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Synthesis of MgFe2O4 Nanoparticles and its Application for Photodegradation of Methylene Blue Sukandar, Dede; Adawiah, Adawiah; Rohman, Saeful; Fitria, Shella; Saridewi, Nanda; Farishi, Salman; Nurhasni, Nurhasni; Aziz, Isalmi; Azizah, Yulyani Nur
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 4 Year 2024 (December 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20222

Methylene blue wastewater from the paper, clothing, and textile industries can adversely affect aquatic ecosystems if improperly treated. One method to treat methylene blue pollutants in sewage is through photocatalysis techniques using magnesium ferrite (MgFe2O4) nanoparticle-based semiconductors. The MgFe2O4 is effective for methylene blue degradation because it is stable in aqueous systems, inexpensive, and has good photocatalytic activity. This study aims to synthesize MgFe2O4 nanoparticles with pumpkin seed extract (Cucurbita moschata) as a capping agent through a hydrothermal method. Characterization results show that MgFe2O4 nanoparticles synthesized with the addition of 3 mL pumpkin seed extract have a crystal size of 3.87 nm, cubic spinel structure, average particle size of 29 nm, and band gap energy value of 1.94 eV. The MgFe2O4 nanoparticles produced optimum degradation efficiency under mercury lamp irradiation with a degradation capacity of 391.98 mg/g at pH 12. 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).

PENGEMBANGAN MEDIA PEMBELAJARAN E-MODUL BERBASIS ISPRING SUITE PADA MATERI LAJU REAKSI Aqsha Pandia Swangganegara; Nanda Saridewi; Aini Nadhokhotani Herpi
Sindoro: Cendikia Pendidikan Vol. 13 No. 1 (2025): Sindoro Cendikia Pendidikan
Publisher : Cahaya Ilmu Bangsa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9644/sindoro.v13i1.11299

Penelitian ini bertujuan untuk mengetahui proses pengembangan media pembelajaran e-modul berbasis Ispring Suite pada materi laju reaksi. Metode Research and Development (R&D) digunakan dalam penelitian ini dengan model ADDIE. Model pengembangan ADDIE terdiri dari analyze (analisis), design (perancangan), development (pengembangan), implementation (penerapan), dan evaluation (penilaian), namun pada penelitian ini dibatasi tanpa tahap penilaian. Instrumen yang digunakan yaitu instrumen analisis kebutuhan, instrumen validasi storyboard e-modul, instrumen validasi ahli materi dan ahli media, instrumen validasi angket respon siswa dan guru, serta instrumen angket respon siswa dan guru. Dalam validasi prototype media pembelajaran e-modul ini, terdapat tiga orang ahli materi dan tiga ahli media dengan hasil persentase kelayakan materi sebesar 98,81% dengan kriteria ‘Sangat Layak’ dan persentase kelayakan media sebesar 96,33% dengan kriteria ‘Sangat Layak’. Uji coba terbatas terhadap 87 orang siswa dan dua orang guru kimia menghasilkan persentase hasil respon siswa secara keseluruhan sebesar 85,8% dengan kriteria ‘Sangat Layak’. Sementara itu, hasil respon guru secara keseluruhan sebesar 89,99% dengan kriteria ‘Sangat Layak’. Dengan demikian dapat disebutkan bahwa media pembelajaran e-modul berbasis Ispring Suite pada materi laju reaksi yang dikembangkan mendapatkan respon yang positif dari siswa dan guru sehingga layak digunakan sebagai media pembelajaran.

Physical and Chemical Parameters of Water in Cigunung River, Sukabumi, Indonesia Herpi, Aini Nadhokhotani; Saridewi, Nanda
Jurnal Kimia Fullerene Vol 10 No 1 (2025): Fullerene Journal Of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v10i1.710

Penelitian ini bertujuan untuk mengetahui kualitas air Sungai Cigunung, Sukabumi yang meliputi TDS, TSS, pH, DO, BOD dan COD. Pengambilan sampel dilakukan di tiga titik sepanjang Sungai Cigunung, yaitu stasiun 1 (hulu), stasiun 2 (tengah) dan stasiun 3 (hilir). Hasil penelitian menunjukkan bahwa suhu pada ketiga stasiun berkisar antara 23,21°C - 26,62°C; TDS berkisar antara 0,16 mg/l - 0,75 mg/l, pH berkisar antara 7,73 - 7,78; DO berkisar antara 6,4 mg/l - 71 mg/l; nilai TSS pada stasiun 1 dan 2 masing-masing sebesar 0,91 mg/l, dan 0,08 mg/l pada stasiun 3; serta nilai BOD pada stasiun 2 dan 3 masing-masing sebesar 4 mg/l dan 3 mg/l. Berdasarkan hasil analisis parameter air dengan menggunakan baku mutu air PP No. 22 Tahun 2020 diketahui bahwa bagian hulu sungai Cigunung Sukabumi tergolong kelas I yang dapat dimanfaatkan untuk air minum sedangkan bagian tengah dan hilir tergolong kelas II yang dapat dimanfaatkan untuk irigasi pertanian.

The Pengaruh Pembelajaran Berdiferensiasi Terhadap Motivasi Belajar dan Hasil Belajar Siswa Pada Materi Larutan Penyangga Dwie Annisa; Nanda Saridewi; Rizqy Nur Solihat
Journal of Chemistry Sciences and Education Vol 2 No 01 (2025): Journal of Chemistry Sciences and Education
Publisher : PT. Pubsains Nur Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69606/jcse.v2i01.240

This research was conducted due to the low motivation of students in learning chemistry materials caused by learning methods that are not in accordance with their needs. Therefore, a differentiated learning approach is needed that can meet students' learning needs. The purpose of this research was to examine the effect of differentiated learning with the help of PBL model on students' motivation and learning outcomes on buffer solution material. Researchers used pre-experiment method with one group pretest-posttest design and quantitative approach. The research sample used 34 students of class XI SMA Negeri 10 Depok in the even semester of the 2023/2024 academic year, which was selected through purposive sampling. Data was collected through a questionnaire that included 20 statements for learning motivation and formative scores for learning outcomes. The results of hypothesis testing using the Paired Sample T-test showed a Sig. (2-tailed) of 0.000, which means H0 is rejected and H1 is accepted. Based on the test results, it can be concluded that differentiated learning with the help of PBL models has a significant effect on student motivation and learning outcomes.

Green Synthesis of Cu-BDC Nanosheets for Methylene Blue Degradation Saridewi, Nanda; Zulys, Agustino; Bakri, Ridla
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 4 Year 2025 (December 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20458

Metal Organic Frameworks (MOFs) with two-dimensional (2D) nanosheet morphology possess unique surface characteristics, making them highly favourable for photocatalytic applications. This study synthesised Cu²⁺-based MOF nanosheets using a modified three-layer method. This approach is relatively simple, energy-efficient, and qualifies as a green synthesis method. The MOFs were prepared from copper(II) nitrate trihydrate (Cu(NO₃)₂·3H₂O) as the metal precursor and 1,4-benzenedicarboxylic acid (H₂BDC) as the organic linker, aiming to evaluate their photocatalytic activity for methylene blue degradation. The resulting Cu-BDC nanosheets displayed characteristic FTIR absorption bands at 1501 and 1547 cm⁻¹ corresponding to symmetric and asymmetric C=O stretching, 1394 cm⁻¹ for C–O stretching, and peaks at 751 and 569 cm⁻¹ associated with Cu–O vibrations. The XRD analysis revealed four sharp peaks at 2θ values of 8.2°, 10.2°, 16.1°, and 34.1°, indicating good crystallinity with a calculated crystallite size of 22.03 nm, and the bandgap energy is 3.89 eV. Cu-BDC nanosheets exhibit a thin sheet morphology with elemental compositions of carbon 73.08%, oxygen 11.19%, and copper 15.73%. Cu-BDC nanosheets exhibit optimal degradation activity at pH 13, with an optimal catalyst dose of 5 mg and an initial dye concentration of 20 ppm, achieving a degradation capacity of 98.62 mg/g after 120 minutes of reaction. Copyright © 2025 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).

Natural Zeolite as Mo and MoP Catalysts Support for Catalytic Deoxygenation of Jatropha Oil Aziz, Isalmi; Farhan, Muhammad; Saridewi, Nanda; Azizah, Yulyani Nur; Muawanah, Anna; Nurbayti, Siti; Dwiatmoko, Adid Adep; Adhani, Lisa
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 1, May 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i1.45272

Non-edible oil, such as Jatropha oil, is an interesting feedstock for the development of renewable diesel (green diesel). Catalytic deoxygenation using natural zeolite-supported Mo-based catalysts is a promising process for the conversion of Jatropha oil to green diesel. Mo and MoP catalysts supported on natural zeolite were synthesized by wet impregnation at a concentration of 5% (w/w). The catalysts were characterized by XRD, XRF, SAA and NH3-TPD. The catalysts were successfully synthesized with the appearance of Mo and MoP peaks on the catalyst diffractogram. XRF results also showed that Mo and P were present in the catalyst. Metal impregnation decreased the surface area and pore volume of the catalyst, but increased the average pore diameter. The NH3-TPD profile of the catalyst showed that the weak acid sites of both catalysts were larger than the strong acid sites. Based on the activity test of catalytic deoxygenation of Jatropha oil, the MoP/HZ catalyst produced a higher conversion (67%) and liquid product yield (79%) than Mo/HZ. This is associated with a larger pore diameter, so that the distribution of reactants on the catalyst surface is more optimal. However, the highest green diesel selectivity of 82% is produced by the Mo/HZ catalyst. The Mo/HZ catalyst is more oriented towards the HDO reaction, whereas the MoP/HZ catalyst is more oriented towards the DCO/DCO2 reaction.

Development of Science Process Skill (KPS) Assessment in POE (Predict, Observe and Explain) Learning in Acid-Base Titration Gunawan, Ricky; Feronika, Tonih; Saridewi, Nanda
LAVOISIER: Chemistry Education Journal Vol 2, No 1 (2023): LAVOISIER: Chemistry Education Journal
Publisher : UIN Syekh Ali Hasan Ahmad Addary Padangsidimpuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/lavoisier.v2i1.7962

This research was about the development of an instrument assessment of skills the process of science in learning POE (predict, observe and explain) in titration acid bases, in significance this assessment instruments contains aspect of science process skills i.e. aspect of observation, classification, interpretation, prediction, making the question, hypotheses, design experiments, using tools and materials, applying concepts and communicate that categorized on stage learning POE. This assessment instruments was developed to the matter titration acid bases based on the analysis of KD in 2013 curriculum. Research methodology used is DDR (design and development research). The assessment is an instrument developed through 3 stages, namely: (1) study design (concept of a development), (2) stages of development, and (3) stages of evaluation. The purpose of this research is to produce an instrument for skill process of science in learning POE on titration acid base. This research include the development and products finally tested to 22 respondents by 22 students class XI MA Dharma Karya UT, South Tangerang. Based on the data so can be concluded this instrument has characteristics: assessment is organized by using stage POE, now housed assessment ten aspects skill the process of science, now housed assessment discourses whose characteristics are in accordance with matter or the concept of titration acid bases and environment students as well as this assessment use rubrics with scales 0-4 for diplomatic learning can be assessed in detail. Based on the percentage the average from the validation the people of, pilot products and chief responsi teachers, products this assessment get the percentage an average of 84,71 % and into category is very good.

Development of Science Process Skill (KPS) Assessment in POE (Predict, Observe and Explain) Learning in Acid-Base Titration Gunawan, Ricky; Feronika, Tonih; Saridewi, Nanda
LAVOISIER: Chemistry Education Journal Vol 2, No 1 (2023): LAVOISIER: Chemistry Education Journal
Publisher : UIN Syekh Ali Hasan Ahmad Addary Padangsidimpuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/lavoisier.v2i1.7962

This research was about the development of an instrument assessment of skills the process of science in learning POE (predict, observe and explain) in titration acid bases, in significance this assessment instruments contains aspect of science process skills i.e. aspect of observation, classification, interpretation, prediction, making the question, hypotheses, design experiments, using tools and materials, applying concepts and communicate that categorized on stage learning POE. This assessment instruments was developed to the matter titration acid bases based on the analysis of KD in 2013 curriculum. Research methodology used is DDR (design and development research). The assessment is an instrument developed through 3 stages, namely: (1) study design (concept of a development), (2) stages of development, and (3) stages of evaluation. The purpose of this research is to produce an instrument for skill process of science in learning POE on titration acid base. This research include the development and products finally tested to 22 respondents by 22 students class XI MA Dharma Karya UT, South Tangerang. Based on the data so can be concluded this instrument has characteristics: assessment is organized by using stage POE, now housed assessment ten aspects skill the process of science, now housed assessment discourses whose characteristics are in accordance with matter or the concept of titration acid bases and environment students as well as this assessment use rubrics with scales 0-4 for diplomatic learning can be assessed in detail. Based on the percentage the average from the validation the people of, pilot products and chief responsi teachers, products this assessment get the percentage an average of 84,71 % and into category is very good.

ANALYSING TRADITIONAL ISLAMIC BOARDING SCHOOL STUDENTS SCIENTIFIC LITERACY USING PISA FRAMEWORK Ramli, Munasprianto; Saridewi, Nanda; Rifki, Abdul
JPPIPA (Jurnal Penelitian Pendidikan IPA) Vol. 6 No. 1 (2021): Juni 2021
Publisher : Universitas Negeri Surabaya in collaboration with Perkumpulan Pendidik IPA Indonesia (PPII)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jppipa.v6n1.p31-39

The study aims to determine the scientific literacy ability of class IPA 11th grade students at traditional Islamic boarding schools using the 2015 PISA framework. Descriptive quantitative method used for this research. The research was conducted at two traditional Islamic boarding schools in South Tangerang called the Jamiyah Islamiyah Islamic Boarding School and the Madinatunnajah Islamic Boarding School. The research sample consisted of 57 students consisting of 33 students of the Jamiyah Islamiyah Islamic Boarding School and 24 students of the Madinatunnajah Islamic Boarding School chosen using a purposive sampling technique. The written test used is a test that distributed at PISA 2012 and 2015 which focus on two main domains of PISA 2015 scientific literacy, namely the domain of competence and knowledge. The results of this study indicate that the scientific literacy skills of students in Islamic boarding schools using the 2015 PISA framework are still "low" with an average percentage of scientific literacy obtained of 29.03%.

Synthesis of Cu-PTC (Perylene 3,4,9,10-tetracarboxylate) Metal-Organic Framework (MOF) for Methylene Blue Photodegradation Mala, Farhah Syahidatul; Saridewi, Nanda; Nurbayti, Siti; Adawiah, Adawiah; Zulys, Agustino
Bulletin of Chemical Reaction Engineering & Catalysis 2026: BCREC Volume 21 Issue 2 Year 2026 (August 2026)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20525

Disposal of synthetic dye waste, including methylene blue, has been increasing in recent years. The photocatalytic method is an effective approach for degrading dyes, using Metal–Organic Frameworks (MOFs) as catalysts and light as the energy source. This study aims to synthesize Cu-PTC MOF as a photocatalyst and evaluate its performance in degrading methylene blue dye. Cu-PTC was synthesized using Cu(NO3)2.3H2O and perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) via a solvothermal method. The resulting MOF was characterized using X-ray Diffraction (XRD), Ultraviolet–Visible Diffuse Reflectance Spectroscopy (UV-Vis DRS), Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscopy (SEM). Cu-PTC exhibits a bandgap energy of 1.72 eV and characteristic functional groups at wavenumbers 1689 cm-1 (C=O), 1590 cm-1 and 1360 cm-1 (-COO), 3450 cm-1 (O-H), and 738 cm-1 and 654 cm-1 (Cu-O). The Cu-PTC MOF has a crystallinity degree of 85.35%, a crystal size of 35.33 nm, and a rod-like surface morphology. Under visible light irradiation, it achieves an optimum degradation efficiency of 71.45%, with an adsorption capacity of 73.28 mg/g for methylene blue dye at a concentration of 50 ppm, using 25 mg of Cu-PTC MOF at pH of 7 over a period of 60 minutes. Copyright © 2026 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).

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