Journal of Mathematical and Fundamental Sciences, 2014
Titanium oxide (TiO 2 ) was impregnated on the surface of titanosilicate-1 (TiO 2 /TS-1) and used... more Titanium oxide (TiO 2 ) was impregnated on the surface of titanosilicate-1 (TiO 2 /TS-1) and used as catalyst for hydroxylation of phenol with hydrogen peroxide. Calcination was conducted at various temperatures (400, 500, 600 and 700°C) in order to observe the effect on the structure and physicochemical properties towards catalytic activity for producing hydroquinone. The structure and physicochemical properties of the TiO 2 /TS-1 catalyst were characterized by several techniques, such as X-ray diffraction (XRD), infrared spectroscopy, nitrogen adsorption, pyridine adsorption and hydrophilic measurement. The results show that by increasing the calcination temperature, the surface acidity of the catalyst was also increased. The TiO 2 /TS-1 catalyst calcined at 500 °C proved to be optimal for hydroquinone production, in which the anatase-rutile phase may be present dispersed on the MFI framework.
Abstrak. Zeolit yang dikenali sebagai penapis molekul mempunyai sifat keliangan dan luas permukaa... more Abstrak. Zeolit yang dikenali sebagai penapis molekul mempunyai sifat keliangan dan luas permukaan tinggi telah digunakan sebagai bahan penjerap untuk menjerap bahan pencelup daripada air sisa berwarna. Zeolit mordenit asli yang berasal dari Indonesia telah diubahsuai kepada bentuk yang bersifat bes dan dikaji sifat penjerapannya terhadap bahan pencelup sintetik bes kuning 11. Seterusnya, jenis penjerapan sampel zeolit terhadap bahan pencelup
... Sdam, Member. IEEE and Ramli, Z. Department of Energy Conversion, Faculty of Electrical Engin... more ... Sdam, Member. IEEE and Ramli, Z. Department of Energy Conversion, Faculty of Electrical Engineering, Universiti Teknologi, Malaysia, 81 3 10 UTM Skudai, Johor, Malaysia. E-mail: zainals(iii,,fte.utm.mr,Tel:+607553 5206, Fax: +607-556 6272 ...
Bifunctional oxidative and acidic catalysts are prepared in this study. The sulfated titanium sil... more Bifunctional oxidative and acidic catalysts are prepared in this study. The sulfated titanium silicalite is prepared by first, synthesizing the titanium silicalite (TS-1) having oxidative properties, followed by the deposition of titanium on the surface of TS-1, and finally, treatment of the solid with sulfuric acid. The structure of the solid samples are characterized by XRD, FTIR, and UV-Vis DR spectroscopy techniques, while the strength and the type of acid site are monitored by Hammet indicator and pyridine adsorption method, respectively. The results show that the MFI structure of TS-1 is maintained even after the treatment with sulfuric acid. However, a part of the tetrahedral titanium framework of the TS-1 has been expelled from the framework and becomes nonframework octahedral titanium after contacting with sulfuric acid. The acidity study by Hammet indicator indicates that sample possesses superacidic property, measured by Hammet indicator 2,4dinitrobenzene (pKa = -14.52), in which the acid type is Lewis, from the pyridine adsorption.
The dispersion capacity of WO3 on the surface of titanium silicalite (TS-1) was evaluated by XRD ... more The dispersion capacity of WO3 on the surface of titanium silicalite (TS-1) was evaluated by XRD and FTIR spectroscopy techniques. The dispersion capacity of WO3 on TS-1 in the region of the hydroxyl groups using 3726 and 3505 cm -1 wavenumber are 0.40 and 0.38 W 6+ /nm 2 TS-1, respectively, while the dispersion capacity using bands in the framework region between 900-700 cm -1 wavenumber gave 0.40 W 6+ /nm 2 TS-1. These values are in a good agreement with the result from XRD analysis, i.e. 0.35 W 6+ /nm 2 TS-1.
Alhamdulillah, All Praises to Allah, The supreme Lord of the universe who has granted me everythi... more Alhamdulillah, All Praises to Allah, The supreme Lord of the universe who has granted me everything and makes it possible for me to finish this project (Project No.: 09-02-06-0057 SR0005/09-03) with success. Peace and blessing to Rasulullah SAW, all the prophets ...
Journal of Mathematical and Fundamental Sciences, 2014
Titanium oxide (TiO 2 ) was impregnated on the surface of titanosilicate-1 (TiO 2 /TS-1) and used... more Titanium oxide (TiO 2 ) was impregnated on the surface of titanosilicate-1 (TiO 2 /TS-1) and used as catalyst for hydroxylation of phenol with hydrogen peroxide. Calcination was conducted at various temperatures (400, 500, 600 and 700°C) in order to observe the effect on the structure and physicochemical properties towards catalytic activity for producing hydroquinone. The structure and physicochemical properties of the TiO 2 /TS-1 catalyst were characterized by several techniques, such as X-ray diffraction (XRD), infrared spectroscopy, nitrogen adsorption, pyridine adsorption and hydrophilic measurement. The results show that by increasing the calcination temperature, the surface acidity of the catalyst was also increased. The TiO 2 /TS-1 catalyst calcined at 500 °C proved to be optimal for hydroquinone production, in which the anatase-rutile phase may be present dispersed on the MFI framework.
Abstrak. Zeolit yang dikenali sebagai penapis molekul mempunyai sifat keliangan dan luas permukaa... more Abstrak. Zeolit yang dikenali sebagai penapis molekul mempunyai sifat keliangan dan luas permukaan tinggi telah digunakan sebagai bahan penjerap untuk menjerap bahan pencelup daripada air sisa berwarna. Zeolit mordenit asli yang berasal dari Indonesia telah diubahsuai kepada bentuk yang bersifat bes dan dikaji sifat penjerapannya terhadap bahan pencelup sintetik bes kuning 11. Seterusnya, jenis penjerapan sampel zeolit terhadap bahan pencelup
... Sdam, Member. IEEE and Ramli, Z. Department of Energy Conversion, Faculty of Electrical Engin... more ... Sdam, Member. IEEE and Ramli, Z. Department of Energy Conversion, Faculty of Electrical Engineering, Universiti Teknologi, Malaysia, 81 3 10 UTM Skudai, Johor, Malaysia. E-mail: zainals(iii,,fte.utm.mr,Tel:+607553 5206, Fax: +607-556 6272 ...
Bifunctional oxidative and acidic catalysts are prepared in this study. The sulfated titanium sil... more Bifunctional oxidative and acidic catalysts are prepared in this study. The sulfated titanium silicalite is prepared by first, synthesizing the titanium silicalite (TS-1) having oxidative properties, followed by the deposition of titanium on the surface of TS-1, and finally, treatment of the solid with sulfuric acid. The structure of the solid samples are characterized by XRD, FTIR, and UV-Vis DR spectroscopy techniques, while the strength and the type of acid site are monitored by Hammet indicator and pyridine adsorption method, respectively. The results show that the MFI structure of TS-1 is maintained even after the treatment with sulfuric acid. However, a part of the tetrahedral titanium framework of the TS-1 has been expelled from the framework and becomes nonframework octahedral titanium after contacting with sulfuric acid. The acidity study by Hammet indicator indicates that sample possesses superacidic property, measured by Hammet indicator 2,4dinitrobenzene (pKa = -14.52), in which the acid type is Lewis, from the pyridine adsorption.
The dispersion capacity of WO3 on the surface of titanium silicalite (TS-1) was evaluated by XRD ... more The dispersion capacity of WO3 on the surface of titanium silicalite (TS-1) was evaluated by XRD and FTIR spectroscopy techniques. The dispersion capacity of WO3 on TS-1 in the region of the hydroxyl groups using 3726 and 3505 cm -1 wavenumber are 0.40 and 0.38 W 6+ /nm 2 TS-1, respectively, while the dispersion capacity using bands in the framework region between 900-700 cm -1 wavenumber gave 0.40 W 6+ /nm 2 TS-1. These values are in a good agreement with the result from XRD analysis, i.e. 0.35 W 6+ /nm 2 TS-1.
Alhamdulillah, All Praises to Allah, The supreme Lord of the universe who has granted me everythi... more Alhamdulillah, All Praises to Allah, The supreme Lord of the universe who has granted me everything and makes it possible for me to finish this project (Project No.: 09-02-06-0057 SR0005/09-03) with success. Peace and blessing to Rasulullah SAW, all the prophets ...
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