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Budhi Oktavia
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Jurnal Periodic
Published by Universitas Negeri Padang
ISSN : -     EISSN : 23391197     DOI : https://doi.org/10.24036/p.v11i2.113715
Core Subject : Science, Engineering,
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 231 Documents
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DESAIN DAN KARAKTERISASI SEL SURYA SISTEM ELEKTRODA TEMBAGA (I) OKSIDA (Cu2O/Al) MODEL PIPA PADA LARUTAN NATRIUM SULFAT (Na2SO4) Rahma yulis lubis; Siltiwi Mandar; Rahadian Zainul
Periodic Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (455.295 KB) | DOI: 10.24036/p.v8i1.100628

Abstract

Research has been conducted on "Design and Characterization of Solar Cells for Copper Oxide Electrode System (Cu2O) Model Pipes in Sodium Sulfate Solution (Na2SO4)". Solar cells (photovoltaic cells) are devices that have the ability to convert sunlight energy into electrical energy by applying the principle of photovoltaic. The principle of photovoltaic is defined as a phenomenon of the emergence of electrical voltage due to the contact of two electrodes connected to a solid or liquid system when exposed under sunlight. This study aims to determine the effect of sodium sulfate electolite solution concentration, the effect of measurement time on the generated current, determination of the concentration of solar cells, and the effect of design on electric current. In this solar cell study, the optimum concentration of sodium sulfate was 0.75 M. The measurement time produced power was at 12.00 WIB, then the stability of solar cells on the fifth day and the optimum design of solar cells was in the design 2. The maximum power obtained is 0.12325 mWatt and the electrode ability to produce electricity per area is 49.938412 mWatt / m2 with. The electrode area used is 0.00246804 m2.
DESAIN FOTOTRANSFOMATOR PLAT TEMBAGA (II) OKSIDA CuO PADA ASAM HUMAT Yuni Aulia Putri Djasli; Rahadian Zainul
Periodic Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (641.501 KB) | DOI: 10.24036/p.v8i1.104121

Abstract

This study was conducted using a phototransformator reactor which was used to degrade humic acid with calcined photocatalyst of CuO plate for 1 hour at 4000C. This reactor was designed in hexagonal form made of glass with a thickness of 3 mm, in this reactor filled with 200 mL of humic acid with the help of sunlight. The phototransfomator process is carried out through a process of degradation of humic acid using a reactor which is performed at 1, 2, 3, 4, 5 hours. Absorption of visible light humic acid before and after degradation is 265 nm. The results show that in the outer light the highest value occurs at 2 hours which is 49.70% Keyword : photocatalyst, photransformator, plate CuO, degradation, %Degradation (%D), humic acid
SINTESIS DAN KARAKTERISASI NANO ZnO DOPING CU Siltiwi Mandar; Rahadian Zainul
Periodic Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (268.664 KB) | DOI: 10.24036/p.v8i1.104122

Abstract

The photodegradation process is a combination of photochemical processes with catalysts which are generally semiconductor materials. One of the photocatalysts that is being developed is zinc oxide (ZnO) in nanometer size to optimize the degradation process of organic compounds. Synthesis Nano zinc oxide (ZnO) can use the sol-gel method, the sol-gel method is the best method in making nanoparticles that produce uniform size and high purity. XRD (X-Ray Diffraction) test results show the size of Nano zinc oxide (ZnO) which is 27 nm. Nano zinc oxide (ZnO) has a band band 3.37 eV so that it is less suitable to be applied to visible light. Therefore it is necessary to do coupling with other metals such as Cu. The results of Nano zinc oxide (ZnO) doped Cu 7% have a low band gap of 2.57 eV so that it is easy to excite valence band electrons to the conduction band.
Pembuatan Lapis Tipis TiO2 pada Keramik Dengan Metode Dip Coating untuk Asam Humat Rohadatul Nadya Maurani; Rahadian Zainul
Periodic Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (177.723 KB) | DOI: 10.24036/p.v8i1.104123

Abstract

TiO2 thin layer on ceramic with dip coating method and photocatalyst activity test in humic acid. One of the photocatalysts used for the degradation of humic acid is TiO2, because TiO2 has several advantages, including non-toxic, stable, high activity, relatively cheap and environmentally friendlyThis study was performed using TTIP as a precursor and MEA as an additive in isopropanol. Addition of MEA influences the stability of the titanium solution. Ceramics were coated in a 0.5 M TiO2 solution by a dip coating method, then dried in an oven at 110°C for 10 minutes and furnace at 400°C for 2 hours. The maximum degradation of humic acid during 24 hours is 57.73% and in the form of 3.76% using an 8-watt UV lamp.
Fototransformator Asam Humat menggunakan Semikonduktor TiO2 Doping Cu Rahma Zila; Rahadian Zainul
Periodic Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (429.074 KB) | DOI: 10.24036/p.v8i1.104128

Abstract

Synthesis of Cu doping TiO2 was carried out by sol-gel method, Cu concentration used was 5% calcined at 4000C then characterized by XRD then applied to degrade humic acid using a variation of hours ie 1 to 5 hours, optimum decrease in humic acid occurred at 3 hour which is 52.21%.
Efek Variasi Plat Elektroda Cu/Al Pada Generator Hidrogen Sri Wahyu Wardani; Rahadian Zainul
Periodic Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (113.37 KB) | DOI: 10.24036/p.v8i1.104874

Abstract

Penelitian ini bertujuan untuk mengetahui efek varisi plat elektroda pada produksi gas hidrogen menggunakan metode elektrolisis. Pada elektrolisis ini digunakan arus dan tegangan tetap sebesar 0.6 Amper dan 2 volt selama 1 jam. Hasil yang didapatkan yaitu reaksi elektroisis terjadi pada plat 8 menggunakan elektrolit aquades, CH3COONa 0,01 M dan NH4Cl 0,01 M  dengan hasil 6 mL, 144 mL, dan 112 mL. Kemampuan petransferan elektron pada setiap elektrolit berkurang pada lapisan plat yang lebih tebal karena tegangan yang digunakan sangat kecil.Keyword : Elektrolisis, Cu-Al, Elektrolit, Arus, Tegangan
IDENTIFIKASI FRAGMEN GEN 16S rRNA BAKTERI ASAM LAKTAT UBC-DA-08 DARI DADIH Ike Ramadhanty Daniel; MInda Azhar
Periodic Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (818.721 KB) | DOI: 10.24036/p.v8i1.104886

Abstract

Bacterial identification can be done by phenotypically and genotypes use the 16S rRNA gene. This study aims to determine the species of lactic acid bacteria isolates in Dadih. The first step of identification of bacteria by screening and isolating lactic acid bacteria found in Dadih, then isolate the bacterial isolate chromosome DNA from screening (UBC-DA-08).Bacterial chromosome DNA was used as a template for amplification of the 16S rRNA gene using the PCR method.Amplikon was electrophoresed using agarose gel and purified for sequencing.Sequencing of the 16S rRNA gene was carried out using the Dideoxy-Sanger method.Sequencing bases of nucleotide sequences were analyzed using the DNAStarprogram.The 16S rRNAgene size ofthe UBC-DA-08 bacterial isolate consisted of  896 bp (base pair).The nucleotide sequence of the 16S rRNA gene can be read using the BLASTn andMEGA programs.The results of  identification of  UBC-DA-08 bacterial isolates were lactic acid bacteria including the Lactococcuslactis groupKeyword :Dadih, Lactic Acid Bacteria, Gene 16S rRNABacterial identification can be done by phenotypically and genotypes use the 16S rRNA gene. This study aims to determine the species of lactic acid bacteria isolates in Dadih. The first step of identification of bacteria by screening and isolating lactic acid bacteria found in Dadih, then isolate the bacterial isolate chromosome DNA from screening (UBC-DA-08).Bacterial chromosome DNA was used as a template for amplification of the 16S rRNA gene using the PCR method.Amplikon was electrophoresed using agarose gel and purified for sequencing.Sequencing of the 16S rRNA gene was carried out using the Dideoxy-Sanger method.Sequencing bases of nucleotide sequences were analyzed using the DNAStarprogram.The 16S rRNAgene size ofthe UBC-DA-08 bacterial isolate consisted of  896 bp (base pair).The nucleotide sequence of the 16S rRNA gene can be read using the BLASTn andMEGA programs.The results of  identification of  UBC-DA-08 bacterial isolates were lactic acid bacteria including the Lactococcuslactis group. Keyword :Dadih, Lactic Acid Bacteria, Gene 16S rRNA
Potensi Na2SiO3 yang disintesis dari Batu Tuff sebagai bahan dasar Sintesis Silika Mesopori Muhammad Iqbal Alzain; Syamsi Aini; Ridha Santika
Periodic Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (973.455 KB) | DOI: 10.24036/p.v8i1.104928

Abstract

Mesoporous silica was synthesized using sodium silicate obtained from tuff stones Indarung hills in Padang, Indonesia. Mesoporous silica was synthesized  from sodium silicate and P104 as surfactant in acid condition. The result from characterization using spectrofottometer Fourier Transform Infrared (FTIR) are shown wavelength at 806 cm-1, 1058 cm-1, 1647 cm-1, and 3476 cm-1 that indicates mesoporous silica.  FTIR data were strengthened using XRD with a wide and low diffractogram at 2θ=22°. The results show that tuff stones have potential  to be used  as a precrusor for synthesis mesoporous silica.
Kajian pH untuk Sintesis Silika Mesopori pada Permukaan Campuran Nanopartikel Magnet Fe3O4 dan Fe2O3 dari Pasir Besi dan Sodium Silikat Nadia Rahma; Syamsi Aini
Periodic Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (570.832 KB) | DOI: 10.24036/p.v8i1.104967

Abstract

Abstrak - Nanopartikel Fe3O4 dari pasir besi merupakan salah satu partikel magnetik memiliki karakteristik yang menarik seperti sifat kemagnetan, optis dan katalitiknya, serta banyak digunakan dalam berbagai aplikasi antara lain magnetic resonance imaging (MRI), pemisah logam berat untuk pemurnian air, hypertemia theraphy system. Namun, nanopartikel besi tidak stabil bila digunakan langsung sebagai katalis, hingga perlu penstabil silika. Sintesis SiO2 pada permukaan Campuran nanopartikel Fe3O4 dan Fe2O3 dilakukan dengan menggunakan nanopartikel Fe3O4 hasil dari pasir besi Sijunjung. Sintesis SiO2 pada permukaan  Campuran nanopartikel Fe3O4dan Fe2O3  dilakukan menggunakan metode Sol-Gel. Sintesis dilakukan untuk mengkaji pengaruh pH (7, 9 dan 11) terhadap keberadaan silika mesopori pada permukaan nanopartikel magnet Fe3O4@SiO2. Senyawa hasil dikarakterisasi menggunakan XRD (X-Ray Diffraction). Keberadaan silika pada permukaan campuran nanopartikel  Fe3O4 dan Fe2O3 mulai teramati pada kondisi pH 11  ditunjukkan dengan adanya puncak lebar dan rendah pada 2θ = 26.  Kata Kunci - Nanopartikel Fe3O4, Fe2O3  dan Silika Mesopori,
MAKING DYE SENSITIZED SOLAR CELL (DSSC) USING GMR AS SUBSTRACT AND MANGOSTEEN SKIN EXTRACT (Garcinia Mangostana L) AS A DYE SENSITIZER Dina Wirdatul Ummah; Hary Sanjaya
Periodic Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (293.127 KB) | DOI: 10.24036/p.v8i1.105059

Abstract

The aim of this is to determine the efficiency of DSSC by using GMR as a substrat with mangosteen skin s a dyes. Mangosteen skin contains of anthocyanin pigmentd. Based on the light absorption test of mangosteen peel extract dyes it is known that the spectrum of mangosteen peel can absorb light at the maximum 510 nm wavelength with absorbance of 2.8873 A. The results of the conversion of sunlight into electrical energy obtained the highest value at 50% concentration of 0.281%. Whereas at 5 hours time variation that is equal to 1.053% because ZnO paste is soaked for 5 hours with coloring and drops of liquid electrolyte.

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