WATER AIR AND SOIL POLLUTION
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2024
·Vol. 235
·期 3
·1-14
·
IF 3.8
Zhang Kaibin,Liu Xiaocong,Wang Yi,Yang Guo,Zhu Ying,Jiang Caiyi,Pan Zhicheng,Liu Xiaonan,Xing Bo
In this study, novel nitrogen-doped mesoporous carbon was prepared using solvent evaporation self-assembly method and used to activate persulfate for sulfamethoxazole (SMZ) degradation. The physicochemical properties of the materials were characterized using a variety of characterization techniques (XRD, SEM, Raman, XPS, FTIR). SEM and BET results showed that the catalysts had an obvious pore structure and large specific surface area, which increased with the increase of nitrogen content. XPS results revealed that nitrogen doping could increase the content of graphite-N in mesoporous carbon (from 0.4 to 3.28%), which was the main reason for the excellent catalytic performance of the catalyst. SMZ (20 mg/L) could be effectively degraded by 81.4% within 60 min under the optimal conditions of 200 mg/L of catalyst dosage, 2.0g/L of PS dosage, and initial pH of 6. Mechanistic study demonstrated that both radical and non-radical reactive species play crucial roles in SMZ degradation and deep mineralization to CO 2 and H 2 O through the combination of SO 4 •− , HO•, and 1 O 2 . This research offers valuable insights for investigations into the relationship between active sites and catalytic performance in N-doped mesoporous carbon-activated persulfate degradation of organic pollutants.
研究领域:
环境科学
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催化材料
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污染控制
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DOI
高影响因子
CRYSTENGCOMM
·
2016
·Vol. 18
·期 40
·7805-7813
·
IF 3.849
Xiu Liang,Xiao-Juan Zhang,Ting-Ting You,Guang-Sheng Wang,Peng-Gang Yin,Lin Guo
A new, feasible, and highly efficient platform was developed using self-assembly of (3-aminopropyl) diethoxymethylsilane (ATES) to create metallic oxide-based noble metal nanoparticle hybrid materials. The ex situ approach for fabricating 1D MoO3-nanowires (MoO3-NWs) or ZnO-nanorods (ZnO-NRs) @Au-nanoparticles (Au-NPs) hybrid surface-enhanced Raman scattering (SERS) substrates not only provides a simple route for the decoration of noble metal nanoparticle on metallic oxide nanomaterials, but also realizes the controllable assembly/co-assembly of pre-synthesized nanoparticles with distinctively different sizes, compositions, shapes, and properties. Control over the self-assembly synthesis for morphology and SERS activity was demonstrated by several parameters: (i) coupling agent of ATES, (ii) ATES content, (iii) Au-NPs content, (iv) Au-NP sizes, and (v) other metallic oxide such as ZnO-NRs. The finite difference time domain (FDTD) method was employed to visualize the enhancement mechanism distribution of the hybrid substrate. Furthermore, the optimized MoO3-NW@Au-NPs SERS substrate manifests high SERS sensitivity to melamine with a limit of detection (LOD) of 0.1 ppb (0.08 nM) and excellent uniformity (RSD = 9.26%). The LOD was much lower than the maximal residue limit (MRL) of 2.5 ppm in food prescribed by the US Food and Drug Administration (FDA).
研究领域:
纳米材料科学
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分析化学
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食品安全检测
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DOI
高影响因子
POLYMER
·
2019
·
IF 3.771
Xianyun Gong,Yuyan Liu,Youshan Wang,Zhimin Xie,Qingliang Dong,Mengyao Dong,Hu Liu,Qian Shao,Na Lu,Vignesh Murugadoss,Tao Ding,Zhanhu Guo
Dopamine modified aramid fiber (AF) surface was grafted with amino functionalized graphene oxide to improve the interfacial adhesive performance. The self-polymerized polydopamine (PDA) coating and subsequent amino GO grafting on the AF surface attributed to the increase in its surface roughness and surface-active groups. The functional groups, chemical composition and surface topography of unmodified and modified AF was investigated by Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and Scanning electron microscopy (SEM). The interfacial properties were analyzed by measuring interfacial shear strength (IFSS) of unmodified and modified AF embedded epoxy matrix. Further, the properties were tuned by optimizing the reaction temperature and concentration of ethylenediamine. The IFSS of AF/epoxy composites was increased by 34% after grafting amino graphene oxide.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Current Pharmaceutical Analysis
·
2024
·Vol. 20
·期 7
·607-616
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IF 0.7
Chenxu Feng,Zhangjie Ban,Jianfeng Huang,Yong Zhang,Zhengyu Cai,Lizhai Pei
BackgroundConsiderable interest has been devoted to electrochemical sensors for the detection of L-cysteine using BiPr-based oxide-modified electrodes due to high specific surface area and good electro-catalytic activity with several oxidation states. The combination of the BiPr composite oxide nanowires with polyaniline (PAn) can promote the electro-catalytic performance towards L-cysteine because PAn can facilitate the electro-catalytic process by enhancing the charge transfer.MethodsPAn/BiPr composite oxide nanowires were obtained via low temperature one-step hydrothermal route. The obtained composite oxide nanowires were analyzed by X-ray diffraction, electron microscopy, and electrochemical methods.ResultsCharacterization results indicate that amorphous PAn nanoparticles with a size of about 50 nm are homogeneously dispersed at the surface of the BiPr composite oxide nanowires. PAn/BiPr composite oxide nanowire-modified electrode shows an enhanced L-cysteine electro-catalytic activity. PAn promotes electro-catalytic activity of the BiPr composite oxide nanowires. A pair of quasi-reversible cyclic voltammetry (CV) peaks exist at +0.49 V, -0.19 V, respectively. PAn/BiPr composite oxide nanowire modified electrode possesses a linear response in L-cysteine concentration of 0.001-2 mM and detection limit of 0.095 μM, good repeatability, and stability.ConclusionPAn/BiPr composite oxide nanowires act as effective electro-catalysts for L-cysteine oxidation resulting in the enhancement of the electro-catalytic activity relative to BiPr composite oxide nanowires.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
·
IF 10.319
Wenqiang Hu,Wenbin Fu,Samik Jhulki,Liang Chen,Aashray Narla,Zhijian Sun,Fujia Wang,Alexandre Magasinski,Gleb Yushin
Poor heat/flame-resistance of polyolefin (e.g., polyethylene and polypropylene) separators and high flammability of organic electrolytes used in today's lithium-ion batteries (LIBs) may trigger rare yet potentially catastrophic safety issues. Here, we mitigate this challenge by developing a heat-resistant and flame-retardant porous composite membrane composed of polyetherimide (PEI) and Al 2 O 3 nanowires (NWs). The membranes are fabricated based on an industrially scalable non-solvent-induced phase separation process, which results in an intimately interconnected porous network of Al 2 O 3 NWs and PEI . The produced composite membranes exhibit excellent flexibility, thermal stability, and flame-retardancy. Importantly, the composite membranes exhibit minimal thermal shrinkage and superior tensile strength (16 MPa) at temperatures as high as 200 °C, significantly exceeding the performance of conventional polyolefin separators. Compared with commercial separators, their superior wettability and higher ionic conductivity (by up to 2.4 times) when filled with the same electrolyte, larger electrolyte uptake (∼190 wt.%), as well as improved cycle and rate performance demonstrated in LiNiMnCoO 2 (NCM)-based LIBs make them attractive choices for a variety of electrochemical energy storage devices.
研究领域:
材料科学
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电化学
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能源存储
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高分子科学
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纳米技术
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DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 79
·75359-75364
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IF 3.289
Chunmei Li,Furen Zhang
A series of pyrrolo[2,3,4-kl]acridin-1-one derivatives were successfully synthesized from facile materials (enaminone and isatin) using a reusable solid acid as catalyst in water. A variety of structurally diverse enaminones and various isatins bearing different functional groups tolerated the reaction and gave the corresponding goal products with good to excellent yields. Advantages of this strategy include the mild conditions, operational simplicity, being convenient and environmentally benign, and the reusability of the heterogeneous catalyst. A mechanism was proposed to explain the formation of different substituted pyrrolo[2,3,4-kl]acridin-1-one derivatives.
研究领域:
有机化学
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药物化学
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绿色化学
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杂环合成
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催化化学
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DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 9
·4604-4609
·
IF 2.936
Lei Lü,Hongming Lou,Yinglin Xiao,Guangzhao Zhang,Chaoyang Wang,Yonghong Deng
Triblock copolymer polydopamine-polyacrylic-polyoxyethylene (PDA-PAA-PEO) with excellent performance as a binder for silicon anodes was synthesized. Its structure was confirmed by 1H-NMR, FTIR and UV-vis spectroscopy. Results of electrochemical measurements indicated that a silicon anode based on PDA-PAA-PEO binder exhibited excellent cycle performance with a reversible capacity of 1597 mA h g−1 after 200 cycles at a current density of 0.5 C, much better than that of an electrode based on a polyvinylidene-fluoride binder. Improvement of the cycle performance and reversible capacity for silicon anodes could be attributed to the strong adhesive and high ion conductivity of PDA-PAA-PEO.
研究领域:
材料科学
·
电化学
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能源存储
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高分子化学
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纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2020
·
IF 5.065
Jianwei Bai,Xiaofei Ma,Cen Gong,Yiming Chen,Huijun Yan,Kewei Wang,Jun Wang
Traditional adsorption resin prepared by a low efficiency method has a low porosity and surface area , which limits the adsorption performance of the resin. Therefore, a novel porous resin was developed by structural design of the resins through post- modification with HPA and a post-crosslinked method. The novel porous post-modification resin was successfully prepared by the multistep method. Meanwhile, the high surface area and abundant micropores in HCR-AO can improve the adsorption rate by accelerating the diffusion of uranium in the external diffusion stage. The removal capacity of HCR-AO increased 366% for HCR and 120% for PSD-AO at the same initial concentration. HCR-AO takes less time to reach equilibrium than PSD-AO and HCR. Excitingly, the adsorption amount of the material dropped only slightly even after 8 cycles. The short equilibrium time and outstanding removal efficiency makes it a novel candidate for further extraction of U (VI) from seawater .
研究领域:
环境化学
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核化学
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材料科学
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吸附分离
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海洋资源提取
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2017
·
IF 3.091
Shoutao Ma,Qiang Yu,Yafei Hou,Jinfang Li,Yuan Li,Zhanhua Ma,Lanyi Sun
Coal tar is a byproduct of low temperature coal carbonization. The separation of the compounds has great significance since its main component is the mixture of phenols and hydrocarbons. In this paper, the separation of specific phenolic compounds from model coal tar (phenols + hexane) was studied. The solvent was screened by empirical analysis, the universal quasichemical functional group activity coefficient (UNIFAC), and conductor-like screening model COSMO-SAC (segment activity coefficient). COSMO-SAC was used to calculate the capacity, selectivity, and performance index of solvents. Finally, the monoethanolamine (MEA) was selected as the solvent to extract the phenols. The liquid–liquid equilibrium for the ternary mixture of phenols + hexane + MEA was measured at 303.15 K and 323.15 K under atmospheric pressure, and the results showed that MEA provided a high distribution coefficient, efficiency, and selectivity for phenols. Meanwhile, the extraction process of phenols was simulated based on the nonrandom two-liquid (NRTL) model, for which binary interaction parameters were obtained through calculations of phase equilibrium. The results showed that the purity of phenols can achieve more than 99.5 wt % using MEA as a solvent.
研究领域:
化学工程
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分离科学
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热力学
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燃料化学
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环境化工
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DOI
高影响因子
JOURNAL OF POWER SOURCES
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2020
·
IF 8.247
Fei Li,Ying Wang,Ri-Sheng Bai,Xiao-Xue Wang,Ma-Lin Li,Ji-Jing Xu
The issue of cathode passivation during cycling resulting in rapid capacity fading and premature battery death is a major challenge that hinders the applications of lithium–oxygen (Li–O 2 ) batteries. Here, a facile strategy of introducing a functional separator based on flexible amination SiO 2 /TiO 2 inorganic woven film (STON WF) is proposed to suppress the cathode passivation problem. The by-products, i.e. HCOOLi, CH 3 COOLi and Li 2 CO 3 can be selectively adsorbed on the STON WF separator preferably compared with the cathode and further proved by the density functional theory (DFT) calculations. Thus, benefiting from the separator, the Li–O 2 cells with super P carbon and catalyst-free cathode show enhanced electrochemical performance (5645 mA h g −1 at a current density of 200 mA g −1 ), good rate capability (discharge voltage of 2.43 V at a current density of 1.5 A g −1 ) and especially superior cycle stability up to 268 cycles. These findings present a promising approach to prevent the premature battery death.
研究领域:
电化学
·
能源材料
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纳米材料
·
表面化学
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电池技术
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Xi Quan Cheng,Zhen Xing Wang,Jing Guo,Jun Ma,Lu Shao
Multifunctional coatings derived from bioinspired dopamine (DA) have attracted a lot of attention for water environmental remediation recently. Nevertheless, the high cost of DA monomers seriously hampers their broad application. Herein, an elegant multifunctional coating, which could be deployed as a selective adsorbent or loose nanofiltration membrane for removing of dyes and antibiotics from water, was designed based on the Michael-addition and Schiff-base reactions between cost-effective plant-derived gallic acid (GA) and branched polyethylenimine (PEI) at room temperature. Aside from the extremely low cost of GA (about 5% of that of DA), the resultant GA/PEI coatings possessed much better performance than DA/PEI coatings. When deployed as a dye adsorbent, the bioinspired GA/PEI coatings exhibited much higher selectivity, showing 40% increase in anionic dye adsorptive capability and 30% decline in cationic dye adsorptive capability compared with DA/PEI coatings. When applied as a nanofiltration membrane to separate antibiotic solutions, the multifunctional coatings demonstrated solution flux as high as 41.3 L m–2 h–1 at 5 bar alongside 96.2% azithromycin (AH) rejection, showing a 20% increase in flux and 10% increase in rejection compared with DA/PEI nanofiltration membranes. Therefore, our cost-effective multifunctional GA/PEI coatings show promise for use in sustainable water remediation applications.
研究领域:
环境科学
·
材料科学
·
水处理技术
·
可持续发展
·
表面化学
·
功能材料
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Zhuan-nian Liu,A.-ping Fan,Xiao-gang Han,Habiba Shapour,Qing-yun Zhang
The chelating adsorbent PEI-MIL-101(Cr) was prepared by introducing polyethyleneimine (PEI) into the MIL-101(Cr) channel in this paper. X-ray diffractometer, Fourier transform infrared spectrometer and scanning electron microscope were applied to characterize the structure and morphology of MIL-101(Cr) and PEI-MIL-101(Cr). The adsorption properties and mechanism of the MIL-101(Cr) and PEI-MIL-101(Cr) to Cr(VI) were studied. The results showed that adsorption capacity of PEI-MIL-101(Cr) for Cr(VI) was obviously better than MIL-101(Cr). The adsorption isotherm of Cr(VI) onto MIL-101(Cr) and PEI-MIL-101(Cr) can be described by Langmuir model. The maximum adsorption amount for Cr(VI) onto MIL-101(Cr) and 30% PEI-MIL-101(Cr) was 61.99 and 40.34 mg/g. The adsorption kinetic data of the two adsorbents followed the pseudo second-order model. The negative values ΔH and ΔG illustrate that the process is spontaneous and exothermic. PEI-MIL-101(Cr) can be reused for four times.
研究领域:
环境化学
·
材料科学
·
污染控制
·
吸附技术
·
功能材料
·
水污染治理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）