Fabrication of nano-sized Ca(OH)2 with excellent adsorption ability for N2O4

[Display omitted] ► Nano-size Ca(OH)2 was synthesized from CaO in the presence of PEG and SDS. ► Nano-size Ca(OH)2 samples are fabricated using digestion method. ► Nano-size Ca(OH)2 with the specific surface area as high as 58m2/g and 92m2/g. ► Samples P-10-5 and S-0.086-5 have uniform pore sizes of...

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Bibliographic Details
Published in:Particuology 2012-12, Vol.10 (6), p.737-743
Main Authors: Du, Yucheng, Meng, Qi, Hou, Ruiqin, Yan, Jing, Dai, Hongxing, Zhang, Tong
Format: Article
Language:English
Subjects:
Adsorption
Digestion method
Nano-sized Ca(OH)2
Nanomaterials
Nanostructure
NOx collecting
Scanning electron microscopy
Single crystals
Specific surface
Surface chemistry
Surfactant
Surfactants
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Summary:[Display omitted] ► Nano-size Ca(OH)2 was synthesized from CaO in the presence of PEG and SDS. ► Nano-size Ca(OH)2 samples are fabricated using digestion method. ► Nano-size Ca(OH)2 with the specific surface area as high as 58m2/g and 92m2/g. ► Samples P-10-5 and S-0.086-5 have uniform pore sizes of 5–14nm and 5–9nm. ► Samples P-10-5 and S-0.086-5 have 59.43% and 94.67% high NOx removal rate. Uniform nano-sized calcium hydroxide (Ca(OH)2) monocrystal powder was synthesized from calcium oxide in a surfactant solution via a digestion method by decreasing the surface tension of the reaction system to control the growth of crystalline Ca(OH)2. The Ca(OH)2 monocrystal powder samples were characterized by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), and Fourier transform-infrared spectroscopy (FT-IR). The NOx adsorption ability of the samples was evaluated, and the influence of various types and concentrations of surfactants on powder agglomeration and then the specific surface area in the precipitation process were studied. The specific surface area of the samples was found as high as 58m2/g and 92m2/g and the particle size, 300–400nm and 200–300nm in the presence of 10wt% PEG600 and 0.086mL/L SDS at a reaction time of 5h, respectively. The product has an exceptionally strong adsorption ability for NOx, which makes it a highly promising adsorbent for emission control and air purification.
ISSN:1674-2001
2210-4291
DOI:10.1016/j.partic.2012.03.010