Implanting polyethylene glycol into MIL-101(Cr) as hydrophobic barrier for enhancing toluene adsorption under highly humid environment

Wang, Jiaxing; Muhammad, Yaseen; Gao, Zhu; Shah, Syed Jalil; Nie, Shuangxi; Kuang, Lihan; Zhao, Zhongxing; Qiao, Zhiwei; Zhao, Zhenxia

doi:10.1016/j.cej.2020.126562

Cited by 63 publications

(41 citation statements)

References 63 publications

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“…In order to illustrate the change of the structural properties of AuNPs@MIL-101 (Cr) after encapsulation of AuNPs, the N 2 ad/desorption isotherms and pore size distributions of MIL-101 (Cr), as well as AuNPs@MIL-101 (Cr) are compared in Figures 1B,C . It could be seen that both samples were featured in Type-I isotherms ( Zhu et al, 2017 ; Wang et al, 2021 ). Compared to MIL-101 (Cr), the N 2 adsorption isotherms of AuNPs@MIL-101 (Cr) decreased significantly, indicative of a reduced specific surface area due to the encapsulation of AuNPs.…”

Section: Resultsmentioning

confidence: 95%

“…Supplementary Figure S2A shows an N 2 adsorption/desorption isotherm and the aperture structure of the pristine MIL-101 (Cr). The isotherm was type-I in nature ( Zhu et al, 2017 ; Wang et al, 2021 ). In the range of P/P 0 = 0–0.1, the adsorption capacity of the material for N 2 increased rapidly, suggesting a typical microporous structure ( Zhang et al, 2015 ).…”

Section: Resultsmentioning

confidence: 99%

“…To assist the understanding of the mechanism of Raman enhancement on AuNPs@MIL-101 (Cr), the toluene adsorption isotherms of MIL-101 (Cr) and AuNPs@MIL-101 (Cr) at 298 K were determined, as shown in Figure 1D and Supplementary Figure S3 . Supplementary Figure S3 shows that the toluene adsorption isotherms of both samples were type-I in the range of P/P 0 = 1.0 × 10 −5 —1.0, indicating a typical microporous adsorption process ( Wang et al, 2021 ). It could be seen that MIL-101 (Cr) had a high saturated adsorption capacity for toluene (12.8 mmol/g).…”

Section: Resultsmentioning

confidence: 99%

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AuNPs@MIL-101 (Cr) as a SERS-Active Substrate for Sensitive Detection of VOCs

Xie

Wang

et al. 2022

Front. Bioeng. Biotechnol.

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Surface-enhanced Raman scattering (SERS) is an important and powerful analytical technique in chemical and biochemical analyses. Metal–organic frameworks (MOFs) can effectively capture volatile organic compounds (VOCs) with high adsorption capacity and fast kinetics, and the local surface plasmon resonance characteristics of gold nanoparticles can quickly and effectively distinguish different VOCs by SERS. Combining both, we designed a novel SERS substrate based on embedding gold nanoparticles (AuNPs) within MIL-101(Cr) for the recognition of various VOCs in the gaseous phase. Occupying of AuNPs inside MIL-101(Cr) increased the micropore-specific surface area of AuNPs@MIL-101(Cr), which enabled AuNPs@MIL-101(Cr) to absorb more toluene molecules and consequently realized its high detection sensitivity. The detection limits for toluene, 4-ethylbenzaldehyde, and formaldehyde were down to 6, 5, and 75, ppm respectively. Moreover, this substrate could be used for detecting different VOCs simultaneously. Finally, we discussed the enhancement of AuNPs outside and inside MIL-101(Cr) on the Raman signal.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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AuNPs@MIL-101 (Cr) as a SERS-Active Substrate for Sensitive Detection of VOCs

Xie

Wang

et al. 2022

Front. Bioeng. Biotechnol.

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“…Amongst MOFs, MIL-101(Cr) has been extensively studied in the fields of carbon dioxide capture, treatment of harmful components, and catalytic reactions [ 20 , 21 , 22 , 23 ] due to its high surface area, large pore volume, good hydrophilicity and chemical stability. In addition, the specific pore size (1.2 and 1.6 nm) and high porosity (0.83) enable MIL-101(Cr) an ideal candidate for membrane separation at the molecular level [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Construction of PPSU-MoS2/PA-MIL-101(Cr) Membrane with Highly Enhanced Permeance and Stability for Organic Solvent Nanofiltration

Liu

Xie

2022

Membranes

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Membranes with excellent separation performance and stability are needed for organic solvent nanofiltration in industrial separation and purification processes. Here we reported a newly PPSU-MoS2/PA-MIL-101(Cr) composite membrane with high permeance, good selectivity and stability. The MIL-101(Cr) was introduced in the polyamide (PA) layer via the PIP/TMC interfacial polymerization process on a microporous PPSU-MoS2 substrate. At a small doping amount of 0.005 wt% MIL-101(Cr), the PPSU-MoS2/PA-MIL-101(Cr) composite membrane exhibited a high methanol permeance of 12.03 L m-2 h-1 bar-1, twice higher than that of the pristine membrane without sacrificing selectivity. Furthermore, embedding MIL-101(Cr) notably enhanced the stability of the composite membrane, with permeance only decreasing by 8% after a long time operation of 80 hours (pristine membrane decreased by 25%). This work demonstrated a composite membrane modified by MIL-101(Cr) with superior separation performance, which provides potential application of MOF materials for high-performance membranes in organic solvent nanofiltration and a theoretical foundation for future research in studying MOF’s influence on membrane properties.

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“…41 Even for the MOFs with excellent thermal and chemical stabilities, water vapor could still reduce the adsorption of VOCs. 42 Currently, MIL-101(Cr) 43 and UIO-66 44 have the most potential as VOC adsorbents. However, they also suffer from the existence of water vapor, which seriously reduces their VOC adsorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Design of High-Humidity-Proof Hierarchical Porous P-ZIF-67(Co)-Polymer Composite Materials by Surface Modification for Highly Efficient Volatile Organic Compound Adsorption

Wang

et al. 2022

Ind. Eng. Chem. Res.

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The ubiquitous water vapor in industrial gas is a challenge for volatile organic compound (VOC) adsorbents. Herein, we have developed a strategy to improve the hydrophobicity and water stability of ZIF-67(Co) through internal and external modification. Through amine modification of the carrier surface rich in nanoscale roughness, the shape and size of ZIF-67(Co) are changed. ZIF-67(Co) is uniformly anchored on the macroporous surface of polyacrylates (PA) through interface coordination, forming a unique hierarchical porous structure. Compared with the original ZIF-67(Co), the toluene adsorption efficiency of ZIF-67(Co)@PA is increased by 2.75 times at 298 K and at a toluene partial pressure of P/P 0 = 0.005. Furthermore, to inhibit undesired water adsorption due to the rich defect sites, hydrophobically modified ZIF-67(Co)@PA (yielding P-ZIF-67(Co)@PA) has also been prepared, which exhibits a slight decrease in toluene adsorption and maintains the advantages of low water vapor adsorption and high hydrophobicity to improve the water stability of ZIF-67(Co).

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Implanting polyethylene glycol into MIL-101(Cr) as hydrophobic barrier for enhancing toluene adsorption under highly humid environment

Cited by 63 publications

References 63 publications

AuNPs@MIL-101 (Cr) as a SERS-Active Substrate for Sensitive Detection of VOCs

AuNPs@MIL-101 (Cr) as a SERS-Active Substrate for Sensitive Detection of VOCs

Construction of PPSU-MoS2/PA-MIL-101(Cr) Membrane with Highly Enhanced Permeance and Stability for Organic Solvent Nanofiltration

Design of High-Humidity-Proof Hierarchical Porous P-ZIF-67(Co)-Polymer Composite Materials by Surface Modification for Highly Efficient Volatile Organic Compound Adsorption

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