JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 14
·10147-10159
·
IF 2.993
Wu Xiao-Qiong,Shen Jiang-Shan,Zhao Fei,Shao Zai-Dong,Zhong Lu-Bin,Zheng Yu-Ming
Semiconductor photocatalysis is a promising technology for removing contaminants from water. Particularly, visible-light photocatalysis has attracted much attention because of its potential to utilize solar energy. However, nano-sized visible-light-driven photocatalysts easily aggregate during water treatment. Besides, it is difficult to recycle them from treated systems. Therefore, it is of great importance to develop visible-light-responsive immobilized photocatalysts with high activity. In this work, MWCNTs/Ag 3 PO 4 /polyacrylonitrile (PAN) ternary composite fiber membranes (TCFMs) with good photocatalytic performance were fabricated by electrospinning technique combined with in situ Ag 3 PO 4 forming reaction. Due to the addition of MWCNTs, the band gap of MWCNTs/Ag 3 PO 4 /PAN TCFMs became narrower than that of Ag 3 PO 4 /PAN binary composite fiber membranes (BCFMs), which made MWCNTs/Ag 3 PO 4 /PAN TCFMs be able to use light at longer wavelengths. Compared with Ag 3 PO 4 /PAN BCFMs, the as-prepared MWCNTs/Ag 3 PO 4 /PAN TCFMs showed enhanced photocatalytic activity and stability for degrading rhodamine B (RhB) in batch processing systems, which mainly ascribed to fast electron transfer from Ag 3 PO 4 to MWCNTs and the resulting high electron–hole (e − –h + ) separation efficiency. Radical trapping experiments revealed that holes (h + ) and superoxide radicals ( · O 2 − ) played primary roles in RhB degradation. In addition, the flexible MWCNTs/Ag 3 PO 4 /PAN TCFMs also showed potential practical application in the continuous wastewater treatment by a suitable photocatalytic membrane reactor. This work provides a facile approach to prepare flexible supported photocatalytic membrane with visible-light response, high activity and good stability.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Qiang Le,Zhilin Cheng
The higher energy consumption and processing cost greatly constricted the extensive application of the adsorption desulfurization technique. Herein, the nano-Ag 2 O/ZIF-8@ polyacrylonitrile (PAN) nanofiber membrane (NFM) was successfully made by using electrospinning and microwave-assisted synthesis. The characterizations demonstrated that the nano-Ag 2 O-dotted ZIF-8 with the exclusive corncob-like structure uniformly grew on the surface of PAN nanofiber. The in-situ fabrication of nano-Ag 2 O/ZIF-8 on the surface of PAN nanofiber was rapidly realized by microwave-assisted method, thus resulting in the less loss of the mechanical performance of NFM. The tests indicated that the tensile strength and young's modulus of Ag 2 O/ZIF-8@PAN NFM were 35 % and 185 % higher than PAN NFM, respectively. The fabrication of the multi-pore structure endowed the Ag 2 O/ZIF-8@PAN NFM to achieve the superior adsorption performance for thiophene (TH) from fuel oil, having the increase by 312 % and 175 % in the batch adsorption (maximum: 37.142 mg·g −1 ) and fixed-bed breakthrough adsorption (maximum: 35.423 mg·g −1 ) capacities compared to PAN NFM, respectively. Furthermore, the saturated adsorption capacity of Ag 2 O/ZIF-8@PAN NFM in fixed-bed adsorption experiment was higher than those of Cu 2 O-doped PAN NFM (4.571 mg·g −1 ) and Ag 2 O@HNTs-doped PAN NFM (31.982 mg·g −1 ) reported by our previous study. The adsorption mechanism of TH molecules on the Ag 2 O/ZIF-8@PAN NFM was explored by the kinetics, intra-particle diffusion, isotherms and thermodynamic models, which affirmed to exist the synergistic effect of physical adsorption, and chemical adsorption including π-complexation interaction and S-M interaction adsorption. Finally, this work provided a novel prospective adsorption desulfurization based on the membrane separation.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Temitope Fausat Ajibade,Huali Tian,Kayode Hassan Lasisi,Qiang Xue,Weihao Yao,Kaisong Zhang
Despite advances in membrane technology, the separation of complex oily wastewater using membrane filtration remains a daunting challenge for the industry. Recent approaches including membrane modification with two-dimensional (2D) nanosheets, showed susceptibility to swelling, fouling, and instability during operation. As a game-changer approach, a polyacrylonitrile (PAN) UF membrane modified with 3D nanostructured composite of MXene and O-MWCNT was introduced for the first time to treat complex oily wastewater. The composite membrane showed high separation performance of soluble dye-oil-water emulsion while maintaining high water permeability. Moreover, during the operational period, the composite membrane exhibits excellent antifouling and anti-swelling properties due to the synergetic effects conferred by the 3D nanostructures. Furthermore, the composite membrane possesses remarkable chemical stability evidenced by its high corrosion resistance when exposed to a strong acid (3 M HCl) and oxidant (NaOCl) solution for a long-time period. Overall, the operational stability was maintained in terms of flux and high rejection of oil and dye over a 45 h long-term operation. Consequently, this work provides an innovative, stable, and highly facile process for fabricating scalable UF composite membrane for the treatment of complex oily wastewater in a harsh chemical environment.
研究领域:
环境工程
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膜技术
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废水处理
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 8
·4483-4493
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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
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Ning Li,Wenyi Wang,Liuyong Zhu,Wenguang Cui,Xingyu Chen,Bingjie Zhang,Zezhou Zhang
Nanofiber membranes (NFMs) prepared with electrostatic spinning have attracted more and more attention in wastewater treatment owing to its unique advantages of high porosity and large specific surface area. However, the low removal rate of small molecular weight dyes and membrane fouling are the main obstacles for its large-scale application. Therefore, new polyacrylonitrile (PAN)-ZnO NFM was prepared simply and efficiently combined with electrostatic spinning technology and magnetron sputtering. Under the action of electrocatalysis, PAN-ZnO NFM exhibited not only high removal rate (>95%) for Congo red (CR), rhodamine B (RhB), sunset yellow (YS), methyl orange (MO) and methylene blue (MB), but also excellent water flux (1016 L m −2 h −1 Bar −1 ). Moreover, the electrocatalytic stability investigation of PAN-ZnO NFM showed that the membrane still maintained an excellent dye removal rate (>90%) after 10 h of continuous electrocatalytic filtration. Apart from, PAN-ZnO NFM also displayed excellent mechanical properties (252 MPa of Young's modulus) and antifouling ability. The permeate flux recovery rate of more than 90% after electrocatalytic cleaning for 5 min. Due to its excellent properties in dye removal rate, water flux, electrocatalytic stability, and antifouling, PAN-ZnO NFM exhibited an excellent application prospect in textile wastewater treatment.
研究领域:
环境科学
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材料科学
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废水处理
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Shugang Xu,Yuanfa Liu,Yue Yu,Xitong Zhang,Jun Zhang,Yanfen Li
The polyacrylonitrile/polyvinylidene fluoride (PAN/PVDF) chelating membrane with amidoxime groups was prepared to simultaneously remove metallic and organic pollutants from mimic industrial wastewater. The main purpose of this study is to investigate the interaction between metal ions and protein molecules, and synergistic effects on the pollutant removal efficiency through the chelating membrane. Lysozyme and bovine serum albumin (BSA) were used as organic pollutants and Cu 2+ , Pb 2+ and Cd 2+ were used as metal components in this study. As one of the metal ions (Cu 2+ , Pb 2+ or Cd 2+ ) and one of the proteins (lysozyme or BSA) are present in the solution, the metal removal rate is improved due to the interaction of metal ions with protein, to form a metal-protein complex. At the same time, the lysozyme rejection efficiency decreases, but the BSA rejection efficiency increases. For the mixture consisting of one metal ion and two proteins, the metal removal rate is higher than that for the case (one metal ion + lysozyme), but lower than that for the case (one metal ion + BSA). Meanwhile, the protein retention efficiency decreases, since the interaction between lysozyme and BSA disturbs the retention efficiency of each protein. As three metal ions and two proteins are present in the solution, the ion removal efficiency is significantly improved, and the protein retention efficiency is increased as well, which is due to the fact that there are much more chances for forming metal-protein complexes.
研究领域:
环境科学
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化学工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Yutang Kang,Jiahao Chen,Shasha Feng,Huixian Zhou,Fangqi Zhou,Ze-Xian Low,Zhaoxiang Zhong,Weihong Xing
Particulate matters (PMs) emissions from energy consumption contribute the vast majority of PM pollution, which are typically associated with high temperatures (>300 °C) and are difficult to remove directly at high temperatures. Electrospinning nanofiber membranes have irreplaceable advantages of high removal efficiency and low pressure drop for PMs filtration, however, the efficient filtration of PMs at high temperature is challenging for polymer-based nanofiber membranes because of the poor heat resistance and inflammability. Herein, we design a thermally-oxidized polyacrylonitrile/polyvinylpyrrolidone/SnO 2 (OPAN/PVP/SnO 2 ) nanofiber membrane by performing the thermally induced cyclization and oxidation reaction of PAN/PVP/SnCl 2 nanofiber membrane at 350 °C in air. During the thermal oxidization process, Sn 2+ acted as a catalyst and activation, preventing the melting and fusion of PAN nanofibers. The addition of PVP greatly increased the mechanical properties of OPAN/SnO 2 nanofiber membrane. The prepared OPAN/PVP/SnO 2 nanofiber membrane possesses superior PMs filtration performance at room temperature, with the PM 0.3 and PM 2.5 filtration efficiency of 99.53% and 99.98%, respectively. The OPAN/PVP/SnO 2 nanofiber membrane exhibits high temperature tolerance up to 350 °C and wide pH tolerance of 1–14, it remains a high PMs removal efficiency of 98.51% at 350 °C and 98.67% at 300 °C. Moreover, the OPAN/PVP/SnO 2 nanofiber membrane shows excellent fire retarding and self-extinguishing property not shown in pristine PAN nanofiber membrane. This work provides a novel approach for clean use of energy via a cost-effective, heat-resistant, and flame-retardant nanofiber membrane.
研究领域:
环境科学
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材料科学
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纳米技术
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 105
·103843-103850
·
IF 3.289
Aitang Zhang,Aihua Li,Yao Wang,Mengli Liu,Hongjing Ma,Zhongqian Song,Jingquan Liu
Mesoporous carbon nanoparticles (MCNs) were prepared through a series of annealing procedures using well-controlled diblock copolymer micelles as precursors. The micelles were prepared from poly(acrylonitrile)-block-poly(methylmethacrylate) (PAN-b-PMMA), and synthesized via reversible addition–fragmentation chain transfer (RAFT) polymerization. The RAFT-controlled synthesis of block copolymer, PAN-b-PMMA was conducted either in solution or emulsion conditions. It was found that micelles with well-defined morphology could be directly formed from the emulsion polymerization. The as-synthesized micelles containing hydrophilic PAN corona as the carbon source and hydrophobic PMMA core as the sacrificing template underwent a microphase-separation process to form a nanostructure at 250 °C, followed by carbonization at 800 °C to afford MCNs. What's more, the MCNs based supercapacitor exhibited a good capacitance value of 220 F g−1 and an excellent cycling performance of 91% capacitance retention after 10 000 cycles. The as-prepared MCNs are envisioned to provide broad practical applications in the fields of energy storage and nanotechnology.
研究领域:
材料科学
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纳米科技
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能源存储
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高分子化学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2019
·
IF 2.291
Zhenying Liu,Shuai Ma,Xiao Li,Hu Yang,Zhenliang Xu
New porous carbonaceous materials are anticipated in the energy storage and environmental application. In the present study, a new carbonaceous composite with hierarchically porous structure was prepared from Mg(OH) 2 pre-filled PAN based membrane for the first time. The obtained carbonaceous composite contains 54.1% C, 26.8% O, 6.2% N and 5.6% Mg. Afterwards, the composite was tested as a supercapacitor and dye adsorbent. Its special capacitance reached 278 F/g at the scan rate of 0.5 A/g, and 186 F/g at the scan rate of 50 A/g, which outperforms most of supercapacitors obtained from the same precursor. A good cycling stability (98% in 5000 cycles) and a high power density (about 7000 W/kg) are achieved. As a dye adsorbent, the composite shows a high MO adsorption capacity of 1170 mg/g, much higher that of the active carbons. These results indicate an effective method to prepare new carbonaceous materials or to treat those disfunctional membranes.
研究领域:
材料科学
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能源存储
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2018
·
IF 1.943
Bin Wang,Yue Ma,Bing Na,Ruihua Lv,Hesheng Liu,Weiping Li,Haiying Zhou
Polymer film capacitors with high stability and reliability at elevated temperatures are promising for next-generation power electronic systems and hybrid electric vehicles. In this work, sandwich-structured composite films with good dielectric thermal stability were fabricated based on hybrid membranes of poly(vinylidene fluoride)/polyacrylonitrile blend nanofibrous skeleton highly filled with BaTiO 3 nanoparticles. Composite films with 64.7 vol% BaTiO 3 nanoparticles in the core layer exhibited high permittivity (38.1) and low loss (0.046) at 1 kHz and room temperature, and the dielectric permittivity and loss were only slightly increased to 41.5 and 0.08, respectively, at 120°C. Good dispersion and high loading of BaTiO 3 nanoparticles in the composites films contributed to enhanced dielectric thermal stability and permittivity. Moreover, the composite films showed good flexibility, which could be ascribed to its sandwich-structure. Our work paves a generic way to fabricate flexible composite films with excellent dielectric thermal stability via high loadings of ceramic nanoparticles. POLYM. COMPOS., 39:E1841–E1848, 2018. © 2018 Society of Plastics Engineers
研究领域:
材料科学
·
电气工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Hao Xu,Shuai Liu,Zhiang Li,Fan Ding,Jie Liu,Weimin Wang,Kaikai Song,Ting Liu,Lina Hu
Solid polymer electrolytes (SPEs) have been considered the most promising separators for all-solid-state lithium metal batteries (ASSLMBs) due to their ease of processing and low cost. However, the practical applications of SPEs in ASSLMBs are limited by their low ionic conductivities and mechanical strength. Herein, we developed a three-dimensional (3D) interconnected MXene (Ti 3 C 2 T x ) network and Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) particles synergistically reinforced polyethylene oxide (PEO)-based SPE, where the association of Li + with ether-oxygen in PEO could be significantly weakened through the Lewis acid-base interactions between the electron-absorbing group (Ti–F, −O–) of Ti 3 C 2 T x and Li + . Besides, the TFSI − in lithium salts could be immobilized by hydrogen bonds from the Ti–OH of Ti 3 C 2 T x . The 3D interconnected Ti 3 C 2 T x network not only alleviated the agglomeration of inorganic fillers (LLZTO), but also improved the mechanical strength of composite solid electrolyte (CSE). Consequently, the assembled Li||CSE||Li symmetric battery showed excellent cycling stability at 35 ℃ (stable cycling over 3000 h at 0.1 mA cm −2 , 0.1 mAh cm −2 ) and −2 ℃ (stable cycling over 2500 h at 0.05 mA cm −2 , 0.05 mAh cm −2 ). Impressively, the LiFePO 4 ||CSE||Li battery showed a high discharge capacity of 145.3 mAh/g at 0.3 C after 300 cycles at 35 ℃. This rational structural design provided a new strategy for the preparation of high-performance solid-state electrolytes for lithium metal batteries.
研究领域:
材料科学
·
电化学
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能源存储
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Guofeng Rui,Huilin Fan,Xiangmin Tang,Zian Zhao,Lei Tan,Xiaotong Wu,Yujie Song,Faiza Meharban,Kailong Zhang,Yuanyuan Cui,Chao Lin,Xiaopeng Li
The development of solid-state electrolytes with high ionic conductivity and wide electrochemical window is crucial for the advancement of lithium batteries. In this work, we introduce a polyethylene oxide (PEO)-based electrolyte hybridized with the polyacrylonitrile coated lithiated palygorskite fibers (Li-Pal@PAN) to enhance ionic conductivity and electrochemical stability. First, the Li-Pal@PAN serves as a one-dimensional lithium-ion conduction pathway in the solid-state electrolyte with a low interfacial energy barrier for Li + transfer. Then, it facilitates the formation of a composite solid electrolyte interface (SEI) that contains Li 3 N, effectively mitigating side reactions between the lithium metal anode and the electrolyte. As a result, the Li-Pal@PAN enhances the oxidative stability of the PEO-based electrolyte, increasing its oxidation potential to 4.9 V. Electrochemical characterization further demonstrates that a Li||Li symmetric cell using the PEO/Li-Pal@PAN composite exhibits stable cycling performance over 1000 h at a current density of 0.1 mA cm −2 . Moreover, all-solid-state lithium metal batteries utilizing a high-voltage ternary cathode (LiNi 0.6 Mn 0.2 Co 0.2 O 2 , NCM622) deliver a high-rate capacity of 117 mAh g −1 at 0.3C. These results underscore the significant potential of PEO/Li-Pal@PAN composites in improving the performance, stability, and longevity of all-solid-state Li metal batteries, offering a promising pathway for their application in advanced energy storage system.
研究领域:
材料科学
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电化学
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储能技术
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纳米技术
·
高分子科学
✓ 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）