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<![CDATA[Synthesis Metal-Organic Framework (MOFs) Cr-PTC-HIna Modulated Isonicotinic Acid for Methylene Blue Photocatalytic Degradation ]]>
<![CDATA[Adawiah Adawiah]]>;
<![CDATA[Wulandari Oktavia]]>;
<![CDATA[Nanda Saridewi]]>;
<![CDATA[Farhan Maulana Azhar]]>;
<![CDATA[Risma Nur Fitria]]>;
<![CDATA[Muhammad Shofyan Gunawan]]>;
<![CDATA[Sri Komala]]>;
<![CDATA[Agustino Zulys]]>
<![CDATA[ Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 2 Year 2022 (June 2022) ]]>
Publisher : <![CDATA[Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS) ]]>
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DOI: 10.9767/bcrec.17.2.13930.383-393
<![CDATA[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). ]]>
<![CDATA[Pengaruh Metode Pembelajaran Bermain Peran terhadap Kemampuan Berpikir Kreatif Siswa pada Materi Koloid ]]>
<![CDATA[Rahayu, Putri]]>;
<![CDATA[Nanda Saridewi]]>;
<![CDATA[Aini Nadhokhotani Herpi]]>
<![CDATA[ Jurnal Pendidikan Vol. 25 No. 1 (2024) ]]>
Publisher : <![CDATA[LPPM Universitas Terbuka ]]>
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DOI: 10.33830/jp.v25i1.7433.2024
<![CDATA[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.]]>
<![CDATA[Sonochemical Assisted Synthesis of Cr-PTC Metal Organic Framework, ZnO, and Fe3O4 Composite and Their Photocatalytic Activity in Methylene Blue Degradation ]]>
<![CDATA[Nurbayti, Siti]]>;
<![CDATA[Adawiah, Adawiah]]>;
<![CDATA[Bale, Uly Fitria]]>;
<![CDATA[Fadhilla, Rizka]]>;
<![CDATA[Ramadhan, Fitri Nur]]>;
<![CDATA[Zulys, Agustino]]>;
<![CDATA[Sukandar, Dede]]>;
<![CDATA[Saridewi, Nanda]]>;
<![CDATA[Tulhusna, Latifah]]>
<![CDATA[ Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 2 Year 2024 (August 2024) ]]>
Publisher : <![CDATA[Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS) ]]>
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DOI: 10.9767/bcrec.20156
<![CDATA[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).]]>
<![CDATA[Synthesis of ZnO-TiO2 Nanoparticles by Sol-Gel Process and its Application for Solar Cell Semiconductor ]]>
<![CDATA[Saridewi, Nanda]]>;
<![CDATA[Riyanti, Aditya]]>;
<![CDATA[Aziz, Isalmi]]>;
<![CDATA[Niski Kumila, Biaunik]]>;
<![CDATA[Lian Risa Adinda, Ade]]>
<![CDATA[ Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 2, November 2023 ]]>
Publisher : <![CDATA[Syarif Hidayatullah State Islamic University ]]>
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DOI: 10.15408/jkv.v9i2.32206
<![CDATA[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.]]>
<![CDATA[Synthesis and Characterization of Bioplastic from Macroalgae Padina australis ]]>
<![CDATA[Putri, Lily Surayya Eka]]>;
<![CDATA[Saridewi, Nanda]]>;
<![CDATA[Farah, Sabrina]]>
<![CDATA[ Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 2, November 2023 ]]>
Publisher : <![CDATA[Syarif Hidayatullah State Islamic University ]]>
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DOI: 10.15408/jkv.v9i2.32906
<![CDATA[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.]]>
<![CDATA[Kahoot as an Assessment Tools: Students' Perception of Game-based Learning Platform ]]>
<![CDATA[Iman, Nurul]]>;
<![CDATA[Ramli, Munasprianto]]>;
<![CDATA[Saridewi, Nanda]]>
<![CDATA[ Jurnal Penelitian dan Pembelajaran IPA Vol 7, No 2 (2021): Available Online in November 2021 (Web of Science Indexed) ]]>
Publisher : <![CDATA[Department of Science Education, Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.30870/jppi.v7i2.8304
<![CDATA[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.]]>
<![CDATA[Chemistry Teachers’ Perceptions on STEM (Science, Technology, Engineering, and Mathematics) Education ]]>
<![CDATA[Mardiyah, Farah Fathiaty]]>;
<![CDATA[Saridewi, Nanda]]>;
<![CDATA[Bahriah, Evi Sapinatul]]>
<![CDATA[ Jurnal Penelitian dan Pembelajaran IPA Vol 7, No 2 (2021): Available Online in November 2021 (Web of Science Indexed) ]]>
Publisher : <![CDATA[Department of Science Education, Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.30870/jppi.v7i2.7576
<![CDATA[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.]]>
<![CDATA[Utilization of Open-Ended Problems Model to Analyze Students’ Creative Thinking Ability on Electrochemistry Lesson ]]>
<![CDATA[Humaeroh, Ika]]>;
<![CDATA[Irwandi, Dedi]]>;
<![CDATA[Saridewi, Nanda]]>
<![CDATA[ Jurnal Penelitian dan Pembelajaran IPA Vol 4, No 2 (2018): Available Online in November 2018 (Web of Science Indexed) ]]>
Publisher : <![CDATA[Department of Science Education, Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.30870/jppi.v4i2.3620
<![CDATA[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.]]>
<![CDATA[The Implementation of Discovery Learning Method to Increase Learning Outcomes and Motivation of Student in Senior High School ]]>
<![CDATA[Saridewi, Nanda]]>;
<![CDATA[Suryadi, Joko]]>;
<![CDATA[Hikmah, Nur]]>
<![CDATA[ Jurnal Penelitian dan Pembelajaran IPA Vol 3, No 2 (2017): Available Online in November 2017 (Web of Science Indexed) ]]>
Publisher : <![CDATA[Department of Science Education, Universitas Sultan Ageng Tirtayasa ]]>
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DOI: 10.30870/jppi.v3i2.782
<![CDATA[Abstract Based on data from the observation of high school students grade XI that daily low student test scores due to a lack of role of students in the learning process. This classroom action research aims to improve learning outcomes and student motivation through discovery learning method in colloidal material. This study uses the approach developed by Lewin consisting of planning, action, observation, and reflection. Data collection techniques used the questionnaires and ability tests end. Based on the research that results for students received a positive influence on learning by discovery learning model by increasing the average value of 74 students from the first cycle to 90.3 in the second cycle and increased student motivation in the form of two statements based competence (KD) categories (sometimes) on the first cycle and the first statement KD category in the second cycle. Thus the results of this study can be used to improve learning outcomes and student motivation. Keywords: Discovery Learning Method, Learning Outcomes, Student Motivation, Colloid]]>
<![CDATA[Impact of Using Macromedia Flash-Based Audio-Visual Learning Media on Student Motivation to Learn About The Concept of Enthalpy Change ]]>
<![CDATA[Nadhokhotani Herpi, Aini]]>;
<![CDATA[Susilo, Ahmad]]>;
<![CDATA[Saridewi, Nanda]]>
<![CDATA[ Jurnal Edusci Vol 1 No 6 (2024): Vol. 1 No.6 July 2024 ]]>
Publisher : <![CDATA[Annpublisher ]]>
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DOI: 10.62885/edusci.v6i1.386
<![CDATA[Cultivating learning motivation is crucial for instilling passion in students for studying chemistry. However, traditional learning methods that rely on little media usage fail to enhance students' willingness to learn. Macromedia Flash learning media is a practical option for enhancing student learning motivation. This media promotes active student engagement and cultivates enthusiasm and passion for learning. This study aims to assess the impact of Macromedia Flash learning media on students' motivation to learn and their understanding of the subject of enthalpy change. The research methodology employed in this study is a quasi-experimental design with a posttest-only control group. The research was conducted at SMA Nusantara Plus, using class XI Science 1 as the experimental group and class XI Science 2 as the control group. Each group consisted of 33 students. The instrument used was a non-experimental tool in the form of a questionnaire consisting of 25 statements to assess learning motivation. The t-test conducted for the hypothesis test yielded a two-tailed Significance value of 0.000, leading to the rejection of the null hypothesis (H0) and acceptance of the alternative hypothesis (H1). The study's findings demonstrated that using Macromedia Flash learning media significantly impacted students' motivation to learn the material on enthalpy change.]]>
