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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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Journal : Bulletin of Chemical Reaction Engineering

 1 
Ag-TiO2 for Efficient Methylene Blue Photodegradation Under Visible Light Irradiation Widiyandari, Hendri; Nashir, Muhammad; Parasdila, Hanaiyah; Almas, Khanza Fadhilah; Suryana, Risa
Bulletin of Chemical Reaction Engineering & Catalysis 2023: BCREC Volume 18 Issue 4 Year 2023 (December 2023)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.19885

Abstract

Photocatalysis is one of the environmentally friendly methods for degrading down wastewater contamination. TiO2 as one of the photocatalyst material is claimed can enhance the photocatalytic activity much better, if the band gap energy is reduced. In order to reduce the bandgap energy of TiO2, the novel in this research is that the temperature variations over a 24-hour period at 100 °C, 120 °C, 140 °C, and 160 °C in hydrothermal process to synthesize the photocatalyst material with Ag-doped. Diffraction patterns of Ag-TiO2 show that all sample have tetragonal crystal structure and an anatase phase which also has excellent crystallinity. Some of the nanoparticles on the surface of Ag-TiO2 have a consistent morphology, while other particles are formed irregularly. According to the DRS UV-Vis result, bandgap energy reduced as temperature increased (Eg = 3.2 eV to 2.32 eV). The results from PL Ag-TiO2 160 have the lowest intensity, which indicates a low rate of electron-hole recombination. The Ag-TiO2 160 sample produced the best photocatalytic activity, according to the results of the MB degradation test, with a relative change in concentration of 92.98% for 2 h under visible light. 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). 
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) (Issue in Progress)
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).
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