School of Materials Engineering, University Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
J Environ Sci (China). 2012;24(6):1142-8. doi: 10.1016/s1001-0742(11)60872-3.
Fish scale (FS) loaded TiO2 composites were investigated as photocatalysts in degradation of Methyl Orange under solar light irradiation. Composites were prepared through sol-gel method by varying mass ratio of TiO2/FS at 90:10, 70:30 and 50:50, respectively. The catalysts prepared in this study were characterized by using XRD, SEM, FT-IR and nitrogen sorption. The effects of solar irradiation, mass ratio of TiO2/FS composites, irradiation time and catalyst loadings were studied. Synergistic effect was found in TiO2/FS of 90:10 composite which performed higher photocatalytic degradation than synthesized TiO2 under solar light irradiation. However, further increasing fish scale content in the composites reduced the photocatalytic activity drastically. Under solar light irradiation, all the catalysts in this study exhibited photocatalytic activity, except TiO2/FS of 50:50 composite that only acted as a weak biosorbent without performing any photocatalytic property. Photocatalytic degradation increased with increasing catalyst loading and irradiation time but decreased with increased of initial dye concentration.
研究了负载鱼鳞（FS）的 TiO2 复合材料作为光催化剂，在太阳光照射下降解甲基橙。通过溶胶-凝胶法制备复合材料，TiO2/FS 的质量比分别为 90:10、70:30 和 50:50。用 XRD、SEM、FT-IR 和氮气吸附对所制备的催化剂进行了表征。研究了太阳光照射、TiO2/FS 复合材料的质量比、照射时间和催化剂负载量的影响。在 TiO2/FS 的 90:10 复合材料中发现了协同效应，其在太阳光照射下的光催化降解性能高于合成的 TiO2。然而，进一步增加复合材料中鱼鳞的含量会大大降低光催化活性。在太阳光照射下，除了 TiO2/FS 的 50:50 复合材料仅作为弱生物吸附剂而没有表现出任何光催化性能外，本研究中的所有催化剂都表现出光催化活性。光催化降解随催化剂负载量和照射时间的增加而增加，但随初始染料浓度的增加而降低。
