ChemistrySelect
·
2024
·Vol. 9
·期 40
·e202403768
·
IF 1.9
Dadaso D. Mohite,Sachin S. Chavan,Vijay K. Kurkute,P. E. Lokhande,Vishal Kadam,Chaitali Jagtap,Udayabhaskar Rednam,Mushtaq Ahmad Ansari,Yedluri Anil Kumar
Graphical MnO 2 -doped PAN carbon nanofibers are created via electrospinning and subsequent carburization, with the resultant fibers serving as electrodes in supercapacitors. The individual electrode derived from these CNFs demonstrates exceptional specific capacitance and cyclic stability. Moreover, the fully solid-state asymmetric supercapacitor assembled with this electrode material exhibits remarkable electrochemical behavior. Supercapacitors (SCs) are crucial for high-performance energy storage, offering high power density, swift charge–discharge rates, and durability. The enhancement of their performance hinges on the development of advanced electrode materials. This study presents an innovative method involving polyacrylonitrile (PAN) nanofibers adorned with manganese dioxide (MnO₂) nanoparticles (NPs), created through electrospinning and subsequent thermal treatment. This synergy exploits the extensive surface area and electrical conductivity of PAN nanofibers along with the substantial capacitance of MnO₂. The MnO₂-coated PAN nanofibers reached an impressive specific capacitance of 247 F g −1 at a scan rate of 10 mVs −1 , markedly boosting the efficacy of all-solid-state asymmetric SCs. The SCs, incorporating a polyvinyl alcohol (PVA)/potassium hydroxide (KOH) gel electrolyte, exhibited an energy density of 8.2 Wh kg −1 at a power density of 700 W kg −1 , preserving 80.4% of their original capacitance after 5000 cycles. This research is pioneering in combining MnO₂ with PAN nanofibers, marking a significant leap forward in supercapacitor technology with enhanced energy storage capacity and prolonged stability. These findings underscore the promise of these composite materials in future energy storage solutions.
研究领域:
材料科学
·
能源存储技术
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DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Peng Liu,Linshan Wu,Xiulin Huang,Zhiguang Guo
Membrane materials are widely used in the treatment of oily wastewater. In this work, hybrid nanofibrous membranes of polyacrylonitrile (PAN) and polytetrafluoroethylene-hexafluoropropylene (PVDF-HPF) were prepared by electrospinning and cured at high temperature. Subsequent hydrothermal treatment to grow Mg/Al-LDHs and polymerization of tannic acid (TA) on the surface yielded WPPLT membranes. SEM and EDS tests showed that the WPPLT membranes had a uniform compositional distribution. AFM tests showed that the hydrothermal and tannic acid treatments increased the roughness of the membranes and imparted a superhydrophilicity to the membranes. Separation tests of the emulsion showed that the separation efficiency was above 99 % with stable flux due to the fine pore size of the nanofiber membrane and the positive charge effect of the LDHs. Mechanical tensile tests showed that the tensile strength of the WPPLT membrane was 4.1 MPa, which was 89 % higher relative to the electrospinning membrane. Finally, the synergistic effect of LDHs and tannic acid under UV irradiation achieved more than 90 % degradation efficiency of methylene blue (MB). The present work provides new insights to improve the mechanical properties of nanofiber membranes, which helps the membranes to be used in more complex environments and enhances the prospect of their application in oil and water pollution.
研究领域:
材料科学
·
环境工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2015
·Vol. 50
·期 24
·8120-8127
·
IF 2.371
Liu Yongkun,Jiang Guohua,Li Lei,Chen Hua,Huang Qin,Jiang Tengteng,Du Xiangxiang,Chen Wenxing
Due to their high surface energy, naked gold nanoparticles (AuNPs) tend to form agglomerates, which could lead to the decrease of active sites and catalytic activity of AuNPs. Herein, the gold nanoparticles/polyacrylonitrile (AuNPs/PAN) nanofibrous membranes have been prepared via an environmentally friendly and efficient route combining electrospinning, amination, and electroless plating technique. The abundant amine and imine groups can be introduced onto the surface of PAN nanofibrous membranes via amination treatment which could be used as “anchoring sites” to immobilize AuNPs. The resultant composite membranes were applied as the new catalytic materials for reduction of 4-nitrophenol to 4-aminophenol under room temperature. The new catalytic membranes exhibited the significant advantages, such as low dosage, high catalytic activity, easy recycling, and excellent stability.
研究领域:
材料科学
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环境科学
·
化学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Luyao Jiang,Jianhua Yun,Yixing Wang,Hu Yang,Zhi Xu,Zhen-liang Xu
Polyamidoamine (PAMAM) dendrimers grafted Polyacrylonitrile (PAN) UF membrane (PAN-PAMAM) was prepared for the first time. The optimized PAN-PAMAM membrane showed both a high flux (420 L m −2 h −1 .bar −1 ) and a good BSA rejection (99%). To improve its hydrophilicity, the membrane was further modified with ethanolamine (ETA) under different conditions. The results suggest that PAN-PAMAM membrane modified by ETA/NaOH has an improved antifouling property for sodium alginate (SA), humic acid (HA) and bovine serum albumin (BSA), the flux recover ratio (FRR) increased from 61% to above 91%. Moreover, the modified membrane shows a better antifouling property in phosphate-buffered saline (PBS) solution than in water solution. DLS results showed that BSA aggregate morphology are different in two solutions. AFM image and BSA adsorption revealed that PBS decreases the coverage and amount of BSA adsorbed on the membrane surface, leading to an improved antifouling property. Surface tension and XDLVO theory were further used to analyze the fouling process. It was found that ETA/NaOH modification greatly increases the Lewis acid-base interfacial interaction of membrane. However, after the adsorption of BSA, Lewis acid-base interaction decreases greatly, leading to the irreversible fouling of membrane.
研究领域:
材料科学
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环境工程
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生物医学
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DOI
高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Ting-Ting Li,Xiangdong Fu,Xuefei Zhang,Bing-Chiuan Shiu,Jia-Horng Lin,Ching-Wen Lou
To fulfill the growing demand for durable and deformable flexible wearables, this study proposes a fibrous zinc ion battery negative electrode that is low-cost, easy to prepare, and similar to the flexible yarn. We have constructed a new type of carbon fiber/polyacrylonitrile(PAN)/polypyrrole(PPy) Zn electrode (CPP@Zn yarn electrode). Based on carbon fiber yarn, PAN wrapped carbon yarn (CP yarn) was prepared by electrospinning. PPy nanoparticles were deposited on CP yarn by in-situ polymerization to get the highly conductive yarn (CPP yarn). Finally, Zn is deposited on the CPP yarn by electrodeposition to obtain the CPP@Zn yarn electrode. When the deposition voltage is 1 V and the time is 30 min, the flexibility and the Zn crystal morphology of the CPP@Zn yarn electrode are the best, the specific capacity is the highest. When the current density is 0.04 A·cm −1 , the specific capacity can reach 981.3 mF·cm −1 and the energy density is 0.18 W·h·cm −1 . After cyclic charge and discharge repeated 300 times, 87.76% of the original specific capacity can still be maintained. After bending the CPP@Zn yarn electrode for 500 times, the specific capacitance can still maintain 86.13% of the original specific capacitance. The yarn electrode has excellent electrochemical stability and flexibility, and it has broad application prospects in wearable smart textiles .
研究领域:
材料科学
·
电化学
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DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Zhihao Zhang,Md All Amin Newton,Xue Yang,Binjie Xin
In this study, a novel red fluorescent materials were prepared by incorporating Eu/PVP/TPPO complexes into PAN substrates. An Eu/PVP/TPPO complex was synthesized by introducing polyvinylpyrrolidone (PVP) into a mixture of europium (Eu) and triphenylphosphine oxide (TPPO). Using a spin-coating technique, highly efficient and thermally stable Eu/PVP/TPPO/polyacrylonitrile (PAN) fluorescent films were prepared. The molecular interactions , surface morphology , functional groups, and elements of the Eu/PVP/TPPO/PAN fluorescent films were characterized by FT-IR, SEM, UV–Vis, and EDS analysis. The thermal stability, fluorescent properties, and chromaticity of the films were also systematically investigated. The results showed that the Eu/PVP/TPPO complex could disperse uniformly in the substrate, and the fluorescent films could emit homogeneous red light. Furthermore, the Eu/PVP/TPPO/PAN fluorescent films had a strong synergistic effect, which increased the fluorescence intensity and produced a purer red light. Based on these findings, a new type of redlight LED device was fabricated by one-step method. Due to its outstanding properties, this film has great potential in the next generation of lighting and display applications.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
Carbon Letters
·
2023
·
IF 4.5
Lu Tong,Zhang Qingxia,Yang Jingjing,Xin Yue,Zhang Zhilei,Hu Lingye,Hu Jing,Qin Qin,Yang Hao
The discharge of industrial oily wastewater and oil spill accidents has resulted in significant environmental pollution, creating an urgent need for the treatment of oily wastewater. Nanofiber membranes, known for their high stability, flux, and efficiency, are widely employed in oil–water separation. This study systematically compared the performance of polyacrylonitrile/graphene oxide (PAN/GO) composite nanofiber membranes prepared through immersion and electrospinning methods for oily wastewater treatment. Experimental findings demonstrated that immersion-prepared membranes achieved high flux (772.9 ± 2.9 L·m −2 ·h −1 , n-hexane/water mixture) and efficiency (98.8%) at a GO concentration of 1.0 g/mL. On the other hand, electrospinning-prepared membranes exhibited superior flux (1500.3 ± 4.4 L·m −2 ·h −1 , n-hexane/water mixture) and efficiency (99.6%) at a higher GO concentration (1.5 g/mL). This membrane displayed excellent stability, maintaining their exceptional performance even after ten cycles of separation. This study compared the advantages and disadvantages of the two methods for preparation of PAN/GO composite nanofiber membrane, offering valuable guidance for practical applications.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xianjing Zhou,Jingjing Nie,Binyang Du
A functional ionic microgel sensor array was developed by using 1-(2-pyridinylazo)-2-naphthaleno (PAN)- and bromothymol blue (BTB)-functionalized ionic microgels, which were designed and synthesized by quaternization reaction and anion-exchange reaction, respectively. The PAN microgels (PAN-MG) and BTB microgels (BTB-MG) were spherical in shape with a narrow size distribution and exhibited characteristic colors in aqueous solution in the presence of various trace-metal ions, which could be visually distinguished by the naked eye. Such microgels could be used for the colorimetric detection of various metal ions in aqueous solution at submicromolar levels, which were lower than the U.S. Environmental Protection Agency standard for the safety limit of metal ions in drinking water. A total of 10 species of metal ions in aqueous solution, Ba2+, Cr3+, Mn2+, Pb2+, Fe3+, Co2+, Zn2+, Ni2+, Cu2+, and Al3+, were successfully discriminated by the as-constructed microgel sensor array combined with discriminant analysis, agglomerative hierarchical clustering, and leave-one-out cross-validation analysis.
研究领域:
分析化学
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环境科学
·
材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ruoxuan Zheng,Wan-Lei Zhao,Hongqiang Li,Hanbin Hu,Tong Lin,Wei Chen,Yu-Fei Song
The effective removal of Cu 2+ ions from contaminated wastewater is greatly significant for environmental remediation. Herein, the PAN@LDH-Hpdc (PAN = polyacrylonitrile; LDH = layered double hydroxide; Hpdc = pyrazole-3,5-dicarboxylate) was prepared using the “Seeds Embedded-Epitaxial Growth-Ion exchange” strategy. Benefiting from the high surface area and abundant exposed active sites, the PAN@LDH-Hpdc showed the removal efficiency of 99.6 % in 25 min, and the Cu 2+ ions (10 ppm) can be decreased to reach the WHO drinking water standard in 10 min. When the concentration of Cu 2+ ions was ∼ 1000 ppm, the adsorption capacity of PAN@LDH-Hpdc was as high as 200.0 mg/g. In addition, the PAN@LDH-Hpdc exhibited high selectivity for Cu 2+ ions with the removal efficiency of 99.9 % in the mixed solution containing Na + , Mg 2+ , K + , Ca 2+ , Cu 2+ , Ni 2+ , Zn 2+ and Co 2+ ions. The adsorption mechanisms of PAN@LDH-Hpdc involved the coordination by the intercalated Hpdc anions and surface adsorption by the LDH laminate.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2024
·Vol. 47
·期 14
·2400314
·
IF 2.8
Ping Su,Qiqi Wang,Mengxi Li,Xinrui Tian,Jiayi Song,Yi Yang
In this work, a novel electrospun nanofiber (PAN/TpBD; 2,4,6-triformylphloroglucinol [Tp] and benzidine [BD]; polyacrylonitrile [PAN]) was fabricated via a facile electrospinning method and utilized as adsorbent in thin film microextraction (TFME) of phthalate esters (PAEs) (dimethyl phthalate, diethyl phthalate, diallyl phthalate, dibutyl phthalate, and dioctyl phthalate) in biodegradable plastics. The prepared PAN/TpBD combines the strong stability of nanofibers with increased exposure sites for covalent organic frameworks and enhanced interactions with the target, thus improving the enrichment effect on the target. The extraction efficiency of PAN/TpBD reached above 80%. Based on PAN/TpBD, a TFME-high-performance liquid chromatography method was established, and the experimental parameters were optimized. Under the optimal extraction conditions, the PAEs of this method varied linearly in the range of 10–10 000 µg/L with low detection limits (0.69–2.72 µg/L). The intra-day and inter-day relative standard deviation values of the PAEs were less than 8.04% and 8.73%, respectively. The adsorbent can achieve more than 80% recovery of the five targets after six times reuse. The developed method was successfully applied for the determination of trace PAEs in biodegradable plastics with recoveries ranging from 80.1% to 113.4% and relative standard deviations were less than 9.45%. The as-synthesized PAN/TpBD adsorbent exhibited great potential in PAE analysis.
研究领域:
分析化学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yeqiang Lu,Yawen Zhao,Yuexiu Li,Zhihao Li,Congjie Gao,Lei Qin,Zhishan Chen,Lixin Xue
Superwetting membrane have gained significant attention as a highly effective solution for oily wastewater treatment. However, its effectiveness was restricted when separating different types of oil-in-water (O/W) and water-in-oil (W/O) emulsions due to the limited single wettability of the membrane surfaces. Developing superwetting membranes with broad applicability and high separation efficiency is crucial for the continued advancement of membrane separation technology. In this study, a hydrophilic polymer, poly 2-hydroxybutyl methacrylate (PHBMA) was introduced into the polyacrylonitrile (PAN) substrate, and zeolitic imidazolate framework-90 (ZIF-90) particles were synchronously grown and in-situ immobilized on the membrane surface in process of phase inversion, forming a ZIF-90@P-PAN membrane with switchable superwettability. With increasing ZIF-90 growth time, the membrane surface first became rougher due to crystal formation, then gradually denser as particle accumulation increased. This membrane exhibited super-amphiphilicity in air and super-amphiphobicity under liquid, demonstrating high permeation flux and excellent separation efficiency (>99 %) for different types of emulsions. The effects of ZIF-90 particles with different growth times on the membrane morphology, wettability and oil–water separation performance were systematically studied. Additionally, the removal efficiency (>80 %) and recycling performance of the ZIF-90@P-PAN membrane for four different heavy metal ions were investigated. This work contributed to the development of superwetting membranes for efficient recovery of oily wastewater.
研究领域:
膜科学
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环境工程
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材料科学
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化学工程
·
纳米技术
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产品关联
DOI
高影响因子
Signal Transduction and Targeted Therapy
·
2024
·Vol. 9
·期 1
·1-13
·
IF 40.8
Yang Minghui,Li Chunhui,Ye Guoguo,Shen Chenguang,Shi Huiping,Zhong Liping,Tian Yuxin,Zhao Mengyuan,Wu Pengfei,Hussain Abid,Zhang Tian,Yang Haiyin,Yang Jun,Weng Yuhua,Liu Xinyue,Wang Zhimin,Gan Lu,Zhang Qianyu,Liu Yingxia,Yang Ge,Huang Yuanyu,Zhao Yongxiang
Emerging and recurrent infectious diseases caused by human coronaviruses (HCoVs) continue to pose a significant threat to global public health security. In light of this ongoing threat, the development of a broad-spectrum drug to combat HCoVs is an urgently priority. Herein, we report a series of anti-pan-coronavirus ssDNA aptamers screened using Systematic Evolution of Ligands by Exponential Enrichment (SELEX). These aptamers have nanomolar affinity with the nucleocapsid protein (NP) of Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and also show excellent binding efficiency to the N proteins of both SARS, MERS, HCoV-OC43 and -NL63 with affinity K D values of 1.31 to 135.36 nM. Such aptamer-based therapeutics exhibited potent antiviral activity against both the authentic SARS-CoV-2 prototype strain and the Omicron variant (BA.5) with EC 50 values at 2.00 nM and 41.08 nM, respectively. The protein docking analysis also evidenced that these aptamers exhibit strong affinities for N proteins of pan-coronavirus and other HCoVs (−229E and -HKU1). In conclusion, we have identified six aptamers with a high pan-coronavirus antiviral activity, which could potentially serve as an effective strategy for preventing infections by unknown coronaviruses and addressing the ongoing global health threat.
研究领域:
病毒学
·
分子生物学
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药物开发
·
传染病
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）