Zhong Xie

Dalian University of Technology, Lü-ta-shih, Liaoning, China

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Publications (5)41.04 Total impact

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    ABSTRACT: Here we report a modified "two in one" strategy through depositing of ZnO particles onto the macroporous alpha-alumina tubes with average pore size of 2-3 mu m for synthesis of ZIF-8 membranes. The LTA or Al2O3 particles as fillers were firstly deposited to patch the large defects in the support then the ZnO particles were deposited. The ZnO particles reduce the pore size and simultaneously act as "metal source" to create a high supersaturation degree to promote high heterogeneous nucleation sites. Through such strategy, continuous and crack-free ZIF-8 membranes were successfully obtained, exhibiting H-2 permeance of 3.4 x 10(-7) mol m(-2) s(-1) Pa-1 at 150 degrees C, with ideal selectivities for H-2/CO2, H-2/N-2, H-2/CH4 and H-2/C3H8 system of 7.4, 8.8, 8.2 and 37.8, respectively. When the supports deposited with ZnO particles were treated by pre-reacting with the ligand of 2-methylimidazole, big cracks/gaps occurred at the interface between the ZIF-8 membranes and the supports. This modified "two in one" strategy can be extended for synthesis of large variety of MOFs membranes on large-pore supports through the rational selection of metal oxides.
    Microporous and Mesoporous Materials 11/2014; 198:263–270. DOI:10.1016/j.micromeso.2014.07.038 · 3.45 Impact Factor
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    ABSTRACT: A thin tubular CAU-1 membrane of 2-3 μm exhibiting a high CO2 permeance of up to 1.34 × 10(-6) mol m(-2) s(-1) Pa(-1) and a CO2-N2 selectivity of 17.4-22.8 for CO2-N2 mixtures was achieved, demonstrating for the first time that amino-functionalized MOF membranes can provide high CO2-N2 selectivity and possess the potential for CO2 capture from flue gas.
    Chemical Communications 02/2014; 50(28). DOI:10.1039/c4cc00068d · 6.83 Impact Factor
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    ABSTRACT: Through deposition of APTES-functionalized Al(2)O(3) particles onto a coarse macroporous support, a new strategy to reduce the pore size and simutaneously promote a high density of heterogeneous nucleation sites was developed, and a continuous and thin ZIF-8 membrane exhibiting remarkably high H(2) permeance of 5.73 × 10(-5) mol m(-2) s(-1) Pa(-1) and H(2)/N(2) ideal selectivity of 15.4 was achieved.
    Chemical Communications 02/2012; 48(48). DOI:10.1039/c2cc17607f · 6.83 Impact Factor
  • Source
    Pengyan Wu · Jian Wang · Yaming Li · Cheng He · Zhong Xie · Chunying Duan ·
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    ABSTRACT: A multifunctional lanthanide-organic framework Tb−TCA (H3TCA = tricarboxytriphenylamine) comprising a triphenylamine moiety as an efficient luminescence sensitizer is synthesized by a solvothermal method and structurally characterized. Tb−TCA exhibits lanthanide-based emission (540 nm) and triphenylamine emission (435 nm) after excitation at 350 nm and works as a luminescent chemosensor towards salicylaldehyde with a sensitivity of 10 ppm under optimized conditions. Tb−TCA features a high concentration of Lewis acid Tb3+ sites and Lewis base triphenylamine sites on its internal surfaces; it thus enables both Knoevenagel and cyanosilylation reactions in a size-selective fashion. The ratiometric fluorescent response towards aldehydes (I540/I435) demonstrates that the absorption of the porous material is size selective, and the interactions between the aldehyde molecules and the Tb3+ ions play a dominant role in the absorption and activation of the aldehyde substrates. In particular, these studies provide opportunities to directly validate the sorption sites and the catalytic mechanism of the multifunctional Ln metal–organic framework material by luminescence.
    Advanced Functional Materials 07/2011; 21(14):2788 - 2794. DOI:10.1002/adfm.201100115 · 11.81 Impact Factor
  • Source
    Dongbin Dang · Pengyan Wu · Cheng He · Zhong Xie · Chunying Duan ·
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    ABSTRACT: Homochiral crystallizations of two enantiomeric metal-organic frameworks (MOFs) Ce-MDIP1 and Ce-MDIP2 were achieved by using L- or D-BCIP as chiral inductions, respectively, where the chiralities were characterized by solid state CD spectra. Ce-MDIPs exhibit excellent catalytic activity and high enantioselectivity for the asymmetric cyanosilylation of aromatic aldehydes; the homochiral Cd-TBT MOF having L-PYI as a chiral adduct exhibits stereochemical catalysis toward the Aldol reactions.
    Journal of the American Chemical Society 09/2010; 132(41):14321-3. DOI:10.1021/ja101208s · 12.11 Impact Factor