well as temperature sensors.
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•The prepared capsule consists of phase change wax core containing bisphenol A and crystal violet lactone and a silica shell.•The capsules present good latent heat ∼130 J/g, high encapsulation efficiency (∼80%) and reversible thermochromic performance.•The introduction of thermochromic capsules improved the thermal stability, mechanical properties of silicon rubber membranes.•The thermochromic capsules endow silicon rubber with good thermal regulation performance and thermochromic property.
Na‐CO2 Batteries
In the article number 2304365, Feng Liang and co‐workers controlled the relative concentration of H/O atoms at the catalyst/electrolyte interface by designing the electrolyte and ...establishing a reaction environment conducive to the generation of HCOOH. The hybrid Na‐CO2 battery, based on the discharge product of HCOOH, exhibits an ultra‐high discharge specific capacity and excellent cycle reversibility, especially low‐temperature cycle stability.
•A dual series of bromo- and fluoro-based α,β-unsaturated ketones were prepared and characterized.•CHB3 and CHF3 were potent MAO-B inhibitors with IC50 values of 0.0062 and 0.011 µM, ...respectively.•CHB3 and CHF3 were reversible competitive inhibitors of MAO-B.•The molecular interactions of CHB3 and MAO-B were studied by molecular docking and dynamics.•CHB3 can be a candidate therapeutic agent for neurological disorders, such as Parkinson's disease.
This study evaluated the synthesis of a dual series of bromo (CHB1–CHB4)- and fluoro (CHF1–CHF4)-based α,β-unsaturated ketones and their inhibitory activities against monoamine oxidase (MAO)-A and MAO-B. All compounds exhibited potent MAO-B inhibitory activities compared with the reference drugs. Among the CHB derivatives, CHB3 exhibited the highest potent inhibitory activity against MAO-B, with an IC50 value of 0.0062 µM, followed by CHB2 (IC50 = 0.013 µM), CHB4 (IC50 = 0.023 µM), and CHB1 (parent compound in the subseries, IC50 = 0.027 µM). Among the CHF derivatives, CHF3 demonstrated an efficient inhibitory activity against MAO-B, with an IC50 value of 0.011 µM, followed by CHF2 (IC50 = 0.037 µM), CHF1 (IC50 = 0.042 µM; parent compound in the subseries), and CHF4 (IC50 = 0.160 µM). CHB3 and CHF3 were found to be reversible competitive inhibitors of MAO-B, with Ki values of 0.0078 ± 0.0010 and 0.0068 ± 0.0012 µM, respectively. To confirm the promising action of CHB3, which is the most potent compound, the molecular basis of its interaction to MAO-B was studied by molecular docking and dynamics. The results suggested that CHB3 is a candidate therapeutic agent against neurological disorders, such as Parkinson's disease.
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Control of crystallography of metal electrodeposit films has recently emerged as a key to achieving long operating lifetimes in next‐generation batteries. It is reported that the large ...crystallographic heterogeneity, e.g., broad orientational distribution, that appears characteristic of commercial metal foils, results in rough morphology upon plating/stripping. On this basis, an accumulative roll bonding (ARB) methodology—a severe plastic deformation process—is developed. Zn metal is used as a first example to interrogate the concept. It is demonstrated that the ARB process is highly effective in achieving uniform crystallographic control on macroscopic materials. After the ARB process, the Zn grains exhibit a strong (002) texture (i.e., 002Zn//ND). The texture transitions from a classical bipolar pattern to a nonclassical unipolar pattern under large nominal strain eliminate the orientational heterogeneity of the foil. The strongly (002)‐textured Zn remarkably improves the plating/stripping performance by nearly two orders of magnitude under practical conditions. The performance improvements are readily scaled to achieve pouch‐type full batteries that deliver exceptional reversibility. The ARB process can, in principle, be applied to any metal chemistry to achieve similar crystallographic uniformity, provided the appropriate temperature and accumulated strains are employed. This concept is evaluated using commercial Li and Na foils, which, unlike Zn (HCP), are BCC crystals. The simple process for creating strong textures in both hexagonal and cubic metals and illustrating the critical role such built‐in crystallography plays underscores opportunities for developing highly reversible thin metal anodes (e.g., hexagonal Zn, Mg, and cubic Li, Na, Ca, Al).
The large crystallographic heterogeneity, e.g., broad orientational distribution, characteristic of commercial metal foils results in rough electrodeposit morphology in either metal plating/stripping processes. An accumulative roll bonding (ARB) methodology is reported to achieve uniform crystallographic control on macroscopic materials. Electrochemical analysis shows that ARB can produce large improvements in reversibility of metal anodes.
This study developed pH-indicator films by combining esterified cellulose nanocrystals (e-CNCs) with activated bromocresol purple (a-BCP) via covalent bonding for pH-sensitive color-changing ...applications. The e-CNC/a-BCP particles were incorporated into cellulose acetate polymer to prepare pH-sensitive color changing films. Binding of a-BCP to e-CNCs was proven by attenuated total reflection infrared (ATR-IR) spectroscopy and X-ray photoelectron spectroscopy (XPS). Colorimetric analysis showed that films containing 10% or 15% e-CNC/a-BCP particles had critical color changes either at pH 4–5, or pH 7–8. The films with 10% e-CNC/a-BCP particles also revealed excellent leaching resistance under acidic conditions. Color changes were reversible between pH 2 and 10. These pH-indicator films had visible color changes in response to pH variations, color reversibility, leaching resistance, and sufficient rigidity even though mechanical properties decreased as the e-CNC/a-BCP content increased from 0% to 15%.
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•Activated bromocresol purple was applied as a pH-sensitive part of pH-responsive indicator films.•Esterified cellulose nanocrystals were employed as a carrier for activated bromocresol purple.•The films had critical pH ranges of 4– 5 and 7– 8 for color change.•The pH-responsive indicator films revealed an excellent leaching resistance under acidic conditions.•The pH-responsive indicator films exhibited good color reversibility at pH 2 and pH 10.
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