JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Junbin Liao,Jiajie Zhu,Shanshan Yang,Nengxiu Pan,Xinyan Yu,Chao Wang,Jun Li,Jiangnan Shen
Developing highly ion conductive and desirable electrodialysis (ED) performance anion exchange membranes (AEMs) is of great significance. In this work, we report a strategy for fabricating novel AEMs based on a series of fluoro-methyl poly(arylene ether ketone)s having long-side-chain imidazolium groups for ED. Having hydrophilic conductive flexible side-chain imidazolium groups and rigid hydrophobic backbone within AEM matrix, the optimized AEM (PAEK-60-im) shows low water uptake of 24.9% at 80 °C and desirable ion conductivity of 22.01 mS cm –1 at 30 °C. In NaCl removal application of ED, PAEK-60-im shows the NaCl removal ratio of 69.66% within 120 min, outperforming commercial AEM-Type II (68.98%). Accordingly, it has a higher current efficiency of 83.7% but lower energy consumption of 5.9 kWh kg –1 , compared with the commercial one (82.0%; 6.6 kWh kg –1 ). In particular, in selectrodialysis application, possibly owing to the synergistic effect of pore-size sieving effect resulting from macro-separation morphology and hydration energy difference of SO 4 2– ions (–1000 kJ mol –1 ) and Cl – ions (–317 kJ mol –1 ) in feeding solution, PAEK-60-im shows significantly superior monovalent anion perm-selectivity (Cl − /SO 4 2− ) of 7.70 at 30 min, relative to commercial anion-selective Neosepta ACS (5.27) and many other reported mono-valent anion selective AEMs having elegant surface modified layers. The superior ED performance of the homogeneous PAEK-60-im is suggestive of its potential separation application.
研究领域:
材料科学
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化学工程
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电化学
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膜技术
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Tiandu Dong,Zetian Zhang,Hao Liu,Yingjiao Deng,Weixia Liu,Yunxi Li,Yichen Liu,Mingzheng Zhou,Zihan Meng,Haolin Tang
Phosphorylated poly (ethylene- co -vinyl alcohol) (PEVOH) was synthesized and blended with side chain–type sulfonated poly (aryl ether ketone) (SPAEK) to prepare SPAEK proton-exchange membranes with improved physicochemical and electrochemical properties . The results indicate that PEVOH doping helps improve the mechanical properties and proton conductivity of the membranes. The addition of PEVOH not only enhances proton transport but also provides proton transport channels for the membranes at a high temperature and low humidity, leading to excellent fuel cell performance and low ohmic resistance. The interaction between sulfonic acid and phosphonic acid side chain groups leads to the excellent nano-phase separation under microscopic morphology. This forms a large hydrogen bonding network between the acidic and amphoteric groups, which facilitates proton transport at low relative humidities.
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JOURNAL OF POWER SOURCES
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2023
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IF 9.2
Yunji Xie,Kaiqi Wang,Di Liu,Jinhui Pang
Concentrated functionalization of the polymer side chain is widely considered as an effective structural strategy for improving the properties of anion exchange membranes (AEMs). However, the synthetic process typically involves highly toxic reagents. Herein, a series of poly(arylene ether ketone)s with densely benzyl- N -methylpiperidinium-functionalized hexaphenylbenzene pendants is synthesized, avoiding the demand of highly toxic reagents. The fabricated membranes present pronounced microphase separation resulting from the strong contrast in polarity between the hydrophobic polymer backbone and hydrophilic pendants. In contrast to analogous AEMs, the incorporation of bulky and rigid hexaphenylbenzene moieties enlarges the free volume within the membranes, which significantly enhances water absorption and inhibits dimensional change. Moreover, the presence of piperidinium-based cationic groups considerably enhances the alkaline stability of the membranes. One of the prepared membranes with an ion exchange capacity of 1.31 meq g −1 exhibits water uptake, swelling ratio, and hydroxide conductivity of 67.2%, 14.5%, and 49.2 mS cm −1 at 80 °C, respectively. The loss of conductivity is less than 6% after immersion in a 4 M KOH aqueous solution at 30 °C for 480 h. Additionally, a maximum power density of 340.1 mW cm −2 is achieved in the H 2 /O 2 single-cell test, indicating promising application potential for the fabricated membranes.
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ACS Sustainable Chemistry & Engineering
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2023
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IF 8.4
Shuo Yang,Yufeng Cai,Sizhe Tang,Yujie Song,Bing Li,Dongyan Tang,Ming Liu
Radiative cooling provides a low-energy consumption remedy for the urban heat island effect. However, most radiative cooling materials use light-colored surfaces to achieve higher reflectivity, which not only causes light pollution problems but also degrades performance after surface contamination. Here, we through the design of the polymer structure used perylene diimide with coloration ability to prepare the crimson polymer perylene poly(aryl ether) (P-FAPE) by simple condensation reaction and prepared the superhydrophobic film with a porous structure by the method of nonsolvent-induced phase transformation. The polymer film has high near-infrared reflectance, with a maximum reflectance of 93% in the near-infrared region and emissivity reaches 95–98% in the atmospheric transmission window. In three days of outdoor testing, the P-FAPE6 film showed an average temperature drop of 5.72–8.52 °C compared to ambient temperature. Importantly, the water contact angle of the P-FAPE6 film is 160°, and the self-cleaning effect prevents the film surface from dirt contamination or wetting in long-term outdoor use. The P-FAPE6 film also demonstrated long-term stability, a V-0 rating for fire resistance in the UL-94 combustion test, which is promising in applications for cooling building facades, outdoor tents, and vehicle sunshades.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Yuemeng Zou,Luchun Wang,Qiuyi Liu,Yulian Yang,Dandan Wang,Yongqing Tao,Mingyue Wang,Lingling Li,Meng Tian,Junji Wang,Zeng Wen,Xiang Li,Die Gao
Materials with high adsorption properties and high selectivity are ideal adsorbents for the application of adsorption. Herein, by using tetrabrombisphenol A (TBr-BPA) as the template, a novel COF-based composite (SiO 2 @F-COF@MIP) with directional selectivity and three-dimensional spatial selectivity was developed for the first time. Superior selective adsorption effects of TBr-BPA and family-similar compound (tetrachlorbisphenol, TCl-BPA) can be achieved by using composite as the adsorbent. Firstly, to verify the performance of the composite, the selective adsorption effects of F-COF, SiO 2 -NH 2 , SiO 2 -NH 2 @F-COF and SiO 2 @F-COF@MIP on TBr-BPA, TCl-BPA and competing compounds were investigated and compared. Results showed that SiO 2 @F-COF@MIP had extremely high selective adsorption capacities for TBr-BPA and TCl-BPA with the maximal adsorption capacities of 653.2 and 158.8 mg·g −1 , respectively. Secondly, by using computer simulation and experiments analysis, the mechanisms of SiO 2 @F-COF@MIP for the highly selective adsorption were explored. Results revealed the selective adsorption of TBr-BPA on SiO 2 @F-COF@MIP was mainly based on halogen bond interaction, three-dimensional space selectivity effect coupled with hydrogen bond and electrostatic interactions. The selective adsorption of TCl-BPA was mainly based on three-dimensional space selectivity, hydrogen bond and electrostatic interactions. Finally, SiO 2 @F-COF@MIP was used as the adsorbent for the enrichment of TBr-BPA and TCl-BPA in actual water and fish samples, and satisfactory recoveries were obtained, proving that SiO 2 @F-COF@MIP has great application prospect in high selective enrichment.
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Sustainable Materials and Technologies
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2023
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IF 9.6
Jinghan Guo,Yalin Wu,Yanhui Li,Shuangying Li,Zhi Li,Jingwen Niu,Chunmao Chen,Qingxiang Zhou
A creative electrochemical probe utilizing molecularly imprinted modified magnetic carbon dots was designed and fabricated. Carbon dots are a new kind of green, pollution-free, cheap and easy to obtain nanomaterials . The combination of Fe 3 O 4 and carbon dots improved the defect of ferric oxide being easy to aggregate, and their co-modification significantly enhanced the electrochemical activity of the electrode. Cyclic voltammetry and differential pulse voltammetry were executed to evaluate the electrochemical behavior of the co-modified electrode surface and performance of the probe. The constructed probe exhibited excellent selectivity and sensitivity for determining bisphenol AP in plastic products. The introduction of molecularly imprinted polymers endowed the sensor excellent selectivity, ensuring specific recognition of bisphenol AP. The fabricated sensor demonstrated a good two-stage linear range of 0.07–0.3 μM and 0.3–10 μM, and the detection limit was 0.027 μM. The constructed probe was validated to detect bisphenol AP in self-heating hot pot, instant noodle bucket and disposable plastic cup, and satisfactory results were achieved. These results indicated that the fabricated sensor was a cheap, rapid, and selective sensing-platform for detecting bisphenol AP, and could be employed as a reliable routine tool.
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LANGMUIR
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2016
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IF 3.993
Wei Wei,Rongjie Lu,Weitao Ye,Jianhua Sun,Ye Zhu,Jing Luo,Xiaoya Liu
Increasing attention has been paid to fabricate multifunctional stabilizers of liquid marbles for expanding their application. Here, a kind of hydrophobic cyclomatrix polyphosphazene particles (PZAF) were facilely prepared using a one-step precipitation polycondensation of hexachlorocyclotriphosphazene and 4,4′-(hexafluoroisopropylidene)diphenol, and their ability to stabilize liquid marbles was first investigated. The Ag nanoparticle-decorated PZAF particles (Ag/PZAF) were then fabricated by an in situ reduction of silver nitrate onto PZAF particles and used to construct catalytic liquid marbles. The results revealed that the reduction of methylene blue (MB) in aqueous solution by sodium borohydride could be highly efficiently catalyzed in the catalytic liquid marbles, even with a large volume. An excellent cycle use performance of the catalytic liquid marbles without losing catalytic efficiency was also present. The high catalytic activity is mainly attributed to the uniform immobilization of Ag nanoparticles onto PZAF particles and the adsorption behavior of PZAF particles toward MB, which may play an effect on allowing high catalytic surface area and effective accelerating the mass transfer of MB to the Ag catalytic active sites, respectively. Therefore, the combination of Ag nanoparticles with PZAF particles has been demonstrated clearly to be a facile and effective strategy to obtain the functional stabilizer for preparing the catalytic liquid marbles as promising miniature reactors used in heterogeneous catalytic reactions.
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JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Jiafeng Qian,Chenyi Wang,Xiaojing Zhang,Jianxiong Hu,Xiaoyan Zhao,Jian Li,Qiang Ren
Quaternary ammonium-functionalized anion exchange membranes (AEMs) have important potential application value in water electrolysis. In order to further improve the ionic conductivity and stability of AEMs, a series of crosslinked AEMs based on poly (aryl ether sulfone)s (Co-PAES-QA-x-m, “x” represents the functionalized polymer segment, “m” represents the crosslinking ratio) are prepared by introducing dense quaternary ammonium cations on the side chains via Menshutkin reaction. Their polymer structures are characterized by hydrogen nuclear magnetic resonance (1H NMR) and Fourier transform infrared spectroscopy FT-IR, and the microscopic phase separation structure of the obtained membranes is observed by atomic force microscope AFM. The ion exchange capacity (IEC) of Co-PAES-QA-x-m (x = 25%, m = 40%–100%) is between 2.03–2.48 mmol g −1 , and their water uptake (WU), swelling ratio (SR) and ionic conductivity are in the range of 26.9–56.7%, 6.3–12.9% and 53.43–119.43 mS cm −1 at 80 °C, respectively. The test of chemical stability show that the ionic conductivity retention ratio of these AEMs reaches 84.7% after soaking in 2 mol L −1 NaOH solution for 480 h at 80 °C. The water electrolyzer assembled with representative Co-PAES-QA-25-60 reaches 1646.7 mA cm −2 in 2 mol L −1 NaOH solution at 2.0 V and 80 °C, and the durability test shows that its voltage only rises by 5% after 480 h at the current density of 500 mA cm −2 . This work is expected to provide an effective modification method for high-performance AEMs which are used in water electrolyzer.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Lingxin Meng,Mengchi Ju,Jingmei Xu,Xuan Chen,Pengyun Zhao,Jinxuan Lei,Tian Lan,Fenglong Chen,Ziyi Hu,Zhe Wang
In this paper, sulfonated poly(arylene ether ketone sulfone)s containing fluorenyl groups (F-SPAEKS) were synthesized. MIL-101-NH 2 was prepared by hydrothermal reaction . The carboxyl group was modified to MIL-101-NH 2 by amidation reaction, then difunctional MIL-101-NH 2 was designed (MIL-101-NH 2 -COOH). The fillers of MIL-101-NH 2 and difunctional MIL-101-NH 2 -COOH were added into F-SPAEKS matrix to prepare the hybridized membranes, respectively. The structures and morphologies of MIL-101-NH 2 , MIL-101-NH 2 -COOH and hybridized membranes were characterized by SEM, FT-IR, 1 H NMR, XPS and XRD . Among these prepared hybridized membranes, FSMNC-4 (the weight percentage of MIL-101-NH 2 -COOH was 4%) had the highest proton conductivity (159.90 mS cm −1 at 80 °C). The proton conductivity of FSMNC-4 was 1.79 times higher than that of pure F-SPAEKS (89.30 mS cm −1 at 80 °C) and 1.25 times higher than that of FSMN-4 (the weight percentage of MIL-101-NH 2 was 4%) (127.55 mS cm −1 at 80 °C), respectively. Meanwhile, the increase of hydrophilic groups also resulted in the highest water absorption of FSMNC-4 (21.57% at 80 °C). The ionic cross-linked networks reduced the swelling ratio of the hybridized membranes. The swelling ratio of all hybridized membranes was lower than 10%. FSMNC-4 also had good thermal and oxidative stability . The open circuit voltage (OCV) and maximum power density of FSMNC-4 were 0.994 V and 466 mW/cm 2 , respectively. The above results indicated that FSMNC-4 had a promising potential to be applied in PEMFCs.
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Polymers
·
2023
·Vol. 15
·期 15
·3203
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IF 5
Zetian Zhang,Hao Liu,Tiandu Dong,Yingjiao Deng,Yunxi Li,Chuanrui Lu,Wendi Jia,Zihan Meng,Mingzheng Zhou,Haolin Tang
Blend proton exchange membranes (BPEMs) were prepared by blending sulfonated poly(aryl ether nitrile) (SPAEN) with phosphorylated poly(vinylbenzyl chloride) (PPVBC) and named as SPM-x%, where x refers to the proportion of PPVBC to the weight of SPAEN. The chemical complexation interaction between the phosphoric acid and sulfonic acid groups in the PPVBC–SPAEN system resulted in BPEMs with reduced water uptake and enhanced mechanical properties compared to SPAEN proton exchange membranes. Furthermore, the flame retardancy of the PPVBC improved the thermal stability of the BPEMs. Despite a decrease in ion exchange capacity, the proton conductivity of the BPEMs in the through-plane direction was significantly enhanced due to the introduction of phosphoric acid groups, especially in low relative humidity (RH) environments. The measured proton conductivity of SPM-8% was 147, 98, and 28 mS cm−1under 95%, 70%, and 50% RH, respectively, which is higher than that of the unmodified SPAEN membrane and other SPM-x% membranes. Additionally, the morphology and anisotropy of the membrane proton conductivities were analyzed and discussed. Overall, the results indicated that PPVBC doping can effectively enhance the mechanical and electrochemical properties of SPAEN membranes.
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JOURNAL OF CHROMATOGRAPHY A
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2023
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IF 4.1
Xiupei Yang,Maosen Zhang,Jing Yang,Feng Huo,Yingying Li,Lianfang Chen
Bisphenol compounds exist widely in the environment and pose potential hazards to the environment and human health, which has aroused widespread concern. Therefore, there is an urgent need for an efficient and sensitive analytical method to enrich and determine trace bisphenols in environmental samples. In this work, magnetic porous carbon (MPC) was synthesized by one-step pyrolysis combined with a solvothermal method for magnetic solid-phase extraction of bisphenols. The structural properties of MPC were characterized by field emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, and saturation magnetization analysis. Its adsorption properties were evaluated by adsorption kinetics and adsorption isotherm studies. By optimizing the magnetic solid-phase extraction and capillary electrophoresis separation conditions, a capillary electrophoresis separation and detection method for four bisphenols was successfully constructed. The results showed that the detection limits of the proposed method for the four bisphenols were 0.71–1.65 ng/mL, the intra-day and inter-day precisions were 2.27–4.03% and 2.93–4.42%, respectively, and the recoveries were 87.68%-108.0%. In addition, the MPC could be easily recycled and utilized, and even if the magnetic solid-phase extraction was repeated 5 times, the extraction efficiency could still be kept above 75%.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 5
·1-15
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IF 5.7
Xiang Jianxing,Zhou Peipei,Mei He,Liu Xiaodong,Wang Huili,Wang Xuedong,Li Yanyan
Highly efficient nanocomposites, hydrophobic molecularly imprinted magnetic covalent organic frameworks (MI-MCOF), have been farbricated by a facile Schiff-base reaction. The MI-MCOF was based on terephthalaldehyde (TPA) and 1,3,5-tris(4-aminophenyl) benzene (TAPB) as functional monomer and crosslinker, anhydrous acetic acid as catalyst, bisphenol AF as dummy template, and NiFe 2 O 4 as magnetic core. This organic framework significantly reduced the time consumption of conventional imprinted polymerization and avoided the use of traditional initiator and cross-linking agents. The synthesized MI-MCOF exhibited superior magnetic responsivity and affinity, as well as high selectivity and kinetics for bisphenol A (BPA) in water and urine samples. The equilibrium adsorption capacity ( Q e ) of BPA on the MI-MCOF was 50.65 mg g −1 , which was 3–7-fold higher than of its three structural analogues. The imprinting factor of BPA reached up to 3.17, and the selective coefficients of three analogues were all > 2.0, evidencing the excellent selectivity of fabricated nanocomposites to BPA. Based on the MI-MCOF nanocomposites, the magnetic solid-phase extraction (MSPE), combined with HPLC and fluorescence detection (HPLC-FLD), offered superior analytical performance: wide linear range of 0.1–100 μg L −1 , high correlation coefficient of 0.9996, low limit of detection of 0.020 μg L −1 , good recoveries of 83.5–110%, and relative standard deviations (RSDs) of 0.5–5.7% in environmental water, beverage, and human urine samples. Consequently, the MI-MCOF-MSPE/HPLC-FLD method provides a good prospect in selective extraction of BPA from complex matrices while replacing traditional magnetic separation and adsorption materials. Graphical Abstract
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高影响因子
危险品化学品经营许可证（带存储）