Photocatalytic degradation of RhB,MG, MB,Roz.B, 3-BL and CI-50 by PW12-APTES@MCF as nanosized mesoporous photocatalyst |
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Authors: | Razieh Fazaeli Hamid Aliyan Shahram Tangestaninejad Somaieh Parishani Foroushani |
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Affiliation: | 1. Department of Chemistry, Shahreza Branch, Islamic Azad University, 86145-311, Isfahan, Iran 2. Department of Chemistry, Mobarakeh Branch, Islamic Azad University, 84815-119, Isfahan, Iran 3. Department of Chemistry, Isfahan University, 81746-73441, Isfahan, Iran
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Abstract: | Surface of mesocellular silica foam (MCF) was modified by grafting 3-aminopropyltriethoxysilane (APTES) to have the positive charge, and thus, to provide sites for the immobilization of H3PW12O40 (PW12). This modified-nanosized mesoporous silica (PW12-APTES@MCF) was characterized by FTIR, XRD, BET and TEM. The photoefficiency of this nanosized mesoporous toward photodegradation of six dye solutions [rhodamine B, malachite green, methylene blue, rose bengal, solophenyl red (3-BL), yellow direct 50 (CI-50)] was investigated in a photocatalytic reactor using UV lamp as a light source. The effect of various experimental parameters on the degradation performance of the process was evaluated by examining catalyst dosage, initial dye concentration and pH of the dye solution in the presence of PW12-APTES@MCF. The photocatalytic behaviors of the PW12-APTES@MCF were also compared with two mesoporous silica-supported PW12-APTES@SBA-15 and PW12-APTES@KIT-6. It indicated that the PW12-APTES@MCF had the highest photocatalytic efficiency among three mesoporous silica-supported PW12-APTES. These photocatalysts can be reused several times although they get less active. |
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