Preparation of xerogel SiO2 from roasted iron sand under various acidic solution

8th International Conference on Physics and its Applications

Ramelan, A.H.^1 ; Wahyuningsih, S.^2 ; Ismoyo, Y.A.^2 ; Pranata, H.P.^2 ; Munawaroh, H.^2

Electronic Materials and Energy Research Group, Faculty of Mathematics and Natural Sciences, Sebelas Maret University, Indonesia^1

Inorganic Materials Research Group, Faculty of Mathematics and Natural Sciences, Sebelas Maret University, Jl. Ir. Sutami 36A, Kentingan, Jebres, Surakarta

57126, Indonesia^2

关键词: Acidic solutions;    Asymmetric stretching;    Color characteristics;    Compositional variation;    Decomposition products;    FT-IR spectrum;    HCl solution;    Symmetric stretching;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/776/1/012032/pdf
DOI  :  10.1088/1742-6596/776/1/012032

来源: IOP

【 摘 要 】

Xerogel SiO2had been prepared from roasted iron sand through variation of Na2CO3addition and sol-gel process under various acidic solution. Roasting treatment was carried out on the compositional variation of iron sand:Na2CO3= 1:2; 1:1 and 2:1 at 1100 °C. While the sol-gel process was conducted at room temperature and neutralized using HCl 0.1 M and 6 M. The color characteristics of roasted iron sand shown light brown, dark brown and dark gray of the compositional variation of iron sand:Na2CO3= 1:2; 1:1 and 2:1, respectively. In addition, the levels of thoughness increased by increasing the ratio of sand in the composition of the mixture. The best composition of roasted treatment was at a variety of iron sand:Na2SiO3= 1:2 with 57.72% had been dissolved in hot water. The addition of Na2CO3will influence the Na2SiO3formation, because of the increase of Na2CO3capable produced the iron sand decomposition product. Na2SiO3gel had been produced after it was neutralized with certain amount of HCl solution. The neutralization was more effective if using high concentration of HCl because of the formation of gel SiO2will be easier occurred. The results of SiO2had been identified by the FTIR spectra, which an absorption spectra of Si-O-Si asymmetric stretching at 1098.51 cm-1, symmetric stretching of Si-O-Si at 804.35 cm-1and the bending O-Si-O at 469.69 cm'1. The result of SiO2 content by XRF analysis is about 85.15%.