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All Journal Jurnal Pendidikan Kimia Indonesia Lantanida Journal JURNAL PENDIDIKAN MIPA KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Jurnal Kajian Pendidikan IPA Bulletin of Chemical Reaction Engineering & Catalysis Journal of The Indonesian Society of Integrated Chemistry al Kimiya : Jurnal Ilmu Kimia dan Terapan
Sunarya, Risa Rahmawati
Department Of Chemistry Education, UIN Sunan Gunung Djati Bandung
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Mathematics Social Sciences Other

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Preparation of Polyaniline Emeraldine Salt for Conducting-Polymer-Activated Counter Electrode in Dye Sensitized Solar Cell (DSSC) using Rapid-Mixing Polymerization at Various Temperature Auliya Nur Amalina; Veinardi Suendo; Muhammad Reza; Phutri Milana; Risa Rahmawati Sunarya; Damar Rastri Adhika; Viny Veronika Tanuwijaya
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 3 Year 2019 (December 2019)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.14.3.3854.521-528

Abstract

Polyaniline Emeraldine Salt (PANI ES) as a conductive polymer has been used as a Pt-free counter electrode materials in DSSC. In this study, polymerization temperature was varied at relatively high temperature from 308 to 348 K with respect to the standard low polymerization temperature at 273 K. The synthesis held in varied high-temperature to study the effect of synthesis condition resulted to the performance as counter electrode in DSSC. The effect of high-temperature synthesis condition gives interesting results, the FTIR-ATR spectra show the presence of vibrational modes of phenazine structure obtained at high polymerization temperature, indicate the changing in the chain geometry. Raman Spectroscopy shows the decrease of the I1194/I1623 intensity ratio that can be interpreted that the degree-of-freedom of C-H bond bending mode decreases in the benzenoid ring, while the stretching mode degree-of-freedom along the chain is preserved or increased. The electrical conductivity profile has changed from metal-like at low-temperature into a semiconductor-like profile at high-temperature. Scanning Electron Microscope images reveals that a change in the morphology of PANI ES with temperature. At low-temperature (273 K) the morphology has a globular shape, while at high-temperature it tends to form nanorod structure. DSSC device with highest efficiency is attained for PANI ES polymerized at 273 K (1.91%) due to its high conductivity. The lowest efficiency is observed in device using PANI ES synthesized at 328 K (1.15%) due to its low conductivity due to the formation of phenazine structure. 
Implementation of Problem Solving-Based Electron Configuration E-Modules to Improve Student Learning Outcomes Sunarya, Risa Rahmawati; Hijriansyah, Reza; Aisyah, Riri
Jurnal Pendidikan Kimia Indonesia Vol. 8 No. 1 (2024)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jpki.v8i1.70029

Abstract

This research aims to analyze the improvement in student learning outcomes in the application of the problem-solving-based electron configuration e-module. The true-experiment method with a pretest-posttest design was used in this research so that learning outcomes from the control class and the experimental class could be compared. The research results show that during the process of implementing the e-module, student activities went very well. At the stages of analyzing problems, making hypotheses, collecting data, testing hypotheses, and making conclusions respectively, students got an average score of 84.25; 82.5; 80.5; 100; and 89.5. The statistical test of student learning outcomes in the control class and experimental class using the Mann-Withney U test shows a significance value of 0.013 so it can be concluded that there is a significant difference between student learning outcomes with the application of e-modules and without the application of e-modules in learning.
The Effect of pH and Temperature on The Stability of Anthocyanins from Black Soybean Skin Extracts Sunarya, Risa Rahmawati; Subarkah, Cucu Zenab; Purliantoro, Dwi; Taskinih, Taskinih; Islamiati, Fitri Nur
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 11, No 1 (2024): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v11i1.35861

Abstract

Anthocyanins are natural dyes of purple and red. Anthocyanin dyes are applied in various industries as a drink or food coloring. As natural dyes, anthocyanins have an important role in human health. This research aimed to analyze the stability of anthocyanins from black soybean skin extract at varying pH and temperature. Anthocyanins from black soybean skins are macerated using two kinds of solvents. The solvents are distilled water + 30% citric acid and 70% ethanol + 1% HCl. Maceration was carried out at a temperature of 4℃. Then the anthocyanin was treated at a temperature range of 40-90℃ and pH of 5-9 and its absorbance was measured using UV-Vis’s spectrometry. The concentration of anthocyanin from black soybean skins is from the solvent distilled water + 30% citric acid of 1.992 mg/L, while from the solvent 70% ethanol + 1% HCl it was 1.936 mg/L. The color stability temperature t of black soybean skin extract was carried out at temperatures of 40°C, 50°C, 60°C, 70°C, 80°C, and 90°C. with respective absorbance of 0.274; 0.247; 0.237; 0.227; and 0.214. The higher the temperature, the anthocyanin content decreases. pH test was carried out at pH 5, 6, 7, 8, and 9 with respective absorbance values of 1.831; 1,759; 1,229; 1,118; and 1,066. The pH test showed that the higher the pH, the anthocyanin content was reduced, while the application of additional anthocyanin to white agar as food coloring showed that the anthocyanin content was only 0.125. It can be concluded that anthocyanins have good stability at low temperatures and acidic pH.
SOCIOSCIENTIFIC ISSUES AS A PEDAGOGICAL APPROACH TO FOSTER SCIENTIFIC ARGUMENTATION IN BIOPLASTIC PRODUCTION USING SUGARCANE BAGASSE Salsafitri, Medina Fasya; Sunarya, Risa Rahmawati; Helsy, Imelda; Dahriah, Iis
Lantanida Journal Vol 13 No 1 (2025): January-June 2025
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/0jje1904

Abstract

This study aims to develop students’ scientific argumentation through the implementation of socioscientific issues-based learning in the production of bioplastics from sugarcane bagasse (Saccharum officinarum). The method employed is pre-experimental with a one-shot case study design. The research subjects consisted of 36 eleventh-grade students from the Industrial Chemistry program at a vocational high school (SMK) in Cimahi City. The research instruments included student activity observation sheets, student worksheets, argumentation debates, and scientific argumentation tests. Students’ activities during the learning process showed excellent results, with an average score of 94. Meanwhile, their ability to complete the student worksheets achieved an average score of 98, both falling into the “very good” category. The majority of students’ oral argumentation was at level 2, which includes a claim supported by evidence without rebuttal. In contrast, the development of students’ written scientific argumentation after the implementation of socioscientific issues was at quality level 3, characterized by arguments that include weak rebuttals. These findings indicate that socioscientific issues-based learning can be effective in developing students’ scientific argumentation, although further instruction is needed to enhance students’ ability to present stronger, evidence-based rebuttals.
THE IMPLEMENTATION OF PROJECT-BASED WORKSHEETS TO DEVELOP STUDENTS’ SCIENTIFIC PERFORMANCE THROUGH EDIBLE FILM PRODUCTION Khoirunnisa, Kuntum Salsabilla; Sunarya, Risa Rahmawati; Sukmawardani, Yulia; Sari, Sari
KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Vol 8 No 1 (2025): Jurnal Katalis Vol. 8 No. 1 Tahun 2025
Publisher : Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/katalis.v8i1.11836

Abstract

The low scientific performance of students in learning chemistry is one of the main problems in education, mainly because the learning approach is still dominated by conventional methods and teacher-centered. Learning that does not actively involve students can hinder the development of critical thinking skills, problem solving, and students' scientific performance abilities. This study aims to develop students' scientific performance through the application of project-based worksheets in making edible film from jackfruit seed waste (Artocarpus heterophyllus). The research used a quantitative approach through the application of pre-experimental methods with a one-shot case study design involving 34 students of class XI majoring in Industrial Chemistry at one of the vocational high schools (SMK) in Cimahi City. The research instruments consisted of student activity observation sheets, project-based worksheets, and scientific performance assessment sheets. The results showed that student activity during learning obtained an average score of 97, worksheet work achieved an average score of 94, and student scientific performance of 92, each categorized as very good. These findings prove that the use of project-based worksheets can develop students' activeness, independence, and scientific abilities, and become an alternative solution to the problem of passive science learning in schools.
Development of a Guided Inquiry-Based Experimental Design for the Synthesis of GO-PANI from Coconut Shell Charcoal Nurfadilah, Lutfina; Sunarya, Risa Rahmawati; Nurhayati; Irwansyah, Ferli Septi; Sari, Sari
Jurnal Kajian Pendidikan IPA Vol 5 No 2 (2025): Jurnal Kajian Pendidikan IPA
Publisher : Universitas Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52434/jkpi.v5i2.42652

Abstract

This study aims to develop an experimental design based on guided inquiry for the synthesis of GO–PANI composites derived from coconut shell charcoal, packaged in a Student Worksheet. The development follows the Research and Development (R&D) model, consisting of three main stages: preliminary study, research, and instructional material development. Preliminary studies analyze the needs through syllabus and journals.  The study was in the form of a preliminary test in the laboratory in the synthesis of graphic oxide (GO) with a modified Hummers method, then composed with polyanilin through in situ polymerization.  Development of teaching devices in the form of experimental and student worksheet designs. The student worksheet was structured according to guided inquiry phases: orientation to the problem, problem formulation, planning and conducting experiments, data analysis, and drawing conclusions. Validation by three experts indicated that the experimental design and student worksheet were rated highly valid, with an average r value of 0.94. A feasibility test involving ten students showed very positive responses, with an average feasibility score of 92.2%. The success of the experimental design is reflected in its ability to integrate locally sourced biomass-based material synthesis with a contextual and applicable guided inquiry approach. In addition, characterization of the synthesized products using FTIR and SEM confirmed the successful formation of the GO–PANI composite. This research contributes to the development of instructional tools relevant to modern chemistry education while supporting the principles of renewable energy and the sustainable utilization of local resources. Keywords: Coconut shell charcoal, Experimental design, GO-PANI, Guided inquiry, Student worksheet.
Application of Project Based Worksheet to Develop Students' Scientific Performance through Making Hand Cream from Black Rice Kefir Delima, Dila; Windayani, Neneng; Aisyah, Riri; Sunarya, Risa Rahmawati; Sukmawardani, Yulia
JURNAL PENDIDIKAN MIPA Vol. 15 No. 2 (2025): JURNAL PENDIDIKAN MIPA
Publisher : Pusat Publikasi Ilmiah, STKIP Taman Siswa Bima

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37630/jpm.v15i2.2853

Abstract

This study aims to describe the learning process and analyze the development of students' scientific performance through the application of project-based worksheets in making hand cream from black rice kefir (Oryza sativa L.indica), as well as analyzing the characteristics of the hand cream products produced. The research was conducted at SMK MVP ARS International Bandung in class XI Pharmacy. The research approach used was quantitative with pre-experimental method and one shot case study design. The results showed that students' activities in the learning process reached a score of 93 and scientific performance obtained an average score of 89, both in the very good category. Product characterization showed that all formulations of hand cream from black rice kefir (Oryza sativa L.indica) met SNI standards with excellent quality based on pH, organoleptic, irritation, homogeneity, spreadability, and emulsion type parameters, and obtained a product assessment with an average score of 96. The LC50 value obtained from the antioxidant test results was 90.5500 (Strong). These findings indicate that the application of project-based worksheets is effective in developing students' scientific performance while producing quality products.
The Effect of pH and Temperature on The Stability of Anthocyanins from Black Soybean Skin Extracts Sunarya, Risa Rahmawati; Subarkah, Cucu Zenab; Purliantoro, Dwi; Taskinih, Taskinih; Islamiati, Fitri Nur
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol. 11 No. 1 (2024): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v11i1.35861

Abstract

Anthocyanins are natural dyes of purple and red. Anthocyanin dyes are applied in various industries as a drink or food coloring. As natural dyes, anthocyanins have an important role in human health. This research aimed to analyze the stability of anthocyanins from black soybean skin extract at varying pH and temperature. Anthocyanins from black soybean skins are macerated using two kinds of solvents. The solvents are distilled water + 30% citric acid and 70% ethanol + 1% HCl. Maceration was carried out at a temperature of 4℃. Then the anthocyanin was treated at a temperature range of 40-90℃ and pH of 5-9 and its absorbance was measured using UV-Vis’s spectrometry. The concentration of anthocyanin from black soybean skins is from the solvent distilled water + 30% citric acid of 1.992 mg/L, while from the solvent 70% ethanol + 1% HCl it was 1.936 mg/L. The color stability temperature t of black soybean skin extract was carried out at temperatures of 40°C, 50°C, 60°C, 70°C, 80°C, and 90°C. with respective absorbance of 0.274; 0.247; 0.237; 0.227; and 0.214. The higher the temperature, the anthocyanin content decreases. pH test was carried out at pH 5, 6, 7, 8, and 9 with respective absorbance values of 1.831; 1,759; 1,229; 1,118; and 1,066. The pH test showed that the higher the pH, the anthocyanin content was reduced, while the application of additional anthocyanin to white agar as food coloring showed that the anthocyanin content was only 0.125. It can be concluded that anthocyanins have good stability at low temperatures and acidic pH.
PENERAPAN LEMBAR KERJA BERBASIS PROYEK PADA PEMBUATAN PUPUK ORGANIK CAIR DARI LIMBAH TAHU UNTUK MENINGKATKAN LITERASI LINGKUNGAN Khuzaimah, A’isyah Nur Hasan; Sari, Sari; Farida, Ida; Sunarya, Risa Rahmawati
Lantanida Journal Vol 14 No 2 (2026): July-December 2026
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v14i2.35385

Abstract

Low environmental literacy among students remains a challenge, driven by limited interest in environmental issues and low environmental awareness. This study aimed to implement project-based student worksheets in the production of POCIHU (liquid organic fertilizer from tofu wastewater) and analyze the improvement of students' environmental literacy to analyze the characteristics of the resulting POCIHU. A pre-experimental method with a one-group pretest-posttest design was employed, involving 30 students from the Young Scientific Research Group (KIR) at a high school in Bandung. The project-based student worksheets received an average score of 92, which is categorized as very good. Environmental literacy was assessed through four aspects: content, context, process, and attitude. The results showed a significant improvement in environmental literacy, with average N-Gain scores of 0.73 for content, 0.71 for context, and 0.70 for process, all of which were classified as high. The attitude aspect reached 85%, categorized as very good. In addition, the POCIHU product achieved an average score of 97, indicating very good quality. These results indicate that project-based student worksheets are effective in improving students' environmental literacy.
Enhancing Students' Critical Thinking in Organic Chemistry: A Quasi-Experimental Study on PBL-Based E-Modules Helsy, Imelda; Rizkiyani , Sinta; Sari, Sari; Sunarya, Risa Rahmawati; Aisyah, Riri
Journal of The Indonesian Society of Integrated Chemistry Vol. 18 No. 1 (2026): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v18i1.57208

Abstract

Critical thinking skills are an essential 21st-century competency; however, students' mastery of protein concepts in Organic Chemistry remains low. This study, employing a quasi-experimental design (pretest-posttest nonequivalent control group) involving 77 undergraduate students, aimed to analyze the improvement in students' critical thinking skills through the implementation of an e-module-assisted Problem-Based Learning (PBL) model, as compared to conventional instruction. The research instrument consisted of a test designed to measure four critical thinking indicators: interpretation, analysis, inference, and evaluation. The results revealed that the experimental group achieved an average N-gain of 0.335 (moderate category), whereas the control group attained an average N-gain of only 0.07 (low category). However, the Mann-Whitney U test indicated no statistically significant difference in the improvement of critical thinking skills between the experimental and control groups (p = 0.324). Nevertheless, descriptive statistics demonstrated that the experimental group exhibited a higher average improvement in critical thinking skills than the control group. These findings suggest that the implementation of e-module-assisted PBL has the potential to foster students' critical thinking skills, despite the lack of a statistically significant difference when compared to conventional instruction
Co-Authors Auliya Nur Amalina Cucu Zenab Subarkah Dahriah, Iis Damar Rastri Adhika Delima, Dila Dwi Purliantoro Hijriansyah, Reza Ida Farida Imelda Helsy, Imelda Islamiati, Fitri Nur Khoirunnisa, Kuntum Salsabilla Khuzaimah, A’isyah Nur Hasan Muhammad Reza Nurfadilah, Lutfina Nurhayati Phutri Milana Ratnasari Ratnasari Riri Aisyah, Riri Rizkiyani , Sinta Salsafitri, Medina Fasya Taskinih, Taskinih Veinardi Suendo Viny Veronika Tanuwijaya Windayani, Neneng Yulia Sukmawardani, Yulia