Journal
DALTON TRANSACTIONS
Volume 42, Issue 28, Pages 10190-10197Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3dt51067k
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Funding
- 863 Program [2012AA062701]
- 973 Program [2013CB632402]
- NSFC [51072154, 21177100, 51272199]
- Key Project of Chinese Ministry of Education [212115]
- PSFC [2012M521482]
- HBECF [Q20102903]
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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.
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