Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Qi Shen,DingYu Xing,Feiyun Sun,Wenyi Dong,Wentao Shang,Lingyan Zhao,Zijun Dong
Ceramic membrane bioreactor (CMBR) is an attractive alternative for wastewater treatment , although still subjects to fouling problem. This study facilely modified CM by oxidative polymerization of pyrrole with ionic liquid , to greatly enhance its conductivity and hydrophilic, and to sustainably mitigate fouling in an electric CMBR. Highly conductive ceramic membrane, BVIMBF 4 -CM, was facile obtained involving an ionic liquid 1-vinyl-3-butylimidazolium tetrafluoroborate (BVIMBF 4 ) on the base CM (Base-CM). After simple modification, the electrical resistance of CM was reduced significantly from 1017 Ω/sq to 349 Ω/sq, while its water contact angle decreased from 44.0° to 30.5°. With the assistant of minute electric field, BVIMBF 4 -CM exhibited a high rejection efficiency of over 85% Cu 2+ , 65% Ni 2+ and 93% bovine serum albumin (BSA). The interaction energy analysis verified BVIMBF 4 -CM itself prevent BSA from the membrane surface by the positive total interfacial energy. Meanwhile, the electrophoretic force provided by electric field enhanced the removal efficiency and antifouling capability of the BVIMBF 4 -CM. By using this modified CM to form an E-CMBR, a comparable removal efficiency as the CMBR could be stably obtained, which especially demonstrated significantly anti-fouling performance, as fouling rate decreased by 31.4–43.5%, and the total membrane resistance was only 60.8% of the Base-CM, under a minute electric field of 0.8 V/m. Enhanced hydrophilicity and conductivity of the BVIMBF 4 -CM take major responsible for this stable fouling alleviation in the E-CMBR. The new and facile method for CM modification proposed herein can serve as a reliable effort towards the application of antifouling E-CMBR system in wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS ES&T Water
·
2023
·
IF 5.3
Yuqing Sun,Jian Lu,Chenye Dai,Shilong Li,Dong Zou,Wenheng Jing
Highly efficient separation of monovalent/divalent cations from seawater and brines of salt lakes remains a major challenge primarily because such ions exhibit similar physical and chemical properties. Two-dimensional (2D) MXene (Ti3C2Tx) nanochannels are considered one of the most promising membranes for ion separation because of their remarkable electronic properties and regular interlayer spacing. Herein, a tubular ceramic-based MXene membrane was prepared through thermal cross-linking; the membrane was then employed for precisely separating Na+/Mg2+ with the assistance of an electric field. According to the cross-linking action (Ti–OH + Ti–OH = H2O + Ti–O–Ti) between MXene layers, interlayered nanochannels between MXene nanosheets can be fixed by decreasing the interlayer spacing, thereby exhibiting robust stability suitable for ion separation. Under an electric field of 1.5 V, the prepared membrane substantially improved the mixed-ion selectivity of Na+/Mg2+, achieving approximately complete separation through size sieving, ion dehydration, and Mg2+ enrichment on the membrane surface. Benefiting from the robust structure, the membrane retained long-term stability over eight cycles (up to 1000 min) of electric field-assisted ion separation for an acidic solution containing Na+ and Mg2+. Overall, this study provides a viable solution for constructing tube-based 2D membranes with highly robust nanochannels for efficient ion sieving.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Hao Gong,Yang Li,Yaru Liu,Yuting Shan,Yijie Wang,Cuiping Ma,Chao Shi
Pathogenic bacteria represent a significant threat to public health and the global economy due to their high infectiousness and lethality. Consequently, the rapid and accurate identification of these bacteria remains a major challenge. Electrochemical amplification-free detection methods have shown several advantages, including rapidity, simplicity and high sensitivity. However, these methods also possess certain drawbacks, such as the inefficient solid-phase hybridization of long-chain nucleic acids on the electrode surface, it is challenging to directly detect long-chain nucleic acids. In response, we have established a novel sensor platform for efficient and rapid detection of long chain nucleic acids based on the principle of HRP signal amplification. This platform incorporates macromolecular crowding agents and electric field assistance to enhance pathogenic bacteria detection efficiency in clinical samples without amplification. The detection process begins by introducing the target into a strand displacement reaction system containing a crowding agent. The crowding effect of the crowding agent is such that the long chain target rapidly replaces the biotinylated probe. Subsequently, an electric field is applied to the surface of the screen-printed electrodes for rapid hybridization, which has been modified with a capture probe. This assay is straightforward and expeditious, reducing hybridization time from 150 min to 90 s. The sensor platform showed a detection linear range of 10 2 –10 7 CFU mL −1 with the limit of detection of 10 CFU mL −1 within 25min. This platform showcases the significant potential for on-site detection of pathogenic bacteria in clinical settings and is expected to be integrated into existing diagnostic equipment.
研究领域:
生物传感
·
医学诊断
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Wood Material Science & Engineering
·
2024
·
IF 2.2
Yanchun Fu,Jingyu Chen
The photochromic properties are highly desirable for advanced wood applications, but they have not been extensively studied. To incorporate photochromic capabilities into wood materials, composite coatings were developed on the wood surface using an electric field-assisted layer-by-layer (LBL) self-assembly technique. The composite coatings consist of cationic chitosan and anionic tungsten trioxide (WO3) nanoparticles. By applying a direct current voltage during the deposition process, a well-organized distribution of WO3 nanoparticles was achieved, resulting in a uniform coverage of the wood substrate. This assembly process facilitated the creation of structured photochromic coatings with minimal nanoparticle fillers, a straightforward and rapid procedure, and potential for large-scale production. Lab colorimetric results demonstrated that the wooden substrate changed color from its natural state to blue when exposed to UV light. UV-vis spectroscopy further confirmed the efficient absorption of WO3 and photochromic properties of the modified wood.
研究领域:
材料科学
·
林业工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Fiber Materials
·
2025
·
IF 21.3
Cheng Siyi,Zhang Han,Chen Xiaoming,Wang Yijie,Cheng Fangyi,Sun Pengyuan,Li Youyou,Yang Zhengjie,Zhang Jie,Sun Jianxu,Shao Jinyou,Lu Bingheng
Piezoelectric filler-based composite fiber sensors have emerged as promising candidates for wearable textiles due to their self-powered capability and excellent sensing performance. However, current spinning fabrication methods face significant challenges in achieving uniform distribution and optimal orientation of piezoelectric fillers within polymer matrices, which limits their sensing performance. To address these issues, an innovative electric-assisted coaxial wet spinning method is developed to fabricate piezoelectric composite fiber (denoted as P-B fiber), which was composed of boron nitride nanosheets (BNNSs) as piezoelectric fillers and polyvinylidene fluoride (PVDF) as a piezoelectric polymer matrix. The radial electric field applied during spinning promotes the radial orientation of BNNSs, leading to enhanced stress transfer efficiency and, as a result, improved piezoelectricity. Moreover, the radial electric field enables the simultaneous in-situ polarization of BNNSs and PVDF during spinning process, further improving the piezoelectric performance. As a result, the P-B fiber exhibits an exceptional piezoelectric sensitivity of (186.4 ± 1.1) mV/N, approximately sixfold higher than that of fibers produced without electric field assistance. Accordingly, the P-B fiber demonstrates remarkable capability in detecting tiny mechanical loads, such as pulse waves and respiration, making it particularly suitable for wearable physiological monitoring textiles, providing a promising strategy for developing high-performance piezoelectric fiber sensors. Graphical abstract
研究领域:
材料科学
·
传感器技术
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Xuteng Zhao,Dejun Xu,Yinan Wang,Zuwei Zheng,Ke Li,Yiran Zhang,Reggie Zhan,He Lin
A novel catalytic system for benzene oxidation at low temperature is constructed by combining electric field with Pt-Ce-Zr nano-catalyst. The 1 wt% Pt/Ce 0.75 Zr 0.25 O 2 catalyst assisted by electric field shows the best catalytic performance with 90% benzene conversion at 96.5 °C and excellent water resistance. The effect of electric field on catalysts and catalytic process is comprehensively investigated. The results of XRD, TEM, XPS and H 2 -TPR reveal that the electric field show negligible influence on the crystal structure and surface morphology of the catalyst, but it can lead to more oxygen vacancies. Therefore, more adsorbed oxygen with higher activity will be produced on the catalyst surface. The redox performance is improved due to the fact that valence distribution of Pt is changed in forms of more active sites composed of high valence oxides (PtO) generated in electric field. In situ DRIFTS is used to investigate the oxidation process of benzene and the results prove that electric field could accelerate the production and consumption of intermediate products, and produce new intermediate products such as carboxylic acid species, indicating that the introduction of electric field may open up a new rapid reaction path and promote the activation of benzene at low temperature.
研究领域:
催化化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
Materials
·
2021
·Vol. 14
·期 14
·3816
·
IF 3.623
Xiaojie Li,Xin Li,Pei Zuo,Xiaozhe Chen,Misheng Liang,Le Ma
TiO2is popular in photocatalytic degradation dye pollutants due to its abundance and its stability under photochemical conditions. Au loaded TiO2can achieve efficient absorption of visible light and deal with the problem of low conversion efficiency for solar energy of TiO2. This work presents a new strategy to prepare Au nanoparticles-loaded TiO2composites through electric−field−assisted temporally−shaped femtosecond laser liquid-phase ablation of Au3+and amorphous TiO2. By adjusting the laser pulse delay and electric field parameters, gold nanoparticles with different structures can be obtained, such as nanospheres, nanoclusters, and nanostars (AuNSs). AuNSs can promote the local crystallization of amorphous TiO2in the preparation process and higher free electron density can also be excited to work together with the mixed crystalline phase, hindering the recombination between carriers and holes to achieve efficient photocatalytic degradation. The methylene blue can be effectively degraded by 86% within 30 min, and much higher than the 10% of Au nanoparticles loaded amorphous TiO2. Moreover, the present study reveals the crystallization process and control methods for preparing nanoparticles by laser liquid ablation, providing a green and effective new method for the preparation of high-efficiency photocatalytic materials.Keywords:electric-field-assisted;femtosecond laser;Au@TiO2composites;photocatalytic degradation
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Quan Li,Yahui Liu,Yanghe Liu,Yanhong Ji,Zhenyu Cui,Feng Yan,Jianxin Li,Mohammad Younas,Benqiao He
An electric field assisted nanofiltration (ENF) process was used for Mg 2+ /Li + efficient separation from a MgCl 2 /LiCl solution and a simulated salt-lake brine. The influence of membrane pore structure , electric property, and other process parameters on the Mg 2+ /Li + separation performance in the ENF was systematically investigated. The structural coefficient ( λ ) of NF membrane was introduced to quantify the membrane pore structure including pore size, pore length and porosity. Results suggested that membrane pore structure, instead of membrane pore size, had a critical role on the ENF separation performance. Direct current electric field (DC-EF) markedly promoted Mg 2+ /Li + separation. However, the effect of alternating current EF (AC-EF) with different frequencies was nominal. The synergistic effect between λ and DC-EF on Mg 2+ /Li + separation was also demonstrated. A low-concentration feed with suitable Mg 2+ /Li + mass ratio and pH value, and low transmembrane pressure were beneficial to Mg 2+ /Li + separation. For 2000 ppm MgCl 2 /LiCl feed solution with a Mg 2+ /Li + mass ratio of 20, a nearly complete rejection to Mg 2+ and a high Li + flux simultaneously achieved; correspondingly, a separation factor of Li + over Mg 2+ ( S Li,Mg ) reached above 7000, which is 2-3 orders of magnitude higher than that of pure NF membrane. For a simulated 10,000 ppm brine solution, a S Li,Mg value was up to above 50. The study suggested that ENF process witnessed simple and efficient separation performance for Li + extraction from salt lakes.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jia Xie,Yingpeng Yang,Hao Zhang,Saisai Chen,Zhengjun Lv,Yujun Zhou,Junwen Qi,Xiuyun Sun,Jiansheng Li
Advanced oxidation processes (AOPs) were appealing wastewater treatment options yet practices were hampered by reactor design and diminished performance in complex water matrices. Herein, one-step-pyrolysis strategy was proposed for large-scale synthesis of ZIF-67 derived conductive Co/N carbon hollow fiber ultrafiltration membrane to achieve exceptional availability of catalytic sites and interference prevention from macro molecular substances by size exclusion. Benefitting from the microenvironment modulation and electric field assistance (−1 V, membrane as the cathode), the bisphenol A (as a model micropollutant) can be efficiently removed with enhanced mass transfer of flow-through process (modified apparent reaction rate constant of 1260 μM g cat -1 s −1 ) and the active cobalt species were cycled via electroreduction thus showing exceptional sustainability with nearly zero Co leaching even after 24 h operation. The synergy effects between separation and catalysis alleviated the deteriorated AOPs efficiency and membrane fouling caused by macromolecular organic matter. The integrated membrane system provides new insight into rational design of catalytic membrane and system engineering for advanced water purification.
研究领域:
环境科学
·
材料科学
·
污水处理
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Yannan Ma,Yong Chen,Chengwen Xin,Yanqiong Cheng,Qianqi Li,Hui Xu
Redox electrolytes bridge the energy density gap between carbon-based supercapacitors and batteries. However, across-diffusion of soluble redox couples results in subpar rate performance, therefore, how to deal with this impasse becomes the focus of the field’s attention. In this study, we put forth the idea that the problem can be solved by using activated carbon nanopores as reservoirs to retain redox species and prevent their diffusion. The electric field is used to help confine sodium anthraquinone-2-sulfonate (AQS, size is around 1.634 × 0.634 × 0.864 nm3) to the nanopores of the tea-leaf biomass carbon electrode (TAC, 59.65% of micropores). We show that AQS molecules occupy small micropores (less than 1 nm), resolving the problem of cross-diffusion that arises naturally in redox-enhanced electrochemical capacitors. Thus, in the 1 M H2SO4 electrolyte, a high specific capacitance of 733.3 F g–1 is produced in a three-electrode system at a current density of 1 A g–1, and only 7% of the specific capacitance decays at a current density of 10 A g–1. Besides, the TAC/AQS-5 electrode-based symmetric device delivers a maximum energy density of 41.48 Wh kg–1 and excellent capacitance retention of 86.2% after 5000 charge and discharge cycles at 2 A g–1. The maximum energy density obtained by our symmetrical supercapacitor is higher than that of currently reported aqueous electrolyte supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Gaoyang Zhou,Zhenjie Ma,Yue Jia,Huayan Chen,Xiaoai Zhang,Shuyun Zheng
To facilitate mass transfer of an extraction gel membrane (EGM) process, electric field was applied and its effects on flux and operation stability were investigated in this study. The optimum process conditions were investigated and obtained by adjusting the operating parameters: a current density of 1.5 mA·cm −2 , the liquid phase velocity of 2 × 10 −3 m/s, and the stripping phase concentration of 0.5 mol/L. The operation test was carried out for 72 h under the function of applied electric field. A higher flux of 3458.16 mg·m −2 ·h −1 was achieved in this case, compared with the initial mass transfer flux of 2065.46 mg·m −2 ·h −1 without electric field assistance. Therefore, with the help of constant current operation mode of electric field, the mass transfer flux of stability-enhanced EGM is obviously increased. Although the total flux attenuation rate increased from 16.78 % to 30.82 % after 72 h operation, the final flux was still higher and reliable. These results show that applied electric field is an effective assistant method for a stability-enhanced EGM to obtain higher mass transfer efficiency.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Chengzhong Xiong,Runzhang Tao,Jian Lu,Shilong Li,Dong Zou,Yuqing Sun,Wenheng Jing
Efficient recovery of Li + from lithium-ion batteries (LiBs), which also include Co 2+ , Ni 2+ , or Mn 2+ in the cathode material, remains a formidable challenge because the sizes and physicochemical properties of these ions. Composite lamellar membranes are emerging as highly ion-selective nanochannels with controllable interlayers. Herein, Li + /Co 2+ was precisely separated through two-dimensional MXene/δ-MnO 2 composite nanochannels under an electric field. The nanochannels were constructed on tubular ceramic membranes via hydroxyl crosslinking. The membrane layer spacing can be extended to 5.7 Å by electrostatic repulsion between MXene and δ-MnO 2 nanosheets, which is suitable for Li + /Co 2+ separation. Under an electric field of 2 mA cm −2 , Li + /Co 2+ was nearly completely separated, with a high Li + flux of 0.0094 mol m -2 h −1 , and the energy consumption was ∼0.315 kW h (mol Li + ) -1 . Similarly, near-complete separation of Li + /Ni 2+ and Li + /Mn 2+ can be achieved at a current density of 2 mA cm −2 . The transport of Li + in solution was accelerated under a positive electric field and by partial dehydration in the nanopores. Meanwhile, the zeta potential was distinctly more negative in the composite membranes than in individual MXene or δ-MnO 2 . Consequently, Co 2+ was rapidly adsorbed on the negatively charged membrane surface through electrostatic interactions and complexation, forming a positively charged Co 2+ layer that electrostatically repelled further Co 2+ adsorption, ultimately achieving near-complete separation of Co 2+ . Owing to their stable and robust structure, the MXene/δ-MnO 2 membranes maintained high separation efficiency in acidic solutions containing Li + and Co 2+ and remained stable over eight cycles (up to 14 h) of ion separation under an electric field. This approach can potentially realize 2D membrane composites for efficient ion separation in practical applications.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 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）