Electronic Supplementary Information, ESI
SiO2 beads decorated with SrO nanoparticles for biodiesel production from waste cooking oil using microwave irradiation Alex Tangy,a Indra Neel Pulidindi,a and Aharon Gedankena,b* a
Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel and
b
Department of Materials Science and Engineering, National Cheng Kung University, Tainan
70101, Taiwan Tel: +972-3-5318315; Fax: +972-3-7384053; *E-mail:
[email protected] Figure S1. Modified domestic microwave oven
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SrO SrCO3
16000
Intensity (a.u.)
12000
8000
4000
0 10
20
30
40 50 2θ (degree)
60
70
Figure S2. The XRD pattern of the material obtained after calcination of SrCO3@SiO2 at 900 °C for 2 h in air
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Sr(OH)2
SrCO3
SrO
Intensity (a.u.)
5 min.
3 min. 1 min.
30 sec.
10
20
30
40 50 2θ (degree)
60
70
Figure S3. The effect of calcination temperature (900 °C, 3 h) on the conversion of SrCO3@SiO2 to SrO@SiO2
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Figure S4. The XRD pattern of commercial SrO (standard) from Sigma-Aldrich
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Figure S5. Pictorial representation of the catalyst (SrO@SiO2) preparation under microwave irradiation
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Figure S6. Product obtained from the transesterification reaction
Figure S7. A typical 1H NMR of FAME obtained from transesterification of cooked oil with SrO@SiO2 yielding 99.4 wt. % conversion
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