NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 29
·13931-13939
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IF 3.925
Nan Sun,Yuhan Jing,Yong Zhang,Xinru Li,Yaoning Bai,Yuwei Yan,Taoyuan Ouyang,Honglin Tan,Xiaoming Cai,Jinming Cai
Copper-based photocatalysts have attracted much attention because of their great prospects in photochemical conversion. However, the preparation of highly stable copper-based photocatalysts is a challenge. In this study, copper nanoparticles (Cu NPs) wrapped in graphitized polyacrylonitrile (g-PAN) were prepared by a two-step sintering method. Even if Cu@g-PAN is placed in the air for one month, the Cu NPs were still not oxidized. Furthermore, we succeeded in further introducing graphitized carbon nitride (g-C3N4) into the g-PAN shell structure, which was confirmed using a Scanning Transmission Electron Microscope (STEM), FT-IR, and UV-Vis absorption spectra. Cu@g-PAN/g-C3N4 can degrade 88.61% of methylene blue (MB) in one hour, showing a higher catalytic activity than Ag@g-PAN/g-C3N4 (55.18%). XPS and Auger electron spectroscopy tests of catalyzed Cu@g-PAN/g-C3N4 show that Cu is not oxidized. We have proposed a possible mechanism for charge separation and transformation in the Cu@g-PAN/g-C3N4 composites to explain the enhanced photocatalytic performance. This work provides a new method to protect Cu NPs and demonstrates the prospect of rational design of copper-based photocatalysts with high stability and efficiency.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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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
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 24
·245710
·
IF 3.5
Ben Niu,Zhenyu Zhai,Jiaona Wang,Congju Li
Znic-based metal–organic framework materials (ZIF-8) show great potential and excellent performance in the fields of sensing and catalysis. However, powdered metal–organic framework makes it easy to lose in the process of application. Herein, we use a simple blending electrostatic spinning method to combine ZIF-8 particles with polyacrylonitrile (PAN) nanofibers. ZIF-8/PAN composite nanofiber membrane. The ZIF-8/PAN nanofiber membrane is characterized by scanning electron microscope (SEM), x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and N2 adsorption–desorption. The results show that the ZIF-8/PAN nanofiber membrane has the characteristic peaks of XRD and FTIR, which are consistent with those of simulated ZIF-8. The specific surface area of ZIF-8/PAN nanofiber membrane increases from 13.5371 to 711.4171 m2 g−1 due to the introduction of ZIF-8 particles. The sensor using the nanofiber membrane as the gas sensing layer shows good response and linear correlation to different concentrations of acetone gas. The minimum detection limit of the sensor for acetone is 51.9 ppm. The blank control shows that the response of the sensor to acetone is mainly due to the introduction of ZIF-8 particles. In addition, the sensor also shows a good cyclic response to acetone.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Pingping Teng,Jiabao Zhu,Zhiang Li,Kang Li,Nigel Copner,Shuai Gao,Enming Zhao,Xiaoliang Zhu,Zhihai Liu,Fengjun Tian,Yu Zhang
In this paper, one-dimensional PAN-Bi 2 O 2 CO 3 –BiOI photocatalytic nanofibers were prepared using flexible PAN nanofibers as carriers. Bi 2 O 2 CO 3 was first grown on the surface of PAN nanofibers, and then BiOI was loaded on Bi 2 O 2 CO 3 by ion exchange method. The characterization results showed that PAN-Bi 2 O 2 CO 3 –BiOI nanofibers have a diameter of about 210 nm and regular fiber morphology. The results of UV–Vis diffuse reflectance spectroscopy, XRD and XPS showed that Bi 2 O 2 CO 3 –BiOI composed of granular semiconductor nano heterostructures with high specific surface area were uniformly loaded on the surface of PAN fiber . The photocatalytic degradation experiment of the material showed high visible light photocatalytic activity . The preparation of Bi 2 O 2 CO 3 –BiOI heterojunction improved the photoelectron hole separation efficiency of BiOI under visible light. PAN-Bi 2 O 2 CO 3 –BiOI fibers showed high photocatalytic degradation efficiency for rhodamine B. The degradation efficiency was more than 95% within 120 min irradiation. Free radical trapping experiments showed photocatalysts mainly produced O 2 − ,·OH and h + , which played a major role in photocatalysis .
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Yuanhui Li,Xinyue Yang,Chongxiao Yuan,Xiao Li,Xiang Liu,Huiling Guo,Huajun Sun
While flexible self-powered electronic devices have shown promising prospects for development, substantial challenges remain in enhancing their power output and structural integrity. This study investigates the fabrication of organic piezoelectric nanofibers with a coaxial structure, achieved by electrospinning polyvinylidene fluoride (PVDF) and polyacrylonitrile (PAN), incorporating carbon nanotubes (CNTs). Due to the viscosity differences between PVDF and PAN, the electrospinning process results in a coaxial morphology. The interactions between the dipoles and hydrogen bonds of PAN and PVDF promote the formation of a piezoelectric active phase. The introduction of CNTs as nucleating agents enhances the β-phase content of PVDF and promotes the planar zigzag conformation of PAN. After hot pressing, the resulting terpolymer composite fiber films, are used to construct piezoelectric energy harvesting devices (PEHs). The P/P/C-0.2 PEH, containing 0.20 wt% CNT and 20 wt% PAN, achieves a high open-circuit voltage (V OC ) of approximately 13.7 V and a maximum power density of 0.75 μW/cm 2 in bend-release mode. This device exhibits a stable voltage output over 10,000 cycles, maintaining an output voltage of 7.5 V at 75 °C. Additionally, the PEH effectively captures mechanical energy from human movement. This research presents a promising approach to enhancing the piezoelectric output of flexible piezoelectric devices.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
IONICS
·
2024
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IF 2.4
Mohite Dadaso D.,Chavan Sachin S.,Dubal Sumit,Lokhande P. E.,Kadam Vishal,Jagtap Chaitali,Rednam Udayabhaskar,Ansar Sabah,Kumar Yedluri Anil
The material used for electrodes greatly affects the electrochemical performance of a supercapacitor. This study utilized electrospinning to create ZnO/Polyacrylonitrile (PAN) composite-based nanofibers, which were then heat-treated to form carbon nanofibers (CNFs). The ZnO/PAN-NFs and the resulting ZnO and PAN CNFs were thoroughly characterized for their crystallographic and morphological properties. Electrodes made from ZnO and PAN-based CNFs demonstrated a peak capacitance of 163.44 F g −1 at a scan rate of 10 mV s −1 , which is a 64% increase over electrodes made from PAN CNFs, in addition to enhanced cyclic stability and rate capability. An asymmetric supercapacitor constructed with ZnO/PAN-CNFs//AC showed an energy density of 6.1 Wh kg −1 and a power density of 1000 W kg −1 . The device also exhibited outstanding longevity and electrochemical reversibility, maintaining 84% of its specific capacitance after 5000 cycles. This research seeks to investigate the unique structural and electrochemical properties of the electrospun ZnO/PAN nanocomposite material, contributing to the advancement of high-performance supercapacitor electrodes.
研究领域:
材料科学
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电化学工程
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能源存储技术
✓ 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
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Zewen Yang,Kunjie Zhu,Zihao Dong,Dandan Jia,Lifang Jiao
Lithium–selenium (Li–Se) batteries have recently attracted more and more attentions as new secondary battery systems due to the similarity but better performances than lithium–sulfur (Li–S) batteries. However, the dissolution of selenium in electrolytes results in low selenium utilization, concentration polarization, inferior capacities, and unstable cycling performances. Herein, 46.58 wt% of selenium is loaded on carbon cloths through the calcination process, which were directly used as self-supporting cathodes. Carbonized polyacrylonitrile (PAN) nanofiber membranes produced by electrospinning are worn as the protective clothing between the cathode and separator to avoid the loss and dissolution of selenium. The stabilization of Li–Se batteries was enhanced by introducing two interlayers, as expected, they exhibit a stable reversible average capacity of 590 mA h g–1 during 1000 cycles at a current density of 0.5 C (1 C = 675 mA g–1). No polyselenide formation is found during charging/discharging, and the effects of the introduced PAN interlayers on improving the stability and reducing the polarization of the assembled Li–Se batteries are confirmed by mechanistic characterizations. These regulated Li–Se batteries present great application potential in the future, and the design idea can also be promoted to explore other energy storage systems.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Song Xiao,Menglei Jin,Junyi Chen,Peng Wu,Ju Tang,Yi Luo,Yi Li
Perfluoroisobutyronitrile (C 4 F 7 N) mixed with CO 2 has emerged as a promising eco-friendly alternative to sulfur hexafluoride (SF 6 ) in gas-insulated equipment (GIE). However, thermal or discharge faults in GIE inevitably lead to the generation of harmful decomposition by-products, necessitating their prompt removal to safeguard equipment operation and personnel safety. In this study, we propose a nanofiber composite material comprising polyacrylonitrile (PAN) as the base and multi-metal organic frameworks (MOFs) as the primary adsorbent material for removing typical decomposition components of C 4 F 7 N/CO 2 gas mixture. Utilizing grand canonical Monte Carlo (GCMC) and molecular dynamics (MD) simulations, we elucidate the selective adsorption mechanisms. Experimental results show that PAN@HKUST-1(Cu) exhibits superior adsorption efficiency for fluorocarbon gases compared to PAN@MIL-101(Cr), while the latter demonstrates better performance for nitrile gases. The PAN@HKUST-1(Cu)/MIL-101(Cr) composite adsorbent effectively removes eight typical harmful decomposition products while minimally affecting C 4 F 7 N. Our findings suggest that PAN@HKUST-1(Cu)/MIL-101(Cr) nanofiber film holds promise as an adsorbent for C 4 F 7 N/CO 2 based GIE.
研究领域:
材料科学
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环境工程
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化学工程
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纳米技术
✓ 已验证
DOI
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
✓ 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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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 4
·1312-1326
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IF 3.5
Song Keru,Huang Siyu,Wang Jianwen,Shi Fengyue,Hu Songyu,Zhao Guangdong
Novel Si 3 N 4 /PAN/SiZrOCN ceramic aerogel composites, which have excellent wave transmission functions, were prepared through electrospinning, freeze-drying, and high-temperature pyrolysis. Polyvinyl alcohol was used as the aerogel carbon skeleton, polystyrene served as the pore-forming substance, Si 3 N 4 /PAN fiber was used as the reinforcement material. The pore size distribution and dielectric properties of the composites were systematically studied at different pyrolysis temperatures. An increase in pyrolysis temperatures led to a decrease in the specific surface area and dielectric constant. Fourier infrared spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction were employed to investigate the polymerization mechanism and ceramic process of the precursor. The Brunauer–Emmett–Teller test revealed that the maximum specific surface area of Si 3 N 4 /PAN/SiZrOCN ceramic aerogel composites was 109.261 m 2 /g, and the average pore size was 4.56 nm when sintered at 600 °C. The dielectric properties test results showed a dielectric constant ranging between 3.1 and 3.7 and a dielectric loss tangent value between 2.6 × 10 –3 and 1.6 × 10 –2 for the sample. Si 3 N 4 /PAN/SiZrOCN ceramic aerogel composites exhibited excellent dielectric properties at room temperature and demonstrated exceptional dielectric stability across different frequency bands (1.8–18.0 GHz), making them a potential high-temperature wave-transmittance material.
研究领域:
材料科学
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无机化学
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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）