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JKPK (Jurnal Kimia dan Pendidikan Kimia)
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.
Arjuna Subject : -
Articles 218 Documents
 16   17   18   19   20 
Characterization of Vanadium-Doped BaBi4Ti4O15 Prepared by Molten KCl Salt Method Suci Noerfaiqotul Himmah; Puspa Sari; Anton Prasetyo
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 1 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i1.58661

Abstract

One of the potential properties of the Aurivillius compound is photocatalyst. The four-layered Aurivillius compound BaBi4Ti4O15 has a bandgap energy of 3.2 eV caused having work function in the UV light area. The strategy to decrease the bandgap energy is doping with metal elements such as vanadium (V). In this research, vanadium-doped BaBi4Ti4O15 (BaBi4Ti4-xVxO15) (x= 0, 0.05, 0.1, and 0.15)) compounds was synthesized through the molten KCl salt method. The diffractogram samples showed that BaBi4Ti4-xVxO15 (x= 0, 0.05, 0.1, 0.15) had been successfully obtained but still found impurities  TiO2 (rutile phase) at x= 0, 0.05, 0.1, 0.15, and Bi4V2O11 at x= 0.15. The SEM image showed that the particle has plate-like morphology. The UV-Vis DRS spectrum showed that vanadium-doped BaBi4Ti4O15 has lower bandgap energy.
The Antibacterial Activity of Liquid Soap supplemented with Extracts combination of Cyperus rotundus L. and Flowers of Plumeria acuminata, Michelia alba, or Cananga odorata Against Staphylococcus aureus and Escherichia coli Bacteria Sri Mulyani; Ari Kusumawardani; Aulia Ageng Pangesti
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 1 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i1.61033

Abstract

Secondary metabolites found in white Frangipani flowers (Plumeria acuminata), white tropical Magnolia flowers (Michelia alba), Ylang flower (Cananga Odorata), and Nutgrass (Cyperus rotundus L.) are thought to be employed as antibacterial active ingredients in detergent. This research aims to create liquid antibacterial soap using an extract mixture of Nutgrass with white Frangipani flower (F1), white tropical Magnolia flower (F2), or Ylang flower (F3). Phytochemical screening tests for the ethanol extracts of Nutgrass and those three flowers, pH tests, total active ingredients tests, and antibacterial activity tests against S. aureus and E. coli bacteria were carried out during the formulation of the liquid soap preparation with the addition of these extracts. The extraction procedure was maceration with a 70% ethanol solvent, yielding extracts of 9.28 percent frangipani flower, 8.12 percent white tropical Magnolia flowers, 9.8 percent Ylang flower, and 8.88 percent Nutgrass. The liquid soap quality testing findings met the established norms (SNI 4085:2017). This research shows that the soap formulas (F0, F1, F2, and F3) can inhibit S. aureus and E. coli germs in antibacterial activity tests using the disc diffusion method. Based on the diameter of the inhibition zone, the antibacterial activity against E. coli of liquid soap with Nutgrass & white tropical Magnolia flower extracts (F2) is not significantly different from liquid soap without extracts (F0). The F2 formula shows to be less effective than both the two liquid soaps containing extracts of Nutgrass & white Frangipani flower (F1) and Nutgrass & Ylang flower (F3). However, the three formulas of liquid soaps (F1, F2, and F3) tend to be more effective in antibacterial activity against S. aureus than a liquid soap that did not contain extracts (F0).
Kepok Banana Peels as Biosorbent for Mercury Sorption from Artificial Wastewater Putri Ade Rahma Yulis; Yelfira Sari
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 1 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i1.56353

Abstract

The present study used adsorbents from Kepok banana peel to remove Hg (II) from artificial wastewater. Kepok banana peels are the most abundant waste from several products bananas processed. One of the ways to reduce that waste is by using it as an adsorbent. This study utilizes the adsorbent from kepok banana peels to remove Hg (II) from artificial wastewater. This is because Hg(II) is a heavy metal that is harmful A previous study showed a high amount of Hg(II) in Kuantan River, one of the River in Riau Province. The effect of initial metal concentration, adsorbent mass, and contact time was investigated to evaluate the maximum removal percentage and adsorption capacity of Kepok banana peels. The adsorption parameters studied were initial Hg (II) concentration [6.84, 7.02,8.38, and 10.05 mg/L],  adsorbent mass [10,20,30 and 40 g], and contact time variations (3,5,7 and 9 hours) where the operating conditions were 250 ml of Hg metal solution was added to each adsorbent. FTIR spectra of adsorbent showed hydroxyl, carboxylic, and amine groups in Kepok banana peels. The adsorption process found that the metal concentration variation under 6.84 mg/L initial Hg (II) concentration conditions gave the highest removal percentage of 99.7 %  and the highest adsorption capacity of 0,0758 mg/g under the condition of 10.05 mg/L  initial Hg (II) concentration. Then at adsorbent mass variation, the highest removal percentage was 94.8 % with 40 grams adsorbent mass, and the highest adsorption capacity was 0.1587 mg/g when using 10 grams adsorbent. The contact time variations gave the highest removal percentage, 95.2 %, and the highest adsorption capacity, 0.0542 mg/g, during contact for 5 hours. This study showed that Kepok banana peels had good potential for removing Hg (II) ions and could be used as a good adsorbent for removing the Hg (II) from wastewater. . 
Formulation and Antioxidant Activity of Peel Off Gel Mask from Paederia Foetida Extract Reny Eka Evi Susanti; Qurrata Ayun
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 1 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i1.45798

Abstract

The peel-Off gel mask is one of the unique characteristic forms of the mask that will form an elastic transparent film layer. It can be removed without rinsing after drying and leaving no residue. The manufacture of masks using natural material is better than synthetic materials as it can cause side effects and damage the natural shape of the skin. One of the natural materials that can be used as a natural ingredient mask is the Paederia Foetida leaf. Paederia Foetida leaf contains antioxidants beneficial as the antidote to free radicals. One of the antioxidants contained in the Paederia Foetida is a flavonoid compound. The research aimed to determine the best concentration of Paederia Foetida leaf extract in the formulation of pell off gel masks with high antioxidant activity. The research method consists of preparing the sample by macerating Paederia Foetida leaf powder using ethanol.  Making peel-off gel mask with variation in concentration from Paederia Foetida leaf extract of 0%, 15%, 20%, 25%, 30%. mask quality test include organoleptic test, pH, Homogeneity, stability, Drying, and dispersibility—antioxidant activity test by using DPPH with expressed as  IC50 concentration. The Result of the research is that Paederia Foetida leaf extract can be formulated into a peel-off gel mask stock. The formulation of a peel-off gel mask with a concentration of Paederia Foetida leaf extract of 20% was chosen because it meets the criteria of peel-off gel mask of Indonesian Nasional Standard  (It is homogeneous and stable, pH 6, spreadability 6,5 cm, and dry time 28 minutes with an IC50 of 167.74 which is a weak antioxidant).
Preparation and Characterization of White Mineral Trioxide Aggregate (WMTA) using Silica from Rice Husk Ash Leny Yuliatun; Nuryono Nuryono; Yuichi Kamiya; Rini Dharmastiti
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 2 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i2.57429

Abstract

The preparation of white mineral trioxide aggregate (WMTA) was carried out using a solid technique using silica (SiO2) from rice husk ash (RHA). The process included extraction of SiO2 from RHA, the effect of SiO2 composition on material characterization and material compressive strength. Silica was extracted from RHA using NaOH and washed with distilled water until it was sodium-free. WMTA was prepared by mixing extracted SiO2, Bi2O3 commercial (18.0%), CaO commercial and Al2O3 commercial (2.0%), and the mixture was heated at various temperatures (900, 1000, 1100 oC). MTA was made from two variation silica sources: RHA and extracted silica, and each source varied at 15, 20, and 25% by weight, while the CaO content was adjusted. Characterization was carried out by FT-IR spectrophotometry, XRD and UTM for compressive strength measurement conducted after cementation for a day. The RHA extraction results were obtained from sodium-free SiO2. The peak showed the success of WMTA preparation at wave number 910 cm-1 in FTIR spectra, indicating the presence of C-S-H and C3S, C2S, and C3A bonds both before and after thermal treatment in XRD data. The highest compressive strength test after cementation for one day (3.21±0.13MPa) was given by WMTA using RHA, heating at 900 oC, and the percentage of CaO and SiO2 were 60% and 20%, respectively.
Metal Ion Complex Compound Fe(III) with Pyrazoline Derivative Ligand as Cd(II) and Zn(II) Heavy Metal Ion Sensor Based on Fluorescence Yulian Syahputri; Ani Iryani; Linda Jati Kusumawardani; Shinta Safitri
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 2 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i2.55419

Abstract

The purpose of this research is to synthesize the complex compound of ion Fe3+ with para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazole-5-yl)benzene ligand and its potentials as the sensor of Cd2+ and Zn2+ heavy metal ions based on fluorescence. Complex compounds are characterized with a Fourier-Transform Infrared (FTIR) Spectrophotometer, Ultraviolet-Visible (UV-Vis) Spectrophotometer and Spectrofluorometer. Then, a complex compound fluorosensor study is conducted by adding Cd2+ and Zn2+ heavy metal ions using a UV-Vis Spectrophotometer and Spectrofluorometer. The results show that the synthesis of the complex compound formed by reacting Fe metal and pyrazoline derived ligands generates brown precipitate with a yield of 51.25% and a range of melting points of  252.2-253.2 . The result of characterization with FTIR (cm-1) generates 3380.20 (tertiary amine), 2922.31-2852.42 (C-H pyridine), 2360.38 (C=C aromatic), 1595.93-1451.88 (C=N), 1232.25-982.66 (C-N pyrazoline), 751.61-690.29 (C-H aromatic) and 366.54-339.44 (Fe-N). The Uv-Vis spectrophotometer study with a concentration of 5x10-5 M showed two absorption peaks at 246 nm, 354 nm, and 440 nm. The resulting fluorescence intensity of 813.1 a.u. at the wavelenght of 500 nm. The study of complex compound fluorescence shows that the addition of Cd2+ heavy metal ion can be made as fluorosensor with turn-on (enhancement) type, while the complex compound in the addition of Zn2+ heavy metal ion can be made as fluorosensor with turn off-on (quenching-enhancement) type.
Biosynthesis of ZnO Nanoparticles using Lime Leaf Extract (Citrus auraantifolia) for Identification of Latent Fingerprints Sri Adelila Sari; Dinda Hawari
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 2 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i2.62090

Abstract

Fingerprints are an identification tool in forensic science because of their unique properties. Unfortunately, some of the chemicals used in fingerprint powders are toxic and pose a potential health hazard. This study was conducted to analyze the ability of ZnO nanoparticles to identify latent fingerprints. ZnO nanopowder was synthesized with lime leaf extract using the green synthesis method with double-distilled water solvent and characterized by FT-IR at a wavenumber of 4000-400 cm-1 and SEM-EDX analysis to provide information about the morphology and to detect the elemental composition nanoparticles. The average particle diameter through SEM was around 173.4 nm and formed a spherical with a rough surface with beige color. Identification of latent fingerprints using the powder dusting method on various porous surfaces (craft paper and greaseproof paper) and non-porous surfaces (glass preparations, aluminium foil, and compact disk) shows visualization with the characteristics of the ridges that look good and clear. The study showed the highest frequency of loops (47%), followed by double loops (20%), plain whorls (30%), and central pocket whorls pattern (3%) from 30 fingerprint samples consisting of 14 men and 16 women. Development identification fingerprints using TiO2 show visualization more clearly because color contrast from bright white color and detail ridges is shown better with ZnO nanopowder.
Highly Selective and Sensitive Determination of Hg(II) Ions Using Ion Selective Electrodes (ISE) Coated with the BEC4ND1 Ionophore as Membranes Nasriadi Dali; Seniwati Dali; Armadi Chairunnas; Hilda Ayu Melvi Amalia; Sri Ayu Andini Puspitasari
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 2 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i2.62213

Abstract

The research on the highly selective and sensitive determination of Hg(II) ions using ion-selective electrodes (ISE) coated with the BEC4ND1 ionophore as a membrane has been successfully carried out. ISE was designed using the membrane composition of the [(BEC4ND1 ionophore : PTCPB : DOS : PVC) (3 : 2 : 60 : 35 % w/w)]. The ESI-BEC4ND1 ionophore has good characteristics where it shows a sensitivity value of 29.933 mV/decade in the Hg(II) ion concentration range of 10-9 - 10-1 M with a limit of detection (LoD) of 10-7 M. The response time obtained is in the range of 4 - 8 minutes with a relative standard deviation (RSD) of 0.548. The ESI-BEC4ND1 ionophore also shows the average value of selectivity coefficient (Kij) < 1. These results indicate that the presence of Zn(II), Cd(II), and Pb(II) ions as interfering ions in the analyte solution does not affect the performance of the ESI-BEC4ND1 ionophore in detecting Hg(II) ions. The ESI-BEC4ND1 ionophore that has been developed shows good selectivity, sensitivity, stability, and reproducibility, so the ESI-BEC4ND1 ionophore is promising to be used as a Hg(II) ion detector in the environment.
Development of Guided Inquiry-Based Electronic Modules and Its Effects on Students' Chemical Literacy Mizwan Amrul Khairi; Jaslin Ikhsan
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 2 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i2.62319

Abstract

One effort to present abstract concepts is the use of learning media. Electronic can provide opportunities for students to learn independently without relying on them. This study aims to determine the feasibility and practicality of guided inquiry-based electronic modules, the difference in students’ chemical literacy abilities in each class, and the effectiveness of learning using guided inquiry-based electronic modules on students’ chemical literacy. This research is a 4D development model consisting of Define, Design, Develop, and Disseminate. This study was conducted at Senior High School 1 Tembilahan Hulu, and the participants were 60 high school students and five chemical teachers, and two validators– data collection in questionnaires and tests. This study used a quasi-experimental method and a post-test-only control group design. The data analysis technique in this research is a descriptive statistical analysis technique of percentages. The results showed that the feasibility of the product assessed by validators showed that the guided inquiry-based electronic module was proper to use in this research. The practicality of the chemistry teacher assessment shows a very good category, the chemical literacy of students who use guided inquiry-based electronic modules in learning is better than students who do not use guided inquiry-based electronic modules in learning. The effectiveness test showed that learning using an electronic module based on guided inquiry scored 0.74 in the medium category.
Synergy of Carbon Nanofiber Innovation from Zinc Oxide Modified Sugar Palm Fiber as Advanced Materials for Arsenic Heavy Metal Waste Remediation Elisabeth Nugrahini; Lina Mahardiani; Ida Setiarini; Wieke Helma Anjelina
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 2 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i2.55969

Abstract

Heavy metal wastes cause water pollution. One of them is very toxic arsenic heavy metal waste; thus, treating them before they are released freely into the waters is necessary. In this case, the manufacture of carbon nanofibers (CNF) from sugar palm fiber waste is an innovation that can produce adsorbents to remediate heavy metals, thereby increasing the use value of sugar palm fiber waste. Carbon nanofiber from palm fiber (Arenga pinnata) was modified with ZnO metal, with varying concentrations of 0.1%, 1%, and 10%, in 1 gram of carbon nanofiber. Carbon nanofibers were made by carbonizing sugar palm fibers at 300oC for two hours. Furthermore, wet impregnation was carried out with Zn(CH3COO)2.2H2O and ended with calcination at 250oC for an hour, resulting in black nanofiber powder. This research was conducted to determine the effect of ZnO concentration on the characteristics of the carbon nanofiber produced and its effectiveness in remediating heavy metal arsenic. The ZnO/carbon nanofiber adsorbent material was then characterized using FTIR, XRD, and SEM analyses. Determination of the absorption of ZnO/carbon nanofibers on heavy metal arsenic was also assessed employing AAS analysis.

Page 18 of 22 | Total Record : 218

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