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All Journal VALENSI JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Lingkungan EDUSAINS Bulletin of Chemical Reaction Engineering & Catalysis JINOP (Jurnal Inovasi Pembelajaran) EduChemia: Jurnal Kimia dan Pendidikan Jurnal Penelitian dan Pembelajaran IPA Edu Sains: Jurnal Pendidikan Sains dan Matematika Jurnal Penelitian Pendidikan Kimia ALCHEMY Jurnal Penelitian Kimia Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Riset Pendidikan Kimia (JRPK) Fullerene Journal of Chemistry Jurnal Pendidikan JPPIPA (Jurnal Penelitian Pendidikan IPA) LAVOISIER: Chemistry Education Journal Cendikia Pendidikan Bulletin of Chemical Reaction Engineering & Catalysis Journal of Education Sciences (Edusci) LAVOISIER: Chemistry Education Journal Journal of Chemistry Sciences and Education

Nanda Saridewi, Nanda

Departement Of Chemistry Education, Faculty Of Educational Science, Syarif Hidayatullah State Islamic University Of Jakarta, Indonesia, 15412

Author-ID : 574801

Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Social Sciences Other

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Articles

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Reconstruction of Practice Module on the Adsorbent Topic Contained the Nature of Science (NOS) Dinnah Raihanah; Nanda Saridewi; Dila Fairusi
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 2 (2020): 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.v5i2.30696

The training module is a learning material with interesting illustrations, communicative language, and can be adapted to students' knowledge. Through this module, students can apply their knowledge to life. This study aims to reconstruct the practice module on the topic of adsorbents contained in NOS. The research design of the Educational Reconstruction Model (MER) as the primary reference in making the adsorbent practice module. The participant used was one of the secondary schools in the city of South Tangerang. The results of the calculation of the Content Validity Ratio (CVR) and Content Validity Index (CVI) show that the chemical concepts presented are valid and do not need to be improved. Test results show that from 30 student respondents, the overall percentage data was 89.8%, which means that this module is excellent and suitable as a source of learning in schools. The results of this study can be used as an example of innovating teaching materials.

Analisis Konsep Kimia Terkait dengan Pembuatan Surfaktan dari Ampas Tebu Ai Fiyani; Nanda Saridewi; Siti Suryaningsih
Jurnal Riset Pendidikan Kimia (JRPK) Vol 10 No 2 (2020): Jurnal Riset Pendidikan Kimia (JRPK), Volume 10 Nomor 2 (2020)
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JRPK.102.05

Understanding concepts is not enough just to provide information from the teacher, but students must be able to construct their knowledge and understanding of the knowledge they have and apply it to everyday life, including colloidal material. This research was conducted to analyze the chemical concepts associated with making surfactants from sugarcane bagasse. The research method is qualitative descriptive research on 6 Chemistry Education Lecturers at the Tarbiyah and Teacher Training UIN Syarif Hidayatullah Jakarta. The method used is random sampling. The instrument used in the form of rubrics that contain chemical concepts related to the manufacture of surfactants from bagasse with grading scale of 1-3. The implementation consists of: (1) Preparation stage, namely the creation of context content analysis instruments relating to surfactants, and research permits; (2) Research stage, covering all activities at the research site, namely research instrument testing and data collection; (3) Stage of completion, including data processing. The results of the analysis are then calculated the Content Validity Ratio (CVR) and Content Validity Index (CVI). CVI value of 0.72 was obtained, which means that the content is highly related in the production of surfactants from sugarcane bagasse. The results of the analysis of chemical concepts related to the manufacture of surfactants from bagasse, in general have been contained in curriculum books, literature, journals, articles. This shows that the concept in making surfactants can be used in chemistry learning in high school students. The implications of this study make it easier for students to know the chemicals involved in making surfactants. Keywords Chemical concepts, surfactants, bagasse, colloids

Catalytic Cracking of Crude Biodiesel into Biohydrocarbon Using Natural Zeolite Impregnated Nickel Oxide Catalyst Isalmi Aziz; Edra Aditya Fhilipia Ardine; Nanda Saridewi; Lisa Adhani
Jurnal Kimia Sains dan Aplikasi Vol 24, No 7 (2021): Volume 24 Issue 7 Year 2021
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Crude biodiesel is biodiesel that still contains impurities. A catalytic can improve the quality of biohydrocarbons (biogasoline, biokerosene, and green diesel). The catalyst used is nickel oxide impregnated natural zeolite (NiO/Zeolite). The use of nickel can increase the activity of the catalyst because it has an empty d orbital and a smaller molecular size. This study aims to determine the best catalyst that can exhibit the greatest selectivity toward biohydrocarbons. Natural zeolite was activated and impregnated by varying the concentration of NiO (1, 3, and 5% w/w). The characteristics of the catalyst were determined by the crystallinity (X-Ray Diffraction), surface area (Surface Area Analyzer), and functional group (Fourier Transform Infrared). The catalyst and crude biodiesel were put in an autoclave reactor and operated at a temperature of 375°C and 3 hours. The obtained product was tested with Gas Chromatography-Mass Spectroscopy. The results of the XRD analysis showed the presence of NiO at 2θ 37.23; 43.15; and 62.65°. Nickel oxide on the catalyst was detected at a wavenumber of 671.23 cm‑1. The highest surface area was obtained at a NiO/Zeolite 1% of 49.4 m2/g. 1% NiO/Zeolite catalysts gave the best results on catalytic cracking of crude biodiesel with a reaction conversion of 60.79% and selectivity of 9,73%; 29,64% and 9,18% for biogasoline, biokerosene, and green diesel, respectively.

Characterization and Antibacterial Activity Test of Green Synthetic ZnO Nanoparticles Using Avocado (Persea americana) Seed Extract Nanda Saridewi; Adelian Risa Adinda; Siti Nurbayti
Jurnal Kimia Sains dan Aplikasi Vol 25, No 3 (2022): Volume 25 Issue 3 Year 2022
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

The ability of cotton fabrics to absorb water creates several problems, such as providing an environment for bacterial growth. Antibacterial properties of textiles can be conducted by coating with nanoparticles with antibacterial activity. This study aimed to synthesize ZnO via green process nanoparticles using avocado seed extract (Persea americana), then characterize and evaluate its antibacterial activity on cotton fabrics. This research began with extracting avocado seed powder with distilled water. Then the avocado seed extract was mixed with Zn(CH3COO)2.2H2O and heated in a water bath at 70°C. The mixture was stirred while NaOH was added until the mixture reached pH 7, 8, and 9. The FTIR measurement of the avocado seed extract showed the presence of free hydroxyl and amino groups that act as reducing agents, capping agents, and stabilizers in the synthesis of ZnO nanoparticles. The XRD pattern of synthesized ZnO nanoparticles was hexagonal. The SEM results showed that the morphology of ZnO nanoparticles was spherical, with a particle size of 19.965 nm. Antibacterial activity was carried out on the cotton cloth coated with ZnO nanoparticles, resulting in an inhibition zone of 1.8 cm against E. coli and 1.97 cm against S. aureus bacteria. This study result indicated that ZnO nanoparticles have antibacterial activity by producing inhibition against E. coli and S. aureus.

Synthesis of ZnO-Fe3O4 Magnetic Nanocomposites through Sonochemical Methods for Methylene Blue Degradation Nanda Saridewi; Sri Komala; Agustino Zulys; Siti Nurbayti; Latifah Tulhusna; Adawiah Adawiah
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 3 Year 2022 (September 2022)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.3.15492.650-660

Textile industry waste can pollute the aquatic environment because it contains dye contaminants with very stable properties that are difficult to degrade naturally. However, dye contaminants degradation can be carried out by photodegradation using ZnO-Fe3O4 magnetic nanocomposite photocatalysts. This study aims to synthesize ZnO-Fe3O4 magnetic nanocomposite through a sonochemical method. Then measure their photocatalytic activity in methylene blue degradation. The best ZnO-Fe3O4 magnetic nanocomposite is made of ZnO:Fe3O4 mass ratio of 4:1 with a crystal size of 31.058 nm, a hexagonal crystal phase and a particle size of 173.23 nm. The ZnO-Fe3O4 magnetic nanocomposites (4:1) provides optimum degradation capacity of methylene blue under halogen lamp irradiation of 99.56 mg/g at pH 13. Furthermore, the ZnO-Fe3O4 magnetic nanocomposites had good stability in 10 cycles reaction with a degradation capacity of 99.24-99.75 mg/g. The photocatalytic degradation of methylene blue by ZnO-Fe3O4 occurs through the formation of free radical species with hydroxyl radicals as the dominant species that play an important role in the degradation process. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Utilization of Coconut Shell as Cr2O3 Catalyst Support for Catalytic Cracking of Jatropha Oil into Biofuel Isalmi Aziz; Yessinta Kurnianti; Nanda Saridewi; Lisa Adhani; Wahyu Permata
Jurnal Kimia Sains dan Aplikasi Vol 23, No 2 (2020): Volume 23 Issue 2 Year 2020
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Coconut shell waste is a waste that has a high carbon content. Carbon in coconut shell waste can be converted into activated carbon having a large surface area. This potential property is suitable to apply the coconut shell as catalyst support. To increase the catalytic activity, metal oxides such as Cr2O3 are impregnated. The purpose of this study is to synthesize Cr2O3/carbon catalyst and test its catalytic activity on catalytic cracking of Jatropha oil. The first stage was the synthesis of activated carbon and the determination of its proximate and ultimate. The second step was impregnation to produce Cr2O3/carbon catalyst. Furthermore, X-Ray Diffraction to determine crystallinity, Surface Area Analyzer to identify its surface area and Fourier Transform Infrared to analyze functional groups. Then the catalytic activity was tested on the catalytic cracking of Jatropha oil. In addition, the chemical compound composition and biofuel selectivity of the catalytic cracking product was determined using Gas Chromatography-Mass Spectrometer. Proximate analysis results showed that activated carbon contains 9%, 1%, 23%, and 67% of water, ash, evaporated substances, and bound carbon, respectively. The results of the ultimate analysis resulted in carbon (C), hydrogen (H), and nitrogen (N) contents of 65.422%, 3.384%, and 0.465%, correspondingly. The catalyst crystallinity test showed the presence of Cr2O3 peaks at 2θ: 24.43°; 33.47° and 36.25° according to JCPDS No. 84-1616. In the absorption area of 400-1000 cm-1 and the range of 2000 cm-1 showed the presence of Cr-O stretching due to Cr2O3 adsorbed into the activated carbon structure. The surface area of activated carbon and Cr2O3/carbon catalysts with a concentration of 1.3, and 5% was 8.930 m2/g; 47.205 m2/g; 50.562 m2/g; and 38.931 m2/g, respectively. The catalytic activity test presented that the best performance was showed by Cr2O3/carbon catalyst with a concentration of 5% indicated by conversion of Jatropha oil into biofuel of 67.777% with gasoline selectivity, kerosene, and diesel of 36.97%, 14.87%, and 15.94%, correspondingly.

Pengaruh Media Pembelajaran Berbasis Aplikasi Edmodo Terhadap Hasil Belajar Siswa Materi Hidrokarbon Dila Salsabila; Buchori Muslim; Nanda Saridewi
Jurnal Penelitian Pendidikan Kimia: Kajian Hasil Penelitian Pendidikan Kimia Vol 10, No 1 (2023)
Publisher : Chemistry Education Study Program Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jppk.v10i1.21027

Perkembangan teknologi tidak bisa dihindari lagi di abad 21 ini. Teknologi pendidikan telah menjadi pelengkap utama dalam setiap aktivitas belajar, sehingga muncul inovasi-inovasi baru untuk mendukung kegiatan pembelajaran. Salah satunya adalah semakin banyaknya variasi media pembelajaran diantaranya mocca, moodle, google classroom, ruang guru, zenius dan edmodo. Edmodo merupakan aplikasi pembelajaran berbasis media sosial yang aman bagi guru dan siswa dan tampilannya mirip dengan facebook untuk memberikan keakraban bagi penggunanya. Tujuan penelitian ini adalah untuk mengetahui pengaruh penggunaan media pembelajaran berbasis aplikasi edmodo terhadap hasil belajar siswa materi hidrokarbon. Penelitian ini dilaksanakan di SMA N 2 Jonggol pada tahun ajaran 2022/2023. Metode dalam penelitian ini adalah quasi experiment dengan nonequivalent pretest-posttest control grup design. Sampel yang digunakan dalam penelitian ini adalah siswa kelas XI MIPA 5 sebagai kelas eksperimen dan siswa kelas XI MIPA 4 sebagai kelas kontrol yang masing-masing berjumlah 30 siswa untuk tiap kelasnya. Instrument yang digunakan yaitu tes tertulis dan angket. Teknik analisis data menggunakan uji T. Hasil penelitian menunjukkan bahwa uji hipotesis (Independent Simple t-Test) diperoleh hasil nilai signifikansi (sig. 2- tailed) sebesar 0,002 < 0,05 sehingga H0 ditolak sedangkan Ha diterima. Artinya terdapat pengaruh media pembelajaran berbasis aplikasi edmodo terhadap hasil belajar siswa materi hidrokarbon, sehingga aplikasi Edmodo dapat digunakan untuk kegiatan pembelajaran.

Deoksigenasi Katalitik Metil Ester Asam Lemak Menjadi Biohidrokarbon Menggunakan Katalis Cr2O3/Zeolit Isalmi Aziz; Nanda Saridewi; Fitri Febriyani; Lisa Adhani
ALCHEMY Jurnal Penelitian Kimia Vol 19, No 2 (2023): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.19.2.72521.170-176

Deoksigenasi katalitik merupakan proses yang dapat mengkonversi metil ester asam lemak (fatty acid methyl esters, FAME) menjadi biohidrokarbon seperti gasolin, kerosin dan diesel. Katalis yang digunakan berupa Cr2O3 dengan penyangga zeolit alam. Penelitian ini bertujuan untuk menentukan pengaruh konsentrasi Cr2O3 terhadap karakteristik dan aktivitas katalitik katalis pada deoksigenasi katalitik FAME menjadi biohidrokarbon. Katalis dikarakterisasi menggunakan XRD, FTIR DAN SAA. Semua katalis menunjukkan puncak Cr2O3 pada 2θ 24,5°; 33,6°; 36,2°;54,8° dan ukuran kristal 19 ‒ 21 nm. Serapan pada bilangan gelombang 470 ‒ 900 cm-1 mengindikasikan adanya peregangan Cr‒O. Peningkatan konsentrasi Cr2O3 menyebabkan luas permukaan menjadi turun. Katalis Cr2O3/zeolit 1% menunjukkan aktivitas terbesar dengan konversi 60,36% dan selektivitas biohidrokarbon 43,15% yang terdiri dari gasolin 7,23%, kerosin 15,08% dan diesel 20,84%.Catalytic Deoxygenation of Fatty Acid Methyl Esters into Biohydrocarbons using Cr2O3/Zeolite Catalysts. Catalytic deoxygenation is a process that can convert fatty acid methyl esters (FAME) into biohydrocarbons such as gasoline, kerosene, and diesel. The catalyst used is Cr2O3 with natural zeolite as support. This study aims to determine the effect of Cr2O3 concentration on the characteristics and catalytic activity in the catalytic deoxygenation of FAME into biohydrocarbons. The catalysts were characterized using XRD, FTIR, and SAA. All catalysts show a Cr2O3 peak at 2θ 24.5°, 33.6°, 36.2°, 54.8° and a crystal size of 19 ‒ 21 nm. The Cr‒O stretching is observable at wavenumbers 470 ‒ 900 cm-1. Increasing the concentration of Cr2O3 causes the surface area to decrease. Cr2O3/zeolite 1% catalyst showed the most excellent activity with 60.36% conversion and 43.15% selectivity for biohydrocarbons consisting of 7.23% gasoline, 15.08% kerosene, and 20.84% diesel.

ANALISIS KETERAMPILAN PROSES SAINS MAHASISWA KIMIA UIN SYARIF HIDAYATULLAH JAKARTA PADA PRAKTIKUM KIMIA ANORGANIK DARI RUMAH Nine Novita Cahya; Nanda Saridewi; Buchori Muslim
Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia Vol 6, No 2 (2023)
Publisher : Universitas Islam Kalimantan MAB Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/dl.v6i2.10734

Keterampilan abad ke-21 perlu dilatih agar mahasiswa mampu menghadapi tantangan zaman, salah satunya dengan mengembangkan keterampilan proses sains yang didukung dengan salah satu aspek penilaian dalam taksonomi bloom, yakni keterampilan. Salah satunya, pengembangan keterampilan melalui kegiatan praktikum dilakukan di rumah dengan alat dan bahan sehari-hari. Penelitian ini bertujuan untuk mengetahui keterampilan proses sains (KPS) mahasiswa kimia UIN Syarif Hidayatullah Jakarta. Metode yang digunakan deskriptif kuantitatif dengan subjek penelitian mahasiswa kimia semester tiga yang berjumlah 62 orang dengan instrumen lembar observasi. Hasil penelitian menunjukkan KPS mahasiswa berada pada kategori baik dengan persentase rata-rata 72%. Analisis KPS pada kelas A, B, dan C, memiliki rata-rata persentase sebesar 75%, 69%, dan 71% dengan kategori baik. Analisis berdasarkan kemampuan kognitif menunjukkan persentase rata-rata mahasiswa dengan kemampuan kognitif tinggi, sedang, dan rendah sebesar 72%, 71%, dan 73% dengan kategori baik. Analisis KPS berdasarkan gender menunjukkan persentase mahasiswa laki-laki dan perempuan 72% dengan kategori baik.

Pengaruh Pendekatan Reciprocal Teaching Pembelajaran Jarak Jauh Terhadap Aktivitas Dan Hasil Belajar Siswa Erica Anna Pratiwi; Salamah Agung; Nanda Saridewi
Edu Sains: Jurnal Pendidikan Sains & Matematika Vol 11, No 1 (2023): VOLUME 11 NOMOR 1 JUNI 2023
Publisher : IAIN Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23971/eds.v11i1.4163

Penelitian ini bertujuan untuk mengetahui adanya pengaruh aktivitas dan hasil belajar siswa yang diajarkan menggunakan pendekatan reciprocal teaching. Penelitian ini menggunakan metode kuasi eksperimen dengan rancangan penelitian nonequivalent control group design. Sampel pada penelitian adalah kelas XI MIPA 1 sebagai kelas eksperimen dan kelas XI MIPA 2 sebagai kelas kontrol. Hasil observasi aktivitas siswa pada keempat indikator menunjukkan kelas eksperimen lebih unggul dibandingkan kelas kontrol. Hasil penelitian dari uji parametrik Uji t pada hasil pretest menunjukkan bahwa kemampuan awal siswa pada kedua kelas tidak ada perbedaan. Kemudian uji non parametrik Uji Mann-Whitney menunjukkan nilai signifikansi 0,006 artinya terdapat perbedaan posttest hasil belajar siswa antara kelas eksperimen dengan kelas kontrol, sehingga dapat disimpulkan terdapat pengaruh aktivitas dan hasil belajar siswa dengan pendekatan reciprocal teaching pembelajaran jarak jauh materi koloid.

Co-Authors Abdul Rifki Achmad Yandi Rahmatul Fajri Adawiah Adawiah Adawiah Adawiah Adawiah Adawiah adawiah adawiah, adawiah Adelian Risa Adinda Admin Alif Agustino Zulys Ai Fiyani Aini Nadhokhotani Herpi Anna Muawanah Aqsha Pandia Swangganegara Aulia, Hanna Bahriah, Evi Sapinatul Bale, Uly Fitria Biaunik Niski Kumila Buchori Muslim Buchori Muslim Dasumiati Dasumiati Dede Sukandar Dedi Irwandi Desy Rositasari Dila Fairusi Dila Salsabila Dinnah Raihanah Dwiatmoko, Adid Adep Dwie Annisa Dzikri Anfasa Firdaus Edra Aditya Fhilipia Ardine Erica Anna Pratiwi Fadhilla, Rizka Fajri, Achmad Yandi Rahmatul Farah, Sabrina Farhan Maulana Azhar Farishi, Salman Fitri Febriyani Fitria, Shella Herpi, Aini Nadhokhotani Humaeroh, Ika Iman, Nurul Isalmi Aziz Latifah Tulhusna Lian Risa Adinda, Ade Lily Surayya Eka Putri, Lily Surayya Eka Lisa Adhani Lisa Adhani Lisa Adhani Luki Yunita Mardiyah, Farah Fathiaty Muhammad Farhan Muhammad Shofyan Gunawan Munasprianto Ramli Nabila Fauziah Nadhokhotani Herpi, Aini Nine Novita Cahya Niski Kumila, Biaunik Nur Azizah, Dinda Nur Hikmah Nur Hikmah Nurhasni Nurhasni Rahayu, Putri Ramadhan, Fitri Nur Ramli, Munasprianto Ricky Gunawan, Ricky Ridla Bakri Risma Nur Fitria Riyanti, Aditya Rizki Nurhidayah Rizkyani, Arivia Monique Rizqy Nur Solihat Saeful Rohman Salamah Agung, Salamah Sari, Nur Nilam Selviana Rustanti Siti Nurbayti Siti Nurbayti Siti Nurbayti Siti Nurbayti Siti Suryaningsih, Siti Solly Aryza Sri Komala Sri Komala Suryadi, Joko Susilo, Ahmad Syukri Arif Tonih Feronika, Tonih Tulhusna, Latifah Wahyu Permata Wulandari Oktavia Yessinta Kurnianti Yulyani Nur Azizah

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