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Issue 28, 2013
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Microemulsion-assisted synthesis of hierarchical porous Ni(OH)2/SiO2 composites toward efficient removal of formaldehyde in air

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Abstract

Ni(OH)2/SiO2 composites with hierarchical flake-like nanostructures were synthesized using water-in-oil microemulsion and characterized by X-ray diffraction, thermogravimetry, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, nitrogen adsorption, and X-ray photoelectron spectroscopy. The as-prepared hierarchical porous Ni(OH)2/SiO2 composites show an excellent performance for formaldehyde (HCHO) removal in air at an ambient temperature. It was found that the aging time had a significant impact on the pore structure, surface area and HCHO adsorption. The Ni(OH)2/SiO2 composite aged for 4 h in the presence of tetraethyl orthosilicate (TEOS) exhibited a relatively high HCHO adsorption capacity as well as good recyclability compared with Ni(OH)2, attributed to a relatively large BET surface area, an optimal pore size, a suitable proportion between Ni(OH)2 and SiO2, and a synergistic effect between Ni(OH)2 and SiO2. The results from this work not only demonstrate that hierarchical porous Ni(OH)2/SiO2 composites can act as an efficient adsorbent toward HCHO in air, but suggest a new route for the rational design of cost-effective, high-performance and environmentally benign adsorbents for indoor air cleanup.

Graphical abstract: Microemulsion-assisted synthesis of hierarchical porous Ni(OH)2/SiO2 composites toward efficient removal of formaldehyde in air

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Publication details

The article was received on 23 Apr 2013, accepted on 30 Apr 2013 and first published on 01 May 2013


Article type: Paper
DOI: 10.1039/C3DT51067K
Citation: Dalton Trans., 2013,42, 10190-10197
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    Microemulsion-assisted synthesis of hierarchical porous Ni(OH)2/SiO2 composites toward efficient removal of formaldehyde in air

    Z. Xu, J. Yu, G. Liu, B. Cheng, P. Zhou and X. Li, Dalton Trans., 2013, 42, 10190
    DOI: 10.1039/C3DT51067K

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