Etesamiyahoocom gold nanoparticles can be prepared by

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Unformatted text preview: used to synthesize gold nanoparticles using pencil graphite as a substrate. Pencil graphite was used as a working electrode after pretreatment. Electrochemical reduction of gold was carried out in acidic medium at r oom temperature without the use of any stabilizer or reducing agent. Parameters such as scan rate, potential range and number of cycles were varied to obtain the smallest size of particles. Scanning electron microscope (SEM) and transmission electron microscope (TEM) images were used to determine size of the electrodeposited gold nanoparticles. X-ray diffraction (XRD) data was used to characterize the synthesized gold nanoparticles. The XRD data showed that the ratios of crystallographic orientations vary by changing the applied conditions. The Harris texture coefficient was calculated from the ratio of diffraction intensities obtained from XRD data for each facet of the electrodeposited gold nanoparticles. Au(200) facet was enriched as the preferred orientation based on the calculated Harris texture coefficients. 80 3rd ICYC 2010 Universiti Sains Malaysia ANA-P10 23rd-25th June 2010 ELECTROCHEMICAL STUDY OF 3,4 DIHYDROXYBENZOIC ACID IN THE PRESENCE OF SODIUM DIETHYL DITHIOCARBAMATE Hanieh Ghadimi Islamic Azad University of Saveh, Branch Saveh, Iran E-mail: hanieh.ghadimi@yahoo.com Electrochemical treatment processes can significantly contribute to the protection of the environment through the minimization of waste and toxic materials in effluents. The organic electrochemical synthesis is another approach to green chemistry since many redox reagents were produced by electrochemical pathways. 3,4 dihydroxy benzoic acid (1) are widespread in the environment, 3,4 dihydroxi benzoic acid were used in pharmaceutical industry. Dihydroxybenzoic acid can be oxidized electrochemically to o- benzoquinones. The quinones can be attacked by a variety of nucleophiles. Dithiocarbamate (3) was used in cancer and as an antioxidant. No report has been published until now about the elec...
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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.

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