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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
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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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

Abstract

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

Abstract

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

Abstract

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

Abstract

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.
Sonochemical Assisted Synthesis of Cr-PTC Metal Organic Framework, ZnO, and Fe3O4 Composite and Their Photocatalytic Activity in Methylene Blue Degradation Nurbayti, Siti; Adawiah, Adawiah; Bale, Uly Fitria; Fadhilla, Rizka; Ramadhan, Fitri Nur; Zulys, Agustino; Sukandar, Dede; Saridewi, Nanda; Tulhusna, Latifah
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 2 Year 2024 (August 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20156

Abstract

Methylene blue pollutants can be treated by photocatalytic methods using metal oxide-based semiconductor materials and metal organic framework (MOF). These two materials are often coupled into a composite to improve their physicochemical properties and catalytic activity. This research focuses on the synthesis of composites based on Cr-PTC MOF, ZnO, and Fe3O4 by the sonochemical method. The obtained composites were characterized and tested for catalytic activity in methylene blue pollutant degradation in an aqueous system under acidic conditions (pH = 5). Our investigation shows that the Cr-PTC@Fe3O4 composite possesses the lowest band gap energy of 1.86 eV and achieves the highest photocatalytic activity in methylene blue degradation at solution pH = 5, with a percent degradation of 84.36%. The sonochemical incorporation of Fe3O4 and Cr-PTC MOF is able to fabricate materials in a short time with better photocatalytic activity in degrading methylene blue than the single materials. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Synthesis of ZnO-TiO2 Nanoparticles by Sol-Gel Process and its Application for Solar Cell Semiconductor Saridewi, Nanda; Riyanti, Aditya; Aziz, Isalmi; Niski Kumila, Biaunik; Lian Risa Adinda, Ade
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 2, November 2023
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v9i2.32206

Abstract

ZnO-TiO2 semiconductor can be used in Dye-Sensitized Solar Cell (DSSC) devices as an alternative to renewable energy. This semiconductor can be synthesized by sol-gel method. The objective of this study is synthesizing the TiO2-doped ZnO nanoparticle semiconductors for DSSC devices with mangosteen peel extract dye. Avocado seeds were extracted with water, as a capping agent in the synthesis of ZnO-TiO2 (TiO2 ratio of 0,3,5,7 and 10% to ZnO). XRD results show the success of ZnO-TiO2 doping, due to the 2θ shift and changes in the crystal lattice. The average crystal size obtained was 33.7972 nm. The SEM results showed that the particle size of ZnO ranged from 45-100 nm. The UV-Vis dye measurements of mangosteen peel extract showed an absorption peak at 296-483 nm wavelength, with a corresponding band gap energy value of 3.04 eV. The UV-Vis DRS ZnO-TiO2 measurements have an average band gap energy of 3.1425 eV and ZnOof 3.1915 eV. The highest DSSC efficiency value is 2.15 x 10-2% at 7% ZnO-TiO2 semiconductor.
Synthesis and Characterization of Bioplastic from Macroalgae Padina australis Putri, Lily Surayya Eka; Saridewi, Nanda; Farah, Sabrina
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 2, November 2023
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v9i2.32906

Abstract

Synthetic plastics are one of the more significant contributors to waste in the environment. Bioplastic is a type of plastic that is environmentally friendly because it is made from biomass. In this study. brown macroalgae. Padina australis. is one of the potential raw materials found in large quantities in Indonesian waters and used to produce bioplastics with filtration technique. The aim of this study was to synthesis bioplastics using P. australis alginate with glycerol plasticizer.The alginate macroalgae were mixed with glycerol as a plasticizer in the following proportions: 1:15. 1:25. 2:15. and 2:25. with the quality determined through tensile strength measurements. water solubility. and degradation time. On day 12. the tensile strength of P. australis bioplastic was 3.24-7.33 MPa. the water solubility was 61.79-65.19%. and the biodegradability rate was 0.1-20.0%. When the macroalgae alginate and glycerol formulation was 2:25. the best bioplastic film produced had a tensile strength of 7.33 MPa and a water solubility of 61.79%. which was lower than the Indonesia National Standard number 7818/2016 for bioplastic products. P. australis. however. has the potential to be a promising alternative bioplastic product that contributes to the reduction of petroleum-based plastic pollution in the environment. Furthermore. as a preliminary study. it will be improved to meet industrial standards or find the products that match these characteristics.
Kahoot as an Assessment Tools: Students' Perception of Game-based Learning Platform Iman, Nurul; Ramli, Munasprianto; Saridewi, Nanda
Jurnal Penelitian dan Pembelajaran IPA Vol 7, No 2 (2021): Available Online in November 2021 (Web of Science Indexed)
Publisher : Department of Science Education, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/jppi.v7i2.8304

Abstract

This study aims to determine students' perception of game-based learning platform as a learning evaluation medium. The approach used in this research is descriptive quantitative, and qualitative—the instrument used in the form of a questionnaire containing 22 questions and interviews. The research was conducted in two analytical chemistry classes at a public university in Indonesia. Researchers used Kahoot every two weeks over four months as a tool for formative assessment. Three students from each class were interviewed to explore their experiences and perceptions of Kahoot. Questionnaire data were processed using descriptive statistics, while data from interviews were analyzed using thematic analysis. The findings show that chemistry education students' perception of game-based learning platform as a learning evaluation medium is quite good. Students also perceived that Kahoot provided a challenge in learning. Kahoot is also a fun and exciting assessment medium for students. In addition, students feel that their learning motivation has increased in preparing the material to be tested, so direct feedback from Kahoot is very effective in correcting mistakes.
Chemistry Teachers’ Perceptions on STEM (Science, Technology, Engineering, and Mathematics) Education Mardiyah, Farah Fathiaty; Saridewi, Nanda; Bahriah, Evi Sapinatul
Jurnal Penelitian dan Pembelajaran IPA Vol 7, No 2 (2021): Available Online in November 2021 (Web of Science Indexed)
Publisher : Department of Science Education, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/jppi.v7i2.7576

Abstract

Perception is a process of using the knowledge that a person has in interpreting an object. This study aims to determine the perceptions of Islamic senior high school chemistry teachers in South Tangerang, Indonesia towards STEM (Science, Technology, Engineering, and Mathematics) education. This study used descriptive qualitative method. The instrument used was an online questionnaire containing 17 questions with opened and closed forms, then the results were analyzed using hermeneutic techniques. Based on the results, it can be concluded that Islamic senior high school chemistry teachers in South Tangerang, Indonesia have a perception that STEM education is needed in learning.
Utilization of Open-Ended Problems Model to Analyze Students’ Creative Thinking Ability on Electrochemistry Lesson Humaeroh, Ika; Irwandi, Dedi; Saridewi, Nanda
Jurnal Penelitian dan Pembelajaran IPA Vol 4, No 2 (2018): Available Online in November 2018 (Web of Science Indexed)
Publisher : Department of Science Education, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2330.569 KB) | DOI: 10.30870/jppi.v4i2.3620

Abstract

The objective of the present research is to study students’ achievement in creative thinking ability and to determine the level of their ability in creative thinking in electrochemistry through open-ended problems model. The method used in this research is Descriptive Study. The sample of this research is 12th grade students majoring in Science of SMAN 3 South Tangerang which consist of 28 students. The sample taken are  students of 12th  grade majoring in science from selected classes; they have higher scores in daily test compared to 4 other classes. This was simply for convenience of studying the learning process and the implementation of open-ended model problem in this study. The data of this research was acquired from observation sheet, test and interview. In this research the achievement of student’s creative thinking ability was focused on three aspects of creative thinking: fluency, flexibility and originality. The result showed that student’s achievement on fluency was good, flexibility was average and originality was average. Meanwhile, the open-ended test result showed that student’s achievement on fluency was good, flexibility was average and originality was also average. Level of student’s ability in creative thinking was categorized as very poor, poor and average. Number of students in each category was 10 students (35.71%) in very poor category, 17 students (60.71%) in poor category, and 1 student (3.57%) in average category.
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