The rapid economic development has also brought many environmental problems while providing people with a high quality of life. In particular, a large number of industrial solid wastes have become increasingly prominent. This facilitates the synthesis of highly active and doped mesoporous molecular sieves inexpensively because some industrial solid wastes contain both silicon species and transition metal elements. In this paper we used mixed surfactants system as template and the industrial silicon slag with zirconium as raw material for the synthesis process of zirconium substituted mesoporous molecular sieve. In the synthesis process, cationic surfactants (cetyltrimethylammonium bromide CTAB was used in this paper) were mainly used, and other surfactants (such as nonionic surfactant polyphenol vinyl ether-10, OP-10; neutral primary amine dodecylamine, DDA, and anionic surfactant sodium dodecyl benzene sulfonate, SDBS and sodium dodecyl sulfate SDS) supplemented, the effect of different mixed surfactants systems on the synthesis of zirconium substituted mesoporous molecular sieves in hydrothermal system were studied. In order to improve the synthesis repeatability, the effects of various factors on the proprietary of zirconium substituted mesoporous molecular sieves, such as the molar ratios of water to silicon and mixed surfactants to SiO2, crystallization temperature and crystallization time were also studied. The sample obtained under optimum conditions were characterized with different methods. The results showed that the optimized synthesis system was the mixed anionic and cationic surfactants (CTAB and SDBS), the suitable mole ratios of surfactant/SiO2 and H2O/SiO2 were 0.15 and 58, respectively. The optimized crystallization temperature and time were 100℃ and 48 h. The zirconium substituted mesoporous molecular sieves had a clear diffraction peak in the low angle region, indicating that the sample had a certain long-range order. The interplanar spacing d was 9.71 nm, the average pore diameter was 5.55 nm and the wall thickness was 4.16 nm. The zirconium substituted sample had a three-dimensional worm-like pore structure. For the mixed dyes solution of methylene blue, rhodamine B and methyl orange, the sample showed a good selective adsorption ability to methylene blue, the adsorption rate was 90.31%.
Yue LIU Lei CAO Da LI Kun CAO Fusheng SUI Wei ZHAO Wei Lü Tao QI
. Synthesis of zirconium substituted mesoporous molecular sieve using mixed surfactants as templates[J]. The Chinese Journal of Process Engineering, 2018
, 18(5)
: 1082
-1087
.
DOI: 10.12034/j.issn.1009-606X.217433
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