SYNTHESIS AND CHARACTERIZATION OF STRUCTURAL NANOCOMPOSITE TITANIUM DIOXIDE COPPER-DOPED USING THE IMPREGNATION METHOD

Nanocomposite Titanium Dioxide (TiO2) doped Copper (Cu), Cu-TiO2 is synthesized by the impregnation method. This study aims to determine the effect of adding Cu to the TiO2 structure. 1, 3, and 5 Cu with% TiO2 dissolved in 50 ml of deionized water, and 3 grams of TiO2 added. The compound is then stirred for 2 hours at 900C and dried in an oven at 1100C for 30 minutes. Drying samples were calcined at 5000C for 3 hours. Cu-TiO2 nanocomposites were characterized by XRD, SEM-EDX Mapping, and FTIR. The XRD analysis results show that Cu-TiO2 nanocomposite has a high level of crystallinity and has an anatase phase structure. The size of TiO2 crystals decreased with Cu doping and increased from 49.66 nm to 49.68 nm, with an increase in the composition of the doping mass of Cu. The SEM-EDX Mapping results show that all samples tend to clot, and Cu dopants evenly distributed on the surface of TiO2. FTIR analysis explained the presence of hydroxyl ions in the sample marked with the appearance of the absorption peak at 1658.78 cm-1 associated with -OH bending of Ti-OH.

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Synthesis and Characterization of Bimetallic Fe/Co Nanocatalyst on CNTs for Fischer-Tropsch Reaction

Journal of Nano Research ◽

10.4028/www.scientific.net/jnanor.16.9 ◽

2012 ◽

Vol 16 ◽

pp. 9-14 ◽

Cited By ~ 3

Author(s):

Sardar Ali ◽

Noor Asmawati Mohd Zabidi ◽

Duvvuri Subbarao

Keyword(s):

Particle Size ◽

Physicochemical Properties ◽

Average Particle Size ◽

Xrd Analysis ◽

Synthesis And Characterization ◽

Average Particle ◽

Impregnation Method ◽

Fischer Tropsch ◽

Temperature Programmed

Cobalt and iron are common catalysts used in the Fischer-Tropsch (FT) reaction. This paper presents the synthesis and characterization of monometallic and bimetallic cobalt and iron nanoparticles supported on carbon nanotubes (CNTs). The CNTs-supported nanocatalysts were synthesized by a wet impregnation method at various ratios of Fe:Co. The physicochemical properties of the samples were analyzed by H2-temperature programmed reduction (TPR), CO and H2-chemisorption analyses, transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis. The effects of incorporation of Fe into Co on the physicochemical properties of Co/CNTs in terms of degree of reduction, CO and H2 chemisorptions and morphologies were investigated. TEM showed that metal nanoparticles were well dispersed on the external surface and inside the CNTs. For monometallic Co/CNTs and Fe/CNTs, the average metal particle size was 5±1 nm and 6±1 nm, respectively. For the bimetallic 70Co30Fe/CNTs nanocatalysts, the average particle size was found to be 4±1 nm. Metal particles attached to the outer walls were bigger than the ones inside the CNTs. H2-TPR analysis of Co/CNTs indicated two temperature regions at 330°C (low temperature) and 491°C (high temperature). The incorporation of iron into cobalt nanocatalysts of up to 30 % of the total metal loading enhanced the catalyst’s H2 and CO chemisorptions capacities and reducibility.

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Alternatif Pembuatan Biodiesel Melalui Transesterifikasi Minyak Castor (Ricinus communis) Menggunakan Katalis Campuran Cangkang Telur Ayam dan Kaolin

Jurnal Kimia VALENSI ◽

10.15408/jkv.v3i1.4778 ◽

2017 ◽

Vol 3 (1) ◽

pp. 1-10

Author(s):

Soni Setiadji ◽

Nila Tanyela B ◽

Tety Sudiartati ◽

Eko Prabowo ◽

Bebeh Wahid N

Keyword(s):

Methyl Ester ◽

Castor Oil ◽

Functional Group ◽

Ricinus Communis ◽

Xrd Analysis ◽

Aluminum Silicate ◽

Impregnation Method ◽

Ftir Analysis ◽

Biodiesel Feedstock

Biodiesel was produced by transesterification of castor oil (Ricinus communis) using a catalyst of CaO and kaolin (CaO / kaolin) had been performed. CaO was obtained from the calcination of eggshell. Castor oil is selected as biodiesel feedstock because it belongs to non-food oil and easy to cultivate. In general, the research method aims to comprise the CaO / Kaolin catalysts with a ratio of 15 mmol CaO per 1 gram of kaolin activated using impregnation method and biodiesel produced through transesterification of castor oil using the catalyst at 65 ºC for 8 hours with ratio of castor oil: methanol: catalyst (1: 15: 5% w / w). The reaction is carried out on the reflux system. The XRD analysis show the presence of silica and potassium aluminum silicate hydroxide in the catalyst. The EDS results show the catalyst-forming components CaO and silica. The FTIR analysis results show the absorption peak in the functional group forming the methyl ester compound. Based on the characterization of GC-MS, the largest methyl ester components contained in biodiesel are methyl risinoleate, methyl elaidat, methyl stearate, methyl linoleate, and methyl palmitate. The overall conversion of castor oil to methyl ester using CaO / kaolin catalyst is 97.36%. The largest component in castor oil is risinoleic acid, has been successfully converted to methyl risinoleate by 74.75%.DOI: http://dx.doi.org/10.15408/jkv.v0i0.4778

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Synthesis and Characterization of Chitosan/Hydroxyapatite Biocomposites Obtained by Reaction of Precipitation

Materials Science Forum ◽

10.4028/www.scientific.net/msf.727-728.614 ◽

2012 ◽

Vol 727-728 ◽

pp. 614-618 ◽

Cited By ~ 1

Author(s):

Rita de Cássia A. Leal ◽

A.C.B.M. Fook ◽

I.V.S.R. Nascimento ◽

Marcus Vinícius Lia Fook

Keyword(s):

Xrd Analysis ◽

Sem Analysis ◽

Tissue Response ◽

Synthesis And Characterization ◽

Ftir Analysis ◽

New Bone Formation ◽

Degradation Rates ◽

Bone Graft Substitutes ◽

Chitosan Biopolymer

There is a growing need for new biomaterials that can gain predictable and controlled tissue response, this is, that as bone graft substitutes should initiate new bone formation, after which they should get reabsorbed and replaced by bone tissue. This combination aims to improve the mechanical properties, degradation rates and absorption rates of biocompatibility and biodegradability. The aim of this study was to propose a synthetic route in which the HA was obtained by reaction of precipitation directly on evaluating the influence of chitosan biopolymer in the middle of precipitation in the characteristics of hydroxyapatite obtained. XRD analysis revealed the presence of HA phase with low crystallinity. In the FTIR analysis identified the characteristic bands of hydroxyapatite, as well as bands that characterize an interaction between chitosan and hydroxyapatite, as the band around 1050cm-1. SEM analysis of the biocomposites chitosan/HA, showed a dispersion of HA particles in chitosan, revealing a homogenous material and microporous.

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