INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Wan Jiang,Yuyuan Bai,Qinzhen Li,Xiean Yao,Hui Zhang,Yongbo Song,Xiangming Meng,Haizhu Yu,Manzhou Zhu
An understanding of the response of nanomaterials to specific environmental parameters is an essential prerequisite for their practical use, especially in living systems. Herein, we disclose the preparation of a water-soluble nanocluster Au16(SR)12 (SR denotes deprotonated captopril) and its characterization by a combination of theoretical (e.g., density functional theory calculations) and experimental (UV–vis, electrospray ionization mass spectrometry, etc.) methods. Interestingly, Au16(SR)12 was found to convert to Au18(SR)14 under acidic conditions, while the reverse conversion from Au18(SR)14 to Au16(SR)12 occurred upon the addition of base. A mechanistic investigation determined this pH regulation to originate from the distinct steric and electrostatic properties of these two clusters. This study is the first to report the susceptibility of Au18(SR)14 and Au16(SR)12 to pH, and the distinct pH stability unambiguously reveals the importance of size-tracking of nanomaterials in living systems for future clinical applications.
研究领域:
纳米材料
·
生物化学
·
理论计算
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Yuyao Li,Leitao Cao,Xia Yin,Yang Si,Jianyong Yu,Bin Ding
Frequent outbreaks of emerging infectious diseases (EIDs) make personal protective filter media in high demand. Electrospun nanofibrous materials are proved to be very effective in resisting virus-containing fine particles owing to their small fiber diameters; however, hindered by the intrinsic close-packing character of fine fibers, electrospun filters suffer from a relatively high air resistance, thereby poor breathing comfort. Here, we report a biomimetic and one-step strategy to create ultrafine and curly wool-like nanofibers, named nano-wool, which exhibit fluffy assembly architecture and powerful electret effect. By achieving the online self-crimp and in-situ charging of nanofibers, the curly electret nano-wool shows a small diameter of ~0.6 μm (two orders of magnitude lower than natural wool: ~20 μm) and an ultrahigh porosity of 98.7% simultaneously, together with an ultrahigh surface potential of 13260 V (one order of magnitude higher than previous filters). The structural advantages and powerful electret effect enable nano-wool to show excellent filtration efficacy (>99.995% for PM 0.3 ) and low air resistance (55 Pa). Additionally, nano-wool can be easily scaled up, not only holding great industrial prospect in personal protective respirators, but also paving the way for developing next-generation wool in a cost-efficient and multifunctional form.
研究领域:
材料科学
·
生物医学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2016
·Vol. 28
·期 48
·10744-10749
·
IF 18.96
Xinghai Yu,Jian Pan,Jue Deng,Jun Zhou,Xuemei Sun,Huisheng Peng
Graphical A novel photoelectric conversion device in a yarn type is created by assembling an aligned carbon-nanotube fiber coated with poly(tetrafluoroethylene) and an aligned carbon-nanotube sheet/paraffin wax/polyimide bilayer composite strip together. A high output voltage is achieved with high reversibility and durability.
研究领域:
材料科学
·
光电工程
✓ 已验证
DOI
PubMed
高影响因子
Sustainability
·
2024
·Vol. 16
·期 7
·2808
·
IF 3.3
Wei Zhao,Kelimu Tulugan,Xin Zhang,Xiang Li,Peng Tian
Amidst rapid industrialization and urbanization, air pollution has emerged as a global environmental challenge. Traditional air filtration materials face challenges in effectively filtering PM0.3 and often result in discomfort due to high air resistance when used for personal protection, as well as excessive energy consumption in industrial air purification applications. This study initially utilized extremely high environmental humidity to induce fiber formation, resulting in the preparation of a fluffy fiber membrane with a three-dimensional curly morphology, which increased the porosity to 96.93%, significantly reducing air resistance during filtration. Subsequently, rutile TiO2with a high dielectric constant was introduced, exploiting the low pressure drop characteristic of the fluffy 3D curly fiber membrane combined with the electret effect of TiO2nanoparticles to notably improve the issue of excessive pressure drops while maintaining filtration efficiency. The microstructure, morphology, and element distribution of the fibers were analyzed using FESEM and EDS. FTIR and XRD were employed to examine the functional groups and crystal structure within the fibers. The electret effect and filtration performance of the fiber membrane were investigated using an electrostatic tester and a particulate filtration efficiency tester. The results demonstrated that inducing fiber formation under high-humidity conditions could produce fibers with a 3D curly structure. The fiber membrane was highly fluffy, significantly reducing the pressure drop. Introducing an appropriate amount of titanium dioxide markedly improved the electrostatic effect of the fiber membrane, enhancing the filtration performance of the 3D curly PVDF/TiO2composite fiber membrane. With a 0.5% addition of TiO2nanoparticles, the filtration efficiency of the fiber membrane reached approximately 99.197%, with a pressure drop of about 49.83 Pa. This study offers a new approach to developing efficient, low-resistance air filtration materials, showcasing the potential of material innovation in addressing air quality challenges within the sustainable development framework.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Wenlong Gao,Xinyu Wang,Shumin Liu,Maolin Fang,Xiangkun Ma
Alkaline zinc iron flow battery (AZIFB) is considered as an economical candidate for energy storage technologies. Ion conduction membranes as the key material of AZIFB directly affect the performance of efficiency and output power. However, the “Trade off” effect between ion selectivity and conductivity is a significant challenge in membrane development. Herein, we propose a method of simultaneously improving ion conductivity and ion selectivity by in-situ incorporating negative TiO 2 nanoparticles into the Nafion 212 membrane. The Nafion 212/TiO 2 composite membranes exhibit lower Zeta potential of −33.1 mV than the Nafion 212 membrane (−17.1 mV). This significant electronegativity of the composite membrane plays a key role in AZIFBs by inhibiting the crossover of the electronegative active species such as [Zn(OH) 4 ] 2 ⁻, [Fe(CN) 6 ] 4 ⁻, and [Fe(CN) 6 ] 3 ⁻. Additionally, since the charge carriers such as K + and Na + display electropositive properties, the electrostatic effect generated by the Nafion 212/TiO 2 composite membrane attracts these charge carriers, further influencing ion transport dynamics within the battery system. Therefore, the composite membrane synergistically enhances both ion selectivity and ion conductivity, resulting in impressive performance metrics for AZIFBs. Consequently, AZIFBs based on the composite membranes achieve a superior energy efficiency (EE) of 84.5 % and voltage efficiency (VE) of 84.9 % at a current density of 80 mA/cm 2 , which is much higher than that of the typical Nafion 212 membrane (EE: 68.2 %; VE: 68.9 %). This work offers significant insights for the enhancing the high-performance membranes for the practicality of AZIFBs.
研究领域:
材料科学
·
电化学能源
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zishuai Jiang,Yuan Yu,Xin Wang,Xiaohan Sun,Jiazuo Zhou,Zhaolin Yang,Miao Sun,Haiyue Yang,Chengyu Wang
Micro-/nano-plastics (MNPs) accumulate in water environment, which raise increasing threats to ecosystems and human health. There is a pressing need for sustainable biomass adsorbent materials to remove plastic fragments from environments. Herein, wood flour modified through etherification was synthesized to remove polystyrene (PS) micro- and nanoparticles of different sizes from wastewater, leveraging electrostatic effects. DLHCWF-300, an idea capturing material, demonstrated maximum adsorption efficiency of 99.3 %, 97.5 % and 98.6 % for polystyrene (PS) particles with diameters of 100 nm, 500 nm and 1 μm, respectively. The DLHCWF-300 also exhibited high tolerance on various water conditions (acidic, saline and organic dye environments) and adapted to complex properties of MNPs (different sizes, compositions and surface charges). Furthermore, the DLHCWF-300 treated water was compatible with crop cultivation, meeting the actual needs for wheat growth. The adsorbed PS MNPs can be used directly with wood flour in the preparation of wood-plastic composites. This study provides a new avenue for valorization of wood flour in water remediation through the efficient and straightforward separation of various types of plastic particles.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Dan Cao,Jun Xiang,Xi Chen,Ping Liu,Peng Zhao,Junchao Wang,Rui Li,Kaijun Li,Sheng Chen,Gongyan Liu
Amid the global pursuit of carbon neutrality and the pressing challenge of severe air pollution, degradable cellulose acetate (CA) materials hold great potential in the field of air filtration. However, their weak polarity and poor antibacterial properties limit their widespread application in this field. Herein, we developed CA-based nanofibrous membranes (CAPZ NFMs) with antimicrobial properties, which achieved efficient and stable filtration performance through a self-sustaining electrostatic effect driven by polarity. CAPZ NFMs were fabricated by electrospinning a solution that contained CA, highly polar zwitterionic copolymers (PSG), and biocompatible Zr4+. The zwitterionic groups of PSG increased the polarity of CAPZ NFMs to 19.62 mN·m–1, significantly surpassing that of pristine CA NFMs (2.94 mN·m–1). This enhancement granted CAPZ NFMs a surface potential of 2.07 kV, which enabled a PM0.3 filtration efficiency of 99.56% while maintaining a low pressure drop of 79 Pa. Notably, CAPZ NFMs maintained superior performance under high humidity conditions and 6 months of outdoor storage. Additionally, Zr4+ coordinated with the zwitterionic groups of PSG to form quaternary ammonium groups, endowing CAPZ NFMs with broad-spectrum antibacterial efficacy of over 99.99%. This work could provide new strategies for developing next-generation biodegradable, high-electrostatic filtration materials.
研究领域:
材料科学
·
环境科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Chunxia Pang,Huanhuan You,Lili Liang,Zhanguo Li,Xiaoyan Lin,Yaping Zhang,Hao Zhang,Xunhai Pan,Yang Hu,Yan Chen,Xuegang Luo,Haijun Wang
Radioactive aerosols in confined spaces of workplaces are the main source of internal radiation hazards for staff. Therefore, biomass-based electret fiber materials as alternatives of petroleum-based polymers will be of great potential in capturing radioactive aerosols due to its biodegradability , renewability and electrostatic effects. Herein, a fabrication strategy of bamboo pulp-based electret fiber aerogels by corona polarization is reported grounded on p-phenylenediamine (PPD)-modified bamboo pulp fibers (BCFs) and ethyl cellulose (EC). The morphology, chemical structure , and physical properties of BCFs before and after modification, as well as the electret properties and purification performance of fiber aerogel were analyzed. The results showed that PPD can be grafted uniformly on the surface of BCFs, making the fibers transform from irregular cylindrical shape with hierarchical surface to regular cylindrical shape with smooth surface, and can improve the surface potential of the fibers, one of the considerably great electret properties, from 0.00 kV to 1.33 kV when the graft amount of PPD was 0.500 g/g. The improvement in surface potential, leading by the grafted PPD structure which is a charge-trapping site confirmed by stoichiometric calculations, enhance the electrostatic trapping effect of the fibers on radioactive aerosol particles and shorten the purification time from 26 min to 15 min. Moreover, the electret fiber aerogel with modified BCFs (named as PPD-DABCFs) has a low air resistance of 56 Pa at the flow speed of 5.3 cm·s −1 , a light base weight of 62.7 g·m −2 and a long service life. Therefore, the bamboo pulp-based electret fiber aerogel has a promising application in the field of radioactive aerogel purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Hanze Zhang,Feng Tang,Shuanglin Wu,Chenmeizi Wang,Yaqing Yang,Fenglin Huang
2-Nonenal, a primary component of the characteristic “aging odor,” poses minimal toxicity but significantly affects quality of life and psychological well-being, necessitating its effective removal. However, the existing removal methods mainly rely on adsorption of activated carbon or odor masking after diffusion, which suffers from low efficiency and environmental concerns. This study presents an approach for eliminating 2-nonenal through a multilayered composite textile system that integrates the synergistic effects of amine-based adsorption and triboelectric-driven mechanisms, transforming waste static electricity into valuable resources. Manganese oxide particles were loaded onto the surface of PET by hydrothermal method (250.5 g/m2), and then modified by amination, and then combined with other different common fabrics to form double-layer composite fabric. Under 2 Hz friction frequency, interfacial contact electrification generates substantial surface charges up to 40 nC/cycle, with electrostatic effects enhancing catalytic performance through three synergistic mechanisms: (1) Continuous tribo-induced charge injection drives valence state oscillations in manganese oxides, concurrently generating dual reactive oxygen species (•O2– and •OH); (2) Locally intensified electric fields from accumulated interfacial charges significantly reduce activation energy for aldehyde group oxidation; (3) Amino-manganese oxide charge transfer complexes accelerate regeneration of high-valent manganese through electron-bridging effects, achieving 9% improvement in catalytic cycle efficiency. This electrocatalytic coupling mechanism achieves sustained 87.77% removal efficiency for 2-nonenal, providing an innovative self-powered and energy-efficient strategy for aldehyde pollutant remediation.
研究领域:
环境科学
·
材料工程
·
电化学
·
纺织技术
·
除臭技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Nan Lu,Mengtong Yi,Zuheng Wu,Yuchen Yang,Yukui Gou,Shaofan He,Weilong Cai,Yuekun Lai,Jianying Huang
Particulate emissions from high temperature pose a significant threat to air quality, necessitating advanced air filtration materials capable of withstanding extreme temperatures and complex environmental conditions. Here, we report a high-efficiency and high-temperature resistant polyimide/SiO 2 (PI/SiO 2 ) nanofiber membrane with excellent air permeability (146 mm/s) and electrostatic effects (−1500 V), fabricated via multi-needle electrospinning followed by thermal imidization. Interface regulation through SiO 2 incorporation enhances the membrane's permeability by expanding fiber spacing and increasing tortuosity, thereby prolonging particle-fiber collision time and improving passive filtration performance. The PI/SiO 2 fibers also generate self-sustained electrostatic charges through friction with air and inter-fiber contact, imparting active filtration capability. By controlling and increasing the SiO 2 content at a constant spinning amount, a balance between filtration efficiency and pressure drop was achieved through enhanced air permeability. Under continuous filtration at 260 °C for 240 min, the membrane exhibited exceptional PM0.3 filtration efficiency (99.1668 %) with a modest pressure drop (109 Pa). Furthermore, by integrating electrospun membranes with filter bags and conducting industrial dust simulations, it achieved an ultrahigh filtration efficiency of 99.9993 % with a pressure drop of only 133 Pa. The successful development of PI/SiO 2 nanofiber membranes provides a promising strategy for next-generation high-temperature-resistant air filters.
研究领域:
材料科学
·
环境工程
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Xianmei Piao,Zhongrui Liu,Yangyang Li,Dahong Yao,Liwen Sun,Baihui Wang,Yan Ma,Libo Wang,Yan Zhang
Bisphenol A (BPA) as a chemical raw material, is widely used in the manufacturing process of daily necessities. It was reported that BPA could induce oxidative stress , and catalase (CAT) can protect the body from oxidative stress. In this paper, the effect of BPA on CAT was carried out in vitro and in vivo. Firstly, we studied the effects of BPA on oxidative stress, cell viability and CAT activity in human hepatocytes, and the results of vitro experiments show that the survival rate of hepatocytes significant decreased along with the increase of BPA concentration. And when the BPA concentration was 100 μM, the hepatocyte survival decreased by 13.2%, ROS levels in the cells increased by 85%. However, the activity of intracellular CAT increased with the increasing concentration of BPA in 24 h. The results of vivo experiments showed that the activity of CAT in the high-dose group decreased by 29.1% compared with the control group. The long-term effects of BPA on rats reduced the CAT activity in liver, which reduced the resistance to oxidative stress. Meanwhile, the interaction mechanism between BPA and CAT at the molecule level was performed via multiple spectra methods and molecular docking, and the results illustrated that the structural change of CAT is mainly due to the strong combination of BPA with the residues of Trp185. In addition, the interaction mechanism between BPA and CAT were hydrophobic and electrostatic effect. This study provided experimental evidence for better understanding the toxicity of BPA.
研究领域:
毒理学
·
细胞生物学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2024
·Vol. 35
·期 1
·e6250
·
IF 3.1
Yangyang Wang,Hongding Yan,Mengxu Ma,Chenkai Zhou,Qian Hou,Zehong Xu,Min Xia,Huagang Ni,Yanrong Jia,Peng Ye
Electrostatic effect and Donnan effect could effectively improve the separation performance of nanofiltration membrane. Polyions were grafted from graphene oxide (GO) nanosheets to prepare the nanofiltration membrane, and the electrostatic effect and Donnan effect in the membrane pores could be greatly improved. The GO was modified by introducing double bonds. Then, polyanionic poly(acrylic acid) (PAA) and polycationic diallyldimethylammonium chloride (PDDA) were grafted from GO nanosheets, which were employed to fabricate the nanofiltration membranes, respectively. Therefore, nanofiltration membranes GO-PAA and GO-PDDA with cross-linked structure and pH responsiveness were prepared. The separation effect of the anionic dyes was over 99%, and the membrane had perfect adsorption effect on cationic dyes. The cross-linked structure formed between GO nanosheets inhibited the change of the interlayer spacing of the nanofiltration membrane. The conformation of the graft chains could be adjusted by the pH value of the solution, by adjusting the size of the nanochannel. The rejection rates of the nanofiltration membranes for the cationic dyes could reach more than 98%, and the membrane had perfect adsorption effect on anionic dyes. Similar to the grafted polyanion, the grafted polycation also formed a cross-linked structure between the graphene nanosheets, thereby inhibiting the change of the nanochannels with the pH value to a certain extent. Polyionic nanofiltration membranes have excellent selectivity and could be widely used in the treatment of dye wastewater and other fields.
研究领域:
材料科学
·
环境工程
·
纳米技术
✓ 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）