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JKPK (Jurnal Kimia dan Pendidikan Kimia)

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Published by Universitas Sebelas Maret

ISSN : 25034146 EISSN : 25034154 DOI : -

Core Subject : Science, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry

The JKPK (Jurnal Kimia dan Pendidikan Kimia) is a national journal, published three times a year in April, August, and December, containing research articles on Chemistry and Chemistry education.

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Articles 255 Documents

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Sonochemical Synthesis of Ethyl Cinnamate Yuliana Purwaningsih; Mighfar Syukur; Ungsari Rizki Eka Purwanto
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 1 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

This research aimed to determine the yield of ethyl cinnamate synthesized by the sonochemical method and its potency as a sunscreen agent. Ethyl cinnamate was synthesized from cinnamic acid and ethanol with concentrated sulfuric acid as catalysts assisted by ultrasonic waves. The Identification of compounds was carried out by infrared spectrophotometry and gas chromatography-mass spectroscopy. Synthesis of ethyl cinnamate resulted in the form of clear yellow liquid with a fragrant aroma of a cinnamon ester with a 96.61% yield. Identification by an infrared spectrophotometer showed many functional groups of ethyl cinnamate. Identification by GC-MS was given a relative abundance of 98.96%. The product of synthesis had SPF number 4.769 at 10 ppm used Mansur Equation. Based on this research, it concluded that it has potential as a sunscreen agent. The sonochemical method provides an excellent yield of ethyl cinnamate.

The Effect of Calcination Temperature on Cobalt Oxide Species and Performance for Catalytic Ozonation of NH4+ in Water Lina Mahardiani
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 4, No 3 (2019): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Cobalt oxide catalysts can be prepared by impregnation and calcined under different temperature to obtained different species of cobalt oxide, namely CoO(OH), Co3O4, and CoO. Co3O4 was the most appropriate catalyst for decomposing NH4+ with O3 in the presence of Cl– because of relatively high activity, 74%, and high selectivity for gas products, 88%, compared to CoO and CoO(OH). Cl– is necessary to proceed the catalytic ozonation of NH4+ since Cl– participate in the catalytic ozonation mechanism, while SO42– inhibited the process. During the catalytic ozonation of NH4+, Co3O4 showed no deactivation rather than enhanced the catalytic performance after repeated used up to 100% of NH4+ conversion. The Co3O4 can be regenerated by recalcining the catalyst under air at high temperature.

Potential of Water Extract of The White Frangipani (Plumeria acuminate) and Hibiscus (Hibiscus tiliaceus) Leaves Powder as Textile Natural Dyes Sri Mulyani; Kris Siska Aristia; Ardia Putri Sabrina; Afifatul Arfiah; Badrun Niam
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 1 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Synthetic dyes have a high environmental impact, especially on waters. The use of natural dyes for textiles provides new hope for ecological improvement. This article is to find out the yield of water extract of white frangipani (Plumeria acuminate) and hibiscus (Hibiscus tiliaceus) leaves-powder, as well as to find out whether the water extracts have potential as textile natural dyes. Natural dyes must have a good quality of fastness. For this reason, the color fastness tests for washing with a launder meter and colorfastness against rubbing with a crock meter are performed. Colorfastness is assessed by comparing color changes to washing with grayscale and color changes due to staining on fabric with staining scale. The rubbing test is carried out on the wet and dry cloth. Cotton and polyester fabrics are samples that will be colored. Fixers used to bind dyes are Al2(SO4)3, CaCO3, and FeSO4.H2O. The results show that the water extraction of hibiscus and white frangipani leaves powder gave a yield of 11% (w/w) and 27 % (w/w), respectively. The test of colorfastness against washing showed that both water extract of the white frangipani dan hibiscus leaves has a pretty good average quality in staining scale but less in grayscale. The test against rubbing shows that the type of fixer used affects the quality of the colorfastness, but in general, the water extract of white frangipani leaves gives better quality as a potential of natural dye than hibiscus leaves

Application of Calixarene as A Phase Transfer Catalyst in Vanilin Synthesis from Eugenol Suryadi Budi Utomo; Tresni Setiati
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 4, No 3 (2019): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

This study aims to synthesize the compound of C-2,8,14,20-tetradodecylcalix[4]arene-4,6,10,12,16,18,22,14-octol and test it as a phase transfer catalyst. The calixarene compound was prepared by reacting 1,3-dihydroxybenzene with dodecanal under acid-catalyzed. The desired calixarene was then tested for its ability as a phase transfer catalyst for oxidation of isoeugenol with KMnO4 to obtain vanillin products. The results showed that C-2,8,14,20-tetradodecylcalix[4]arene-4,6,10,12,16,18,22,14-octol can be synthesized from 1,3-dihydroxybenzene with a yield of 89.5%. The compound able to work as a phase transfer catalyst which is marked by the oxidation of isoeugenol to produce as much as 12.15% of vanillin. The vanillin product obtained was analyzed by an IR spectrometer that indicating the presence of the most important group namely aldehyde. The results of the analysis with the H-NMR spectrometer showed absorption at 3.9 ppm chemical shift with singlet appearance i.e. protons from –OCH3 (methoxy), uptake in chemical shifts 7.0 and 7.4 ppm with multiplet appearance i.e. protons from aromatic rings, uptake in chemical shifts of 9.8 ppm with singlet appearance i.e. protons from –CHO (aldehyde).

Synthesis of Cinnamic Acid Based on Perkin Reaction Using Sonochemical Method and Its Potential as Photoprotective Agent Erwin Indriyanti; Masitoh Suryaning Prahasiwi
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 1 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Cinnamic acid plays a vital role in the synthesis of other important compounds and as a precursor for the synthesis of commercial cinnamon esters used in perfumery, cosmetics, and pharmaceutical industries. The aim of this research is to synthesize cinnamic acid using sonochemical methods. Cinnamic acid was synthesized using Perkin reaction by reacting 0.05 mole of benzaldehyde with 0.073 mole of acetic acid anhydride and 0.03 mole of sodium acetate as a catalyst in the Erlenmeyer flask and then the mixture was put in a sonicator for 60 minutes at 70 oC. The synthesized compound was tested organoleptic properties, and the melting point was measured. The chemical structure was elucidated using FT-IR, H-NMR, and 13C-NMR. The photoprotective activity was examined from its antioxidant and SPF values. The synthesized compound was found in the form of a shiny white fine crystal which had distinctive odor with a yield of 4.98% and the melting point was found at 133 oC. In the structure elucidation using FT-IR (the aromatic ring absorption at the wave number 1580 cm-1 -1600 cm-1. The wave number 1625 cm-1is an aromatic conjugated alkene group, while wave number 1689.4 cm-1 is a carbonyl group. The wave number 2500 cm-1 – 3250 cm-1 is an OH carboxylic acid group) , H-NMR (7.410 (m, 5H, Ar-H); 7.425(t, 1H); 7.572 (d, 1H); 8.057 (d, 1H,C=CH) and 13C-NMR (129.309 ppm; 130.998 ppm; 134.58 ppm; 170.017 ppm) showed that when compared with the standard compound as the reference, the synthesized compound was confirmed to be cinnamic acid. The antioxidant activity test showed that at the concentration of 20 ppm the synthesized compound was able to reduce free radicals by 46.69%. This finding showed that the synthesized compound had antioxidant activity.

PENGEMBANGAN PERANGKAT PEMBELAJARAN KIMIA SMA KELAS XI MATERI ASAM BASA UNTUK PEMBENTUKAN KARAKTER PESERTA DIDIK Nanang Rahman; Sri Atun
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 1, No 1 (2016): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Tujuan penelitian ini adalah untuk: (1) mengembangkan perangkat pembelajaran kimia SMA kelas XI materi asam basa untuk meningkatkan hasil belajar dan pembentukan karakter peserta didik, (2) mengetahui kualitas dari perangkat pembelajaran yang dikembangkan, dan(3) mengetahui perbedaan hasil belajar dan pembentukan karakter antara peserta didik yang diajarkan menggunakan perangkat hasil pengembangan dengan yang menggunakan perangkat pembelajaran konvensional. Metode penelitian yang digunakan dalam penelitian ini adalah Research and Development (R&D) dengan mengacu pada model 4-D yang memiliki tahapan Define, Design, Develop dan Disseminate. Namun, tahapan Disseminate tidak dilaksanakan. Penelitian ini menghasilkan perangkat pembelajaran yang meliputi: silabus, rencanapelaksanaan pembelajaran, lembar kegiatan peserta didik, dan instrumen penilaian. Berdasarkan hasil penilaian oleh ahli, pendidik, dan teman sejawat, menunjukkan bahwa perangkat pembelajaran yang dikembangkan secara umum memiliki kategori “sangat baik”. Pembelajaran dengan menggunakan perangkat yang dikembangkan peneliti dapat membentuk karakter disiplin, tanggung jawab, kreatif, komunikatif dan teliti. Penggunaan perangkat pembelajaran hasil pengembangan juga dapat meningkatkan hasil belajar peserta didik.Berdasarkan hasil uji-t, maka terdapat perbedaan hasil belajar dan pembentukan karakter peserta didik yang diajarkan dengan perangkat hasil pengembangan dengan yang menggunakan perangkat pembelajaran konvensional.

Synthesis and Characterization of Material LiNi0.8Co0.15Al0.05O2 Using One-Step Co-Precipitation Method for Li-Ion Batteries Cornelius Satria Yudha; Luthfi Mufidatul Hasanah; Soraya Ulfa Muzayanha; Hendri Widiyandari; Agus Purwanto
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 4, No 3 (2019): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Li-ion battery is an energy storage device which could be applied as power source for electronic devices. The capacity of a battery is determined by the cathode material. Over this last decade, high nickel content cathode material is applied for electric vehicular technology. This study aims to synthesize a nickel-rich cathode material, LiNi0.8Co0.15Al0.05O2 (NCA) via one-step co-precipitation and study its characteristics. The Ni, Co and Al metal ion conversion during co-precipitation were analyzed using Atomic Adsorption Spectroscopy (AAS). Based on X-Ray diffraction analysis, NCA sample exhibited hexagonal-layered structure with high crystallinity. Based on Scherrer equation, the mean crystallite diameter of NCA sample is 40 nm. Scanning electron microscope (SEM) showed micron-sized homogenous particles with smooth surface. The final composition of Ni, Co and Al metal were confirmed using XRF. The capacity of the battery was determined using galvanostic test method with voltage range of 2.7-4.25 V using graphite as the counter anode. The initial specific discharge capacity of NCA is 60 mAh/g while the capacity loss per cycle is 1%.

Influence of Upwelling in the Southern Waters of Java on CO2 Concentration in Kototabang, Agam District West Martono Martono; Fanny Aditya Putri
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 1 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Absorption of atmospheric CO2 by the sea through two processes, namely solubility pumps and biological pumps. This study aims to determine the effect of upwelling in the southern waters of Java on atmospheric CO2 concentrations in Kototabang. The data used are in situ CO2 concentration, sea surface temperature and chlorophyll-a concentration from 2004-2016. The method used was descriptive analysis. The results showed that upwelling that occurred during JJA-SON caused a decrease in sea surface temperature to 26.8 °C and 27.1 °C respectively, as well as an increase chlorophyll-a concentration to 2.03 mg/m3 and 2.19 mg/m3. In both seasons CO2 concentration in Kototabang dropped to 385.8 ppm and 385.4 ppm. Meanwhile, when there was no upwelling during DJF-MAM, sea surface temperatures rose to 28.8 °C and 29.0 °C, and chlorophyll-a concentration dropped to 0.32 mg/m3 and 0.54 mg/m3. CO2 concentration in DJF and MAM increased to 386.3 ppm and 386.5 ppm. Based on these results it is known that when upwelling occurs, CO2 concentration decrease and vice versa.

Socratic Questioning Method in The Colloid System Topics Using The Participatory Action Research (PAR) Khusnul Lusi Nursyam Syanas; Sulistyo Saputro; Nurma Yunita Indriyanti; Sri Mulyani
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 4, No 3 (2019): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

The purpose of this research is to identify how lesson plans prepared based on socratic questions can improve critical thinking skills. Research method used is Participatory Action Research (PAR), data collection techniques through interviews and questionnaires. It is expected that the results of the research can be applied in schools specifically to produce lesson plans in colloidal learning integrated with TPACK (Technological Pedagogical Content Knowledge). The results showed the teacher gave a positive assessment of 85% on the socratic questions contained in the lesson plan. This will provide stimulants to students in order to able to argue and practice their critical thinking skills. Postgraduate student participants also gave a positive response of 87.5%. It can be concluded that both teacher participants and postgraduate students agree with the application of socrates questions to students because they have a positive impact on critical thinking skills. Thus, this initial stage of research can proceed to the next stage of PAR research.

The Effect of Mixing Method on Preparing Chitosan-Zeolite-Fe Composites on Fe(III) Release Ratu Fazlia Inda Rahmayani; Yateman Arryanto; Indriana Kartini
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 4, No 3 (2019): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Preparation of an Fe(III) slow-release materials using chitosan and zeolite and evaluation of their release behavior in the 0.33 M citric acid has been done. The composite synthesis was carried out by varying the method of mixing basic ingredients. The first method was done by mixing chitosan gel, zeolite and Fe solution altogether (composite A). The second method was done by mixing chitosan gel with Fe solution and stirring, after that adding zeolite (composite B). The last method was done by interacting zeolite with Fe solution then stirring and then adding chitosan gel (composite C). The structure of the composite was characterized using an infrared spectrophotometer (FTIR), X-Ray diffractometer (XRD), and SEM. Evaluation of release in the citric acid 0.33 M for composite showed that the order of release of Fe(III) from the fastest was chitosan-Fe, composite A, composite B, composite C, zeolite-Fe with values of k are 0.049 mg/g; 0.016 mg/g; 0.015 mg/g; 0.011 mg/g; and 0.006 mg/g, respectively. The SEM images of composite showed rough surface morphology of composites due to the presence of zeolite-Fe which was not coated by the chitosan framework. Thus, it can be concluded that the chitosan-zeolite-Fe composite can be used as a Fe(III) slow-release composite but the variation of mixing method of the materials does no effect on the Fe(III) slow-release properties.

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