Pillarization of layer double hydroxides (Mg/Al) with keggin type K4[α-SiW12O40]•nH2O and its application as adsorbent of procion red dye
Pillarization of layered double hydroxides with polyoxometalate K4[α-SiW12O40]•nH2O at various times i.e. 3, 6, 9, 12, 24, 36 and 48 hours has been done. The pillared product was characterized by FT-IR spectrophotometer and XRD. The optimum pillared layered double hydroxides of polyoxometalate K4[α-...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Magister Program of Material Sciences, Graduate School of Universitas Sriwijaya
2017-07-01
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| Series: | Science and Technology Indonesia |
| Online Access: | http://sciencetechindonesia.com/index.php/jsti/article/view/22 |
| Summary: | Pillarization of layered double hydroxides with polyoxometalate K4[α-SiW12O40]•nH2O at various times i.e. 3, 6, 9, 12, 24, 36 and 48 hours has been done. The pillared product was characterized by FT-IR spectrophotometer and XRD. The optimum pillared layered double hydroxides of polyoxometalate K4[α-SiW12O40]•nH2O was used as an adsorbent of procion red dye. The results of characterization using FT-IR spectrophotometer is not yet show the optimum pillarization process. The characterisation using XRD the successfully of pillared layered double hydroxides of polyoxometalate K4[α-SiW12O40]•nH2O showing the existence of diffraction angle 8.5o with intensity 355. Furthermore, the pillared layered double hydroxides of polyoxometalate K4[α-SiW12O40]•nH2O with time variation of 12 hours was applied as an adsorbent of procion red dye. The results show the adsorption rate was 0.523 min-1, the highest of absorption capacity at 70oC was 10.8 mol/g, the highest energy of absorption 70 oC was 125 kJ/mol. The enthalpy (∆H) and entropy (∆S), decrease as the increasing concentration of procion red dye.
Keywords: layered double hydroxides, polyoxometalate, pillaration, procion red, adsorption |
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| ISSN: | 2580-4405 2580-4391 |