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All Journal POSITRON PRISMA FISIKA Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Journal of Engineering and Technological Sciences Phi : Jurnal Pendidikan Fisika dan Terapan Jurnal Surya Masyarakat Jurnal Ilmiah Ecosystem Jurnal Rekayasa Energi dan Mekanika JRFES Newton-Maxwell Journal of Physics Prosiding Simposium Nasional Multidisiplin (SinaMu) Wahana Fisika : Jurnal Fisika dan Terapannya
Asifa Asri
Univeristas Tanjungpura
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Physics Public Health Social Sciences Other

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Utilization of Zn Powder as a Precursor in Synthesis of rGO/ZnO Composite for Decolorization of Batik Wastewater Wahyuni, Dwiria; Mariani, Mariani; Asri, Asifa; Arsyad, Ya Muhammad
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 15 No. 1 (2025)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v15n1.p12-26

Abstract

Batik wastewater contains high concentrations of synthetic dyes, significantly contributing to aquatic pollution. Photocatalysis is a promising method for degrading such dyes in textile effluents. This study aims to develop rGO/ZnO composites using zinc (Zn) powder as a precursor for photocatalytic applications. Reduced graphene oxide (rGO) was used as a substrate for ZnO particle formation. The composites were prepared by reacting Zn powder with rGO at varying loadings (5% and 10% by mass) in a neutral aqueous solution, followed by thermal treatment at 250 °C for 1 hour to facilitate Zn oxidation. The photocatalytic performance was evaluated by applying different masses of rGO/ZnO (0.2, 0.4, and 0.8 g) to degrade batik wastewater. Surface morphology and elemental composition were characterized using SEM-EDS. SEM analysis showed that rGO has a sheet-like structure, while ZnO exhibits spherical morphology. EDS confirmed the presence of Zn, C, and O as major elements with Nb impurity was identified in the composite. The carbon-to-oxygen (C/O) ratio increased after composite formation, reaching 4.23 for rGO/ZnO 5% and 3.79 for rGO/ZnO 10%. XRD characterization of rGO/ZnO confirms the presence of ZnO in the composite, with residual Zn peaks indicating incomplete oxidation of the Zn precursor. Photocatalytic activities modeled using pseudo-first-order kinetics reveal the 10% rGO/ZnO composite (0.8 g) shows the degradation efficiency of 67.91%, with a rate constant of 0.1623 h⁻¹. The efficiency may be affected by the complex nature of batik wastewater, particularly wax and resin residues that hinder photocatalytic activity. In conclusion, these findings highlight the potential of Zn powder as a precursor in the synthesis of rGO/ZnO composites with concentration of rGO and the mass variation of rGO/ZnO in the treatment of Batik wastewater affect the photocatalytic activity.
Co-Authors Afiana, Syarifah Zulfa Aji, Renold Sasmita Amalia, Nadya Andi Ihwan Angie Islammiyati Apriyanti Apriyanti Arief, Ilham Lazuardy Arsyad, Ya Muhammad Asni Asni Azrul Azwar Bintoro Siswo Nugroho Boni Pahlanop Lapanporo Cindy Ayu Lestary Damawidjaya Biksono Dwiria Wahyuni Faisal Faisal Fatisa, Huril Haryanti, Nida Hasanuddin Hasanuddin Hazlina Hazlina Heri Widiantoro Ica Sendawati Irfana Diah Faryuni Irfana Diah Faryuni Kasari, Dila Khaidar, Hafidh Rayana Kornelia, Yenniarti Lestari, Tri Gunarti Liana, Tila Malino, Mariana B Malino, Mariana Bara'allo Mamat Rokhmat Mariana B. Malino Mariana Bara'allo Malino Mariani Mariani Marjuki Marjuki Mawena, Doni Mega Nurhanisa Meliana Meliana Mentarie Resthu Putri Mikrajuddin Abdullah Mikrajuddin Abdullah Muhammad Agus Muljanto Mustafa, Usliana Nadya Amalia Nia Daniati Nurhasanah Nurhasanah Nurhasanah Nurhasanah pahmi, mayana Rahmadhani, Nur Winda Ridayani, Dien Rokayah Rokayah S. Sutisna Simanjuntak, Sinur Agustina Br Sinaga, Dian Tarni Siti Helmyati Sparisoma Viridi Sulastri, Heni Sutisna, S. Thefany, Thefany Uray Monica Wulandari Wahyu Hidayat WANTI, SARI Wirawan Piseno Wirawan Piseno Wulan Kusuma Wardani Wulandari, Tiwuk Yudha Arman Yusman Putra Zulfian Zulfian