Gels
·
2025
·Vol. 11
·期 8
·568
·
IF 5.3
Yi Wang,Enkai Lin,Ze Wang,Tong Feng,An Xie
Electrochromic (EC) devices are gaining increasing attention for next-generation smart windows and low-power displays due to their reversible color modulation, low operating voltage, and flexible form factors. Recently, electrochromic energy storage devices (EESDs) have emerged as a promising class of multifunctional systems, enabling simultaneous energy storage and real-time visual monitoring. In this study, we report a flexible dual-functional EESD constructed using polyaniline (PANI) films doped with anthraquinone-1-sulfonic acid sodium salt (AQS), coupled with a redox-active PVA-based gel electrolyte also incorporating AQS. The incorporation of AQS into both the polymer matrix and the gel electrolyte introduces synergistic redox activity, facilitating bidirectional Faradaic reactions at the film–electrolyte interface and within the bulk gel phase. The resulting vertically aligned PANI-AQS nanoneedle films provide high surface area and efficient ion pathways, while the AQS-doped gel electrolyte contributes to enhanced ionic conductivity and electrochemical stability. The device exhibits rapid and reversible color switching from light green to deep black (within 2 s), along with a high areal capacitance of 194.2 mF·cm−2at 1 mA·cm−2and 72.1% capacitance retention over 5000 cycles—representing a 31.5% improvement over undoped systems. These results highlight the critical role of redox-functionalized gel electrolytes in enhancing both the energy storage and optical performance of EESDs, offering a scalable strategy for multifunctional, gel-based electrochemical systems in wearable and smart electronics.
研究领域:
材料科学
·
电化学
·
能量存储
·
智能材料
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柔性电子学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Fei Chai,Samuel Kolog Badazabra,Feiping Zhao,Xu Yan,Qingwei Wang,Xiaobo Min,Liyuan Chai
Arsenic is a widely acknowledged environmental pollutant commonly found in both natural and industrial water systems, posing critical risks to both ecosystems and human health. This study introduces an iron-modified MnMg layered double hydroxide (FeMnMg-LDH) engineered to enhance arsenic removal efficiency for both As(III) and As(V) under environmentally relevant conditions. The materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR). The incorporation of Fe into MnMg-LDH led to increased surface area, optimized surface chemistry, and mitigated particle aggregation, thereby exposing additional active sites. The FeMnMg-LDH demonstrated remarkable adsorption capacities of 106.67 mg g −1 for As(III) and 107.63 mg g −1 for As(V), representing a sixfold and twofold enhancement, respectively, over the pristine MnMg-LDH. Adsorption kinetics and isotherms aligned closely with pseudo-second-order and Langmuir models, indicating monolayer chemisorption. Competitive anion experiments revealed minimal interference except for PO 4 3- , underscoring the material’s selectivity. The FeMnMg-LDH retained > 80 % of its initial capacity after three regeneration cycles, demonstrating robust reusability. The mechanisms investigation reveals a synergistic oxidation-adsorption process, where Fe/Mn redox couples facilitated As(III) oxidation to more adsorbable As(V), coupled with immobilization via coprecipitation, surface complexation, electrostatic interactions, and ion exchange. These findings reveal that FeMnMg-LDH is a promising sorbent for arsenic-contained wastewater treatment, offering practical advantages in stability, efficiency, and scalability.
研究领域:
环境科学
·
材料科学
·
水处理技术
·
化学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hongwu Liao,Chong Wang,Jiaxian Zheng,Zhuo Chen,Yulin Zhou,Chengning Ye,Xiangfeng Lin,Meng An,Yusuke Yamauchi,Yusuke Asakura,Zhanhui Yuan
Photocatalytic depolymerization of lignin offers a sustainable approach to producing high-value-added aromatic compounds. Recently, carbon nitride has demonstrated notable selectivity for the C C bonds in lignin model compounds. However, limitations of pure carbon nitride include the low mobility of photogenerated electrons and the difficulty in precisely controlling the cleavage pathways and products of C C bonds. In this study, we constructed an S-Scheme heterojunction by in situ loading of Ce ions onto C 3 N 4 to form a CeO 2 /C 3 N 4 composite. This heterojunction achieves efficient lignin depolymerization under blue LED irradiation in an oxygen-rich environment. Comparative analysis indicated that the yield of primary products, benzaldehyde and phenyl formate, increased by 7.8-fold and 7.75-fold, respectively, compared with pure CeO 2 , and by 1.4 and 1.8 times relative to unmodified C 3 N 4 . After optimizing the reaction conditions, dealkalized lignin is applied to the system and successfully depolymerized. Comprehensive characterization and theoretical simulations verify the heterojunction's ability to enhance carrier separation and redox activity, with CeO 2 serving as an active dehydrogenation site that significantly boosts the depolymerization efficiency of lignin model compounds. This photocatalytic strategy presents a valuable step forward in lignin valorization and supports the sustainable utilization of biomass resources.
研究领域:
光催化
·
木质素高值化
·
生物质转化
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材料科学
·
环境化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Lanrui Yin,Fei Zhou,Keling Yan,Yashi Pu,Guanghui Li,Di Tian
The weak interaction between transition metal selenides and carbon materials caused difficulties for their combination. In this study, a novel strategy based on lignin and Co nanoparticles was used for modifying electrospun carbon nanofibers to boost the growth of Ni 3 Se 4 . Interestingly, various types of lignin could induce the aggregation and distribution of Co nanoparticles, leading to different crystal structures, morphologies, and amounts of Ni-based selenides. Among them, sodium lignosulphonate brought about Co nanoparticles inside nanofibers and the formation of S–Co bonds, leading to the massive growth of Ni 3 Se 4 nanosheets with high redox activities and abundant active sites. As a result, the sample modified by Co and sodium lignosulphonate (CFLS@NiSe) with a diffusion-controlled hybrid capacity displayed the highest value of 384.00 C g −1 (853.33 F g −1 ) at 0.5 A g −1 and acceptable rate performance (capacity retention of 39 %, from 0.5 to 10 A g −1 ), which exceeded many reported transition metal selenide-carbon composites. Furthermore, a hybrid solid-state supercapacitor (CFLS@NiSe//bamboo derived active carbon) with a high energy density of 61.33 Wh kg −1 was assembled, which could supply energy for light emitting diode and deliver a capacity retention of 94.15 % as well as Coulombic efficiency of 92.29 % after 10,000 cycles. Compared with traditional modification strategies, this work proposed a novel, facile, feasible, low cost and environmentally friendly method to modify carbon nanofibers to regulate the growth of selenides, which will offer ideas for the design of composite materials.
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Wei Shi,Xueye Wang,Fei Gao,Zhiwei Wang
The effective removal of trace levels of the highly toxic arsenite (As(Ⅲ)) from groundwater is crucial to address the threat to drinking water supply. Herein, we developed an electrochemical separation system utilizing redox-active ferrocene-based metal-organic frameworks (termed Fe-DFc) for selective removal of As(III). This system leveraged 1,1′-ferrocenedicarboxylic acid as a ligand coordinated with iron, enabling the highly selective capture and conversion of As(III) from groundwater. The Fe-DFc electrode-based electrochemical system not only effectively removed As(III) even in the presence of a 1250-fold excess of competing electrolytes, but also converted about 96 % of the adsorbed As(III) into the less toxic As(V), surpassing the results of those documented in the current literature. X-ray absorption fine structure analysis and density functional theory calculations demonstrated that the high selectivity of Fe-O 6 moiety and the exceptional redox activity of Fc synergistically contributed to the efficient removal of As(III). Moreover, the electrochemical separation system enabled the remediation of arsenic-contaminated groundwater at a low energy cost of 0.033 kWh m −3 during long-term operation, highlighting the application potential of the electrochemical technology for arsenic removal from contaminated water.
研究领域:
环境科学
·
化学
·
材料科学
·
电化学
·
水处理
✓ 已验证
DOI
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Peipei Zhang,Haoran Xu,Jun Yang,Minjie Shi,Yuqing Lin
Hybrid capacitive deionization (HCDI) has emerged as a promising desalination technology, but its development is hindered by the lack of high-performance organic electrodes with abundant redox-active sites and robust structural stability. To address this challenge, we design a novel two-dimensional π-conjugated polymer (SFPBI) through molecular engineering, integrating multiple redox-active moieties with aromatic reinforcement strategies. Comprehensive electrochemical analysis, supported by in-situ spectroscopic characterization and theoretical calculations, reveals that SFPBI polymer, enriched with C=N and C=O functional groups, enables efficient pseudocapacitive ion adsorption. Its rigid backbone and extensive electron delocalization, characterized by a narrow HOMO-LUMO gap (2.99 eV), ensure exceptional structural stability and electrochemical activity. A HCDI device incorporating the SFPBI electrode achieves a remarkable salt removal capacity of 79.43 mg g −1 , a rapid average removal rate of 2.65 mg g −1 min −1 , and excellent regeneration stability (∼92.01 % retention over 500 cycles), outperforming reported organic electrodes. As a proof of concept, we develop an integrated solar-powered desalination system using interconnected HCDI devices, which not only produces desalinated water meeting human consumption standards but also efficiently removes organic dyes and recovers energy. This study demonstrates a breakthrough in organic electrode design for HCDI, offering a scalable and energy-efficient solution for water desalination and purification.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yeku Wang,Shengxin Li,Deqiu Zou,Nan Sheng,Chunyu Zhu
Developing high-performance materials for integrated thermal energy storage and oxygen production is critical for advancing sustainable energy systems. Aluminum as heat storage phase change materials has a high latent heat storage density, but suffering from the leakage problems. The SrFeO 3− δ (SFO) oxygen carrier exhibits exceptional redox activity for air separation with a high reduction enthalpy of 96 kJ/mol. In this study, we report a multifunctional composite macrocapsules composed of SFO shell and metallic aluminum core, engineered to synergistically combine thermochemical, latent, and sensible heat storage with air separation capabilities. The composite macrocapsule has a high heat storage capacity of 435.9 J/g at a temperature duration of 873 K to 1073 K and an oxygen storage capacity of 1.69 wt%. After conducting 50th thermal cycles in air for the composite macrocapsules, the samples remain unbroken and the oxygen absorption/release and heat storage capacities remain stable. The synergy between the thermochemical properties of SFO and the phase change heat storage of aluminum enables dual functionality, i.e., efficient high-temperature heat storage and on-demand air separation for chemical looping applications. This work provides a scalable paradigm for multifunctional energy materials, bridging the gap between thermal management and carbon neutral technologies.
研究领域:
材料科学
·
储能技术
·
化学工程
·
热管理
·
可持续能源
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Aicheng Song,Zhitao Han,Xiao Yang,Mengjing Zhang,Xi Wu,Zelu Zhou,Dong Liu,Dong Ma
The high energy consumption associated with solution regeneration in amine-based CO 2 capture processes remains a major challenge for large-scale carbon capture and storage (CCS) applications. However, the addition of solid acid catalyst accelerates the slow CO 2 desorption process while reducing the energy consumption for regeneration of the amine-rich solution. Herein, we innovatively developed Mn 3 O 4 -modified SAPO-34 catalysts via impregnation, demonstrating exceptional efficacy in reducing energy consumption for CO 2 -rich monoethanolamine (MEA) solution regeneration. Mn 15 -SAPO catalyst exhibited excellent performance in catalytic desorption tests using a 5 M CO 2 -rich MEA solution at 90 °C, achieving a 31.0 % increase in CO 2 desorption rate, a 133.3 % increase in CO 2 desorption amount, and a 57.1 % reduction in solution regeneration heat duty compared to the non-catalytic process. Comprehensive characterization revealed that the optimized Mn 15 -SAPO catalyst featured abundant strong acidic sites, optimal mesoporous structure, and the redox activity of Mn 3+ /Mn 4+ species. FTIR and 13 C NMR analysis confirmed the catalytic accelerating effect of catalysts on the conversion of intermediates. A possible reaction mechanism for the catalytic desorption of CO 2 over Mn x -SAPO catalysts was discussed. Additionally, the cycling stability of Mn 15 -SAPO catalyst was also evaluated. This work demonstrated the potential of Mn 15 -SAPO catalyst in enhancing the efficiency of the amine CO 2 capture process and reducing energy consumption, which was conducive to the application of industrial CO 2 capture.
研究领域:
能源与燃料
·
环境科学
·
催化
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2021
·
IF 7.711
Xiaofang Wang,Tianci Xu,Yue Zhang,Nan Gao,Taotao Feng,Shujun Wang,Meining Zhang
Electrochemical tracking of redox-inactive neurochemicals remain a challenge due to chemical inertness, almost no Faraday electron transfer for these species, and the complex brain atmosphere. In this work, we demonstrate a low-cost, simple-making liquid/liquid interface microsensor (LLIM) to monitor redox-inactive neurochemicals in the rat brain. Taking choline (Ch) as an example, based on the difference in solvation energies of Ch in cerebrospinal fluid (aqueous phase) and 1,2-dichloroethane (1,2-DCE; organic phase), Ch is recognized in the specific ion-transfer potential and distinctive ion-transfer current signals. The LLIM has an excellent response to Ch with good linearity and selectivity, and the detection limit is 0.37 μM. The LLIM can monitor the dynamics of Ch in the cortex of the rat brain by both local microinfusion and intraperitoneal injection of Ch. This work first demonstrates that the LLIM can be successfully applied in the brain and obtain electrochemical signals in such a sophisticated system, allowing one new perspective of sensing at the liquid/liquid interface for nonelectrically active substances in vivo to understand the physiological function of the brain.
研究领域:
神经科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Technological Sciences
·
2019
·Vol. 62
·期 10
·1679-1687
·
IF 2.18
Tan Bin,Zhou ShaoFeng,Wang Yi,Zhang BeiPing,Zhou LiHua,Yuan Yong
Extracellular polymeric substances (EPS) extracted from electroactive bacteria show promising redox activity, but the electron transfer (ET) mechanism of the EPS has been rarely elucidated because of their structural complexity and lack of efficient methodologies. In this study, the charge transfer theory of surface-enhanced Raman spectroscopy (SERS) was applied to evaluate the redox properties of EPS adsorbed on Ni and Ag nanoparticles (NPs). These metal NPs were used to simultaneously magnify Raman signals and reduce/oxidize the redox moieties in EPS. As a result, the ET between EPS and metal NPs was evaluated through the changes in Raman signals. In this regard, we compared the redox activity of EPS extracted from two typical electroactive bacteria ( Shewanella oneidensis and Geobacter sulfurreducens ) and another two nonelectroactive strains ( Escherichia coli and Bacillus subtilis ). Electrochemical measurements show that the electroactive strains have higher redox capabilities than nonelectroactive strains. The SERS analysis shows that the porphyrin present in cytochrome c is the dominating redox moiety in the EPS of electroactive bacteria. The results of this study show that SERS with active metal substrates is a sensitive tool to probe the redox response of EPS, offering an opportunity to better understand the redox nature of biomolecules.
研究领域:
微生物学
·
电化学
·
光谱学
·
生物技术
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Jianren Wang,Tianshuo Yang,Adekunle Adedapo Obisanya,Yan Ma,Zhibin Ren,Xinyi Tan,Wenwei Lei,Ailing Song,Faming Gao
Achieving high areal energy density requires the development of advanced electrodes capable of maintaining excellent performance under high mass-loading conditions. Herein, a novel force-field regulation strategy has been proposed to fabricate graphene oxide/exfoliated graphene heterogeneous micro-aerogels (GM) electrodes with precisely engineered channel structures and interconnected conductive frameworks. This innovative design effectively mitigates the limitations of conventional graphene aerogels (GA) and graphene films (EGF), such as prolonged ion transport paths and severe internal potential gradients, particularly under high mass-loading. As a result, GM electrode, with a high mass loading of 20 mg cm −2 , demonstrates an outstanding capacitance of 2.53 F cm −2 at an operational time of 200 s, and maintains a superior 58.7% capacitance retention at a shorter time of 5 s, significantly outperforming its GA and EGF counterparts. Moreover, GM architecture can serve as a universal platform to host redox-active faradic materials (e.g., PANI, MnO 2 , and Co(OH) 2 ), achieving exceptional areal capacitances up to 16.9 F cm −2 , demonstrating its versatility and scalability for energy storage applications. The underlying mechanisms driving the superior performance of GM electrodes are comprehensively elucidated through multiscale characterizations, electrochemical analyses, and finite element simulations, offering a robust framework for the design of next-generation high-mass-loading energy storage systems.
研究领域:
材料科学
·
纳米技术
·
储能技术
·
电化学
·
先进制造
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 46
·2509099
·
IF 19
Yichen He,Yonglin Huo,Maowen Xu,Yuruo Qi
Layered cathode materials for sodium ion batteries (SIBs) have garnered significant attention due to their high theoretical capacity and tunable crystal structure. However, they still confront severe structural attenuation at high voltages, especially those undergoing anionic redox reactions. To mitigate these limitations and elucidate the underlying mechanism, herein, a biphasic cathode material, Na 0.67 Fe 0.3 Mn 0.5 Li 0.1 Mg 0.1 O 2 , comprising 76.6% P2 and 23.4% O3 phases is proposed. The “Na─O─Mg” structure with robust Mg─O bonds enhances oxygen redox activity but also suppresses lattice oxygen evolution at elevated voltages, enabling a high initial discharge capacity of 187.8 mA h g⁻¹ at 0.1C. Moreover, the biphasic structure suppresses O/P structural rearrangement and mitigates harmful phase changes via forming OP2 phase at high-voltage, resulting in excellent cycling stability with a capacity retention of 96.6% after 100 cycles at 1C within an extended voltage window of 1.8–4.3 V. These findings deepen the understanding in the interlocking effect of biphasic materials and offer valuable insights for designing high-performance cathode materials.
研究领域:
材料科学
·
电化学
·
能量存储
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）