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All Journal VALENSI Sriwijaya International Seminar on Energy-Environmental Science and Technology Indonesian Journal of Chemistry ASEAN Journal of Community Engagement Jurnal Teknik Kimia Indonesia International Journal of Renewable Energy Development
Bambang Heru Susanto, Bambang Heru
Departemen Teknik Kimia Fakultas Teknik Universitas Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Public Health Social Sciences Other

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Journal : International Journal of Renewable Energy Development

 1 
Development of WO3/TiO2-NT/Ti photoanode for simultaneously POME degradation, electricity generation, and hydrogen production in a photocatalysis-fuel cell system Bachri, M. Febriansyah; Husein, Saddam; Susanto, Bambang Heru; Ratnawati, Ratnawati; Slamet, Slamet
International Journal of Renewable Energy Development Vol 14, No 3 (2025): May 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.60978

Abstract

This research presents a WO₃/TiO₂-NT/Ti photoanode for processing POME waste as well as producing electricity and hydrogen simultaneously. The photoanode in the form of nanocomposites was synthesized using an in-situ anodization method and characterized using Field Emission Scanning Electron Microscopy with Energy Dispersive X-ray (FESEM-EDX), X-ray Diffraction (XRD), Photoluminescence Spectroscopy (PL-Spectra), photocurrent transient, X-ray Photoelectron Spectroscopy (XPS), and UV-Visible Diffuse Reflectance Spectroscopy (UV-Vis DRS). The results showed that the WO₃/TiO₂-NT/Ti photoanode with 0.3 g of WO₃ precursor added during anodization exhibited the best PFC performance. The system achieved a COD degradation of 84%, hydrogen production of 11.18 mmol/m², and a maximum power density of 0.0375 mW/cm² under visible light irradiation, outperforming the variations with 0.5 g and 0.78 g WO₃ precursor. The enhanced performance was attributed to the formation of a heterojunction between WO₃ and TiO₂, as confirmed by characterization results and performance tests in COD degradation, electricity generation, and hydrogen production. Meanwhile, the addition of 0.5 g and 0.78 g WO₃ precursor reduced photocatalytic performance, likely due to excessive Na₂WO₄·2H₂O during anodization, which could partially cover the active TiO₂-NT/Ti surface and alter the electrochemical oxidation process. The developed WO₃/TiO₂-NT/Ti photoanode offers a promising solution for simultaneous wastewater treatment, clean hydrogen production, and electricity generation, with potential applications in sustainable palm oil processing industries and future renewable energy technologies.
Seawater utilization through hybrid photocatalysis-electrocoagulation process using pumice-supported g-C3N4/BiOBr for hydrogen production and methylene blue decolorization Sudianto, Julius Rainer; Pratiwi, Reno; Susanto, Bambang Heru; Slamet, Slamet
International Journal of Renewable Energy Development Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61722

Abstract

This study investigated the simultaneous photocatalysis-electrocoagulation process using pumice-supported g-C3N4/BiOBr nanocomposites in seawater treatment to remove organic pollutants and generate hydrogen gas. The photocatalyst nanocomposite was synthesized via coprecipitation and immobilized on the pumice surface to enhance light exposure and facilitate catalyst recovery. The performance of the hybrid system was evaluated under various operational parameters, including applied voltage, seawater concentration, and pH. The results showed that the combined process outperformed the individual photocatalysis and electrocoagulation systems. Optimal performance was achieved at pH 3 and 15% seawater concentration, resulting in 99.37% methylene blue decolorization and 211 mL of hydrogen within 2 hours. At higher salinities and lower pH, increased coagulant formation caused a shadowing effect, limiting photocatalytic efficiency despite continued hydrogen evolution. The XPS (X-Ray Photoelectron Spectroscopy) characterization of the photocatalyst material, demonstrated the successful formation of a nanocomposite with a stable surface chemistry. Photoluminescence analysis confirmed that the charge separation mechanism could be enhanced, suppressing the recombination rate and being the primary reason for the enhanced photocatalysis process, although interfacial electronic interactions remained limited. Overall, this study demonstrates that the pumice-supported g-C₃N₄/BiOBr photocatalyst integrated with electrocoagulation provides an effective and stable platform for seawater-based hydrogen production and organic pollutant removal.
Co-Authors Adriana, Elva Dissa Agustino Zulys Arif Rahman Ayuko Cheeryo Sinaga Bachri, M. Febriansyah Dedy Alharis Nasution, Dedy Alharis Eny Kusrini F Fransisca Fajar Rakhman Wibowo Gita Agitia Fransisca Haidir, Banu Muhammad Istiqomah, Muhsinatul Lisa Adhani M. Nasikin Maya Lukita, Maya Misri Gozan Mohammad Nasikin Muhammad Nasikin Ratnawati Ratnawati Reno Warni Pratiwi Riandy Putra S Sukirno Saddam Husein, Saddam Shella Wu, Shella Slamet . Sudianto, Julius Rainer Syauqi, Muhammad Iqbal Teguh Wikan Widodo, Teguh Wikan Witri Wahyu Lestari Yusraini Dian Inayati Siregar