ARCHIVES OF MICROBIOLOGY
·
2023
·Vol. 205
·期 7
·1-12
·
IF 2.8
Meng Min,Zhai Zhaochi,Zhang Zhenxing,Kim Jeonghan,Zhu Yongzhe
In this study, the metabolic pathway of the phenylpyrazole insecticide fipronil in Cunninghamella elegans ( C. elegans ) was investigated. Approximately 92% of fipronil was removed within 5 days, and seven metabolites were accumulated simultaneously. The structures of the metabolites were completely or tentatively identified by GC–MS and 1 H, 13 C NMR. To determine the oxidative enzymes involved in metabolism, piperonyl butoxide (PB) and methimazole (MZ) were used, and the kinetic responses of fipronil and its metabolites were determined. PB strongly inhibited fipronil metabolism, while MZ weakly inhibited its metabolism. The results suggest that cytochrome P450 (CYP) and flavin-dependent monooxygenase (FMO) may participate in fipronil metabolism. Integrated metabolic pathways can be inferred from the control and inhibitor experiments. Several novel products from the fungal transformation of fipronil were identified, and similarities between C. elegans transformation and mammalian metabolism of fipronil were compared. Therefore, these results will help to gain insight into the fungal degradation of fipronil and potential applications in fipronil bioremediation. At present, microbial degradation of fipronil is the most promising approach and maintains environmental sustainability. In addition, the ability of C. elegans to mimic mammalian metabolism will assist in illustrating the metabolic fate of fipronil in mammalian hepatocytes and assess its toxicity and potential adverse effects.
研究领域:
环境科学
·
微生物学
·
毒理学
·
生物修复
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
S.Z. Zhang,X.L. Wang,X.H. Xia,Z.J. Yao,Y.J. Xu,D.H. Wang,D. Xie,J.B. Wu,C.D. Gu,J.P. Tu
Interfacial issues have been the main obstacle to the development of solid-state batteries . In this work, we design a solid hybrid polymer electrolyte based on poly-(ethylene glycol) diacrylate and succinonitrile (PSSE) with a liquid state precursor. An intimate interface between PSSE and Li 4 Ti 5 O 12 @vertical graphene (LTO@VG) electrode with three-dimensional array structure is cleverly constructed by infiltrating fluid precursor of PSSE into vertical pores of LTO@VG followed by polymerization and solidification of PSSE. The quasi-solid-state LTO@VG//PSSE//Li and LiFePO 4 //PSSE//LTO@VG full cells exhibit superior electrochemical performance since the active materials are closely contacted by the conductive skeleton and ion-conductive electrolyte. The LTO@VG//PSSE//Li cells maintain 85.7% capacity retention after 400 cycles at 2 C and the LFP//PSSE//LTO@VG full cells still reach 99.0% capacity retention after 200 cycles at 0.5 C. This novel strategy for interface engineering paves the way for achieving high-performance solid-state batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
纳米材料
·
界面科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Lingyue Wang,Xiancheng Wang,Renming Zhan,Zhengxu Chen,Shuibin Tu,Chunhao Li,Xuerui Liu,Zhi Wei Seh,Yongming Sun
The structure and electrochemical performance of lithium (Li) metal degrade quickly owing to its hostless nature and high reactivity, hindering its practical application in rechargeable high energy density batteries. In order to enhance the electrochemical reversibility of metallic Li, we designed a Li/Li2S-poly(acrylonitrile) (LSPAN) composite foil via a facile mechanical kneading approach using metallic Li and sulfurized poly(acrylonitrile) as the raw materials. The uniformly dispersed Li2S-poly(acrylonitrile) (Li2S-PAN) in a metallic Li matrix buffered the volume change on cycling, and its high Li ion conductivity enabled fast Li ion diffusion behavior of the composite electrode. As expected, the LSPAN electrode showed reduced voltage polarization, enhanced rate capability, and prolonged cycle life compared with the pure Li electrode. It exhibited stable cycling for 600 h with a symmetric cell configuration at 1 mA cm–2 and 1 mA h cm–2, far outperforming the pure metallic Li counterpart (400 h). Also, the LiCoO2||LSPAN full cells with a cathode mass loading of ∼16 mg cm–2 worked stably for 100 cycles at 0.5 C with a high capacity retention of 96.5%, while the LiCoO2||Li full cells quickly failed within only 50 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米复合材料
·
锂离子电池
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2022
·
IF 2.216
Peng Xu,Yang Wang,Shasha Wang,Wei Dai,Nannan Chen,Qun Li
In this study, polyethyleneimine (PEI)-modified porous polyacrylonitrile electrospun (PPAN-PEI) nanofibers were successfully prepared and utilized as absorbent for removal of methyl orange from water. Porous polyacrylonitrile (PPAN) nanofibers were firstly generated by electrospinning method using polyvinylpyrrolidone as the pore-making agent. Then PPAN-PEI nanofibers were prepared by combining hydrolysis and amidoximation modification of the PPAN nanofibers. The obtained nanofibers are systematically characterized, and several basic parameters influencing the adsorption-based removal efficiency are researched, including pH of solution, temperature and contact time. The results show that the PPAN-PEI nanofibers with an average diameter of 480 nm and high specific surface area (43.520 m2 g−1) exhibited the high adsorption capacity (726.45 mg g−1 at pH 6) toward methylene orange (MO), and the adsorption isotherms and kinetic data are well fitted by Langmuir and pseudo-second-order kinetic models. Moreover, the adsorption efficiency toward MO by PPAN-PEI nanofibers still retained over 86.7% of its initial adsorption capacity after five adsorption/desorption cycles, which signify that the adsorbents are stable and recyclable. These superiorities make PPAN-PEI nanofibers a promising adsorbent for the removal of dyes.
研究领域:
环境科学
·
材料科学
·
纳米技术
·
化学工程
·
高分子科学
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 82
·期 10
·2098-2113
·
IF 1.638
He Jiaojie,Yang Yue,Xu Yuhong,Wang Zichuan,Xu Bing,Huang Yuheng,Yang Liwei
In this study, an excellent phosphate adsorbent was prepared for removing phosphate to an extremely low concentration. The La(OH) 3 nano-rods stabilizing in polyacrylonitrile (PAN) nanofibers (PLNFs) were prepared by electrospinning and a subsequent in situ precipitation. PAN nanofibers were employed as the matrix of the composite nanofibers, where the well-dispersed La(OH) 3 nano-rods were encapsulated as the active species for highly efficient phosphate capture owing to the strong binding between phosphate and lanthanum. On account of the nano-structure, the maximum phosphate adsorption capacity was 151.98 mg P/g (La), much higher than the result of La(OH) 3 nano-crystal, produced by precipitation without PAN or any organic surfactants. Moreover, the PLNFs could remove phosphate (2 mg P/L) to an extremely low concentration within 20 min, which could lead to a nutrient deficient condition to protect water quality and ecosystem. The optimization of PLNFs design was implemented through parameter adjustment of electrospinning. Lanthanum salt content, humidity, concentration of solution and applied voltage were chosen to analyze the influences on the composition, diameter and morphology of the nanofibers, giving the result that the most effective adsorbent was the PLNFs with spider-web-like nano-structures. The La(OH) 3 nano-rods stabilizing in polyacrylonitrile nanofibers (PLNFs) were prepared by electrospinning and a subsequent in situ precipitation. The maximum phosphate adsorption capacity by PLNFs was 151.98 mg P/g (La). The PLNFs could remove phosphate (2 mg P/L) to an extremely low concentration within 20 min. The PLNFs with spider-web-like nano-structures showed the highest phosphate removal.
研究领域:
环境科学
·
纳米技术
·
材料科学
·
水处理
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Panyue Wen,Qilong Tai,Yuan Hu,Richard K. K. Yuen
Flame retardant polypropylene (PP) was obtained through appropriately blending with microencapsulated ammonium polyphosphate (MAPP) and a novel cyclotriphosphazene-based char-forming agent (CPCFA) and synthesized using a one-pot method in high yield (86.5%). An increase in the limiting oxygen index (LOI) and the observation of a vertical burning (UL-94) V-0 rating as well as the reduction of the heat release rate (HRR) and residual mass of PP/MAPP/CPCFA blends compared to those for PP/MAPP demonstrated the effectivess of a contribution of MAPP and CPCFA to PP in flame PP. Thermogravimetric analyses results demonstrated that the presence of CPCFA improved char formation for PP/MAPP/CPCFA blends in either nitrogen or air atmosphere. Finally, an outstanding water resistance was also obtained for compositions in the weight ratio range of 3:1 to 2:1 (MAPP/CPCFA). After water soaking for 72 h, a UL-94 V-0 rating was still achievable.
研究领域:
高分子材料
·
阻燃化学
·
材料科学
·
热稳定性分析
·
功能材料
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2023
·
IF 9.3
Canhui Ling,Tuoya Naren,Xinsheng Liu,Jixu Yang,Pengfei Xiao,Weifeng Wei,Xiaobo Ji,Gui-Chao Kuang,Libao Chen
s The polymer electrolytes have become widely reported solid electrolytes in high-energy lithium metal batteries . However, this kind of electrolytes are limited by their tradeoff between ionic conductivity and mechanical strength . In addition, polymer electrolytes usually suffer from cracks or breakage due to the rigid structure. Therefore, these drawbacks have greatly influenced their practical applications in lithium metal batteries. Herein, we developed a novel self-healable polymer electrolyte (SHPE) by in-situ polymerizing the mixture of butyl acrylate and 2-ureido-4-pyrimidinone (UPy) with plastic crystal succinonitrile (SN) and lithium bis (trifuoromethanesulfonyl) imide (LiTFSI), which were premixed to behave as deep eutectic solvent (DES) to enhance the ionic conductivity . We found that SHPE displayed 0.46 mS/cm at 30 °C and its electrochemical window was determined to be 4.7 V. While the low dose of UPy could provide quadruple hydrogen bond to endow the polymer electrolyte with good self-healing capability and increase the polymer mechanical strength. Therefore, the symmetrical Li/Li cell using this SHPE showed stable properties as long as 1400 h. The Li/LiFePO 4 cell revealed good capacity retention (93.8%, 140.6 mAh/g) after 300 cycles at 0.2C. This work may provide a promising strategy to develop high-performance polymer electrolytes for lithium metal batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
固态电解质
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Meimei Zhou,Wei Zou,Xuemei Zhu,Huachen Ma,Pengbo Wang,Jiaxin Shang,Pingping Luo
UIO-66-NH 2 was successfully deposited on electrospun polyacrylonitrile (PAN) nanofibers treated by thermal oxidative stabilization (TOS) via a simple and effective in situ growth method. Owing to the formation of acridone rings, naphthyridinering rings and hydronaphthyridine rings during the TOS process, the thermally stabilized electrospun PAN (TSPAN) nanofibers were greatly improved in stability and heat resistance and could provide adequate nucleation points for MOFs growth, indicating an ideal MOFs deposition support without additional surface modifications. The results demonstrated that UIO-66-NH 2 crystals distributed relatively uniform and dense on the TSPAN nanofibers with mass loading up to 28.1 wt%. Compared with powdered UIO-66-NH 2 , the formed UIO-66-NH 2 @TSPAN nanofibers showed enhanced visible light driven photocatalytic activity towards reduction of Cr(VI) due to the improvement of visible light response, more excellent photothermal conversion ability and the increase of exposed active sites. The photocatalytic reduction rate of Cr(VI) over UIO-66-NH 2 @TSPAN was up to 93% within 180 min and the rate constant (k = 0.1362) was 2.3 times that of powdered UIO-66-NH 2 (k = 0.00576). Significantly, the mechanical flexibility and structural stability endowed the nanofibrous photocatalyst easy operation and outstanding reusable capability. The photocatalytic activity for Cr(VI) reduction still preserved 90% after five cycles. This work proposes a facile strategy for preparation of free-standing MOFs nanofibers and provides MOFs-based photocatalysts a new opportunitie for broad applications in water treatment.
研究领域:
材料科学
·
环境催化
·
纳米材料
·
光化学
·
水处理技术
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 131
·期 9
·
IF 1.395
Chang Su,Dezhen Zong,Lihuan Xu,Cheng Zhang
In this article, semi-interpenetrating polymer network (Semi-IPNs) based on nitrile rubber (NBR) and poly(methyl methacrylate- co -butyl acrylate) (P(MMA-BA)) were synthesized. The structure and damping properties of the prepared Semi-IPNs blends were characterized and by fourier transform infrared spectrum (FTIR), dynamic mechanical analysis (DMA), scanning electron microscopy (SEM), thermogravimetric analysis (TGA/DTG), and tensile mechanical properties. The results showed that interpenetrating network based on P(MMA-BA) and NBR was successfully obtained, which showed the improved thermal stability compared to NBR/P(MMA-BA)-based two-roll mill blends. Furthermore, Semi-IPNs showed significantly better the dynamic mechanical properties than that of the two-roll mill system. With the increasing feed ratio of BA and MMA during the preparation of Semi-IPNs, the loss peak position for P(MMA-BA) in NBR/PMMA IPNs shifted to a lower temperature from 20°C to −17°C, and when NBR in Semi-IPNs was accounted for 40 wt %, the dynamic mechanical thermal analysis showed that much more advanced damping material with wider temperature range (−30°C < T < 80°C) as tan δ > 0.45 can be achieved. Therefore, it was expected as a promising way to obtain the excellent damping materials with good oil-resisted properties according the Semi-IPNs system. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40217.
研究领域:
高分子材料科学
·
功能材料
·
复合材料
·
材料物理
·
阻尼材料
·
聚合物改性
✓ 已验证
DOI
高影响因子
NEW CARBON MATERIALS
·
2024
·
IF 6.5
Zhen-Yu Tian,Ya-fei Wang,Xin Qin,Ulugbek Shaislamov,Mirabbos Hojamberdiev,Tong-hui Zheng,Shuo Dong,Xing-hao Zhang,De-bin Kong,Lin-jie Zhi
Silicon anodes are promising for use in lithium-ion batteries. However, their practical application is severely limited by their large volume expansion leading to irreversible material fracture and electrical disconnects. This study proposes a new top-down strategy for preparing microsize porous silicon and introduces polyacrylonitrile (PAN) for a nitrogen-doped carbon coating, which is designed to maintain the internal pore volume and lower the expansion of the anode during lithiation and delithiation. We then explore the effect of temperature on the evolution of the structure of PAN and the electrochemical behavior of the composite electrode. After treatment at 400 -, the PAN coating retains a high nitrogen content of 11.35%, confirming the presence of C―N and C―O bonds that improve the ionic-electronic transport properties. This treatment not only results in a more intact carbon layer structure, but also introduces carbon defects, and produces a material that has remarkable stable cycling even at high rates. When cycled at 4 A g −1 , the anode had a specific capacity of 857.6 mAh g −1 even after 200 cycles, demonstrating great potential for high-capacity energy storage applications.
研究领域:
材料科学
·
储能
·
电化学
·
纳米技术
·
复合材料
✓ 已验证
DOI
高影响因子
PEST MANAGEMENT SCIENCE
·
2024
·
IF 3.8
Liangzhen Shu,Ya Lv,Zhongyin Chen,Yixian Huang,Meng Zhang,Zhichao Jin,Tingting Li,Yonggui Robin Chi
BACKGROUND Potato virus Y (PVY) is a prominent representative of plant viruses. It can inflict severe damage upon Solanaceae plants, leading to global dissemination and substantial economic losses. To discover new antiviral agents, a class of planar chiral thiourea molecules through the key step of N -heterocyclic carbene-catalyzed nitrile formation reaction was synthesized with excellent optical purities for antiviral evaluations against plant virus PVY. RESULTS The absolute configurations of the planar chiral compounds exhibited obvious distinctions in the anti-PVY activities. Notability, compound ( S )- 4u exhibited remarkable curative activities against PVY, with a half maximal effective concentration (EC 50 ) of 349.3 μg mL −1 , which was lower than that of the ningnanmycin (NNM) (EC 50 = 400.8 μg mL −1 ). Additionally, The EC 50 value for the protective effects of ( S )- 4u was 146.2 μg mL −1 , which was superior to that of NNM (276.4 μg mL −1 ). Furthermore, the mechanism-of-action of enantiomers of planar chiral compound 4u was investigated through molecular docking, defensive enzyme activity tests and chlorophyll content tests. CONCLUSION Biological mechanism studies have demonstrated that the configuration of planar chiral target compounds plays a crucial role in the molecular interaction with PVY-CP, enhancing the activity of defense enzymes and affecting chlorophyll content. The current study has provided significant insights into the roles played by planar chiralities in plant protection against viruses. This paves the way for the development of novel green pesticides bearing planar chiralities with excellent optical purities. © 2024 Society of Chemical Industry.
研究领域:
植物病理学
·
有机化学
·
药学
·
生物化学
·
农业科学
✓ 已验证
DOI
PubMed
高影响因子
RARE METALS
·
2022
·Vol. 41
·期 6
·1870-1879
·
IF 6.318
Yang Tian-Qi,Wang Cheng,Zhang Wen-Kui,Xia Yang,Gan Yong-Ping,Huang Hui,He Xin-Ping,Zhang Jun
Substituting liquid electrolytes with solid electrolytes is considered as an important strategy to solve the problem of flammability and explosion for traditional lithium-ion batteries (LIB). However, neither inorganic solid electrolytes (ISE) nor solid polymer electrolytes (SPE) alone can meet the operating requirements for room-temperature (RT) all-solid-state lithium metal batteries (ASSLMB). Here, we report a three-dimensional (3D) nanofiber framework reinforced polyethylene oxide (PEO)-based composite polymer electrolytes (CPE) through constructing a nanofiber framework combining polyacrylonitrile (PAN) and fast Li-ion conductor Li 0.33 La 0.557 TiO 3 (LLTO) framework by electrospinning method. Meanwhile, the PEO electrolyte filled in the pores of the PAN/LLTO nanofiber framework can effectively isolate the direct contact between the chemically active Ti 4+ in LLTO with lithium metal, thereby avoiding the occurrence of interfacial reactions. Enhanced electrochemical stability makes a wide electrochemical window up to 4.8 V with an ionic conductivity of about 9.87 × 10 –5 S·cm −1 at RT. Benefiting from the excellent lithium dendrite growth inhibition ability of 3D PAN/LLTO nanofiber framework, especially when the mass of LLTO reaches twice that of the PAN, Li/Li symmetric cell could cycle stably for 1000 h without a short circuit. In addition, under 30 °C, the LiFePO 4 /Li ASSLMB using such CPE delivers large capacities of 156.2 and 140 mAh·g −1 at 0.2C and 0.5C, respectively. These results provide a new insight for the development of the next generation of safe, high-performance ASSLMBs. Graphical
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
固态离子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）