cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Budhi Oktavia
Contact Email
budhioktavia@fmipa.unp.ac.id
Phone
-
Journal Mail Official
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
Jurnal Periodic Jurusan Kimia UNP
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 343 Documents
 31   32   33   34   35 
Pengaruh Lebar dan Ketebalan Komposit C/CuO Berbasis Karbon Aktif Pelepah Kelapa Sawit Terhadap Karakteristik Material Termoelektrik Novriansyah, Edo; Putra, Ananda; Azhar, Minda; Nizar, Umar Kalmar
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125697

Abstract

Abstract -Electrical energy is energy that is really needed by humans, one way to save electrical energy is to use the thermoelectric method. Thermoelectric materials are materials that can convert heat energy into electrical energy through the Seebeck effect. This research aims to determine the effect of the size of the Active Carbon/Cuo composite material with a high Seebeck coefficient and apply it as a thermoelectric generator. In this study, variations in the size of the mold material were carried out with thickness (0.5 0.8 1 1.3 and 1.5) cm, width (1 1.3 1.6 2.5) and length 5 cm. From the research results, it can be seen that materials with sizes of 0.5 cm and 1 cm have the highest thermal conductivity, namely 0.195 mS.cm-1 and 0.0964 mS.cm-1, the lowest thermal conductivity is 0.06J/s and 0.08J/s, and the highest electrical voltage (Seebeck effect), namely 0.02 mV/K and 0.012 mV/K. Furthermore, applying this material to a generator is capable of producing an electrical voltage of 1.7V at a temperature of 80℃.
Sintesis Tetraetil Ortosilikat (TEOS) dari Silika Hasil Kalsinasi Sekam Padi Rahmi, Rahmi; Nizar, Umar Kalmar; Khair, Miftahul; Althof, Hasnah Sausan; Azzahra, Wenalda Hanifah; Beri, Deski
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125501

Abstract

Indonesia is an agricultural country. Where agriculture makes an important contribution to the economy and the fulfillment of people's basic needs. It is known that every 1 kg of rice produced, is able to produce 0.28 kg of rice husk. Rice husk is an agricultural waste that is abundant in nature. In this research, the effect of calcination time on silica obtained from rice husk has been determined. The purity level of the extracted silica is 99%. Silica that has been successfully extracted is then used in the TEOS synthesis process by varying the reaction time. A total of 1 mole of ethanol (58.4 ml) and 0.25 ml (7 grams) of silica powder were added to 250 ml neck flask 3 and the addition of alumnia catalyst as much as 1 gram, then the mixture was refluxed using 800C for 5, 7, 10, 15 and 20 hours. The TEOS obtained was then subjected to several parameter tests that provide information about the physical and chemical conditions, so that this can provide information regarding the quality of the resulting solution. The measurements carried out are, Densiats solution testing, Viscosity and refractive index. From the data obtained the density value of TEOS is 0.986 g/ml - 0.995 g/ml, the viscosity value of TEOS is 0.8176 cps - 0.9337 cps and the refractive index value of TEOS is 1.356 - 1.360. While the yield obtained is from 82.11% - 54.74%.
Pengaruh Variasi Ukuran Ketebalan Material Terhadap Karakteristik Termoelektrik Sistem C/CuO Sari, Putri Manda; Putra, Ananda; Zainul, Rahadian; Sanjaya, Hary
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125603

Abstract

One of the factors that can affect the quality and characteristics of thermoelectric materials is the size of the material.. This study aims to determine how the effect of material size is varied in width and thickness. The material used is activated carbon obtained from previous research that has met the SNI No. 06-3720-1995 content test. The activated carbon is then composited with Copper (II) Oxide. Based on the tests that have been carried out, the best material obtained is the material with a thickness size variation of 0.5 cm. With a high electrical conductivity value of 0.9507 MΩ-.cm-, low thermal conductivity of 0.1805 J/s and has a high Seebeck coefficient of 0.020 mV/K. Thermoelectricity offers sustainable energy to maintain energy needs, namely by converting wasted heat energy into electrical energy that can overcome the current global warming problem.
Pengaruh Temperatur Kalsinasi pada Sintesis Copper Tin Oxide (CuSnO3) Menggunakan Metode Sol-Gel Fauzi, Muhammad; Sanjaya, Hary; Mawardi, Mawardi; Aini, Syamsi
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125585

Abstract

Synthesis of Copper Tin Oxide (CuSnO3) was carried out using the sol-gel method with varying calcination temperatures (400; 500; 600) oC. The aim of this research is to find out how the calcination temperature affects the synthesis results of the CuSnO3 semiconductor. Then characterization was carried out using the UV-Drs instrument to obtain band gap values and SEM to determine the morphological structure. The CuSnO3 solution was made by dissolving SnCl2.2H2O and CuCl2.2H2O with a molar ratio of 1:1 in 50 mL of methanol solvent and homogenizing then adding 1 mL of the additive Diethylamine (DEA). The gel can be calcined at various temperatures to produce CuSnO3 powder. The research results explain that increasing temperature during calcination can reduce the band gap value of the synthesized CuSnO3 semiconductor material. The surface morphology of CuSnO3 powder at 1000x magnification shows clearly that the surface has cavities (hollows) with a chunk diameter of 7-11 nm.
Sintesis Silikon dari Silika (SiO2) Menggunakan Metode Reduksi Hidrotermal Azzahra, Wenalda Hanifah; Beri, Deski; Aini, Syamsi; Parbuntari, Hesty
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125787

Abstract

Silicon is one of the materials whose utilization is getting bigger along with the times. Hydrothermal reduction method is one of the methods that can be done to synthesize silicon from natural materials because silicon does not exist freely in nature. The purpose of this research is to synthesize silicon using hydrothermal reduction method. The precursor used in the reduction process is silica (SiO2). The metal used as a reductant is magnesium metal and the molten salt that can be used is AlCl3. The reduction process is carried out by varying the reduction temperature to see the degree of crystallinity of silicon formed. Silicon formed is seen at the peak of  28.44, 47.30, 56.11, 69.13 dan 76.38.
Pengaruh Variasi Ukuran Lebar Material Terhadap Karakteristik Termoelektrik Sistem C/CuO Wulandari, Yolanda; Putra, Ananda; Nizar, Umar Kalmar; Riga, Riga
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125757

Abstract

One of the factors that can affect the quality and characteristics of thermoelectric materials is the size of the material.. This study aims to determine how the effect of material size is varied in width and thickness. The material used is activated carbon obtained from previous research that has met the SNI No. 06-3720-1995 content test. The activated carbon is then composited with Copper (II) Oxide. Based on the tests that have been carried out, the best material obtained is the material with a width size variation of 1 cm. With a high electrical conductivity value of 0.0909 MΩ-.cm-, low thermal conductivity of 0.2418 J/s and has a high Seebeck coefficient of 0.0166 mV/K. Thermoelectricity offers sustainable energy to maintain energy needs, namely by converting wasted heat energy into electrical energy that can overcome the current global warming problem.
Pengaruh Ukuran Partikel dan Laju Alir Terhadap Penyerapan Ion Zn(II) Menggunakan Kulit Langsat (Lansium domesticum) sebagai Biosorben Lestari, Kardina; Kurniawati, Desy; Alizar, Alizar; Putra, Ananda
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125515

Abstract

Zn2+ is a harmful ion generated from industrial waste that must be overcome. Zn (II) absorbed in excess conditions can interfere with body health and cause system dysfunction. Metal ion absorption is carried out using langsat fruit peel biosorption. Langsat fruit peel contains active functional groups that have the potential as a binding agent for Zn2+ metal ions. This study aims to determine the optimum conditions for the absorption of Zn2+ ions using langsat fruit peel on the effect of particle size and flow rate on the column. the results showed that the biosorbent was able to absorb Zn ions of 12.2994 mg/g at a particle size of 106 micro and 12.6275 mg/g at a flow rate of 1 ml/min. this shows that langsat fruit peel is one of the best biosorbents in absorbing metals with large absorption capacity data.
Sintesis dan Karakterisasi Silika Berpori dari Natrium Silikat dan Surfaktan Gelatin Kulit Ikan Gabus Channa Striata Erpina, Erpina; Aini, Syamsi; Khair, Miftahul; Ningsih, Sherly Kasuma Warda
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125701

Abstract

Porous silica is a solid silica material for chemical sensors. Porous materials can be divided into 3 categories based on pore size, namely microporous material with pore size less than 2 nm, mesoporous pore between 2 to 50 nm, and macropores with a pore size of more than 50 nm.This research was conducted to synthesize porous silica using sodium silicate with variations of snakehead fish skin gelatin (3% and 4%) using the sol-gel method. Snakehead fish skin gelatin was characterized using FTIR and porous silica was characterized using XRD and SEM. The results of the FTIR test on snakehead fish skin gelatin show that there are indicates that snakehead fish skin gelatin contains amide, carboxyl and carbonyl groups which can interact with sodium silicate. Characterization of porous silica using XRD shows that the resulting porous silica is crystalline. Meanwhile, SEM characterization shows a regular morphology at 4% which has the highest crystallinity and branched tube morphology.
Pengaruh Ukuran Partikel dan Laju Alir Terhadap Biosorpsi Ion Cu(II) Menggunakan Biosorben Kulit Langsat (Lansium domesticum) Hardianti, Amirah Salsabila; Kurniawati, Desy; Etika, Sri Benti; Sanjaya, Hary
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125611

Abstract

Cu2+ ion is a dangerous metal ion produced from various industrial wastes that need to be addressed. Excess and high concentrasions of absorbed Cu2+ ions can disrupt health and ecosystems because they are difficult to degrade and easily accumulate in the body. This study aims to determine the optimum conditions for the absorption of Cu2+ ions using langsat fruit peel on the effect of particle size and flow rate by column method. Adsorption of Cu metal ions with langsat fruit peel biosorbent obtained optimum conditions at adsorbent particle size of 150 micrometers with adsorption capacity of 13,963 mg/g and flow rate of 1 mL/minute with adsorption capacity of 13,442 mg/g. This shows that langsat fruit peel is one of the best biosorbents in absorbing metals with large absorption capacity data.
Sintesis dan Karakterisasi Silika Berpori dari Natrium Silikat dan Gelatin dari Kulit Ikan Lele Clarias gariepinus sebagai Surfaktan Zahran, Jihan Fadhilah; Aini, Syamsi; Riga, Riga; Suryani, Okta
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125705

Abstract

Previous research result on porous silics have obtained fine silica precipitate with a purity of 70,6% and a partticle size of 300-1000 nm. As the application of porous silica increases, research is also developing, one example is mesoporous silica. Mesoporous silica can be used in various fields such as catalysts, drug delivery, adsorption, chromatography and others. This research was conducted to synthesize silica with catfish skin gelatin surfactant. Gelatin was characterized by FTIR to see the functional groups that make up gelatin. The resulting silica was characterized using XRD to determine the crystal structure and SEM to determine the morphology of the silica. The results of the FTIR test on catfish skin gelatin showed 4 absorption areas, namely Amide A, Amide I, Amide II and Amide III. Silica characterization using XRD shows crystalline crystals. Meanwhile, SEM characterization shows regular morphology. SL4% has the highest crystallinity and branched tube shape morphology.

Page 33 of 35 | Total Record : 343

 31   32   33   34   35 

Filter by Year

2012 2025


Reset
Filter By Issues
All Issue Vol 14, No 2 (2025): PERIODIC Vol 13, No 3 (2024): PERIODIC Vol 13, No 2 (2024): PERIODIC Vol 13, No 1 (2024): PERIODIC Vol 12, No 3 (2023): PERIODIC Vol 12, No 2 (2023): PERIODIC Vol 12, No 1 (2023): PERIODIC Vol 11, No 3 (2022): PERIODIC Vol 11, No 2 (2022): PERIODIC Vol 11, No 1 (2022): PERIODIC Vol 10, No 2 (2021): PERIODIC Vol 10, No 1 (2021): PERIODIC Vol 9, No 2 (2020): PERIODIC Vol 9, No 1 (2020): PERIODIC Vol 8, No 2 (2019): PERIODIC Vol 8, No 1 (2019): PERIODIC Vol 5, No 2 (2016) Vol 2, No 2 (2013) Vol 2, No 1 (2013) Vol 1, No 2 (2012) Vol 1, No 1 (2012) More Issue