TALANTA
·
2021
·
IF 6.057
Lizhen Han,Xiaowan Zhang,Dan Li,Mengyuan Li,Peige Qin,Shufang Tian,Youmei Wang,Minghua Lu,Zongwei Cai
As a type of environmental endocrine disrupting chemicals , bisphenols (BPs) have a certain embryonic toxicity and teratogenicity, which can significantly increase the risks of breast cancer, prostate cancer, leukemia and other cancers. In this work, stable multivariate metal-organic frameworks (UiO-66-NH 2 /TCPP x ) were synthesized via in situ one-pot method and used as miniaturized dispersive solid-phase extraction (dμSPE) sorbents for extraction of trace BPs from environmental samples. The phase purity, crystal morphology and physical properties of UiO-66-NH 2 /TCPP x samples were varied by adjusting the mass ratio of TCPP . The extraction performance of UiO-66-NH 2 /TCPP x samples were investigated and UiO-66-NH 2 /TCPP 1.0 exhibited the highest adsorption efficiency. Besides, UiO-66-NH 2 /TCPP 1.0 possessed excellent recycling stability for the adsorption and desorption of BPs more than 20 cycles. The experimental parameters including amount of adsorbent, adsorption time, sample solution pH, temperature, desorption time and desorption solvents which affecting the efficiency of dμSPE were studied, respectively. Good linearity (R 2 > 0.9992) in range of 0.1–200 ng mL −1 was obtained. The detection limits (S/N = 3) and quantification limits (S/N = 10) were achieved at 0.03–0.08 ng mL −1 and 0.1–0.5 ng mL −1 , respectively. The relative standard deviations (RSDs) of intra-day and inter-day ranged from 2.5 to 5.5% and 1.1–6.8%. Enrichment factors were calculated in the range of 303–338. The obtained recoveries of bisphenol F (BPF), bisphenol A (BPA), bisphenol B (BPB) and bisphenol AF (BPAF) were 81.26–91.03% (RSDs = 0.96–6.47%), 82.2–97.27% (RSDs = 0.45–6.15%), 87.56–97.26% (RSDs = 1.1–6.22%) and 82.2–100.8% (RSDs = 0.46–4.07%). The UiO-66-NH 2 /TCPP 1.0 can be employed as potential dμSPE sorbents for the enrichment of trace BPs in the environmental samples.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Wenjing Yuan,Liqin Zhou,Zhaoqiang Zhang,Yunpan Ying,Weidong Fan,Kungang Chai,Ziqi Zhao,Zhongwei Tan,Fang Shen,Hongbing Ji
Highly efficient remediation of bisphenols (BPs) contaminated wastewater by adsorption is intriguing but remains challenging. Herein, we present a starch-grafted-styrene hydrophilic porous resin (SGS-HPR) showing excellent BPs adsorption capacity, through simple graft copolymerization and then external knitting strategy. The typical influencing factors of graft copolymerization and external crosslinking processes were investigated systematically. A series of characterization experiments verified the successful fabrication of SGS-HPR and manifested that the optimum product, SGS-HPR 7 , possesses a hierarchical porous structure with strong hydrophilicity. The abundant presence of starch chain in SGS-HPR 7 , not only increased the hydrophilicity but also enhanced the adsorption affinity, making SGS-HPR 7 exhibit remarkable removal ability toward BPs. The adsorption performance of SGS-HPR 7 was studied systematically in static mode. The results showed that SGS-HPR 7 can adsorb BPs quickly with a stable ability irrespective of the varying aqueous environments. Besides, the continuous adsorption and regeneration experiments were conducted using bisphenol A (BPA) as the model BPs. The adsorbed BPA can be efficiently desorbed by ethanol elution, and the regenerated SGS-HPR 7 showed great recyclability. Interestingly, SGS-HPR 7 also retained the superior adsorption capacity and marvelous regeneration ability in the continuous adsorption experiments. Further, according to theoretical calculation studies, the hydrogen-bonding and π-π stacking interactions involved mechanism was uncovered clearly. Collectively, this work provides a new convenient strategy to fabricate new highly hydrophilic bio-based adsorbent for BPs removal.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Yubin Zhou,Zhongquan Peng,Jingqi Ji,Yancheng Wu,Zhigeng Chen,Haohao Huang,Shumei Liu,Jianqing Zhao
To explore the high performance epoxy resin with high thermal properties and low dielectric constant and loss for copper clad laminates (CCLs), poly(phenylene oxide) (PPO) with low molecular weight is usually used as a modifier. Toward this end, a fluorinated redistributed poly(phenylene oxide) (F-rPPO) with number-average molecular weight of 3.0 ~ 6.2 × 10 3 g/mol was synthesized via the redistribution reaction of commercial PPO with 4,4′-(hexafluoroisopropylidene) diphenol (BPAF) using benzoyl peroxide (BPO) as an initiator. The structure of F-rPPO was characterized by 1 H NMR, 19 F NMR and FT-IR, respectively. F-rPPO was employed in the modification of diglycidyl ether of bisphenol A (DGEBA)/methylhexahydrophthalic anhydride (MeHHPA) epoxy resin, and the effect of F-rPPO on the curing behaviors and resulting thermosets were investigated. The results showed that the cured EP/F-rPPO resins exhibited improved thermal and dielectric properties, as well as lower moisture absorption. At 40 phr F-rPPO (based on DGEBA), the cured EP/F-rPPO resin possessed a higher T g of 146 ℃ and T d5% of 363 ℃ than that of 129 ℃ and 321 ℃ for the pristine epoxy resin, respectively. Moreover, EP/F-rPPO exhibited a lower moisture absorption (0.33%), dielectric constant and loss (2.69 and 0.0132 at 12 GHz) compared to the pristine epoxy resin (0.48%, 2.93 and 0.0303 at 12 GHz, respectively). This work provides an easy and effective solution to fabricate the high performance epoxy resins modified by PPO to better meet the requirement of CCLs.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
·
IF 10.588
Xuan-Yuan Pei,Hong-Yu Ren,Guo-Shuai Liu,Guang-Li Cao,Guo-Jun Xie,De-Feng Xing,Nan-Qi Ren,Bing-Feng Liu
Bisphenols (BPs) are distributed in worldwide as typical environmental hormones, which potentially harm the ecological environment and human health. In this study, four BPs, i.e., bisphenol A, bisphenol F, bisphenol S, and bisphenol AF, were used as prototypes to identify the intrinsic differences in degradation mechanisms correlated with the molecular structures in peroxydisulfate (PDS)-based advanced oxidation processes (AOPs). Electron transfer was the main way of modified biochar to trigger the heterogenous catalysis of PDS, which can cause the degradation of BPs. Phenolic hydroxyl groups on bisphenol pollutants were considered as possible active sites, and the existence of substituents was the main reason for the differentiation in the degradation efficiency of various bisphenols. Results of ecotoxicity prediction showed that most intermediates produced by the degradation of BPs in the β-SB/PDS system, which was dominated by the electron transfer pathway, had a lower toxicity than the parent molecules, while the toxicity of several ring cleavage intermediates was higher. This study presents a simple modification scheme for the conversion of biochar into functional catalysts and provides insights into the mechanism of heterogeneous catalytic degradation mediated by modified biochar as well as the degradation differences of bisphenol pollutants and their potential ecotoxicity.
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2019
·Vol. 26
·期 12
·1-8
·
IF 1.53
Chen Zhaoyu,Wang Zhe,Hou Lei,Wang Chunmei,Du Xinming,Liu Chang,Liu Wenchang,Li Haiqiang,Xu Jingmei
Poly (arylene ether ketone) containing different content of the amino groups (Am-PAEK) polymer membranes were prepared by nucleophilic polycondensation used as gas separation membranes. Am-PAEK was synthesized successfully confirmed by Fourier Transform Infrared (FT-IR). The glass transition temperature (T g ) of Am-PAEK membranes enhanced from 164.83 °C to 192.83 °C, and the XRD results showed that the crystallinity of the Am-PAEK membranes increased as the amino groups content increased. The tensile strength and young’s modulus of the Am-PAEK-10% achieved 44.10 MPa and 2053 MPa, respectively. All of the Am-PAEK membranes exhibited excellent thermal performance. The gas separation capability testing showed that the Am-PAEK-10% membrane showed higher pure gas permeability [P(CO 2 ) = 12.38] as well as ideal permselectivity [α(CO 2 /CH 4 ) = 21.34], the separation performance was closest the Robeson upper bound. It was due to that acid–base and hydrogen bond interactions between the amino groups and carbon dioxide exit in the membranes. Thus, the strategy of precise regulated the content of amino groups of Am-PAEK showed a prospective approach for high performance gas separation membranes.
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高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2019
·Vol. 42
·期 22
·3451-3458
·
IF 2.516
Lili Lian,Xinhao Jiang,Jinyi Lv,Fengkun Bai,Bo Zhu,Dawei Lou
Glucose-derived carbon-decorated magnetic microspheres were synthesized by an easy hydrothermal carbonization method and used as a high-efficiency adsorbent to extract bisphenols in water and tea drinks. The as-prepared carbon-decorated magnetic microspheres had a well-defined core–shell structure with a shell thickness of about 5 nm. The microspheres possessed high saturation magnetization at 60.8 emu/g and excellent chemical stability in aqueous solution. The experimental parameters affecting the extraction efficiency, including extraction time, pH, adsorbent dosage, desorption solvents, desorption time, and solution volume were evaluated. Electrostatic and π–π interactions were the major driving forces during extraction. Overall, a new magnetic solid-phase extraction method of determining bisphenols was developed on the basis of as-prepared magnetic microspheres. The method had a wide linear range, low limits of detection (0.03–0.10 µg/L), and high recoveries (85.4–104.6%).
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 4
·1485-1492
·
IF 3.288
Shuo Li,Huizhong Si,Jianshu Li,Mengtian Jia,Xiaohong Hou
In this study, a metal organic framework/chitosan/polyethylene oxide foam (MOFs/CS/PEO foam) was successfully designed and fabricated, in which polyethylene oxide (PEO) acted as a porogen to increase the adsorption capacity of the MIL-53(Al)/CS foam. The inherent characters, e.g. strength and stability, of the modified foam were also significantly improved. As MIL-53(Al) exhibits the highest adsorption capacity in both computations and experiments among the candidates such as MIL-53(Al), MIL-53(Fe), MIL-101(Cr), MIL-101(Fe), UiO-66(Zr), and MIL-100(Fe), the MIL-53(Al)/CS/PEO foam was chosen as a sorbent to develop a vortex assisted solid phase extraction method for the first time. The efficient method was then successfully applied for the extraction of a trace amount of five bisphenols (bisphenol A, bisphenol B, bisphenol C, bisphenol AF and bisphenol F) in beverages and water with plastic containers, followed by high-performance liquid chromatography-fluorescence detection. A satisfactory result of methodology validation was obtained. Under the optimum conditions, the linear ranges were 0.1–20 μg L−1 with the correlation coefficient (r2) ranging from 0.9943 to 0.9977. The method detection limits were in the range of 0.019–0.065 μg L−1. And the recoveries ranged from 72.68 to 104.6% with relative standard deviations smaller than 9.1%. The proposed hybridization foam was durable and environmentally friendly, since it still maintained adsorption ability after being recycled ten times. The novel method proposed in this work could provide technical support in the fields of environmental protection and food safety.
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高影响因子
POLYMER
·
2019
·
IF 3.771
Shuxiang Ding,Chunxue Wang,Zuosen Shi,Xiaoyu Shi,Zhenzhen Cai,Changming Chen,Zhanchen Cui
A series of fluorinated polycarbonates (AF-3OH-PC MAs) terminated by different proportions of acrylate group were synthesized and directly used as photoresist materials. The materials can directly form a cross-linked film under UV light and initiator conditions without the addition of small molecular crosslinkers. The thermal stability (Td up to 416 °C), the absorption at 1550 nm is almost zero and electro-optical stabilities (after 80 °C for 200 h, the r 33 remains 91% of the initial value) are significantly improved since the small molecular crosslinkers were not added. The propagation and insertion loss of the device were measured by a cut-back method to be only 0.66 dB/cm and 1 dB, respectively. It may be possible to have an enlightening effect on preparing electro-optical switches with better performance.
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高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 2
·1-9
·
IF 5.479
Deng Ze-Hui,Wang Xia,Wang Xiao-Li,Gao Cui-Ling,Dong Liang,Wang Ming-Lin,Zhao Ru-Song
A magnetic covalent organic framework (Fe 3 O 4 @COF) with core–shell structure was fabricated at room temperature and used as an adsorbent for magnetic solid-phase extraction of polar endocrine-disrupting phenols (4-n-nonylphenol, 4-n-octylphenol, bisphenol A and bisphenol AF). The sorbent was characterized by transmission electron microscopy, FTIR, powder X-ray diffraction and other techniques. The main parameters governing the extraction efficiency were optimized. The phenols were quantified by HPLC with fluorometric detection. The method has attractive features such as low limits of detection (0.08–0.21 ng.mL −1 ), wide linear ranges (0.5–1000 ng.mL −1 ), and good repeatability (intra-day: 0.39%–4.99%; inter-day: 1.57%–5.21%). Satisfactory results were obtained when the developed method was applied to determine the four target pollutants in real world drink samples with spiked recoveries over the range of 81.3~118.0%. This indicates that the method is a powerful tool for the enrichment and determination of endocrine-disrupting phenols in drink samples.
A magnetite based covalent organic framework (Fe 3 O 4 @COFs) was synthesized with TPAB, TPA and Fe 3 O 4 . It was used for magnetic solid-phase extraction of endocrine-disrupting phenols from plastic-packaged tea drink samples coupled with liquid chromatography (LC) for determination.
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高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Zong-Da Du,Yuan-Yuan Cui,Cheng-Xiong Yang,Xiu-Ping Yan
Development of functional porous materials for efficient elimination of environmental pollutants is of great importance in green chemistry and environmental protection. Here we report the design, synthesis, and application of a core–shell magnetic amino-functionalized microporous organic network nanosphere (Fe3O4@MON-NH2) for efficient magnetic adsorption of a typical brominated flame-retardant tetrabromobisphenol A (TBBPA) from aqueous solution. By integration of the hydrophobic networks and hydrogen binding sites within MON-NH2, the synthesized core–shell Fe3O4@MON-NH2 nanospheres gave good adsorption for TBBPA. The adsorption equilibrium of TBBPA (50 mg L–1) on Fe3O4@MON-NH2 was achieved within 1 min, showing ultrafast adsorption kinetics of Fe3O4@MON-NH2 for TBBPA. The adsorption of TBBPA on Fe3O4@MON-NH2 followed the pseudo-second-order kinetics and Langmuir adsorption models, giving a maximum adsorption capacity of 135.9 mg g–1 at 25 °C. The adsorption of TBBPA on Fe3O4@MON-NH2 was a spontaneous and endothermic process controlled by positive entropy. Encouraged by the large adsorption capacity, rapid adsorption kinetics, and the small effect of pH (5–10), dissolved organic matter, and ionic strength on the adsorption, the application of Fe3O4@MON-NH2 for TBBPA removal in real water samples was achieved. The used Fe3O4@MON-NH2 can be easily regenerated and reused at least four times without significant reduction of the adsorption capacity. These results revealed the potential of Fe3O4@MON-NH2 for adsorption and removal of environmental pollutants from aqueous solution.
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Polymers
·
2019
·Vol. 11
·期 3
·555
·
IF 3.164
Zhi Geng,Xinyu Wang,Hongchuan Jiang,Leilei Zhang,Zhiting Chen,Yong Feng,Wenzhe Geng,Xia Yang,Mingxin Huo,Jing Sun
A series of novel self-cleaning hybrid photocatalytic ultrafiltration (UF) membranes were fabricated to separate polyacrylamide, which is widely used as a commercial flocculant. To maximize the self-cleaning and anti-fouling properties of hybrid membranes, high surface area TiO2nanotubes (TNTs) with excellent photocatalytic activity were homogeneously introduced into a poly(aryl ether sulfone) matrix by chemical bonds. The chemical structure, micromorphology, hydrophilicity, separation efficiency, fouling behavior, and self-cleaning property of the prepared hybrid membranes were well characterized and evaluated. For the optimal sample, the flux recovery ratio increased from ~40% to ~80% after simulated sunlight irradiation for 20 min, which was attributable to the homogeneous dispersion and efficient photocatalytic degradation ability of TNTs. Furthermore, the intelligent fabrication strategy enhanced the anti-aging ability of the hybrid membranes via the use of a fluorine-containing poly matrix. This work provided new insight into the fabrication of high-performance self-cleaning inorganic/organic hybrid membranes.Keywords:poly(aryl ether sulfone);self-cleaning;ultrafiltration;photocatalytic;titanium dioxide nanotubes
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Jiafei Liu,Xiaoming Yan,Li Gao,Lei Hu,Xuemei Wu,Yan Dai,Xuehua Ruan,Gaohong He
To achieve a better performance of anion exchange membranes (AEMs), AEMs of a unique structure with flexible and dense side chains are prepared by taking amino groups on poly (aryl ether ketone)s (PAEKs) as reaction sites and grafting four long side chains on each repeat unit of main chains. This chemical synthetic route for the unique structure is simple and controllable, with no obvious side reactions happening during synthetic process. Three different kinds of cycloaminium cations are used as functional groups. The AEMs with this unique structure exhibit limited swelling ratios and improved hydroxide conductivities, of which the highest attains 74.4 mS cm −1 at 80 °C when using N-Methylmorpholine (Mm) as the cation group. The high conductivities are due to the formation of connective ion conducting channels facilitated by this kind of structure inside the membranes. No obvious changes in chemical structures of AEMs with different cations happen after alkali treatment for 768 h at 60 °C, indicating a good alkaline stability of AEMs with such specific structure. Moreover, the PAEK-MmOH yields a maximum power density of 302 mW cm −2 at 640 mA cm −2 when operating in a single fuel cell. Overall, these long-branched and densely functionalized AEMs with cycloaminium cation groups possess good application prospects in fuel cells.
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危险品化学品经营许可证（带存储）