SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Kun Xu,Zhijia Zhu,Chunyan Hu,Jian Zheng,Huitao Peng,Baojiang Liu
There is currently plenty of emphasis on measures to handle the water pollution spurred on by the misuse of antibiotics. Given its exceptional degradation accomplishment, periodate (PI), a steady solid oxidant, has promising future applications in the breakdown of antibiotics. In this research, PI was activated with UV/CoFe 2 O 4 (CFO) for the first time in an attempt to eliminate oxytetracycline (OTC). The UV/CFO/PI system eliminated 30 mg∙L -1 OTC with a removal effectiveness of almost 100 % in 12 min (OTC 30 mg∙L -1 , CFO 0.2 g∙L -1 , PI 2 mM, pH 5.5). In addition, the ferromagnetism of the CFO assisted to the system's remarkable cycling achievement, with 85.9 % of the OTC still removed after ten cycles. Various organic contaminants, which include reactive blue KN-R (KN-R), ciprofloxacin (CIP), chlortetracycline (CTC), and levofloxacin (LVX), further demonstrated the UV/CFO/PI system to be useful for degrading. The primary active substances for OTC elimination were revealed and recognized through scavenging experiments and EPR analysis as h + , •IO 4 , •IO 3 , 1 O 2 , •OH, and •O 2 – . Simultaneously, redox cycles of Fe(III)/Fe(II) and Co(III)/Co(II) were also observed by XPS test to hasten OTC deterioration. It appeared that this system may be a green approach for antibiotic elimination by investigating the degradation route of OTC and the influence it has on the surroundings employing FuKui functions, LC-MS, and toxicological analysis software (T.E.S.T.), respectively. Additionally, we observed that the CFO (2 2 2) crystal surface has the best adsorption impact on PI by computing Eads from DFT.
研究领域:
环境科学
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化学工程
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材料科学
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毒理学
✓ 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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2024
·
IF 4.9
Lu Ye,Jun Wei,Changning Ran,Jianjun Zhang,Yue Zhang,Sude Ma
The problem of low charge/discharge efficiency of ceramic/polymer composites is still one of the hot topics in current research on dielectric materials. Here, we demonstrate that the ferroelectric property of ceramic/PVDF-based composites can be modulated by the introduction of linear polymer PI and the use of a spin-coating process. PI inhibits some polarization and partial dipole orientation by interacting with the molecular chains of the amorphous phase of PVDF and BT nanoparticles. As a result, the decrease in crystallinity and loss led to improved dielectric properties and charge/discharge efficiency. The findings demonstrate that the microstructure of PVDF-PI/BT nanocomposite is uniform and dense, with outstanding dielectric characteristics and high charge/discharge efficiency. The permittivities were stabilized in the range of 12.87–17.86 at 100 Hz, and the dielectric losses were all less than 0.27. Compared with the previously reported binary ceramic/polymer composites, the PVDF-PI/BT nanocomposites possessed a high charge/discharge efficiency with a small variation (63%-84%). This work offers an easy and efficient scheme to obtain nanocomposites with outstanding dielectric characteristics and charge/discharge efficiency. It may be a potential candidate for flexible dielectric substrates for advanced flexible capacitive energy storage devices.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
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2024
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IF 1
Qiuyan Bi,Shiai Xu
A positively charged PI/PDA/PEI nanofiltration membrane was prepared in this study by crosslinking between polyethyleneimine (PEI) and poly(dopamine) (PDA) on the polyimide (PI) support membrane for separating Mg 2+ and Li + from MgCl 2 /LiCl mixed solution, and its chemical structure, surface properties, and separation performance were investigated. The results indicate that the PI/PDA/PEI membrane has a thin positively charged layer and shows excellent rejections against many inorganic salts [MgCl 2 (93.1%) > MgSO 4 (86.5%) > Na 2 SO 4 (74.7%) > LiCl (37.6%)]. More importantly, the membrane exhibits long-term stability and good separation of Mg 2+ and Li + , and the Mg/Li ratio of the permeate of brine obtained from West Taijnar salt lake can be reduced from 65.3 to 5.0 at pH 6.5 by filtration.
研究领域:
膜科学
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分离技术
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纳滤技术
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离子分离
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表面改性
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材料科学
✓ 已验证
DOI
高影响因子
TALANTA
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2022
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IF 6.556
Li Zhan,Chengyuan Liu,Keke Qi,Liutian Wu,Ying Xiong,Xuan Zhang,Jianye Zang,Yang Pan
In this work, endogenous metabolites in mouse brain tissue were imaged by negative desorption electrospray ionization (DESI), ammonia assisted DESI (aa-DESI), DESI/post-photoionization (DESI/PI), and ammonia assisted DESI/PI (aa-DESI/PI) mass spectrometry imaging (MSI) strategies. The combined effect of ammonia additive and post-photoionization was found to play an important role in the enhancement of sensitivity and coverage for endogenous analytes under ambient conditions. Compared with DESI, aa-DESI/PI can provide increased signal intensities for metabolites up to 37.1-fold, as well as the imaging of nine more small metabolites ( m/z < 350) (26 for aa-DESI/PI and 17 for DESI) in mouse brain tissue. The results of Pearson correlation analysis and KEGG pathway analysis showed that the enhanced imaging strategy of aa-DESI/PI can facilitate the study of endogenous metabolic pathways and molecular networks. Moreover, the imaging results of mouse tumor tissue demonstrated the promising application of aa-DESI/PI in tumor research.
研究领域:
分析化学
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生物信息学
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分子生物学
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医学影像
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
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2021
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IF 6.901
Xing-Wen Huang,Song-Yi Liao,Yi-Dong Liu,Qiu-Shi Rao,Xiao-Kang Peng,Yong-Gang Min
A novel PEO/CMC-Li @PI hybrid solid polymer electrolyte membrane was designed/assembled by utilizing the polyethylene oxide (PEO) as matrix, the modified N-carboxymethyl chitosan (CMC-Li) as the facilitator to accelerate the transport of lithium ions and the as-prepared polyimide (PI) non-woven fabric as supporting framework. The CMC-Li was firstly synthesized and then combined with PEO and PI non-woven fabric to assemble PEO/CMC-Li@PI membrane using in all solid-state battery (ASSB). The microscopic morphology of the PEO/CMC-Li@PI hybrid membrane was characterized by SEM images. The membranes thermodynamic behaviors were analyzed by the DSC/TG curves, showing that the T m of the PEO/CMC-Li@PI decreased to 46.8 °C. When assembled into all-solid-state battery, the PEO/CMC-Li@PI membrane demonstrated the high ionic conductivities of 3.16 × 10–5 S/cm (30 °C) and 3.15 × 10–4 S/cm (60 °C) calculated from EIS spectra. The electrochemical window of the PEO/CMC-Li@PI cell was measured up to ~5 V at 60 °C. Moreover, the cell with PEO/CMC-Li@PI also delivered excellent electrochemical performances by comparing with other membranes. The high discharge capacities and cycling stability in PEO/CMC-Li@PI cell were assigned to the enhanced ionic conductivity by the added CMC-Li derivative and the improved mechanical properties by the PI non-woven fabric skeleton. The fabrication strategy of the novel PEO/CMC-Li@PI membrane may provide some new design directions for the solid polymer electrolytes in all-solid-state battery.
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
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2020
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IF 8.247
Ming Cai,Ding Yuan,Xiao Zhang,Yi Pu,Xiaofang Liu,Hongwei He,Lixue Zhang,Xin Ning
Here, a novel PVDF-HFP/PI side-by-side bicomponent electrospun separator with cross-linked structure is successfully fabricated for lithium-ion batteries (LIBs). The bicomponent composite fiber not only integrates the excellent characteristics of PVDF-HFP and PI , but also improves the mechanical strength of the electrospun nonwoven and maintains a high level of porosity, up to 85.9 %. Moreover, the PVDF-HFP/PI(T) fibrous separator emerges outstanding performance, including the thermal dimensional stability (up to 200 °C), self-extinguishment, high electrolyte uptake (483.5 %), good ionic conductivity (1.78 × 10 −3 S/cm), wide electrochemical stability window (up to 4.94 V vs. Li + /Li) and favorable interface structure . It is further confirmed by the 3D simulation that the PVDF-HFP/PI(T) nonwoven using as the LIBs separator is beneficial to the homogeneous transmission of lithium ions . As a result, the coin cells with PVDF-HFP/PI(T) separator possess the best first discharge capacity (120.41 mAh g −1 ) and coulombic efficiency (99.36 %) with respect to that of Celgard2320 separator and cross-electrospun PVDF-HFP + PI(T) separator. After 50 cycles, the discharge capacity of Li/PVDF-HFP/PI(T)/LiFePO 4 is found to be retained around 98.13 %, which is higher than 94.91 % of Celgard2320 separator and 96.09 % of cross-electrospun PVDF-HFP + PI(T) separator. Moreover, the coin cell using the PVDF-HFP/PI (T) separator exhibited good discharge capacity under different discharge C-rate at 45 °C, indicating its potential for the high-temperature safety of LIBs. In sum, the PVDF-HFP/PI(T) nonwoven with excellent property has an application prospect in the field of LIBs separator, which also provides a reliable strategy for designing the electrospun separator with improved performance.
研究领域:
材料科学
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能源存储技术
✓ 已验证
DOI
高影响因子
POLYMER
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2024
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IF 4.1
Hongnan Zhang,Taoyuan Liu,Ke Li,Xiaohong Qin
Nowadays, modern industries are rapidly developing, which is caused by a significant amount of high-temperature exhaust gases in the atmosphere, and it contains complex pollutants, formaldehyde, solid particles, and harmful gases that are discharged. For this scenario, the conventional filtering materials are challenged for prevention of high-temperature exhaust gas formaldehyde volatilization because they are composed of metal and inorganic materials caused by oxidation-prone and resilient wear. A recently introduced technique to fabricate composite nanofiber membranes with high strength, modulus, efficiency, low resistance for high-temperature exhaust gas filtering, and its capability to adsorb formaldehyde was discussed in this study. Initially, Polyamide acid (PAA) solution and silicon dioxide (SiO 2 ) nanomicrospheres are used as raw materials for producing electrostatic and thermal imidization Polyimide (PI/SiO 2 ) nanofiber membranes (NFMs) in co-spinning processes. Furthermore, zeoliticimidazolate framework-8 (ZIF-8) was transferred into PI/SiO 2 NFMs and produced the PI/SiO2@ZIF-8 NFM. These findings show that adding SiO 2 nanomicrospheres reduced the fiber packing density as well as air filtration resistance, and PI/SiO2@ZIF-8 NFMs achieve up to 99.703% filtration efficiency and maintain a pressure drop of 178.7 Pa. The weight loss rate is only 4% at temperatures above 300 °C, and the heat resistance is outstanding. Moreover, the PI/SiO2@ZIF-8 NFMs demonstrate a good formaldehyde adsorption performance with a saturation adsorption capacity for formaldehyde within 4 hours of 41.58 mg/g, which is more than 12 times that of the PI/SiO2 NFMs without ZIF-8.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2024
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IF 6.5
Chengyi Si,Liangliang Xiong,Yawen Zhang,Le Li,Hongyu Liu,Xiaoqiang Fan,Minhao Zhu
To facilitate versatile application of polyimide (PI) under harsh conditions, the PI-PDA@PSF@TO coating was successfully developed. The results illustrate the successful formation of PSF@TO microcapsules by encapsulating tung oil (TO) into polysulfone (PSF). After the modification of polydopamine (PDA), PDA@PSF@TO microcapsules exhibit superior dispersion within the coating compared to PSF@TO, resulting in a 16.8 % increase in tensile strength. Moreover, upon coating damage, the released TO can shield the samples in salt environment for a duration of 8 days. In comparison to PI, PI-PDA@PSF@TO coating exhibits a noteworthy decrease of 42.7 % in wear rate. Even after thermal oxidation, there is a noticeable reduction in the friction coefficient from 0.501 to 0.377, accompanied by a decrease in the wear rate from 6.33 × 10 −7 mm 3 N −1 m −1 to 3.31 × 10 −7 mm 3 N −1 m −1 . This improvement contributes to two factors: (I) The PDA@PSF@TO microcapsules, developed by PSF and PDA, achieves the stable storage of TO in PI. (II) The release of TO forms protective layers, which compensate for defects and provide excellent tribological properties, thereby demonstrating the self-lubrication and self-healing characteristics.
研究领域:
材料科学
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涂层
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摩擦学
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高分子科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Baolu Shi,Jia Liu,Jinzhuo Shi,Donghui Guo,Runze Jin,Zihan Zhou,Yu Chen,Baosheng Xu,Ning Zhou
Effectively insulating against excessive heat generated by sunlight while also avoiding harmful ultraviolet (UV) and maintaining suitable levels of visible light transparency is vital for minimizing energy consumption and optimizing sunlight utilization. To address the challenge of photothermal collaborative management, the PI consisted of high fluorinated dianhydride and aliphatic diamine was used to effectively improve the performance of SiO 2 aerogels. The resulting PI-SiO 2 aerogels retain the characteristics of SiO 2 aerogels, such as low density, high transparency between 82∼89 %, and excellent thermal insulation properties with an ultralow thermal conductivity range from 0.023 W/(m.K) to 0.028 W/(m.K). Meanwhile, the coarsened skeleton of aerogels can withstand the extreme temperature difference between −196 ℃ and 200 ℃ without brittle fracture and yellowing. In addition, PI-SiO 2 aerogels exhibit the capability to absorb a significant proportion of UV light within the 200–400 nm, offering distinct advantages in transparent thermal insulation materials. The multifunctional PI-SiO 2 aerogels can be used as candidate materials in the fields of architecture, automobile, electronics, solar energy and aerospace.
研究领域:
材料科学
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纳米技术
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光学工程
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能源效率
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Wang Huan,Fan Yanmiao,Yang Qiaoli,Sun Xiaoyu,Liu Hao,Chen Wei,Aziz Ayesha,Wang Shenqi
Redox activity is an important indicator for evaluating electrochemical biosensors. In this work, we have successfully polymerized indole-5-carboxylic acid into poly-5-carboxyindole nanomaterials (PI-5-CA), using its superior redox activity, and introduced carboxylated single-walled carbon nanotubes (C-SWCNTs) to synthesize a composite material. Finally, a synthesized composite material was used for the modification of the glass carbon electrode to fabricate the PI-5-CA/C-SWCNTs/GCE-based immunosensor and was successfully applied for the sensitive detection of E. coli O157:H7. The fabricated immunosensor exhibited an outstanding electrocatalytic activity toward the detection of E. coli O157:H7 with a remarkably lowest limit of detection (2.5 CFU/ml, LOD = 3 SD/k, n = 3) and has a wide linear range from 2.98×101 to 2.98×107 CFU/ml. Inspired from the excellent results, the fabricated electrode was applied for the detection of bacteria from real samples (water samples) with a good recovery rate (98.13–107.69%) as well as an excellent stability and specificity. Owing to its simple preparation, excellent performance, and detection time within 30 min, our proposed immunosensor will open a new horizon in different fields for the sensitive detection of bacteria from real samples.
研究领域:
生物传感
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材料科学
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ting Sun,Chuanyezi Cai,Jiacheng Guo,Gengqi Tong,Yu He,Xi Chen,Lu Ye,Jianjun Zhang,Sude Ma
As dielectric film as the core device of capacitors, how to enhance its dielectric and energy storage performance is crucial for the application of film capacitors. To this end, we propose a solvothermal synthesis of metal-organic framework (MOF) material UiO-66-NH 2 to explore the potential application of MOF materials in the field of dielectric energy storage. BaTiO 3 nanoparticles and MOF fillers were selected to be introduced into the PVDF/PI matrix, and nanocomposite films were prepared by the spin-coating process, which showed a strong bonding at the micro-interface of the film and a uniform macroscopic thickness without obvious aggregation. The high porosity of UiO-66-NH 2 and the high dielectric constant of BaTiO 3 , as well as the high breakdown strength E b of the polymer matrix are utilised to synergistically promote the energy density and maintain good charge/discharge stability. Notably, the BU-X/PVDF/PI nanocomposite films demonstrated good energy storage performance and stable charge/discharge efficiency η. The results show that the BU-0.5/PVDF/PI nanocomposite film has an E b of 2190 kV/cm, an energy storage density of 3.73 J/cm 3 , and stable η ranging from 60 % to 94 %, which are superior to the pure BaTiO 3 /PVDF/PI nanocomposite film in terms of overall performance. In addition, the dielectric loss of the BU-0.5/PVDF/PI nanocomposite film is as low as 0.022. These findings indicate the good prospects for the development of MOF materials in the field of energy storage.
研究领域:
材料科学
·
介电材料
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能源存储
·
高分子纳米复合材料
·
功能材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chao He,Anze Shui,Liuhai Ni,Jiayi Lou,Juan Ma,Hulei Yu,Sai Xu
Porous materials are widely used for sound attenuation, but achieving broadband absorption remains challenging. Under the guidance of finite element simulations, this study designed and fabricated a gradient porous sound-absorbing material via the air bubble method and freeze-casting technique. The gradient pore structure, constructed via a dual-templating approach using ice crystals and air bubbles, dissipates sound waves in a stepwise manner, thereby enhancing the sound absorption performance of traditional PI aerogels. Subsequently, iron-trimesic metal organic framework (FeBTC), as an acoustic metamaterial, was introduced into foam aerogel through the liquid diffusion method to form a hierarchical sound-absorbing composite structure. The synergistic effect of the hierarchical composite structure significantly improves the sound absorption and insulation performance of foam aerogels. The FF 2 P composite aerogel exhibits an average sound absorption coefficient (ASAC) of 0.82 and an average sound transmission loss (ASTL) of 26.6 dB across the broad frequency range of 500–6300 Hz. Meanwhile, the small-pore layer with ice crystal pores enables composite aerogels to retain excellent thermal insulation performance (0.04 W/m·K). Besides, the introduction of a foam gradient structure enables foamed aerogels to achieve excellent mechanical durability. The successful development of the gradient hierarchical composite aerogel provides a novel approach for designing high-performance, low-cost noise absorbers.
研究领域:
材料科学
·
声学
·
热工学
·
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）