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Methylene Blue Degradation with Sulfonated SPG20 Silica-Fe₂O₃ Hybrid Photocatalysts Ulfa, Maria; Salsabila, Pramesta Rosa; Saputro, Agung Nugroho Catur; Nurharyati, Nanik Dwi
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 3 Year 2025 (October 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20380

This study aims to synthesize and evaluate the photocatalytic performance of a modified mesoporous silica-based composite, Fe₂O₃/SPG₂₀–SO₃H, for methylene blue degradation. The catalyst was prepared via a soft-template method using P123 surfactant and gelatin as dual structure-directing agents. Characterization results confirmed the formation of Fe₂O₃ crystallites with a dominant size of 2.14 nm and crystallinity of 90.85%. FTIR spectra revealed the presence of –COOH, Si–O–Si, Si–OH, and –OH groups, while sulfonate-related bands (–SO₃H, O=S=O) were not observed in XRD patterns, suggesting amorphous or poorly crystalline sulfonic groups. SEM analysis indicated rod-like catalyst morphology. Photocatalytic testing under various temperatures showed that Fe₂O₃/SPG₂₀–SO₃H achieved the highest degradation efficiency at 70 °C, maintaining over 92.14 % efficiency for up to 120 minutes of contact time. Lower temperatures (5 °C and 15 °C) led to reduced and less stable degradation activity. These results indicate that both sulfonation and iron oxide impregnation, combined with optimal operating temperature, significantly enhance the photocatalytic performance of mesoporous silica systems, offering a cost-effective and environmentally friendly solution for dye-contaminated wastewater treatment. 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).

Inquiry based experiments to enhance sustainability literacy: A systematic literature review and bibliometric analysis Shidiq, Ari Syahidul; Huda, Zamira Zia'ul; Yamtinah, Sri; Ulfa, Maria; Masykuri, Mohammad; Saputro, Agung Nugroho Catur
Journal of Environment and Sustainability Education Vol. 3 No. 2 (2025)
Publisher : Education and Development Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62672/joease.v3i2.98

This study aims to explore inquiry-based experiments' educational aspects, levels of inquiry, and contributions to sustainability literacy. In this study, a systematic literature review and bibliometric analysis were used. A systematic literature review in this study used a PRISMA flow diagram, and the bibliometric analysis was conducted using VOS Viewer. Using systematic literature review 79 articles were analyzed, focusing on three main aspects: pedagogy/education, levels of inquiry, and sustainability literacy. A bibliometric analysis was also used in this study. A RIS format of articles was compiled and then used for the bibliometric analysis using VOSviewer. The bibliometric analysis focused on network overlay, density visualization, and author and co-author relationships. The results of this study indicate that inquiry-based experiments significantly enhance students' understanding of scientific concepts, motivation, and essential scientific skills such as hypothesis formulation, experiment design, data collection, and analysis. This literature review also reveals a gap in integrating sustainability literacy into inquiry-based experiments. Although some studies have incorporated green chemistry principles and real-world applications, only a few explicitly promote sustainability literacy. This underscores an opportunity for future research to design inquiry-based experiments that more directly address sustainability literacy.

Inquiry based experiments to enhance sustainability literacy: A systematic literature review and bibliometric analysis Shidiq, Ari Syahidul; Huda, Zamira Zia'ul; Yamtinah, Sri; Ulfa, Maria; Masykuri, Mohammad; Saputro, Agung Nugroho Catur
Journal of Environment and Sustainability Education Vol. 3 No. 2 (2025)
Publisher : Education and Development Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62672/joease.v3i2.98

This study aims to explore inquiry-based experiments' educational aspects, levels of inquiry, and contributions to sustainability literacy. In this study, a systematic literature review and bibliometric analysis were used. A systematic literature review in this study used a PRISMA flow diagram, and the bibliometric analysis was conducted using VOS Viewer. Using systematic literature review 79 articles were analyzed, focusing on three main aspects: pedagogy/education, levels of inquiry, and sustainability literacy. A bibliometric analysis was also used in this study.Â A RIS format of articles was compiled and then used for the bibliometric analysis using VOSviewer. The bibliometric analysis focused on network overlay, density visualization, and author and co-author relationships. The results of this study indicate that inquiry-based experiments significantly enhance students' understanding of scientific concepts, motivation, and essential scientific skills such as hypothesis formulation, experiment design, data collection, and analysis. This literature review also reveals a gap in integrating sustainability literacy into inquiry-based experiments. Although some studies have incorporated green chemistry principles and real-world applications, only a few explicitly promote sustainability literacy. This underscores an opportunity for future research to design inquiry-based experiments that more directly address sustainability literacy.

Enhancing creativity skills and student learning outcomes through the implementation of creative problem solving model with mind mapping on salt hydrolysis topic Sari, Bella Windira; Ariani, Sri Retno Dwi; Shidiq, Ari Syahidul; Mulyani, Bakti; Yamtinah, Sri; Masykuri, Mohammad; Ulfa, Maria; Saputro, Agung Nugroho Catur
Jurnal Pendidikan Kimia Vol. 16 No. 2 (2024): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i2.58765

In the face of increasing demands for 21st-century skills, chemistry education must advance to better support students in developing problem-solving abilities. Effective chemistry learning models are crucial in addressing this need. This study examines the impact of the Creative Problem Solving (CPS) model, equipped with the Mind Mapping method, on students' creative thinking skills and cognitive learning outcomes in salt hydrolysis. A quasi-experimental method with a pretest-posttest control group design was used in this research. Cluster random sampling was employed for sample selection. The sample consisted of 72 students from a school in Surakarta City. Data were collected using a test instrument with eight essay questions to assess creative thinking skills and six essay questions to evaluate cognitive learning outcomes. Non-parametric statistical tests were utilized for data analysis. The results of the Kruskal-Wallis™s test produce sig. (0.000 < 0.05) which means the hypothesis is accepted. The results showed that applying the CPS learning model with mind mapping affected students' creative thinking skills and cognitive learning outcomes so that it can be used as an alternative learning model to improve 21st-century skills. This research contributes new insights into applying the Mind Mapping-assisted CPS learning model for chemistry education.

Aiken index-based content validity analysis of argumentation skills and sustainability literacy instruments in STEM-based green chemistry learning Ardhany, Amellia; Shidiq, Ari Syahidul; Yamtinah, Sri; Masykuri, Mohammad; Saputro, Agung Nugroho Catur
Indonesian Journal of Science and Mathematics Education Vol. 9 No. 1 (2026): Indonesian Journal of Science and Mathematics Education
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/qdb62402

This study aims to analyze the content validity of instruments measuring argumentation skills and sustainability literacy in STEM learning on green chemistry materials using the Aiken index. This study uses a quan titative design with validation carried out through focused group discussions (FGD) involving eight experts, including five chemistry education lecturers, as well as three high school chemistry teachers, to evaluate the quality of the developed instruments. The instruments included pretest and posttest questions (multiple-choice and essay), questionnaires, observation sheets, product assessment sheets, teaching modules, and student worksheets. Eight expert validators assessed the content, language, and presentation aspects using a Likert scale. The results of the expert assessments were analyzed using the Aiken index to determine the content validity of each item. The findings showed that all instruments achieved Aiken index values of ≥ 0.75, indicating high content validity. These results suggest that the developed instruments are valid and feasible for use in STEM-based green chemistry learning. The implications of this study highlight that the validated instruments can effectively support the measurement of students’ conceptual understanding, argumentation skills, and sustainability literacy, thereby strengthening the integration of STEM approaches in chemistry education.

The Impact of the Common Knowledge Construction Model (CKCM) Integrated with Ethnoscience and Podcasts on Science Process Skills in the Topic of Chemical Bonding Nurlatifah, Viki; Masykuri, Mohammad; Ciptonugroho, Wirawan; Yamtinah, Sri; Ulfa, Maria; Mulyani, Bakti; Saputro, Agung Nugroho Catur; Shidiq, Ari Syahidul
International Journal of Pedagogy and Teacher Education Vol 8, No 1 (2024): International Journal of Pedagogy and Teacher Education - April
Publisher : The Faculty of Teacher Training and Education (FKIP), Universitas Sebelas Maret, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ijpte.v8i1.87665

Technological advances and competition in the 21st-century demand that students enhance their knowledge and skills. The Common Knowledge Construction Model (CKCM) can effectively influence students' academic skills and achievements in chemistry. This study examined the impact of CKCM integrated with ethnoscience and podcasts on improving science process skills and student learning outcomes. A quasi-experimental design with cluster random sampling was employed to select experimental and control groups from the population of specialization 11th-grade science program (five classes) in a senior high school in Boyolali Regency. Multiple-choice questions were used to measure science process skills and learning outcomes. Descriptive analysis and hypothesis testing were conducted using the Kruskal-Wallis test. The results revealed a significance value of 0.000 in both hypothesis tests for science process skills and learning outcomes. A significance value of less than 0.05 indicates that the application of CKCM positively impacts both variables. Integrating ethnoscience provides a deeper understanding by building culturally contextualized logical thinking. Supported by podcast media, it creates a dynamic and engaging learning environment that helps students actively construct their knowledge. This research contributes to developing the CKCM learning model mediated by podcasts to empower chemistry knowledge and science process skills, preparing students to meet the challenges of the 21st century.

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