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Jurnal Periodic Jurusan Kimia UNP

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Published by Universitas Negeri Padang

ISSN : - EISSN : 23391197 DOI : https://doi.org/10.24036/p.v11i2.113715

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

Periodic adalah jurnal nasional yang berisi artikel-artikel bidang ilmu kimia, seperti bidang Kimia Analitik, Kimia Fisika, Kimia Anorganik, Kimia Organik dan Biokimia. Jurnal ini mempublikasikan hasil penelitian original, komunikasi singkat, dan artikel review. Artikel yang telah diterbitkan dalam jurnal ini berarti bahwa kegiatan penelitian yang diterbitkan adalah belum, dan tidak akan diterbitkan di tempat lain. Periodic (e-ISSN 2339-1197) diterbitkan oleh Jurusan Kimia dan mulai tahun 2022 disebut Departemen Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Padang, Indonesia. Periodic terbit berdasarkan berdasarkan surat edaran Direktorat Jenderal Pendidikan Tinggi No. 152/E/T/2012 tentang publikasi karya tulis ilmiah dan terbit sejak Oktober 2012.

Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)

Articles 343 Documents

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Degradasi Zat Warna Methanil Yellow Menggunakan Metoda Fotosonolisis dengan Bantuan Katalis ZnO Reska Putri; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Research that has been carried out on the photosonolysis degradation of methanyl yellow using a ZnO catalyst aims to determine the effect of radiation time on the degradation of methanyl yellow. The degradation time is about 30 to 150 minutes using a ZnO catalyst. The measurement results of the Uv- Vis spectrophotometer were obtained at a wavelength of 437nm. In the variation of the degradation time, the highest result was obtained at 60 minutes which was 76,11 %. This study showed that the hydroxyl radical (∙OH) was the main control in degrading methanil yellow

Pengaruh pH dan Konsentrasi Pada Penyerapan Ion Logam Cr(VI) Menggunakan Karbon Aktif Kulit Durian Chairunnisa Chairunnisa; Edi Nasra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Metal ions Cr (VI) are a type of toxic heavy metal that can cause environmental pollution. Chromium limits exceeding 0.1 mg/L in the water will cause damage to ecosystems and living things within them. Adsorption using activated carbon durian shell was chosen as one of the most efficient methods. Used adsorbent activated carbon durian shell that aims to know the quality of activated carbon durian shell and determine the optimum condition of absorption and optimum capacity of absorption of metal ions Cr (VI). The reaction between orange chromium ions with the addition of H2SO4 and colorless diphenylcarbazide forms a purple solution complex. Maximum wavelength absorption is obtained at 542 nm. The results were obtained with the capacity of immersion in optimum conditions to the absorption of metal ions Cr (VI) at pH 2 and Concentration 360 mg/L with an absorption capacity of 40,3190 mg/g. The study of adsorption isoterm refers more to the freundlich equation approach with a regression coefficient value approaching 1 (R2= 0,9684).

Pengaruh Penambahan Konsentrasi (NH2)2CO Terhadap Karakteristik TiO2 dan Aktifitas Fotokatalitiknya Dalam Mendegradasi Methylene Blue Novera Elsi Mudia; Rahadian Zainul; Deski Beri; Syamsi Aini
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Titanium dioxide (TiO2) is a semiconductor material that is often applied as a photocatalyst. TiO2 has a band gap of 3.20 eV which is less effective when used in visible light. Nitrogen dopants are dopants that have high effectiveness to improve the performance of TiO2 in the visible light region. This study aims to determine the effect of adding nitrogen dopant concentration on the characteristics of TiO2 and its photocatalytic activity in degrading methylene blue. The photocatalytic activity of TiO2-N was tested with 10 ppm methylene blue under sunlight for 1 hour. The addition of dopants to the TiO2 matrix has an effect on the band gap and photocatalytic activity of TiO2

Sintesis dan Karakterisasi Zat Warna Kuning Goethite (α-FeOOH) berbahan Pasir Besi Alam Athahirah Athahirah; Syamsi Aini
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Goethite yellow dye (α-FeOOH) is an inorganic synthesis product with natural iron sand as the basic material. Pure natural iron sand contains magnetic particles oxidized to produce Fe3+ ions which can be used as starting materials for FeOOH compounds. Synthesis was carried out by coprecipitation method with NaHCO3 as coprecipitation agent. The variation of the mass of iron sand is aimed at knowing the optimal comparison of the use of iron sand, H2SO4, and HNO3. The optimum ratio obtained between the mass of iron sand, H2SO4 and HNO3 is 3:10:10. Variations of pH synthesis were carried out at pH 2, 3, 4, 5 and 6 to produce a yellow color with different brightness. The pH causes the yellow color to get darker. The brightest yellow color was obtained at pH 2 synthesis. Characterization was carried out with DRUV-Vis to see the absorption wavelength, FTIR spectrophotometer to see the product's functional groups and XRD to see the crystal structure of the product.

Pengaruh Konsentrasi Inisiator terhadap Pembentukan Poli Tanin sebagai Zat Warna Pada Dye Sensitized Solar Cell (DSSC) Widi Feronika; Hardeli Hardeli
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i1.113260

Dye Sentized Solar Cell (DSSC) is a third generation solar cell that uses dyes to absorb photons from sunlight which will be converted into electrical energy. This research aims to produce a high efficiency of the dye used. The dye in DSSC must have a large number of double bonds to absorb photons because the more photons that are converted into electrical energy, the higher the resulting efficiency. Polymerization is one of the methods used to increase π bonding in dyes. Polimerization is the combination of several monomers. The monomer used in this research is tannin. Tanin are organic compounds that have double bonds.Tannin polymerization uses a crosslinked agent glutaraldehyde to produce polytannin which are used for staining in DSSC. The assembled DSSC will be tested for resistance and voltage using a digital multimeter. Dye will be characterized using FT-IR, the results of the FT-IR test are carried out to confirm the formation of polytannins which are characterized by the presence of metylene groups formed. The efficiency obtained is higher than that the of the unpolymerized tannin dye , which is 7,3% efficiency.

Efektivitas Penggunaan Al(OH)3 Sebagai Coprecipitant Pada Analisa Besi (Fe2+) Dela Gustika; Edi Nasra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

The concentration of metals in the water is generally very small, so it is difficult to determine by AAS. For this reason, before measuring with AAS, it is necessary to do pretreatment. One of the pretreatment that are commonly used to determine metal concentrations at low concentrations is coprecipitation, where this method is one of the pre-concentration methods. Preconcentration is a concentration technique used when the available sample has a very low concentration. There are several methods of preconcentration, one of which is the coprecipitation method. In this study, the coprecipitation method was used to analyze the metal content of Fe2+ in very small concentrations which would later be measured using an atomic absorption spectrophotometer. The purpose of this study was to determine the optimum conditions of coprecipitation of Fe2+ metal ions using Al(OH)3 as coprecipitant. The result obtained in this study were, the optimum conditions for Fe2+ metal ion coprecipitations occured at pH 9, Al3+ concentration 0,2 M, and the long deposition time occurred at 15 hours.

Degradasi Asam Humat Dengan Katalis TiO2/N Menggunakan Cahaya Matahari Syifa Rahma Ayunda; Rahadian Zainul; Budhi Oktavia; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Humic acid is a heterogeneous molecule of organic substance present in a peat water, which is carcinogenic is difficult to degrade. This study aims to degrade humic acid using the photocatalyst method is an environmentally friendly method. The photocatalyst used was TiO2 doped Nitrogen 8%. This study used reactor mobile hexagonal with variations in stirring speed, namely 500, 1000 rpm, and without stir with an irradiation time of 1 to 3 hours. Result of degradation analyzed using UV-Vis spectrophotometer. The degradation results obtained using strirring have a higher percentage of degradation than without strirring. The maximum degradation percentage obtained in this study was 76,27% with 500 rpm strirrings at 2 hours irradiation.

Pengaruh Ukuran Partikel dan Kecepatan Pengadukan Terhadap Penyerapan Fenol Menggunakan Biosorben Kulit Kelengkeng (Dimocarpus longan Lour) Satrio Prinandito; Desy Kurniawati; Alizar Alizar; Edi Nasra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Industry produces phenol liquid waste that pollute the environmental. Phenol is a dangerous organic compound that has hight toxicity so that the presence of phenol in the environment will disrupt the surrounding ecosystem and have an impact on human health. To overcome the problem of environmental pollution, an adsorption method is used by utilizing longan skin as an adsorbent. Lengkeng shell is used as an adsorben able to bind phenol in the environment because it has several active groups such as amines, hydroxyl, carbonyl, and carboxyl which can form hydrogen banding with phenol solution. The purpose of this study was to determine the optimum conditions with variation in adsorbent particel sizes of 106, 150, 250, and 425 mm and stirring speeds of 50, 100, 150, 200, and 250 rpm. Phenol was analyzed using UV-Vis spectrophotometer (Specord 210). Adsorption phenol with lengkeng shell biosorbent obtained optimum conditions at an adsorbent particle size of 106 with adsorption capacity of 4.583 mg/g and stirring speed of 200 rpm with adsorption capacity of 4.200 mg/g.

Pengaruh Mol K3Fe(CN)6 pada Sintesis Zat Warna Biru Prusia berbahan Pasir Besi Muara Pantai Sunur Pariaman Nafis Sudirman; Syamsi Aini
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

The aim of the study was to determine the effect of moles of K3Fe(CN)6 on the Prussian blue color, to obtain the optimum synthesis conditions. Coprecipitation and centrifugation methods for separating pigments from solvents. Fe3O4 was reacted with 96% H2SO4 to obtain Fe2+ ions, then reacted with K3Fe(CN)6, producing Prussian Blue. This study varied 3 samples of K3Fe(CN)6, the variation results were referred to as M1, M2 and M3. In sample M1, 3.037 mmol K3Fe(CN)6 was reacted at 30.37 mM. For sample M2, 9.87 mmol K3Fe(CN)6 30.37 mM was reacted with 4.56 mmol FeSO4 0.018 mM, 250 mL. In sample M3, reacted with 12.21 mmol K3Fe(CN)6 30.37 mM. In the variation of K3Fe(CN)6, the optimum is in the M2 sample. The maximum UV-Vis absorbance of M2 products is at 747 nm, according to the standard absorbance wavelength of Prussian Blue (680-740 nm), and the absorbance is relatively high.Keywords — iron sand, potassium ferricyanide, prussian blue, pigment

Pengaruh Penambahan Cetyltrimethylammonium Bromide (CTAB) pada Silika dari Natrium Silikat (Na2SiO3) Habibur Rahman Dafnaz; Budhi Oktavia; Hardeli Hardeli; Umar Kalmar Nizar
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i1.113765

Silica is a useful material in adsorption, electronics, mechanical, medical, art to other fields. In this study, Sodium silicate is used which can be used as a more economical precursor of silica as which is produced from natural silica. Silica was synthesized using the sol-gel method. This study aims to determine the effect of adding CTAB mass and aging time in synthesizing silica. The synthesized silica was tested for iodine absorption value and characterized using FTIR. Based on the iodine absorption of variations in adding mass CTAB (0,1, 0,15, 0,2, 0,25, and 0,3 gram) and aging time (8, 12, 16, 20 and 24 hours) give the most absorption to optimum conditions of adding mass CTAB at 0,2 gram and aging time at 16 hours. The results of measurements with FTIR showed the presence of absorption bands which indicated the loss of CTAB in the synthesized silica.

Page 18 of 35 | Total Record : 343

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Contact Name
Budhi Oktavia

Contact Email
budhioktavia@fmipa.unp.ac.id

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periodic@fmipa.unp.ac.id

Editorial Address
Departemen Kimia, FMIPA, UNP Jalan Prof. Dr. Hamka, Air Tawar, Padang, Sumatera Barat

Location
Kota padang,

Sumatera barat

INDONESIA