MOLECULES
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2022
·Vol. 27
·期 6
·2035
·
IF 4.927
Jiao Jia,Hao Wu,Le Xu,Fengchun Dong,Yongtang Jia,Xi Liu
A nanofiber metal–organic framework filter, a polyacrylonitrile (PAN) nanofiber membrane composite with an iron/2-amino-terephthalic acid-based metal–organic framework (MIL101(Fe)-NH2), was prepared by one-step electrospinning. MIL101(Fe)-NH2was combined into the polymer nanofibers in situ. PAN-MIL101(Fe)-NH2composite nanofiber membranes (NFMs) were prepared from a homogeneous spinning stock containing MIL101(Fe)-NH2prebody fluid and PAN. Crystallization of MIL101(Fe)-NH2and solidification of the polymer occurred simultaneously during electrospinning. The PAN-MIL101(Fe)-NH2composite NFM showed that MIL101(Fe)-NH2was uniformly distributed throughout the nanofiber and was used to adsorb and separate acidic organic ionic dyes from the aqueous solution. The results of Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction analysis showed that MIL101(Fe)-NH2crystals were effectively bonded in the PAN nanofiber matrix, and the crystallinity of MIL101(Fe)-NH2crystals remained good, while the distribution was uniform. Owing to the synergistic effect of PAN and the MIL101(Fe)-NH2crystal, the PAN-MIL101(Fe)-NH2composite NFM showed a fast adsorption rate for acidic ionic dyes. This study provides a reference for the rapid separation and purification of organic ionic dyes from wastewater.Keywords:electrospinning;MIL101(Fe)-NH2;functional nanofibers;water treatment membrane
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Chaohui Liu,Junyuan Xia,Jincui Gu,Wenqin Wang,Qingquan Liu,Luke Yan,Tao Chen
A surge of effort has been devoted to establishing super-wetting membranes with versatility for oily waste water purification. However, persistent challenge remains the lower separation flux. Moreover, the majorities of catalysts are only adsorbed on the surface and easily fall off after multiple cyclic separations. In this work, an effective strategy has been taken to construct a composite membrane consisting of polyacrylic acid functionalized carbon nanotubes (CNTs-PAA) and MIL101(Fe)@platinum nanoparticles (MIL101(Fe)@Pt NPs). The obtained CNTs-PAA/MIL101(Fe)@Pt composite membrane can achieve degradation of dye molecules and at the same time effective separation of oil-in-water emulsions. The separation throughput of this composite membrane can reach up to 11000 L m −2 h -1 bar -1 , which has exceeded most of the previous reported multifunctional separation membranes. Furthermore, this composite membrane has presented stable mechanical property and excellent anti-corrosion ability. This work gives comprehensive consideration to excellent separation performance, versatility and stability, which could have potential applications in practical oily wastewater treatment.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Lizhu Chen,Xueting Xie,Xianliang Song,Shucan Luo,Shengying Ye,Wenbei Situ
To maintain the quality of harvested fruits and vegetables in a closed refrigerated environment, a novel nanocomposite photocatalyst MIL101(Fe)-TiO 2 -rGO (MTR) for ethylene degradation was synthesized. The characterization of MTR was analyzed by X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy, X-ray Photoelectron Spectroscopy (XPS) and High-resolution transmission electron microscope (HRTEM). Moreover, with the good conductivity of rGO, MTR had the smallest band gaps according to ultraviolet–visible solid diffuse reflection (UV–Vis DRS) analysis; this small band gap size improved the utilization of light. According to the results of the photoluminescence spectra and electrochemical impedance spectra, the charge transfer resistance and transient photocurrent of MTR were improved. The redox process of Ti 4+ /Ti 3+ from TiO 2 and Fe 3+ /Fe 2+ from MIL101(Fe) efficiently prevented the recombination of e - -h + pairs. In this cycle, oxidative active substances ( • O 2 − ) were provided, which played a key role in the ethylene degradation of MTR. Additionally, MTR has excellent gas adsorption capacity, and the photocatalytic degradation rate of C 2 H 4 by MTR was 2.07 × 10 -4 min −1 , which is better than that of other photocatalysts. Furthermore, the photocatalytic activity of MTR was still stable after 4 times of recycling, indicating the potential to maintain the quality of horticultural products after harvesting.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Yuxi Liu,Wenjing Zhang,Weimeng Chi,Yuxuan Liu,Ying Chen,Yuning Liang
As a potential Fenton catalyst, Fe-based organic frameworks (Fe-MOFs) severely limit their application in practical heavy pollution due to their slow cycling rate. In this work, a novel photocatalyst (NH 2 -MIL101(Fe, Cu)/WO 3 ) was synthesized using a two-step hydrothermal method. Research on photocatalytic activity revealed that NH 2 -MIL101(Fe, Cu)/WO 3 , when combined with H 2 O 2 , exhibits higher degradation efficiency compared than pure NH 2 -MIL101(Fe, Cu) or WO 3 alone, achieving up to 90 % degradation of levofloxacin (LEV) under visible light irradiation. In addition, the effects of hydrogen peroxide dosage, pH and other factors on degradation performance were studied, and the results demonstrated good stability even after multiple cycles. This excellent photocatalytic performance is attributed to the formation of heterogeneous structures as well as the doping of copper ions. This not only inhibits the electron-hole recombination, but also improves the redox capacity of the catalyst accelerating the regeneration of Fe 3+ . This work offers a way to enhance the photo-Fenton activity of Fe-MOF-based catalysts.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Hanmin Zhong,Xiaoying Ye,Xueting Xie,Xianliang Song,Shucan Luo,Wenbei Situ
With the large surface area and excellent adsorption properties of MIL-101(Fe), MIL-101(Fe)/TiO 2 photocatalysts were prepared by chemical method and physical method in this research, respectively. The photocatalysts' performance on ethylene degradation was evaluated, and the photocatalyst prepared using the chemical method (CH-MT) performed better than that by physical method (PHY-MT) under the same conditions. Moreover, the photocatalysts' molecular structure was characterized by XRD, FTIR, UV–Vis DRS, BET, and XPS. The redox process of Ti 4+ /Ti 3+ of TiO 2 and Fe 3+ /Fe 2+ effectively prevents the complexation of e − -h + pairs. In this cycle, the oxidatively active substance (∙O 2 - ) is provided, which plays a key role in the ethylene degradation of MIL-101(Fe)/TiO 2 photocatalysts. Furthermore, in the BET analysis, CH-MT's specific surface area and pore volume were smaller than PHY-MT's, which improved ethylene absorption, enhanced the transfer of photogenerated carriers, and raised the photocatalytic reaction efficiency of CH-MT. The differences between MIL-101(Fe)/TiO 2 photocatalysts prepared by various methods were investigated and discussed, providing a new approach for MOF materials' application in agricultural areas.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）