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A porous silica gel with both COOH and NH2 groups was synthesized in one pot by the addition of l-glutamic acid (l-GA) into a synthesis medium consisting of tetraethyl orthosilicate, water, ethanol, and 1-butylamine. The inclusion of l-GA in the as-synthesized product (l-GA-SiO2) was evidenced by FT-IR and TG measurements. The l-GA was chemically bonded with silica as indicated by the shift of FT-IR...
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