CuO nanoparticles at ca. 20-50 nm were successfully coated on monodispersed silica spheres prepared by modified sol-gel method. A renewable palm oil based decyl-alcohol (C10) was employed as nonsurfactant surface modifier prior to coating with CuO. Various amounts of ammonia (NH3) (0-1 ml) was as catalyst during the modification process to study the effect in homogeneous deposition of CuO on silica surfaces. The homogeneous depositions of CuO on silica were achieved with the addition of 0.9 ml of NH3. The optical absorption peak and energy band gap (Eg) values were at ca. 1.8-2.18 eV suitable for semiconductor and optical sensor materials.
In this study, a three-dimensional (3D) copper-based metal-organic framework (MOF-199) is a microporous materials with structural formula Cu3(BTC)2 (1,3,5-benzene tricarboxylate) were successfully synthesized using nonsurfactant templating method. The preparations of MOF-199 utilized different length of straight carbon chain (oleochemical) fatty alcohols derived from palm oil were similar to those reported earlier by our group with some modifications [1]. This new method led to unique structure and properties of as-synthesized MOF-199. The addition of fatty alcohols such as octyl (C8) and decyl (C10) alcohol act as renewable template onto MOF-199 generating the required carbon template for microporous crystalline structure [2]. The MOF-199 had been synthesized using conventional hydrothermal method with the present of fatty alcohols to analyse the resulting MOF-199 in terms of structure, morphology, surface area and adsorption isotherm. MOF-199 synthesized in this study exhibited single crystal orthorhombic morphology at ca. 30 micron. The crystallinity of MOF-199 materials was improved by the addition of fatty alcohols as observed in the X-Ray Diffraction patterns.
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