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Chem Info
Published by Universitas Diponegoro
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Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
CHEMINFO JOURNAL adalah jurnal saintifik yang diterbitkan secara periodik 3 bulanan oleh Jurusan Kimia, Fakultas Sains dan Matematika Universitas Diponegoro Semarang. Jurnal ini sebagai media publikasi hasil karya ilmiah lulusan S1 Jurusan Kimia.
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Articles 13 Documents
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Search results for , issue "Vol 1, No 2 (2013)" : 13 Documents clear
Electrophotocatalysis and Photocatalysis Methods By Using TiO2 For Decolorization of Remazol Red RB and Decreasing of Cd2+ Ion Concentration in Simultaneously Anggraini, Riska Marina; Haris, M.Si, Drs. Abdul; Prasetya, S.Si, M.Sc., Nor Basid Adiwibawa
Chem Info Journal Vol 1, No 2 (2013)
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A study entitled Electrophotocatalysis and Photocatalysis Methods By Using TiO2 For Decolorization of Remazol Red RB and Decreasing of Cd2+ Ion Concentration Simultaneousy has been done. This study aimed to determine the effect of TiO2 photocatalyst of the decrease of Cd2+ and the effect of electrical potential on decolorization of Remazol Red RB and decrease of Cd2+ concentration simultaneously. TiO2/FTO was used as anode, on the other hand carbon was used as cathode, while the UV-C lamp was used as photon source. Electrophotocatalysis and photocatalysis were performed for 240 minutes. The final results were analyzed using UV-Vis Spectrophotometer for determining the absorbance of the Remazol Red RB remained and using Atomic Absorption Spectrophotometry (AAS) for determining Cd2+ remained. The results showed that the percentage of decolorization of dye solution containing Remazol Red RB and Cd2+ ion electrophotocatalysis and photocatalysis methods were 97.57% and 58.54% respectively, while the percentage of ion Cd2+ decrease by electrophotocatalysis and photocatalysis 84.7% and 76.3% respectively. Photocatalysis TiO2 by the addition of electric potential can minimize recombination of electron and hole pair that can decolorization Remazol Red RB and decrease Cd2+ ions concentration better than photocatalysis TiO2 without using addition of electric potential.
PEMURNIAN GARAM KROSOK (NaCl) DENGAN PENAMBAHAN (NH4)2CO3-NaOH DAN PAC SEBAGAI BAHAN PENGIKAT IMPURITIES SERTA REKRISTALISASI MODEL SPRAY Solihat, Nissa Nurfajrin; A. Prasetya, Ssi. MSc., Nor Basid; , M.Si., Drs. Gunawan
Chem Info Journal Vol 1, No 2 (2013)
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Garam merupakan kebutuhan pokok manusia yang sampai saat ini belum ada substitusinya. Negara Indonesia masih harus mengimpor garam khususnya untuk keperluan industri karena rendahnya produksi garam yang dihasilkan oleh petani garam dan tidak ada hamparan lahan luas di kawasan pesisir pantai untuk dijadikan ladang garam berskala besar. Oleh karena itu diperlukan cara untuk mengatasi masalah ini. Tujuan penelitian ini adalah untuk memurnikan garam NaCl hasil petani garam agar sesuai dengan standar SNI dan SII untuk industri dengan biaya produksi yang rendah dengan menentukan volume optimum penambahan (NH4)2CO3 dan pengaruh PAC (Poli Alumunium Klorida) terhadap pemurnian garam. Metode yang dilakukan pada penelitian ini dengan cara menambahkan (NH4)2CO3 sebagai bahan pengikat impurities dengan variasi volume 0,8; 1,6; 2,4; 3,2; 4,0 mL lalu flokulan PAC serta penambahan NaOH yang dapat mengendapkan ion pengotor pada garam yaitu ion Ca2+ dan Mg2+, kemudian dilakukan modifikasi rekristalisasi dengan penguapan yaitu dengan model spray. Pada penelitian ini diperoleh kadar NaCl sesuai dengan standar SII dan SNI yaitu kadar air 2,11%; NaCl dengan kemurnian 98,93%; Ca2+ 0,01%; dan Mg2+ 0,09% pada penambahan (NH4)2CO3 20% sebanyak 3,2 mL dan PAC 10 ppm sebanyak 3 mL terhadap 200 mL larutan garam jenuh.
Sintesis Etil Sinamat dari Sinamaldehid pada Minyak Kayu Manis (Cinnamomum cassia) dan Uji Aktivitas sebagai Antidiabetes Amalia, Dian; , S.Si., M.Si., Ngadiwiyana; Fachriyah, M.Si, Dra. Enny
Chem Info Journal Vol 1, No 2 (2013)
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Cinnamon oil is obtained by distillation from the bark of cinnamon. The main component in cinnamon oil is cynnamaldehyde (42-75%). Cynnamaldehyde is a compounds which has aldehyde group that can be modified into the ester group that can be used as an antidiabetic. The synthesis cinnamic esters was oxidation and esterification. This research aims to isolate cynnamaldehyde of cinnamon oil, synthesized cinnamic acid and activities test as antidiabetic. Ethyl cinnamic is obtained from the synthesis of a clear yellow liquid and fragrant with a yield 98.86%. The results of FTIR showed the formation of cinnamic ethyl ester in the presence of CO groups, where as the results obtained by GC-MS abudance of 99.01% ethyl cinnamate. From the antidiabetic test results, ethyl cinnamate coumpounds IC50 values of 215.509 ppm.
PENGARUH PASTA ZnO HASIL SINTESIS DENGAN PENAMBAHAN POLI VINIL ALKOHOL (PVA) DAN DISH DETERGENT TERHADAP EFISIENSI DYE-SENSITIZED SOLAR CELL (DSSC) DARI EKSTRAK BUNGA ROSELA(Hibiscus sabdariffa L.) Pratiwi, Rr. Dian; ,M.Si, Drs. Gunawan; ,M.Si, Khabibi
Chem Info Journal Vol 1, No 2 (2013)
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A study the effects of synthesized ZnO pasta with the addition of poly vinyl alcohol (PVA) and dish detergent on the efficiency of dye-sensitized solar cell (DSSC) of rosella flower extract (Hibiscus sabdariffa L.) had been done. The purpose of this study was to obtain ZnO from the precursor of Zn(CH3COO)2.2H2O with precipitation method as a semiconductor material in DSSC prototype and to determine the influence of synthesized ZnO pasta with poly vinyl alcohol and dish detergent to the dye-sensitized solar cell. The method used in this study with the manufacture of ZnO was by precipitation method using precursor of Zn(CH3COO)2.2H2O. The results obtained were analyzed by XRD, FTIR spectrophotometry, and SEM. ZnO crystals obtained had a size of 25.676 nm and pore size of 71.43 nm. ZnO was then used as a semiconductor in DSSC using dye rosella extract. ZnO pasta was added with variation of binders that attached to the FTO glass using PVA and dish detergent. The efficiencies obtained from each variation was 0.225x10-3% for PVA while 0.138 x10-3% for dish detergent. PVA binder can produce better efficiency of DSSC.
METODE ELEKTROFOTOKATALISIS DAN FOTOKATALISIS DENGAN TiO2 PADA DEKOLORISASI ZAT WARNA REMAZOL BLACK B DAN PENURUNAN KONSENTRASI ION LOGAM Cu2+ SECARA SIMULTAN Herlita, Ita; , M.Si., Drs. Gunawan; Haris, M.Si., Drs. Abdul
Chem Info Journal Vol 1, No 2 (2013)
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Has done research on use electrophotocataysis and photocatalysis methods by using TiO2 for decolorize of remazol black B dye and decrease the concentration of Cu2+metal ion simultaneously. This research was carried out by electrophotocatalysis is electrolyzing sample solution using and TiO2/FTO as anoda and C as cathoda at a potential of 3 volts and for the photocatalysis was done by the addition of 0.1685 grams of TiO2 powder in the sample solution. The two methods in the photocatalys reactor were irradiation with UV-C light and mixtured using 4 rpm for 210 minutes. Sample solution were analyzed by UV-Vis and AAS. The results showed that electrophotocatalysis more effective methods to decolorize dye solution of remazol black B and to decrease the concentration of Cu2+metal ion simultaneously. Decolorization percentage of remazol black B dye with electrophotocatalysis and photocatalysis methods were 98.65% and 31,05%, while the decrease percentage of Cu2+ metal ion concentration were 98.25% and 31,50% respectively.
SINTESIS ISOPROPIL SINAMAT DARI SINAMALDEHID PADA MINYAK KAYU MANIS (Cinnamomum cassia) DAN UJI AKTIVITAS SEBAGAI ANTIDIABETES Anwar, Finalia Femmy; , S.Si., M.Si., Ngadiwiyana; Fachriyah, M.Si, Dra. Enny
Chem Info Journal Vol 1, No 2 (2013)
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Has done research on use of synthesis isopropyl cinnamate of cinnamaldehyde in cinnamon oil (Cinnamomum cassia) and test activities as the antidiabetic. The purpose of this study was to isolate cinnamaldehyde of cinnamon oil, synthesis cinnamic acid, cinnamic isopropyl synthesis and test the antidiabetic activity. The method used in this study by using the method of oxidation and esterification through cinnamoil chloride. Analysis of compounds synthesis was using infra red spectrophotometry, gas chromatography-mass pectroscopy. Activity test of anti-diabetic compounds isopropyl cinnamic was with the measurement of inhibition α-glucosidase activity. Cinnamaldehyde which is isolated from cinnamon oil was yellow orange oil and cinnamaldehyde’s yield   1    was up to 76.41% and its purity was 99.87%. Cinnamaldehyde analysis using of infra red spectrophotometer showed carbonyl vibration at 1676 cm-1, C-H aldehyde at 2813.9 cm-1. From mass spectra, it can be known that cinnamaldehyde had M+ 132. Cinnamic acid which is oxidation was a white solid with yield was up to 41,89%. Cinnamic acid analysis using of infra red spectrophotometer showed O-H ad 3433.29 cm-1. Esterification of cinnamic acid chloride sinamoil through using 2-propanol produces brownish yellow liquid with a yield of as much as 84.62% and its purity was 98.43%. Isopropyl cinnamic analysis using of infra red spectrophotometer showed C-O ester at 1165.00 cm-1 and C-O isopropyl at 1111.10 cm-1. From mass spectra, it can be known that isopropyl cinnamic had M+ 190. At concentrations of 74.219 ppm isopropyl cinnamate synthesis results showed activity as antidiabetic of the enzyme that can inhibit α-glucosidase by 96.94% with IC50 value of 45.42 ppm.
Effect of Milling Time on nanostructured Hydroxyapatite Results Synthesis by Precipitation Method Pratiwi, Sari; Windarti, Tri; Nurhasanah, Iis
Chem Info Journal Vol 1, No 2 (2013)
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A study "Effect of Milling Time on Nanostructured Hydroxyapatite Synthesis Results by Precipitation Method" in purpose to know the effect of milling time on purity, phases and size of hydroxyapatite crystals synthesized. Hydroxyapatite (HA) were synthesized by the method of precipitation by adding dropwise a solution of CaCl2 to a solution of KH2PO 4 which has been conditioned at pH 9 with stirring and heated at 40 °C for 4 hours. The resulting suspension was allowed to stand for 20 hours. Product of precipitation milled using a Planetary Ball Mill at 880 rpm angular velocity and the ratio of powder/ballmill 1:10 with milling time variation 0, 5, 15, 30 and 60 minutes. Based on the FTIR and XRD, it was concluded that the HA produced by milling time of 60 minutes has not been able to achieve high purity. Another type of calcium phosphate formed on the product is calcium hydrogen phosphate anhydrous (CHPA). The longer the milling time, the smaller the size of HA crystals. Size of HA crystals are formed on the nanometer scale is 49.85 nm; 38.30 nm; 34.84 nm; 33.44 nm and 30.44 nm.
METODE ELEKTROFOTOKATALISIS DAN FOTOKATALISIS DENGAN TiO2 PADA DEKOLORISASI REMAZOL GOLDEN YELLOW RNL DAN PENURUNAN KONSENTRASI ION LOGAM Cd2+ SECARA SIMULTAN N.R., Ade Novianti; , M.Si., Drs. Gunawan; Haris, M.Si., Drs. Abdul
Chem Info Journal Vol 1, No 2 (2013)
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Experiments on elektrofotokatalisis using TiO2 on decolorization remazol golden yellow RNL and decreased concentrations of Cd2+ metal ion simultaneously have performed. The purpose of this study was to compare the effectiveness of photocatalytic TiO2 in the form of thin layers of powder that was used to electrophotocatalyzed remazol golden yellow RNL and to reduce the concentration of metal ion of Cd2+. The electrophotokatalysis method use TiO2/FTO working electrode and photocatalytic TiO2 powder for 240 minutes. UV-Vis spectrophotometer was used to determine the absorbance decrease of remazol golden yellow RNL, while atomic absorption spectrophotometer (AAS) was used to determine the decrease concentration of metal ion Cd2+. The results obtained in this study for working electrode TiO2/FTO are more effective to decolorize remazol golden yellow RNL and to decrease the concentration of metal ion Cd2+ compared to the use of TiO2 powder. Electrophotokatalysis using TiO2/FTO working electrode was capable to decolorize remazol golden yellow RNL by 87.9% and to lower the concentration of metal ion of Cd2+ by 82.7%, while the photocatalytic method was only able to decolirize remazol golden yellow RNL by 25.87% and to decrease the concentration of metal ion Cd2+ amounted to 53.2%   
SINTESIS HIDROKSIAPATIT DARI BATU KAPUR ALAM SECARA MEKANOKIMIA DENGAN VARIASI WAKTU PENGGILINGAN Riqti, Frederica Thalita; Windarti, Tri; Sutanto, Heri
Chem Info Journal Vol 1, No 2 (2013)
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A study entitled synthesis of hydroxyapatite from natural limestone with variations mechanochemical milling time. The purpose of this research was to produce hydroxyapatite and to determine the effect of milling time on the purity, phases, and crystallite size on the synthesis of hydroxyapatite from limestone with mechanochemical method. The principle of this method is that the reaction between solids with the help of mechanical energy. Limestone that has been mashed mixed with powdered KH2PO4, mechanochemical process is then performed with the variation of time 0, 70, 80, 90, and 100 minutes. The resulting products were analyzed with FTIR and XRD and calculated by Scherrer equation to determine the crystallite size. Based on XRD and FTIR result, dominant types of calcium phosphate produced in this research were hydroxyapatite (HA) and tetracalcium phosphate (TTCP). Crystallite size of HA was formed on the time variation of 70, 80, 90, and 100 minutes ie 40.66 nm, 39.03 nm, 36.84 nm, and 39.78 nm.
SINTESIS ZEOLIT DARI LIMBAH AMPAS TEBU VARIASI WAKTU KRISTALISASI DAN RASIO Si/Al Riang, Alfonsa Juwita; , S.Si, M.Si., Sriatun; , M.Si., Dra. Taslimah
Chem Info Journal Vol 1, No 2 (2013)
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Zeolite synthesis from bagasse was done in this research. Bagasse camouflage at 550oC for 4 hours, Silica in bagasse ash was extracted by dissolving in NaOH and heated. Sodium silicate mix with sodium aluminate then placed on a Teflon container and heated in an oven for the crystallization process. The study begins with the crystallization time 1,3,5,7 days with Si/Al ratio 50 and continued with the Si/Al ratio 75, and 100 by using the best of the crystallization time.The heating time of 1 and 3 days produced amorphous while the 5 and 7 days of heating time have resulted Zeolite with the best crystallinity of the zeolite in the 7 days of heating. Increasing of Si/Al ratio showed a decrease in crystallinity. Crystallinity of the zeolite with the best results obtained at the time of crystallization of 7 days with a ratio Si/Al 50. The resulting zeolite is Hydrogen Aluminum Silicate (H4Al2Si2O9), and there are mixture of the Sodium Silicate Hydrate (Na2SiO3.9H2O), Sodium Hydrogen Silicate Hydrate (Na2(H2SiO4).7H2O) with consecutive crystal size 340.29 nm; 362.84 nm; 392.21 nm and the comparison of the composition is 39.6%, 39.2%, 21.16%

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