JOURNAL OF MATERIALS SCIENCE
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2021
·Vol. 56
·期 16
·9702-9711
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IF 4.22
Yang Yongmei,Gao Xinna,Yang Sijun,Shen Yuhua,Xie Anjian
Abstract Fabricate surface-enhanced Raman scattering (SERS) substrate with low cost and high performance through simple method is a challenge and worthy of work. Herein, an excellent Cu 2 O SERS substrate with porous octahedron structure was synthesized by brief calcining Cu-MOFs in Ar, air and H 2 /Ar gas environment at 350 °C successively. The as-obtained octahedral Cu 2 O was utilized as SERS substrate to measure dye molecules and organic pollutants, which exhibited splendid sensitivity for the detection of methylene blue and 4-mercaptopyridine (4-MPY) with the ultralow limit of 5 × 10 –9 M and 5 × 10 –10 M, respectively. The maximum relative standard deviation for detection of 4-MPY is as low as 12.3%, which is less than limiting step in quantitative SERS (15.0%). The above excellent results are due to outstanding synergistic effect of electromagnetic enhancement of oxygen vacancy on the Cu 2 O surface and chemical enhancement of the Cu–S bonds formation. The fabricated Cu 2 O possesses superior sensitivity, selectivity and reproducibility for SERS detection of probe molecules with sulfhydryl groups and may be a prospect candidate in the practical application. Graphical Abstract
An excellent Cu 2 O SERS substrate with porous octahedron structure was synthesized by simple calcining Cu-MOFs in Ar, air and H 2 /Ar gas environment at 350 °C successively. The as-prepared Cu 2 O play significant roles in the enhancement of SERS signals for rich-thiol detection due to outstanding synergistic effect of electromagnetic enhancement of oxygen vacancy on the Cu 2 O surface and chemical enhancement of the Cu-S bonds formation. The detection limit of 4-Mercaptopyridine (4-MPY) can be as low as 5×10 –10 M. The porous octahedral Cu 2 O will have potential applications in SERS detection as the substrate.
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高影响因子
ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Nana He,Lili Li,Jiaqi Chen,Junhao Zhang,Ce Liang
Extraordinary superhydrophobic polycaprolactone (PCL) composite membranes with an alternated hierarchical micro–nano structure were designed by addition of SiO2 aerogel. The highest water contact angle (WCA) of 166.8 ± 1.5° was obtained when SiO2 aerogel content was 0.5% (PCL/SiO2-a0.5) in the PCL composite membrane, which was higher than other reported polymer-based membranes. SiO2 aerogel lowered PCL composite membrane’s surface energy. The triple curvature structure composed of microspheres, nanospheres, and nanofibers produced on PCL/SiO2-a0.5 membranes endowed the excellent roughness of the surface. Also, the inner structure of the PCL/SiO2-a0.5 composite membrane composed of micro–nano spheres, nanofibers, and microfibers increased the porosity of the separation membrane, which would provide more adsorption space. The PCL/SiO2-a0.5 composite membrane as a separator for surfactant-stabilized emulsions of water-in-oil showed ultrahigh separation flux and efficiency. Meanwhile, the PCL/SiO2-a0.5 composite membrane had an outstanding chemical resistance, self-cleaning ability, and good reusability. The composite membranes reported in this work as eco-friendly separation materials possessed all these characters in oil/water separation. This research proposed a very simple method to design eco-friendly high-efficiency separators through the construction of the alternated micro–nano hierarchical structure.
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PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Xiaona Wu,Lei Yang,Fanbin Meng,Wenli Shao,Xiang Liu,Miao Li
The incorporation of functional nanomaterials is a promising technique to enhance or develop novel material properties, such as improvement of permeability and selectivity related to water purification and reuse. Herein, ZIF-8 nanoparticles were used to prepare the thin-film nanocomposite (TFN) membranes via both two-step in situ growth and one-step blending interfacial polymerization (IP) methods. The primary purpose was to investigate specific effects of different preparation methods and ZIF-8 nanoparticles on the structure and properties of TFN membranes. The results show that ZIF-8 nanoparticles increased the negative charge, roughness, and hydrophilicity of the polyamide rejection layer. The effects of one-step blending method on the TFN membrane characteristics were limited as compared to the two-step in situ growth method. The effective incorporation of ZIF-8 nanoparticles into TFN membranes increased the water permeability of TFN-ZIF-0.64 to 20.8 ± 0.62 L·m −2 ·h −1 ·bar −1 and enhanced the Na 2 SO 4 rejection to 94.2 ± 3.4%, which is approximately 1.3 times increase in water permeability and 8.0% rise in rejection than those of TFC membrane. Comparatively, two-step in situ growth ZIF-8-modified TFN membranes displayed ultrahigh rejection of typical anionic dyes, demonstrating superior NF performance.
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高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2021
·Vol. 36
·期 4
·925-937
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IF 3.089
Zhang Shaohu,Niu Xiaoqin,Wang Qi,Li Dan,Zhang Weijie,Chen Yuhong,Ran Fen
Abstract Permeability and selectivity are two important parameters for evaluating membrane separation performance. In this work, the polysaccharide-functionalized gold nanoparticles (DexDTM-AuNP) are synthesized by one-step reduction with NaBH 4 and used as additive for modification of PES membrane to improve the hydrophilicity of the membrane. In comparison with the pristine PES membrane, the water contact angle (WCA) of the DexDTM-AuNP-modified membrane significantly decreases. When the content of DexDTM-AuNP is 3 wt%, the WCA of the modified membrane decreases from 89.3° to 61.1°, indicating excellent hydrophilicity. The modified membrane shows high pure water flux of up to 134.5 L m −2 h −1 , and the rejection ratio for bovine serum albumin, congo red, and methyl blue are 98.8, 99.3, and 93.6%, respectively. DexDTM-AuNP-modified membrane exhibits excellent hydrophilicity, anti-fouling ability, and separation performance. Therefore, the strategy has great potential for practical applications in water purification and other separation fields. Graphic Abstract
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高影响因子
Molecular Catalysis
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2021
·
IF 5.062
Ruixue Wu,Caifeng Bi,Xia Zhang,Jinmiao Wang,Lulu Wang,Chuanbin Fan,Mei Wang,Feng Shao,Nana Li,Ziao Zong,Yuhua Fan
Two novel Co-MOFs constructed from aromatic polycarboxylic acid named {[Co(tib) 2 (bimb) 2 ]·4H 2 O} n (tib = 3-((4-(1H-1,2,4-triazol-1-yl)benzyl)oxy)benzoic acid, bimb = 1,4-bis(imidazole-1-ylmethy) benzene) and {[Co 2 (bipa) 4 (bibp) 6 ]} n (bipa = 2-(4-carboxy-2-nitrophenoxy)-6-nitroterephthalic acid, bibp = 4,4′-bis(imidazolyl) biphenyl), have been synthesized under solvothermal conditions and characterized by single-crystal X-ray diffraction, elemental analysis, IR spectra, powder X-ray diffraction (PXRD), thermogravimetric analysis (TG) as well as electrochemistry. The single-crystal X-ray diffraction analysis indicates that Co-MOF 1 exhibits an uninodal net with a (6 5 ·8) topology, whereas Co-MOF 2 exhibits an uninodal 4-connected framework with a (4 4 ·6 2 ) topology. The electrochemistry studies demonstrate that both of the two Co-MOFs can behave as the efficient electrocatalysts for water oxidation in a mild neutral system at the potential around 1.20 V vs. NHE with comparatively low overpotential ( η ) for Co-MOF 1 and 2 of 337–541 mV vs. NHE. Moreover, the two Co-MOFs also show good photocatalytic degradation capabilities toward MB/MV dyes under UV irradiation, and the mechanism studies demonstrate that the main active species are · OH radicals. Therefore, these bi-functional Co-MOFs materials can be treated as convenient and efficient catalysts for the oxygen evolution reaction and aromatic dyes degradation.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2021
·
IF 6.165
Yan Li,Jian Tang,Yun Liu,Zhongliang Xiao,Yue-Fei Zhang
In this paper, the adsorption properties of polyacrolein (PA-1) for congo red (CR) and acid blue 93 (AB93) dyes were studied. The effects of pH value, temperature, and contact time on the adsorption effect were investigated, and the prepared PA-1 was characterized. In the binary dyes system, PA-1 can significantly adsorb CR, which can be attributed to the hydrogen bonding interaction between PA-1 and CR, matched molecular size and chemical reaction. Additionally, the concentration of these dyes can be adjusted to regulate the selective adsorption of CR by PA-1. According to molecular dynamics (MD) calculations, the affinity of dimer acrolein (DA) with CR is stronger than that of DA with AB93 and the complexes of DA with CR are more stable, which is the reason why PA-1 can selectively absorb CR. Therefore, PA-1 has a promising prospect in the treatment of multicomponent dyes wastewater.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Yi Hao,Yuan Gao,Luyao Gao,Yulian He,Yingying Niu,Sameer Hussain,Ruixia Gao,Lisa D. Pfefferle,M. Shahid,Sicen Wang
A new class of amphiphilic magnetic adsorbents (denoted as Fe 3 O 4 -GPS-A) is fabricated by functionalization of the Fe 3 O 4 surface with six different amphiphilic silanizing agents that are specifically tailor-made to the chemical structure of PAEs. The resulting Fe 3 O 4 -GPS-A exhibit different contact angles due to the significant changes in functional groups, as revealed by 1 H NMR and FTIR spectroscopy. Among six Fe 3 O 4 -GPS-A, Fe 3 O 4 -DOA and Fe 3 O 4 -OAN exhibit a fast adsorption process (within 60 min) and high adsorption capacity for dibutyl phthalate (DBP) and dioctyl phthalate (DOP), two commonly used phthalate esters (173.7 mg g −1 for DOP and 104.4 mg g −1 for DBP), in conjunction with fast magnetic responsiveness and good thermal stability. The adsorption performance of Fe 3 O 4 -DOA and Fe 3 O 4 -OAN were well-maintained even after ten cycles. Besides, the adsorption mechanism was investigated through adsorption fitting models and theoretical calculations, which inferred that the interactions between adsorbent and adsorbate are mainly based on hydrophobic interactions along with secondary non-covalent contacts. Finally, the adsorbents combined with GC–MS analyses were applied to monitor DBP and DOP in the lake water samples. This work not only opens up a strategy for amphiphilic modification of magnetic adsorbents, but also provides a new avenue in their application for phthalate esters detection.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Yue Zhang,Kongyin Zhao,Zhenhao Yang,Zhijian Zhang,Zhilong Guo,Rongrong Chu,Wei Zhang,Wenxiong Shi,Jiacheng Li,Ziyi Li,Haiyi Liu,Anhou Xu,Xi Chen
Calcium alginate (CaAlg) hydrogel has good anti-pollution performance. However, the self-supporting CaAlg hydrogel filtration membrane is difficult to be batch prepared due to its poor mechanical properties. In this paper, polyester (PET) non-woven fabric, polypropylene (PP) non-woven fabric and polyhydroxybutyrate (PHB) nanofibers were used as support layer to prepare CaAlg composite membranes. A series of studies proved that CaAlg-PET membrane showed higher stability and flux, which revealed that PET non-woven fabric was the best carrier among the three fiber carriers to enhance the various properties of hydrogel. Methyl blue (MB) and sodium chloride (NaCl) were used as the representatives of molecules and ions, respectively. The effects of concentration, operating pressure and temperature on the separation performance of MB/NaCl by CaAlg-PET membrane were investigated. The flux of CaAlg-PET membrane was 19.3 L·m −2 ·h −1 ·bar −1 , and the membrane showed a high selectivity of 183.4 to MB/NaCl mixture (99.5% rejection of MB and 8.3% rejection of NaCl). Moreover, Barium ion was used to cross-link sodium alginate to prepare barium alginate (BaAlg) hydrogel coated composite membrane (BaAlg-PET) using PET fiber as the carrier. The BaAlg-PET membrane exhibited higher strength, stability, flux and better separation performance than CaAlg-PET membrane. BaAlg-PET membrane exhibited a high flux of above 35.5 L·m −2 ·h −1 ·bar −1 , and the molecular ion selectivity was 306.3 (99.7% rejection of MB and 8.1% rejection of NaCl). Membrane pore structure and pore size distribution of BaAlg hydrogel membrane were generated by molecular dynamic (MD) simulations. In sum, this work provided a green, economical and expandable new idea and membrane material for the separation of molecules and ions.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Qin Liu,Sheng Xu,Shu Xiong,Ming Yi,Yan Wang
Substrate modification of thin film composite (TFC) membranes by various crosslinkers is generally required for organic solvent nanofiltration (OSN) application, to enhance the membrane stability and solvent resistance, which however leads to the permeance decline. In this contribution, coordination-crosslinked polyimide substrate is developed for the first time, which is different with those covalently-crosslinked substrates, and achieves the enhanced solvent resistance, improved hydrophilicity and optimized porous microstructure simultaneously. The effects of the alkaline coagulation bath, subsequent ion exchange, and further solvent activation are investigated. The resultant TFC membrane breaks through the typical permeability-selectivity trade-off of OSN membranes successfully, exhibiting an astonishingly superior solvent permeance (1.5–2 times the highest data) (65.2 LMH/bar for methanol, 33.1 LMH/bar for ethanol and 59.1 LMH/bar for acetone) to previously reported polymeric-based TFC OSN membranes with a competitive solute rejection (>98% for Rose Bengal). This study is believed to provide a new orientation in the development of the desirable substrate for the high-performance OSN composite membrane and other separation applications.
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高影响因子
Journal of Bionic Engineering
·
2021
·Vol. 18
·期 3
·559-573
·
IF 2.682
Zhang Ruilong,Zhou Zhiping,Wang Yi,Dai Xiaohui,Chen Li,Dai Jiangdong
Mimicry of nature drives the development of bionic materials. Bionic superhydrophobic materials are a kind of high-efficiency materials to handle oil spills and water pollution. However, the stability of surface coatings of the superhydrophobic materials remains a challenge. Herein, a new category of self-assembly bionic superhydrophobic surface coating was prepared via one-step condensation/copolymerization of vinyltriethoxysilane (VTES) and divinylbenzene (DVB), which realized the close combination of covalent bonds between organic ( e.g. DVB) and inorganic matter ( e.g. VTES), and avoided the swelling of polydivinylbenzene (PDVB) in the process of collection of oil from water. This organic-inorganic hybrid polymer could self-assembly deposit on the surface of sponge even other substrates. For example, P(VTES-DVB)-SiO 2 /MS obtained by assembling P(VTES-DVB)-SiO 2 on the surface of Melamine Sponge (MS) exhibited superhydrophobicity with a Water Contact Angle (WCA) of 157.3°, the optimal adsorption capacity of 77 g·g −1 − 136 g·g −1 for diverse oils, and an excellent separation efficiency of 99.3%. Besides, the excellent acid and alkali resistance of P(VTES-DVB)-SiO 2 /MS suggested the potential value in practical oil-water separation. P(VTES-DVB)-SiO 2 showed the outstanding hydrophobic performance by using as coating on different substrates. This work provided a new idea about the stable combination of organic and inorganic matter in the surface modification.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Junkai Gao,Miaomiao Cai,Zeguang Nie,Junwei Zhang,Yan Chen
Wettability and roughness modification of membrane surface are crucial for its utilization in the separation of oil/water mixture and emulsion. However, traditional modification method for membrane had the drawbacks of high cost, complex preparation and low flux. In this study, for the first time, based on tannic acid (TA), Cu 2+ and ethylenediaminetetraacetic acid disodium salt (EDTA-2Na), a novel, facile, and cost-effective interface engineering method for significantly enhancing the flux and separation efficiency of polyvinylidene fluoride (PVDF) microfiltration membrane for oil/water mixture and emulsion was developed via in situ extraction of metal ions. TA and Cu 2+ could form TA-Cu 2+ complex which could deposit on the surface of PVDF microfiltration membrane, and then Cu 2+ was extracted by EDTA-2Na, which not only enhanced the surface roughness and wettability of the membrane, but also reserved the porous structure of the matrix membrane. The resulted membrane possessed superhydrophilicity and underwater superoleophobicity, which showed high membrane fluxes of 8841.94 Lm −2 h −1 bar −1 and 1440 Lm −2 h −1 bar −1 for oil/water mixtures and emulsified oil respectively, and the separation efficiency of TA/EDTA-2Na/PVDF could reach 99.99%. Moreover, the membrane still exhibited excellent stability after long soaking treatment in NaCl solution for 48 h. Thus, in this study, a new strategy for membrane surface modification was developed, which had considerable promise for real application of oily wastewater treatment.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Jiao Meng,Yan Xie,Yi-Hang Gu,Xi Yan,Yan Chen,Xiao-Jing Guo,Wan-Zhong Lang
Novel polyvinylidene fluoride-calcium alginate (PVDF-CaAlg) nanofiltration (NF) membranes were prepared by impregnating electrospun PVDF substrates with sodium alginate solution and crosslinking with CaCl 2 solution. The NF membranes were characterized via field emission scanning electron microscopy (FESEM) equipped with an energy-dispersive spectrometry (EDS), attenuated total reflectance Fourier transform infrared spectra (ATR-FTIR), and X-ray photoelectron spectroscopy (XPS). The results show that the prepared PVDF-CaAlg NF membranes exhibit dual thin-film-composite (TFC) structure and superior surface hydrophilicity. The highest pure water flux can achieve 63.8 L·m −2 ·h −1 ·bar −1 accompanied with a 98.5% rejection rate for methyl blue (MB), which is superior to many polymeric NF membranes. The prepared PVDF-CaAlg NF membranes exhibit much higher rejections for seven typical dyes, and the rejection slightly rises with the increase of impregnating time. In the long-term filtration process, the permeation flux for dye solution remains stable. PVDF-CaAlg NF membranes show good anti-fouling performance to BSA protein and lactobacillus.
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高影响因子
危险品化学品经营许可证（带存储）