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All Journal VALENSI JURNAL KIMIA SAINS DAN APLIKASI EDUSAINS 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 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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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.

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.

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.

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 : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

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).

Synthesis of ZnO Nanoparticle using Lidah Mertua (Sansevieria trifasciata) Extract through Sol-Gel Method and Its Application for Methylene Blue Photodegradation Nanda Saridewi; Selviana Rustanti; Agustino Zulys; Siti Nurbayti; Isalmi Aziz; Adawiah Adawiah
Bulletin of Chemical Reaction Engineering & Catalysis 2023: BCREC Volume 18 Issue 3 Year 2023 (October 2023)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.19647

Methylene blue is widely used in the textile industry and is difficult to degrade naturally because of its heterocyclic aromatic structure. One technique that can be used to degrade methylene blue is through a photocatalytic process using ZnO nanoparticles. This study aims to synthesize ZnO nanoparticles using Lidah mertua extract (Sansevieria trifasciata) as a capping agent by the sol-gel method, and determine the characteristics and stability of ZnO nanoparticles in methylene blue photodegradation. The synthesis of ZnO nanoparticles begins with drying Lidah mertua, grinding it, and then extracting it using distilled water. Furthermore, the extract was reacted with Zn(CH3COO)2.2H2O 0.15 M at pH 8. The extract was characterized using Fourier Transform Infrared (FTIR), and the ZnO nanoparticles were characterized using X-Ray Diffraction (XRD), ultraviolet-visible (UV-Vis) DRS, and Scanning Electron Microscopy (SEM). Lidah mertua extract has OH (hydroxyl), CN, CH, and C=C functional groups. The obtained ZnO nanoparticles have a crystal size of 19.324 nm. The crystalline phase is hexagonal; the morphology is spherical, with a particle size of 79.153 nm and a band gap energy of 3.21 eV. ZnO nanoparticles exhibited a methylene blue decolorization of 98.50% through 43.41% by adsorption and 55.09% by photocatalytic mechanism. ZnO nanoparticles showed good stability for a three-cycle reaction. Copyright © 2023 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)

Synthesis Metal-Organic Framework (MOFs) Cr-PTC-HIna Modulated Isonicotinic Acid for Methylene Blue Photocatalytic Degradation Adawiah Adawiah; Wulandari Oktavia; Nanda Saridewi; Farhan Maulana Azhar; Risma Nur Fitria; Muhammad Shofyan Gunawan; Sri Komala; Agustino Zulys
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 2 Year 2022 (June 2022)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.2.13930.383-393

A novel responsive visible light Cr-based MOF, Cr-PTC-HIna, was synthesized using the solvothermal method. Cr-PTC-HIna peaks were observed at 2θ = 9.04°, 12.71°, 14.88°, 25,48°, 27.72°, 28.97°, and 43.60° with a crystal size of 21 nm. Band gap energy achieved from the Cr-PTC HIna was 2.05 eV. Scanning Electron Microscope (SEM) analysis obtained a 3D structural morphology of MOFs Cr-PTC-HIna with a cylindrical tube shape and a particle size of 251.45 nm. Cr-PTC-HIna gave the optimum methylene blue degradation at pH of 7 under 250 watts mercury lamp irradiation for 180 minutes with degradation capacity of 95.40 mg/g. Electron holes and hydroxyl radicals were found as the dominant species contributing to methylene blue degradation. 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).

Pengaruh Metode Pembelajaran Bermain Peran terhadap Kemampuan Berpikir Kreatif Siswa pada Materi Koloid Rahayu, Putri; Nanda Saridewi; Aini Nadhokhotani Herpi
Jurnal Pendidikan Vol. 25 No. 1 (2024)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33830/jp.v25i1.7433.2024

Berpikir kreatif merupakan kemampuan yang harus dimiliki oleh siswa terutama dalam pembelajaran kimia, namun pembelajaran yang pasif dengan metode konvensional tidak dapat mendorong siswa untuk mengembangkan kemampuan berpikir kreatifnya. Penelitian ini bertujuan untuk mengetahui pengaruh metode pembelajaran bermain peran terhadap kemampuan berpikir kreatif siswa pada materi koloid. Metode penelitian yang digunakan yaitu quasi experiment dengan desain penelitian non-equivalent control group design. Sampel yang digunakan pada penelitian ini berjumlah 72 siswa, yaitu siswa pada dua kelas XI IPA SMA Negeri 6 Depok dengan menggunakan teknik purposive sampling. Instrumen penelitian yang digunakan adalah instrumen tes keterampilan berpikir kreatif sebanyak 15 soal uraian. Hasil uji hipotesis N-Gain menggunakan uji Mann-Whitney menghasilkan nilai Signifikansi (2-tailed) sebesar 0,000 (0,000 < 0,05), sehingga H0 ditolak dan Ha diterima. Hasil penelitian menunjukkan bahwa terdapat pengaruh metode pembelajaran bermain peran terhadap kemampuan berpikir kreatif siswa pada materi koloid.

Co-Authors 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 Humaeroh, Ika Iman, Nurul Isalmi Aziz Isalmi Aziz Latifah Tulhusna Lian Risa Adinda, Ade Lily Surayya Eka Putri, Lily Surayya Eka Lisa Adhani Lisa Adhani Lisa Adhani Luki Yunita Mala, Farhah Syahidatul Mardiyah, Farah Fathiaty Muhammad Farhan Muhammad Shofyan Gunawan Nabila Fauziah 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 Rifki, Abdul Risma Nur Fitria Riyanti, Aditya Rizki Nurhidayah Rizkyani, Arivia Monique Rizqy Nur Solihat Saeful Rohman Salamah Agung, Salamah 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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