Oxidation of Cyclohexane to Cylohexanol and Cyclohexanone Over H4[a-SiW12O40]/TiO2 Catalyst

https://doi.org/10.22146/ijc.21161

Aldes Lesbani(1*), Fatmawati Fatmawati(2), Risfidian Mohadi(3), Najma Annuria Fithri(4), Dedi Rohendi(5)

(1) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Kampus UNSRI Indralaya, Jl. Palembang Prabumulih Km 32 Ogan Ilir 30662, South Sumatera Integrated Research Laboratory, Graduate School, Sriwijaya University, Jl. Padang Selasa Bukit Besar Palembang
(2) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Kampus UNSRI Indralaya, Jl. Palembang Prabumulih Km 32 Ogan Ilir 30662, South Sumatera
(3) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Kampus UNSRI Indralaya, Jl. Palembang Prabumulih Km 32 Ogan Ilir 30662, South Sumatera
(4) Department of Pharmacy, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Kampus UNSRI Indralaya, Jl. Palembang Prabumulih Km 32 Ogan Ilir 30662, South Sumatera
(5) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Kampus UNSRI Indralaya, Jl. Palembang Prabumulih Km 32 Ogan Ilir 30662, South Sumatera
(*) Corresponding Author

Abstract


Oxidation of cyclohexane to cyclohexanol and cyclohexanone was carried out using H4[a-SiW12O40]/TiO2 as catalyst. In the first experiment, catalyst H4[a-SiW12O40]/TiO2 was synthesized and characterized using FTIR spectroscopy and X-Ray analysis. In the second experiment, catalyst H4[a-SiW12O40]/TiO2 was applied for conversion of cyclohexane. The conversion of cyclohexane was monitored using GC and GCMS. The results showed that H4[a-SiW12O40]/TiO2 was successfully synthesized using 1 g of H4[a-SiW12O40] and 0.5 g of TiO2. The FTIR spectrum showed vibration of H4[a-SiW12O40] appeared at 771-979 cm-1 and TiO2 at 520-680 cm-1. The XRD powder pattern analysis indicated that crystallinity of catalyst still remained after impregnation to form H4[a-SiW12O40]/TiO2. The H4[a-SiW12O40]/TiO2 catalyst was used for oxidation of cyclohexane in heterogeneous system under mild condition at 2 h, 70 °C, 0.038 g catalyst, and 3 mL hydrogen peroxide to give cyclohexanone as major product.

Keywords


cyclohexane; cyclohexanol; cyclohexanone; oxidation; H4[a-SiW12O40]/TiO2

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DOI: https://doi.org/10.22146/ijc.21161

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