Synthesis of Zeolite β@IISERP-COF2 Core-shell Hybrid Materials†

doi:10.7503/cjcu20180071

Abstract

Abstract:

Zeolite β was crystallized from precursor solutions within the pores of anion exchange resin beads. Resin beads as sacrificial template was removed by calcination leaving stable beads of zeolite β. We use the zeolite β beads as substrate to cover a layer hydrophobic IISERP-COF2, termed as zeolite β@IISERP-COF2. There is definite advantage in transferring the hydrophobicity of COFs to zeolite to aid their adsorb CO₂ in humid environment. Water adsorption capacity(measured under 79% humidity) of zeolite β@IISERP-COF2(2.1%) shows a significant decrease compared to that of zeolite β(11.0%).

Key words: Zeolite β beads;, Covalent organic frameworks(COFs), Core-shell, Hydrophobicity

CLC Number:

O613.7

TrendMD:

HUANG Weiwei, REN Jiawang, FANG Qianrong, Valentin VALTCHEV. Synthesis of Zeolite β@IISERP-COF2 Core-shell Hybrid Materials^†[J]. Chem. J. Chinese Universities, 2018, 39(6): 1127.

Figures/Tables 7

Scheme 1 Schematic illustration of the synthesis of zeolite β beads

Scheme 2 Schematic illustration of the synthesis of zeolite β@IISERP-COF2

Fig.1 SEM images of resin beads(A, D), zeolite β beads(B, E) and composite(C, F) with different magnifications

Fig.2 SEM cross section images of zeolite(A, C) and composite(B, D)

Fig.3 XRD patterns of IISERP-COF2(a), composite(b) and zeolite β beads(c)

Fig.4 FTIR spectra of IISERP-COF2(a), zeolite β beads(b) and composite(c)

Table 1 Water soaking properties of three samples

Temperature/℃	w(%)
Temperature/℃	Zeolite	IISERP-COF2	Composite
40—150	-10.1	-1.0	-1.2
200—250	-0.9	-0.3	-0.9
250—700	-2.0	-95.7	-21.7

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