IONICS
·
2026
·
IF 3.4
Huang Dandan,Ouyang Quan,Guo Pingchun,Jiang Hedong
Zn-ion batteries (ZIBs) have attracted considerable attention as promising energy storage systems owing to their natural abundance, low standard electrode potential (-0.76 V), and high theoretical capacity (820 mAh g − 1 ). Nevertheless, their practical application is severely hindered by Zn dendrite growth, hydrogen evolution, and electrode passivation. To address these challenges, we constructed a Zn-based vermiculite coating on Zn anodes (Ver@Zn), which reduces the direct exposure of Zn to the electrolyte and suppresses side reactions and passivation layer formation. Owing to its unique Zn 2+ interlayer channels and electronic insulating properties, the vermiculite coating facilitates uniform Zn 2+ migration and nucleation, thereby enabling homogeneous Zn deposition. As a result, the modified Zn anode exhibited enhanced corrosion resistance and higher Coulombic efficiency (CE). The vermiculite particle with optimized size (45–61 μm) yielded the best cycling stability, with a symmetric cell lifetime of up to 1700 h, far exceeding that of bare Zn. Furthermore, the Ver@Zn anode delivered superior performance in Zn/I 2 full cells, maintaining high specific capacity, rate capability, and long-term cycling stability (98% capacity retention after 3000 cycles) with CE of 99.8%. This work demonstrates an effective surface engineering strategy for advancing high-performance aqueous Zn iodine battery.
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JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Sen Li
The design of effective phenol adsorbents remains an important issue in industrial wastewater treatment. This study develops amide-containing gemini surfactants to modify vermiculite (G8-NE-VT, G8-OL-VT and G12-NE-VT) for phenol adsorption. Guided by “functional connector” strategy, longer alkyl chains in G12-NE-VT contribute to looser surfactant packing and greater hydrophobicity, while functional groups in the spacer of G8-OL-VT improve interaction density and adsorption performance. The adsorption of phenol follow the order of: G8-OL-VT (160.78 mg/g) > G12-NE-VT (111.06 mg/g) > G8-NE-VT (80.82 mg/g). The highest adsorption amounts are obtained on G8-OL-VT (274.23 mg/g). All the adsorption processes are fitted well by pseudo-second-order kinetic model and Redlich-Peterson isotherm. Exothermic adsorption character involves hydrophobic interactions, hydrogen bonding, π-π stacking, and electrostatic interactions between phenol and organo-VT. Shorter alkyl chains enhance the role of additional interactions for phenol retention. Moreover, the applicability of G8-OL-VT is demonstrated by reliable regeneration and high selectivity. Results in this work focus on achieving high adsorption capacity and advancing material design for pollutant treatment, as well as overcome the challenges associated with phenol’s intrinsic polarity and hydrophilia, resulting in superior adsorption performance compared to conventional adsorbents.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
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IF 9
Junyan Ma,Xingya Huang,Aokun Li,Jingjing Chen,Xiaoli Wu,Jingtao Wang
Nanochannel-molecule interactions are of paramount importance for molecule transport in confined nanochannels. Except for molecular solubility parameter, molecular dipole moment highly affects the electrostatic interactions with charged nanochannels, but its influence on molecule transport has yet been elucidated. The precise molecule separation based on dipole moment difference is therefore rarely reported. Herein, vertically-aligned nanochannel membranes with tunable charge properties were fabricated, the charge intensity of which was adjusted by regulating various functional groups ( CH 3 , NH 2 , F 3 ). Based on these robust and long-range 2D nanochannels, the influence of molecule dipole moment on its transport behaviors is explored for the first time. We demonstrate that compared with non-polar molecules, polar molecules with obvious dipole are induced to generate an induced dipole moment (D id ) in charged nanochannels. Molecules with small intrinsic dipole moments (D in ) exhibit a high dipole variation (over 73.5%) caused by the electrostatic interaction, leading to a high dependence of their permeance on the charge intensity of nanochannels. In contrast, molecules with large intrinsic dipole moments display negligible dipole variation (below 7.9%), and their permeance shows weak fluctuations to the charge intensity of nanochannels. Furthermore, we reveal that the total dipole moment (D t ) dominates the electrostatic interaction strength of molecules with the charged nanochannels, which affects the transport permeance. The permeance adheres to the formula: P = k 1 μ D t 2 r 0.5 V ( μ , viscosity; D t , total dipole moment; r , molecule diameter; V , charge intensity of nanochannel). Accordingly, a high separation factor of 8.36 for ethanol/water is achieved for charged membrane.
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ELECTROCHIMICA ACTA
·
2023
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IF 6.6
Yingdong Yang,Bin Yang,Mengning Luo,Yuqing Yang,Yang Wang,Jibin Miao,Shun Wang,Zhengzhi Zheng,Jiasheng Qian,Ru Xia,Yuchao Ke,Youlei Tu
In this study, polyvinylidene difluoride (PVDF) lithium battery (LIB) separators were prepared by nonsolvent- induced phase separation (NIPS) technique, and effect of vermiculite nano-sheets (VNs) on the performance of PVDF separator was studied by altering the proportions of VNs added. The microscopic morphologies of PVDF films were observed by scanning electron microscope (SEM), and it was found that the incorporation of two-dimensional VNs greatly improved the thermodynamic instability of PVDF/N, N-dimethylacetamide (DMAc) solution, which further induced the formation of long finger-like pore structure , leading to improved porosity and electrolyte uptake rate of the prepared separators. Meanwhile, differential scanning calorimeter (DSC) analysis showed that the presence of VNs decreased PVDF's crystallinity and greatly improved the thermal stability of the separators primarily owing to VNs’ two-dimensional structure as well as excellent thermal stability. When the VNs content reached 7.0 wt%, the ionic conductivity of the separator increased from 0.300 mS⋅cm −1 to 1.679 mS⋅cm −1 , coupled with significant improvement in both mechanical properties and battery performance. The present study provides a facile method for preparing LIB separators with high safety and superior performance.
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Nanomaterials
·
2022
·Vol. 12
·期 20
·3636
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IF 5.719
Jianchao Gong,Tingting Wang,Wei Zhang,Lin Han,Mingxiao Gao,Tianen Chen,Tao Shen,Yaxiong Ji
To explore the effect of spacer structure on the adsorption capability of organo-vermiculites (organo-Vts), a series of aza-containing gemini surfactants (5N, 7N and 8N) are applied to modify Na-vermiculite (Na-Vt). Large interlayer spacing, strong binding strength and high modifier availability are observed in organo-Vts, which endow them with superiority for the adsorption of 2-naphthol (2-NP) and bromophenol blue (BPB). The maximum adsorption capacities of 5N-Vt, 7N-Vt and 8N-Vt toward 2-NP/BPB are 142.08/364.49, 156.61/372.65 and 146.50/287.90 mg/g, respectively, with the adsorption processes well fit by the PSO model and Freundlich isotherm. The quicker adsorption equilibrium of 2-NP than BPB is due to the easier diffusion of smaller 2-NP molecules into the interlayer space of organo-Vts. Moreover, stable regeneration of 7N-Vt is verified, with feasibility in the binary-component system that is demonstrated. A combination of theoretical simulation and characterization is conducted to reveal the adsorption mechanism; the adsorption processes are mainly through partition processes, electrostatic interaction and functional interactions, in which the spacer structure affects the interlayer environment and adsorptive site distribution, whereas the adsorbate structure plays a role in the diffusion process and secondary intermolecular interactions. The results of this study demonstrate the versatile applicability of aza-based organo-Vts targeted at the removal of phenols and dyes as well as provide theoretical guidance for the structural optimization and mechanistic exploration of organo-Vt adsorbents.Keywords:organo-vermiculite;aza-containing gemini surfactant;2-Naphthol;bromophenol blue;adsorption
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Lin Han,Tingting Wang,Jianchao Gong,Xin Li,Yaxiong Ji,Shifeng Wang
To address the competitive adsorption of complex wastewater components on organo-vermiculites (organo-Vts), multi-hydroxy containing gemini surfactants varying in alkyl chain length (G 12 , G 14 and G 16 ) are designed and applied for modifying Na-vermiculite (Na-Vt) targeted to the removal of co-existing MB and Pb(II). Organo-Vts exhibit enhanced hydrophobicity and enlarged interlayer spacing compared with Na-Vt, with the saturated modifier dosage reaching as low as 0.4 CEC of Na-Vt. Shorter alkyl chain induces suitable packing density and interlayer environment, endowing G 12 -Vt the highest adsorption capacity towards MB/Pb(II) compared with G 14 -Vt and G 16 -Vt (178.3/63.0 mg/g compared with 143.7/38.1 and 88.6/36.6 mg/g, respectively). Freundlich isotherm and PSO kinetic model are agreeable (the values of R 2 are higher than 0.98) with the endothermic adsorption processes . Notably, a simultaneous effect in binary-component system is obtained, and the maximum adsorption capacities of G 12 -Vt towards MB/Pb(II) reaching 349.9 and 124.5 mg/g, which are 1.96 and 1.95 times higher than single-component system, respectively. Combination of theoretical fitting and molecular simulation co-reveals the adsorption mechanism: the simultaneous effect is due to the providing of additional active sites by the adsorbed MB, which is stronger than that between Pb(II) and the modifier. Existence of π-ion interaction enhances the retention of Pb(II) for a further step. This work broadens a new research perspective for complex wastewater treatment and provides a deep understanding of the stimulative adsorption mechanism between dyes and metal ions .
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SEPARATION SCIENCE AND TECHNOLOGY
·
2022
·
IF 2.799
Yaxun Sun,Xin Li,Tingting Wang,Yaxiong Ji,Yihang Yue,Yong Li,Shifeng Wang
In this study, a multi-hydroxyl-containing gemini surfactant 1,4-bis(hexadecyldimethylammonio)-2,3-dihydroxylbutane dibromide (BHHB) is firstly introduced to modify vermiculite (Na-Vt) for 2-naphthol adsorption. Successful functionalization is verified from the enhanced hydrophobicity, increased organic carbon content, enlarged interlayer spacing and decreased surface area of BHHB-Vt over Na-Vt, constructing favorable structural microenvironments for 2-naphthol retention. Effective adsorptivity and excellent reusability are obtained from the comparison of BHHB-Vt (198.16 mg/g) over Na-Vt (43.26 mg/g C0 = 300 mg/L, V = 30 mL, m = 0.03 g, t = 3 h). Partition process, hydrogen bond, OH-π interaction and electrostatic attraction are responsible for the adsorption, where OH-π interaction is stronger than hydrogen bond. The agreement of pseudo-second order and Langmuir models indicate a chemical adsorption feature on homogeneous surface. Notably, hydrogen groups connected at different carbon atoms exhibit less steric hindrance and wider molecule orbitals, providing stronger interactions between the adsorbent and targeted organic pollutant.
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CHEMOSPHERE
·
2022
·
IF 8.943
Tao Shen,Tong Han,Qing Zhao,Fan Ding,Shanshan Mao,Manglai Gao
To pursue the adsorptivity of versatile vermiculite (Na-Vt)-based adsorbent targeted at emerging pharmaceuticals (mefenamic acid and ibuprofen, corresponding to MEA and IBP, respectively), a quinoline-based gemini surfactant (DHQU) with multi-functional groups is applied as modifier on Na-Vt. Enhanced hydrophobicity , enlarged interlayer space and decreased surface area of DHQU-Vt are obtained, whose modifier availability (the mole ratio of modifier intercalated to added) reaches up to 84.18% as characterized by FT-IR, XRD , TG-DTG, EA and BET analysis. Efficient adsorption of MEA/IBP (123.71/240.69 mg/g) is achieved under an extremely low DHQU dosage (0.2 CEC lower than the usual saturated dosage of organo-Vts), with all the processes fitting satisfactorily with pseudo-second order and Freundlich isotherm models accompanied by an exothermic nature. Acid pickling testifies a stable and reliable reusability process of DHQU-Vt even after 3 cycles. Multiple interactions (i.e., partition process, XH-π interaction, π-π interaction, π-π stacking and electrostatic interaction) are revealed and compared from not only characterization results, but also simulation of frontier orbital analysis, the adsorption configuration and bonding analysis: (i) The greater molecular flexibility of the adsorbate, the greater intra particle diffusion effect. (ii) π-π stacking between isolated aromatic rings is stronger than that between parallelly connected aromatic rings. (iii) The strength of multiple active sites provided by quinoline (CH-π, NH-π and π-π interactions) are comparable but weaker than electrostatic interaction/intra particle diffusion.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Bin Yang,Ziqiang Yang,Xueqian Zhang,Ya Zhao,Youyu Wang,Jiahao Chen,Sen Wang,Qing Zhao,Zhiguo Hou
Sodium metal battery is considered as one of the most promising energy storage/conversion devices due to their high energy density, and abundant sodium reserves. However, its development is hampered by the limited metallic utilization and detrimental sodium dendrite growth ascribed to the unstable, and fragile solid electrolyte interphase (SEI). Here, the high stable and modulus SEI is constructed with a component of a thin and dense layer of high Na-ion conductive Na 2 SiO 3 . It is in situ formed by the reaction between sodium anode and fish-skin structure separator, which exhibits a 3D porous polyvinylidene fluoride-based framework embedded with thin and robust vermiculite sheets. The robust interphase cannot only suppress sodium dendrite growth but also enable high energy density with small interphase-consumed Na ions in anode-less batteries. Accordingly, the as-assembled NaNi 1/3 Fe 1/3 Mn 1/3 O 2 //Na cell shows 83% capacity retention after 5000 cycles at a rate of 5 °C. Moreover, the proof-of-concept pouch cells deliver an energy density of 205 Wh kg −1 (based on the total mass of the battery), and high safety (not catching fire after punctured) under anode-less condition (with a low negative/positive capacity ratio of ≈2.1).
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2024
·
IF 5.9
Ziqiang Yang,Yingdong Yang,Bin Yang,Mengning Luo,Yue Zhang,Jibin Miao,Shijun Kang,Zhengzhi Zheng,Jiasheng Qian,Ru Xia,Yuchao Ke,Yang Pan
In this work, a non-solvent induced phase separation (NIPS) technique was used to prepare polyvinylidene difluoride (PVDF) lithium battery (LIB) separators. Firstly, vermiculite nanosheets (VNs) coated by polydopamine (PDA), i.e., VNs@PDA, was ultrasonically dispersed in DMAc and PVDF was solution-blended with VNs@PDA with final porous composite films obtained after the extraction of DMAc. Effects of the presence of VNs@PDA on both structure and properties of PVDF films were intensively studied, and the SEM observations further suggested that the addition of VNs@PDA heavily affected the thermodynamic parameters between the polymer and solvent, causing a remarkable enhancement on the thermodynamic instability of the PVDF solution system. The polymer–solvent phase separation by the addition of less nonsolvent tended to induce the formation of long finger-like pores. An incorporation of 7.0 wt% VNs@PDA resulted in an increase in ionic conductivity of the composite membrane from 0.320 mS·cm −1 to 1.515 mS·cm −1 via AC impedance tests. The incorporation of VNs@PDA not only enhanced the hydrophilicity of the composite films (as judged by water contact angle dropping from 112.7° to 74.2°), but also significantly improved both battery performance and mechanical properties. The present study provides a facile way of fabricating LIB separators with sufficiently high safety and superior performance.
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ACS Omega
·
2024
·
IF 3.7
Xianqi Hu,Zhuang Ma
In this study, we introduce a novel series of gemini surfactants with amide groups (HDAB, HDAHD, and HDAPX) and use these surfactants to decorate sodium vermiculite (Na-Vt) for the adsorption of Ibuprofen (IBP) from wastewater. Exceptional IBP uptake on organo-vermiculites (organo-Vts) is obtained, with maximum adsorption capacities reaching 249.87, 342.21, and 460.15 mg/g for HDAB-Vt, HDAHD-Vt, and HDAPX-Vt (C0 = 500 mg/L, modifier dosage = 0.2 CEC), respectively. The adsorption of IBP is well fitted by pseudo-second-order, intraparticle diffusion, and Freundlich isotherm models, verifying chemical adsorption processes with multilayer arrangement of IBP in organo-Vts. Thermodynamically, the removal of IBP on HDAHD-Vt is exothermic, while the endothermic nature aptly describes the adsorption process of HDAB-Vt and HDAPX-Vt. Moreover, organo-Vts can be stably regenerated in three cycles. Outstanding adsorption performance of organo-Vts is attributed to synergistic effects of the partition process and functional interaction, which are influenced by the steric hindrance and chain configuration of the modifier. A combined evaluation of adsorption tests and fitting calculations is employed to reveal the adsorption mechanism: (i) the incorporation of amides into the alkyl chain significantly enhances the utilization of the interlayer space in organo-Vts. (ii) Smaller steric hindrance and higher rigidity of the modifier spacer contribute to improved adsorption performance. The findings in this study rekindle interest in Vt-based adsorbents, which demonstrate comparable potential to other emerging adsorbents that are yet to be fully explored.
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ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Fei Hu,Kaihui Liu,Yunyun Zhang,Shuhao Zhao,Tianyi Zhang,Cuiping Yao,Xing Lv,Jing Wang,Xiaolong Liu,Niancai Peng
Infectious diseases, especially respiratory infections, have been significant threats to human health. Therefore, it is essential to develop rapid, portable, and highly sensitive diagnostic methods for their control. Herein, a short-time preamplified, one-pot clustered regularly interspaced short palindromic repeats (CRISPR) nucleic acid detection method (SPOC) is developed by combining the rapid recombinase polymerase amplification (RPA) with CRISPR-Cas12a to reduce the mutual interference and achieve facile and rapid molecular diagnosis. SPOC can reduce the detection time and stably detect up to 1 copy/μL of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA without affecting the detection sensitivity. A highly sensitive one-pot assay integrated with reverse transcription RPA is achieved by wrapping paraffin with a specific melting point on the lyophilized CRISPR reagent surface. A self-heating pack is designed based on thermodynamic principles to melt the paraffin and release CRISPR reagents, enabling low-cost and time-saving detection. Notably, the designed system, coupled with RNA extraction-free technology, can achieve “sample-in-answer-out” detection of the SARS-CoV-2 Orf1ab gene within 22 min using smartphone imaging. The developed assay is validated on 12 clinical samples, and the results 100% correlate with real-time polymerase chain reaction. SPOC is time-saving, is easy to operate, and can eliminate centrifugal and complex hardware devices, satisfying the demand for point-of-care diagnostics in resource-constrained settings.
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危险品化学品经营许可证（带存储）