Adsorption of Methyl Blue on Mesoporous Materials Using Rice Husk Ash as Silica Source

作者：Nhat Thien Nguyen, Shiao‐Shing Chen, Nguyen Cong Nguyen, Hau Thi Nguyen, Hsiao Hsin Tsai, Chang Tang Chang · 发表于：Journal of Nanoscience and Nanotechnology · 年份：2016 · DOI：10.1166/jnn.2016.10704 · 被引用次数：13 · 研究领域：Adsorption and biosorption for pollutant removal、Mesoporous Materials and Catalysis

It is recognized that recycling and reuse of waste can result in significant savings in materials and energy. In this research, the adsorption of methyl blue (MB) using waste rice husk ash (Rha) and mesoporous silica materials made from Rha (R-MCM) were analyzed. Mesoporous silica materials were synthesized using cetyltrimethyl ammonium bromide (CTAB) as a cationic surfactant and Rha as the silica source. The prepared samples were characterized by Brunnaur-Emmet-Teller (BET) adsorption isotherm analyzer and transmission electron microscope (TEM) analysis. The results showed the surface area of R-MCM materials was 1347 m2g-1 and the pore volume was 0.906 cm3g-1. TEM analysis showed that the mesoporous materials generally exhibited ordered hexagonal arrays of mesopores with a uniform pore size. The effects on adsorption performance under different initial dye concentrations, different pH values and different dosages of adsorbent were also studied. Both Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms. The results show that the maximum removal efficiency of MB more than 99%.