Additional file 1: Figure S1..

TG curves of as-prepared MCM-41 synthesized from three subsequent cycles: (a) M-1, (b) M-2, and (c) M-3. Figure S2. Infrared spectra of fresh CTABr (black) and CTABr recrystallized from waste mother liquor (red). The presence of -OH bands at 3,375 and 1,630 cm−1 in recrystallized CTABr are due to the adsorption of moisture from environment. (DOCX 91 kb)

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Ng et al. Nanoscale Research Letters 2013 8:120   doi:10.1186/1556-276X-8-120