MOLECULES
·
2023
·Vol. 28
·期 6
·2647
·
IF 4.6
Peng Wang,Xu Han,Xianhong Zheng,Zongqian Wang,Changlong Li,Zhiqi Zhao
In order to improve the photocatalytic performance of g-C3N4, the g-C3N4/Ti3C2/Ag3PO4S-type heterojunction catalyst was prepared by electrostatic assembly method, and then the g-C3N4/Ti3C2/Ag3PO4/PAN composite nanofiber membrane was prepared by electrospinning technology. The morphology and chemical properties of the nanofiber membrane were characterized by SEM, FTIR, and XRD, and the photocatalytic degradation of tetracycline hydrochloride (TC) in water by the nanofiber membrane was investigated. The results showed that g-C3N4/Ti3C2/Ag3PO4could be successfully loaded on PAN and uniformly distributed on the surface of composite nanofiber membrane by electrospinning technology. Increasing the amount of loading and catalyst, lowering the pH value and TC concentration of the system were conducive to the oxidation and degradation of TC. The nano-fiber catalytic membrane had been recycled five times and found to have excellent photocatalytic stability and reusability. The study of catalytic mechanism showed that h+, •OH and •O2−were produced and participated in the oxidation degradation reaction of TC, and •O2−plays a major role in catalysis. Therefore, this work provides a new insight into the construction of high-performance and high-stability photocatalytic system by electrospinning technology.Keywords:photocatalytic;PAN nanofiber membrane;degradation;tetracycline;heterojunction
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-11
·
IF 3.8
Yin Cong,Peng Yinyin,Li Hongjiang,Yang Guang,Yuan Guoyuan
This study aimed to synthesize a novel nanofiber adsorbent based on metal–organic frameworks (MOFs), ZIF-94-PAN, by incorporating ZIF-94 into polyacrylonitrile (PAN) through electrospinning. The investigation of the adsorption characteristics of ZIF-94-PAN for cobalt ions was undertaken, yielding findings that suggest an optimum ZIF-94 loading content within the ZIF-94-PAN composite of 8%. The adsorption experiments revealed that, under pH 8.3 and 298 K, ZIF-94-PAN-8% attained cobalt ion equilibrium adsorption (139.08 mg/g). Additionally, the adsorption kinetics of cobalt ions exhibited conformity with the pseudo-second-order model, whereas adherence to the Freundlich isotherm model indicated a non-homogeneous, endothermic process. XPS analysis unveiled that the adsorption mechanism was characterized by the coordination of nitrogen and oxygen atoms within ZIF-94-PAN with cobalt ions. This study effectively addressed the challenges of separating and recovering MOFs adsorbents by fabricating them as nanofibers. The remarkable adsorption performance and stability of the ZIF-94-PAN nanofibers highlight their potential for removing cobalt-contaminated wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Yifei Zhan,Jianwu Lan,Jiaojiao Shang,Lin Yang,Xinmei Guan,Wenxu Li,Siqi Chen,Ying Qi,Shaojian Lin
A ZIF-8/Ag/AgCl/TiO 2 modified PAN nanofibrous mat was successfully fabricated via stepwise in-situ growth method. The morphology and composition of the resultant ZIF-8/Ag/AgCl/TiO 2 modified PAN nanofibrous mat were confirmed by emission scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectroscopy (DRS) and electrochemical impedance spectroscopy (EIS), respectively. Next, methylene blue (MB) was employed as a contaminant to evaluate photocatalytic activity of prepared composite photocatalysts under visible light and natural sunlight irradiation. As expected, the ZIF-8/Ag/AgCl/TiO 2 decorated PAN nanofibrous mat exhibited high photocatalytic activity under both light sources, owing to the synergistic effect among ZIF-8, Ag/AgCl and TiO 2 . The degradation efficiency of the targeted PAN nanofibrous mat under visible light could reach to 98.02% within 120 min towards 20 mL of 50 mg/L MB aqueous solution. Most importantly, the fabricated ZIF-8/Ag/AgCl/TiO 2 modified PAN nanofibrous mat exhibited outstanding recyclability, the corresponding degradation efficiencies were up to 90.16% after five cycles and approximately 80% after ten cycles, respectively. Additionally, the resultant nanofibrous mat showed a long-term stability against acid and alkaline, and excellent antimicrobial performance against S. aureus and E. coli .
研究领域:
材料科学
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环境科学
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生物学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Qiang Le,Zhilin Cheng
As the adsorption technique was concerned, the facile, intact and low-cost separation process of adsorbents was desirable to the prospective feasible application. In present work, the nano-Ag 2 O particles were encapsulated in the hollow nanostructure of halloysites (HNTs) with the aid of CTAB-stabilized HNTs micelle by the space confinement method, and then the nano-Ag 2 O@HNTs nanocomposite was assembled in PVP/PAN electrospinning nanofiber membrane (NFM), and finally PVP template was removed through etching method, so as to access the hierarchical-porous structure. The structure and composition of nano-Ag 2 O@HNTs/PAN NFM were resolved by a series of characterizations. The nano-Ag 2 O@HNTs/PAN NFM not only was of abundant multi-pore structure with larger specific surface area of 23.484 m 2 /g and higher pore volume of 0.111 mL/g, but also exhibited excellent mechanical performance, of which the tensile strength and Young's modulus were up to 6.1 MPa and 75.9 MPa, respectively. Thanks to the existence of the exclusive pore structure and nano-Ag 2 O, the nano-Ag 2 O@HNTs/PAN NFM showed better adsorption desulfurization performance in the simulated thiophene (TH) oil, of which the breakthrough and saturated adsorption capacity were as high as 35.269 mg/g and 54.481 mg/g, respectively. Ultimately, the adsorption mechanism of TH molecules on the nano-Ag 2 O@HNTs/PAN NFM could be taken into account the synergistic effect of the porous diffusion , interface adsorption and active site adsorption.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
Journal of Engineered Fibers and Fabrics
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2023
·
IF 2.9
Lei Zhao,Ting Zhu,Li Wei,Jumei Zhao,Qianwen Wang,Jun Wang
The PAN spinning solution was chosen as the spiral spinning research object. Laminar flow theory was used to straighten and align macromolecules, and spiral spinning needles were used to control the spiral twisting of straightened PAN macromolecules. The internal spiral arrangement of PAN nanofibers became more compact as the helix number of spinning needles increased. The TEM (transmission electron microscope) was used to photograph the motion trajectory of TiO2 (titanium dioxide) nanoparticles in nanofibers, which directly confirmed the feasibility of the spiral spinning principle. SEM (Scanning Electronic Microscopy) observations revealed that the appearance of the PAN nanofiber membranes changed to some extent under spiral physical technology. The analysis of the tensile and bursting properties of PAN nanofiber membranes demonstrated that the structure of the nanofibers changed significantly after spiral spinning. The pore structure, electrical resistance, and antibacterial properties of PAN nanofiber membrane all reached optimal values at the optimal helix number of spinning needle.
研究领域:
材料科学
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纳米技术
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生物医学工程
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Haitao Meng,Xuemei Li,Caijuan Wang,Haijun Meng,Shouzhu Li
The discharge of industrial wastewater and frequent oil spills have caused serious environmental degradation. There is an urgent need for effective oil-water separation technology to solve the problems of ecological restoration and pollution control. This study breaks through the limitations of traditional multi-step and surface modification and proposes a one-step green manufacturing strategy. The PAN matrix and SiO 2 nanoparticles are covalently linked through the -NH 2 /-C N of the bifunctional APTES molecular bridge and the Si-O-Si bond network to achieve stable interfacial anchoring. Meanwhile, during the process of preparing the separation membrane by electrospinning, hydrophobic modification and particle immobilization were completed simultaneously to construct a chemically bonded hierarchical micro/nano rough structure. This method does not require post-processing and significantly improves manufacturing efficiency and interface stability. The experimental results show that the membrane has a dual-mode separation capability, namely gravity-driven separation and continuous operation driven by the adsorption pump. It has a high separation flux and efficiency for various types of oil-water mixtures. Meanwhile, the membrane can effectively separate the water-in-oil emulsion stabilized by surfactants, with a separation efficiency exceeding 98.2%, a flux exceeding 611 L m -2 h -1 , and a flux loss of only 6.92% after 10 cycles. It is worth noting that this membrane has continuous operational durability, maintaining an efficiency of over 97% in the simulation of industrial emulsion separation (15-minute test) and a flux recovery rate of over 94% after ethanol washing. In addition, the material has excellent environmental tolerance and holds great potential in industrial applications and oil-water separation under extreme conditions.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Qiang Le,Yang Xiang,Zan Liu,Zhilin Cheng
The selective adsorption desulfurization technology is considered to be of energy conservation and environment-friendly operation. However, the ongoing development of adsorption desulfurization is greatly restricted by the adsorbents with preferable mechanical properties and sustainable separation efficiency. In this paper, a submicron-sized Cu 2 O necklace-shaped polyacrylonitrile (PAN) nanofiber composite membrane (Cu 2 O/PAN NFM) was prepared by electrospinning technology. The structure and mechanical properties of NFM were determined by a series of characterizations. The results showed that the resulting Cu 2 O/PAN-NFM has a larger total pore volume (0.0802 mL/g), higher tensile strength (5.65 MPa) and lower friction coefficient (0.2571) than those of PAN nanofiber membrane (PAN NFM). The static and dynamic adsorption performances of the Cu 2 O/PAN NFM were investigated with thiophene(TH) simulated oil. The results showed that the static and dynamic saturated adsorption capacities of the Cu 2 O/PAN NFM were up to 32.91 mg/g and 4.57 mg/g at 500 mg/L initial concentration, respectively. Besides, the adsorption kinetics and isotherms of TH on the Cu 2 O/PAN NFM indicated that the TH adsorption data are fitting to Avrami model and Liu isotherm. In addition, the exclusive notable merits of the Cu 2 O/PAN NFM expressed at the robust mechanical properties and outstanding separation efficiency while keeping the sustainable adsorption capacity after the repeated recycling, which exhibited a promising application towards adsorption desulfurization.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 9
·3913-3920
·
IF 3.069
Mengxin Zhang,Meishan Li,Wangui Wu,Junkun Chen,Xiuling Ma,Zhangjing Zhang,Shengchang Xiang
In this work, ZIF-67 decorated with polyacrylonitrile (PAN) was electrospun to obtain composite ZIF-67/PAN nanofibers, which were used to construct C-ZIF-67/PAN-800 via one-step pyrolysis at 800 °C under a N2 atmosphere. Then, a strategy for constructing a sensor for the simultaneous determination of hydroquinone (HQ) and catechol (CC) was proposed using a C-ZIF-67/PAN-800-modified glass carbon electrode (GCE). Additionally, C-ZIF-67-800 was fabricated as a reference through the pyrolysis of ZIF-67 in the absence of PAN at 800 °C. C-ZIF-67/PAN-800/GCE showed much better electrochemical activity for the simultaneous determination of HQ and CC than C-ZIF-67-800/GCE. Under optimal conditions, C-ZIF-67/PAN-800/GCE exhibited a wide detection range of 1–120 μM and 1–200 μM for HQ and CC, respectively, and both detection limits were 1.0 μM. Our work proves that the electrochemical properties of MOF-derived porous carbon materials can be tuned by electrospinning.
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
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IF 6.723
Tong Yang,Hui Yang,Shu Jun Zhen,Cheng Zhi Huang
Reproducibility in surface enhanced Raman scattering (SERS) measurements is a challenge. This work developed a facile way to make highly dispersed uniform silver nanoparticles (AgNPs) loaded in the agar/polyacrylonitrile (PAN) nanofibers by the coupling the electrospinning technology from metal complex-containing polymer solution and in situ photoreductive technique. Agar, as hydrophilic component, was introduced into the electrospinning solution considering that its abundant hydroxyl group sites could greatly improve the contents of silver ions in the polymers because of the rich silver ion chelated with the hydroxyl group, whereas hydrophilic agar was integrated with hydrophobic PAN by −OH···N≡C– hydrogen bonds as a bridge. Meanwhile, the in situ photoreductive reaction was made under different light irradiations such as desk lamp, 365 nm UV-lamp, and 254 nm UV-lamp. High yield of stable AgNPs with highly uniform and dispersion are available in the agar/PAN nanofibers after the in situ photoreductive reaction, supplying the possibility of reproducible SERS signals. To identify that concept of proof, a facile approach for the determination of malachite green (MG) in three environmental practical samples was demonstrated by using the composite nanofibrous material irradiated by 365 nm UV-lamp, giving the minimum detection concentration of MG as low as 0.1 μmol/L with a good linear response ranging from 0.1–100 μmol/L (R2 = 0.9960).
研究领域:
材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 8
·4483-4493
·
IF 11.301
Liyun Zhang,Yi He,Pingya Luo,Lan Ma,Yi Fan,Shihong Zhang,Heng Shi,Shuangshuang Li,Yiling Nie
Developing superhydrophilic/underwater superoleophobic surfaces to restrict oil pollution during oil/water separation processes has been an effective approach. However, the inevitable adsorption and aggregation of organic contaminants onto the membrane surface from complex oily sewage usually causes an irreversible decrease in flux, damages the anti-oil-fouling properties and shortens the lifespan of the separation membrane. Thus, neoteric antifouling and renewable membranes are highly desired. Herein, based on stabilized PAN nanofibers and following the assembly of a heterostructured PPy/ZnO layer with hierarchical structure onto the nanofiber surfaces, we report a robust visible-light-induced self-repairable oil/water separation membrane. The SPAN–PPy/ZnO membrane displays superhydrophilicity (≈0°) and underwater superoleophobicity (>150°) toward different oils, with robust mechanical strength (Young's modulus ≈ 408 MPa) and a high underwater oil intrusion pressure (>120 kPa). Importantly, the as-prepared membrane not only exhibits ultrafast permeation flux and high separation efficiency for oil/dye/water emulsions, but it also displays robust recovery abilities (96%) from organic pollutants after 20 min of light irradiation. We anticipate that this composite membrane with outstanding separation capabilities and robust flux recovery capabilities can provide a novel method for the treatment and purification of large volumes of wastewater.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 9
·1239
·
IF 4.7
Cong Yin,Yang Luo,Ting Pan,Liting Ding,Chenghuang Wang,Guoyuan Yuan,Chongxiong Duan
Recovering cobalt from waste batteries is crucial for resource recycling and environmental protection. Here, MOF-OH, a Zr-based MOF, was synthesized and merged into a polyacrylonitrile (PAN) matrix to create MOF-OH-PAN nanofibers (NFs). These NFs showed a high cobalt ion adsorption capacity of 33.1 mg/g, retaining over 90% of the capacity after six cycles. The adsorption mechanism involves Co(II) surface diffusion followed by strong bonding with functional groups. This technology enables efficient cobalt recovery from waste batteries, supporting reuse and reducing resource depletion and environmental pollution. The study provides insights into waste battery resource management, highlighting environmental and economic benefits and contributing to green resource recovery and circular economy initiatives.
研究领域:
材料科学
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环境科学
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资源回收
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FIBERS AND POLYMERS
·
2025
·
IF 2.3
Yan Hongsheng,Xiong Jie,Du Peijian,Wu Ermiao,Pan Tiandi,Li Ni
The construction of semiconductor heterojunctions is an effective way to enhance the photocatalytic activity. In this work, n–p heterojunction composed of ZnO nanorods and polypyrrole (PPy) nanospheres were loaded on polyacrylonitrile (PAN) nanofibers to fabricate ZnO/PPy/PAN nanofiber membranes (ZnO/PPy/PAN NFMs) via electrospinning, hydrothermal synthesis and chemical polymerization. The results showed that the photodegradation rate of ZnO/PPy/PAN NFM was about 4.8 times higher than that of ZnO/PAN NFM. Moreover, the membrane exhibited good cycling stability, which maintained the removal efficiency of rhodamine (RhB) at 79% after five cycles. The enhanced photocatalytic activity was mainly ascribed to the synergistic effect of PAN nanofibers adsorption and n–p heterojunctions catalysis, resulting in a narrow bandgap, an increase in the absorption of visible light and the separation efficiency of electron–hole. Meanwhile, the degradation mechanism of ZnO/PPy/PAN NFMs was proposed. This work provides a promising strategy to construct n–p heterojunction photocatalysts for removing organic pollutants in wastewater.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）