TY - JOUR
T1 - Synthesis, characterization and catalytic performance for phenol hydroxylation of Fe-MCM41 with high iron content
AU - Wu, Cheng
AU - Kong, Yan
AU - Gao, Fei
AU - Wu, Yong
AU - Lu, Yinong
AU - Wang, Jun
AU - Dong, Lin
PY - 2008/8/1
Y1 - 2008/8/1
N2 - A series of Fe-MCM41s with different iron content have been synthesized and characterized by XRD, BET, HRTEM, FT-IR, UV-vis and ICP techniques. Their catalytic performances for the direct hydroxylation of phenol were also studied. Results indicated that the mesoporous structure did not collapse until the Fe/Si molar ratio reached up to 0.20. The iron species were mainly in the framework with isolated tetrahedral coordination as Fe/Si molar ratio was smaller than 0.091 and micro-crystals of Fe2O3 were detected when iron content increased further. The prepared samples exhibited excellent catalytic activities for the direct hydroxylation of phenol by hydrogen peroxide at room temperature, which increased with iron content in the framework of MCM41 and did not decline after being recycled 6 times. As Fe/Si molar ratio increased to more than 0.091, the catalytic activity decreased gradually with iron content due to the covering of some active sites, i.e., the incorporated iron species with tetrahedral coordination, by the accumulated Fe2O3 on the surface of the catalyst.
AB - A series of Fe-MCM41s with different iron content have been synthesized and characterized by XRD, BET, HRTEM, FT-IR, UV-vis and ICP techniques. Their catalytic performances for the direct hydroxylation of phenol were also studied. Results indicated that the mesoporous structure did not collapse until the Fe/Si molar ratio reached up to 0.20. The iron species were mainly in the framework with isolated tetrahedral coordination as Fe/Si molar ratio was smaller than 0.091 and micro-crystals of Fe2O3 were detected when iron content increased further. The prepared samples exhibited excellent catalytic activities for the direct hydroxylation of phenol by hydrogen peroxide at room temperature, which increased with iron content in the framework of MCM41 and did not decline after being recycled 6 times. As Fe/Si molar ratio increased to more than 0.091, the catalytic activity decreased gradually with iron content due to the covering of some active sites, i.e., the incorporated iron species with tetrahedral coordination, by the accumulated Fe2O3 on the surface of the catalyst.
KW - Fe-MCM41
KW - Iron content
KW - Phenol hydroxylation
KW - Room temperature
UR - http://www.scopus.com/inward/record.url?scp=44449156475&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2007.11.013
DO - 10.1016/j.micromeso.2007.11.013
M3 - 文章
AN - SCOPUS:44449156475
SN - 1387-1811
VL - 113
SP - 163
EP - 170
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
IS - 1-3
ER -