TY - JOUR
T1 - Mesoporous Ti-KIT-6 molecular sieves
T2 - Their catalytic activity in the epoxidation of cyclohexene
AU - Kumaresan, L.
AU - Prabhu, A.
AU - Palanichamy, M.
AU - Murugesan, V.
N1 - Funding Information:
The authors acknowledge University Grants Commission (UGC), New Delhi for providing funds under special assistance-DRS programme and Department of Science and Technology (DST), New Delhi, under FIST programme for equipments facilities in the Department. The authors gratefully acknowledge the financial support from the Government of India, New Delhi and Council of Scientific and Industrial Research (CSIR) (Sanction No. 01(2096)/07/EMR-II) for this research work. One of the authors, L. Kumaresan is thankful to CSIR, New Delhi, for the award of a senior research fellow (SRF).
PY - 2010/11
Y1 - 2010/11
N2 - Titanium incorporated mesoporous KIT-6 molecular sieves with Si/Ti ratios 20, 50, 100, 150 and 200 were synthesized hydrothermally using triblock copolymer (Pluronic P123) as the structure directing template. The materials were characterized using XRD, BET, SEM, HR-TEM, FT-IR and UV-vis DRS. Their BET surface areas were in the range 675-780m2/g. TEM images demonstrated highly porous network with well ordered arrangement of pores. Ti-KIT-6 with Si/Ti ratios 100, 150 and 200 were found to contain both free TiO2 and framework Ti, whereas KIT-6 (20 and 50) contained only framework Ti. Their catalytic activity was evaluated in the epoxidation of cyclohexene with tert-butyl hydroperoxide (TBHP). Ti-KIT-6 (20 and 50) gave higher yield of cyclohexene oxide than others. This result revealed that the reaction is strongly influenced by framework titanium compared to non-framework one. The influence of solvent polarity on the epoxidation was also studied and it was found that the yield of cyclohexene oxide increased with the increase in the solvent polarity.
AB - Titanium incorporated mesoporous KIT-6 molecular sieves with Si/Ti ratios 20, 50, 100, 150 and 200 were synthesized hydrothermally using triblock copolymer (Pluronic P123) as the structure directing template. The materials were characterized using XRD, BET, SEM, HR-TEM, FT-IR and UV-vis DRS. Their BET surface areas were in the range 675-780m2/g. TEM images demonstrated highly porous network with well ordered arrangement of pores. Ti-KIT-6 with Si/Ti ratios 100, 150 and 200 were found to contain both free TiO2 and framework Ti, whereas KIT-6 (20 and 50) contained only framework Ti. Their catalytic activity was evaluated in the epoxidation of cyclohexene with tert-butyl hydroperoxide (TBHP). Ti-KIT-6 (20 and 50) gave higher yield of cyclohexene oxide than others. This result revealed that the reaction is strongly influenced by framework titanium compared to non-framework one. The influence of solvent polarity on the epoxidation was also studied and it was found that the yield of cyclohexene oxide increased with the increase in the solvent polarity.
KW - Cyclohexene oxide
KW - Epoxidation of cyclohexene
KW - Mesoporous molecular sieves
KW - TBHP
KW - Ti-KIT-6
UR - http://www.scopus.com/inward/record.url?scp=78649442776&partnerID=8YFLogxK
U2 - 10.1016/j.jtice.2010.02.004
DO - 10.1016/j.jtice.2010.02.004
M3 - Article
AN - SCOPUS:78649442776
SN - 1876-1070
VL - 41
SP - 670
EP - 675
JO - Journal of the Taiwan Institute of Chemical Engineers
JF - Journal of the Taiwan Institute of Chemical Engineers
IS - 6
ER -