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All Journal Jurnal Neutrino : jurnal fisika dan aplikasinya JURNAL FISIKA JFA (Jurnal Fisika dan Aplikasinya) Jurnal Penelitian Pendidikan IPA (JPPIPA) Molekul: Jurnal Ilmiah Kimia Proceeding Seminar Nasional IPA Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Sains Materi Indonesia Jurnal Pendidikan IPA Indonesia Journal of Engineering and Technological Sciences International Journal of Science, Technology and Applications
Risa Suryana
Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Sebelas Maret, Jl. Ir. Sutami No. 36 A Kentingan, Surakarta 57126
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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Eco-Friendly Synthesis of ZnO/CQD Photocatalysts from Waste Milk for Myclobutanil Degradation under Visible Light Widiyandari, Hendri; Prilita, Orien; Parasdila, Hanaiyah; Suryana, Risa; Arutanti, Osi
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.20532

Abstract

Pesticides play a vital role in maintaining the global food supply amid rising agricultural demand and the adverse effects of climate change on crop productivity. Among them, myclobutanil, a triazole-based compound, is commonly used to safeguard plants against fungal diseases. The chemical compounds produced from the high toxicity, mobility, and persistence of pesticides in water can have harmful environmental effects. Food/organic waste has recently gained attention for its potential use in material research, one of them is stale milk. Stale milk contains lactic acid, which can be utilized as a carbon precursor for preparing carbon quantum dot (CQD). In this study, a ZnO/CQD composite photocatalyst was successfully synthesized using CQD derived from stale milk through a green hydrothermal method. The photocatalytic activity of ZnO/CQD in degrading the pesticide myclobutanil was confirmed after 120 min, achieving a degradation efficiency of 30% while ZnO only 18% under visible light, demonstrating its potential as an excellent photocatalyst candidate for the removal of organic pollutants. 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).
Characteristics and Photocatalytic Performance of Coprecipitation Praseodymium (Pr)-doped Strontium Titanate for Methylene Blue Degradation Khoiria, Salsa Nurul; Sandi, Dianisa Khoirum; Nurosyid, Fahru; Suryana, Risa; Iriani, Yofentina
Jurnal Sains Materi Indonesia Vol. 27 No. 2 (2026): Jurnal Sains Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2026.13450

Abstract

Strontium titanate (SrTiO₃ or STO) is a perovskite material with promising photocatalytic properties for wastewater degradation. Doping with rare-earth elements such as praseodymium (Pr) can enhance its performance by modifying structural and electronic characteristics. In this study, Pr-doped STO (Sr1-xPrxTiO3, x = 0%, 2%, and 4%) was synthesized via the coprecipitation method. X-ray diffraction (XRD) confirmed a single-phase perovskite structure with high crystallinity, while Fourier transform infra-red (FTIR) analysis verified the formation of Sr–Ti–O bonds. Particle size analysis (PSA) and surface area analysis (SAA) with the Brunauer-Emmett-Teller (BET) method revealed that higher Pr concentrations reduced particle size and increased surface area. Photocatalytic activity was evaluated using methylene blue (MB) degradation under ultraviolet (UV) irradiation for up to 5 hours. The Sr0.98Pr0.02TiO3 sample exhibited the best performance, achieving 73.08% MB degradation after 5 hours, demonstrating the effectiveness of moderate Pr doping in enhancing photocatalytic activity
Co-Authors - Anita, - Affandy, Harry Agus Supriyanto Agustina, Silvia Nurlaili Ali, Lalu Usman Alias, Yatimah Binti Almas, Khanza Fadhilah Andiena, Resty Zama Annur Indra Kusumadani Arutanti, Osi Cari, Cari Chusnana Insyaf Yogiyanti Daru Wahyuningsih Fahru Nurosyid Haqiqi, Haqiqi Harjana Harjana Hendri Widiyandari Khoiria, Salsa Nurul Kusumandari, Kusumandari Markus Diantoro Maya Dwi Fistiani Muhammad Nashir Mustikasari, Ayu Azrurin Nandang Mufti Nasikh Nurussaniah Nurussaniah Pangesti, Desita Suci Parasdila, Hanaiyah Permatasari, Honesty Hidayah Nur Prilita, Orien Pusaka, Semerdanta Sandi, Dianisa Khoirum Sehati, Sehati - Suharno Taher, Tamrin Titian, Kharisma Widha Sunarno Wijayanti, Siti Yofentina Iriani