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Unformatted text preview: Prashant Adkine and W.A. Kamil Mahmood School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: [email protected] A series of Organic-Inorganic composites (OIc) material from epoxidised natural rubber (ENR -50) and using sol-gel and ultrasonic was prepared. The ENR-50 was used as organic phase and titania were used as inorganic phase. Different concentrations of titania were introduced into ENR-50. An ultrasonic irradiation with the frequency of 40 kHz was applied hasten the sol -gel reaction. The film materials obtained after one hour of reaction are transparent and flexible. These films are characterized using FTIR, UV-Vis, XRD, TGA-FTIR, DSC and SEM-EDX. All the samples prepared shows peak at 470 and 620 -1 cm attributed to Ti-O-Ti and Ti-O-C bond, respectively. UV-Vis spectra show that the films were transparent in the visible region. The XRD and TGA analysis shows these films are amorphous and homogenous respectively. There is an increase of the glass transition temperature ( Tg) for the films as compared to that of ENR-50. These films were doped with alkali salts such as LiCl, NaCl, and KCl at concentrations of 10 % weight into the films. The conductivity of the doped films shows an increase as + + the cation changes from K to Li . It is noted that the conductivity of the composite is similar to when it + was doped with K . MAT-O18 PREPARATION AND CHARACTERIZATION OF ALUMINA SUPPORTED GOLD NANOPARTICLES AND ITS APPLICATION IN THE REDUCTION OF p-NITROPHENOL
1 Hanani Yazid, *Rohana Adnan, Shafida Abdul Hamid and
1 1, 2 1, 3 Muhammad Akhyar Farrukh 2 School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia Department of Biotechnology, Kulliyyah of Science, International Islamic University Malaysia, 25200 Kuantan, Pahang, Malaysia 3 Department of Chemistry, GC University Lahore, Pakistan E-mail: [email protected] Gold nanoparticles supported on alumina were prepared at several pH levels v ia the depositionprecipitation (DP) method. The effects of pH at below and above the isoelectric point (IEP) of Al 2O3 as well as the pH adjustment before and after the addition of the support into the gold chloride solution were investigated. The results revealed the formation Au in form of cationic, clusters and metallic attached on alu...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.
- Spring '11