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All Journal JFA (Jurnal Fisika dan Aplikasinya) Science and Technology Indonesia Journal of Science and Applicative Technology Jurnal Sylva Lestari Greensusmater
Rianjanu, Aditya
Department Of Materials Engineering, Faculty Of Industrial Technology, Sumatera Institute Of Technology (ITERA), Lampung 35365, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics

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Effect of calcination temperature on the performance of hydrothermally grown cerium dioxide (CeO2) nanorods for the removal of Congo red dyes Rianjanu , Aditya; Nuraeni , Resti; Aflaha , Rizky; Khamidy , Nur Istiqomah; Triyana , Kuwat; Taher , Tarmizi
Greensusmater Vol. 1 No. 1 (2024): Inaugural issue
Publisher : Green and Sustainable Materials Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62755/greensusmater.2024.1.1.9-14

Abstract

This study investigates the transformation of CeO2 nanostructures through various calcination temperatures and their subsequent impact on morphological, structural, and photocatalytic properties. X-ray diffraction (XRD) analysis reveals the presence of cerium oxycarbonate in the uncalcined samples, transitioning to a face centered cubic CeO2 phase post-calcination at 500°C. The scanning electron microscopy (SEM) imaging delineates a morphological evolution from distinct, rod-like structures in the uncalcined state to sintered, agglomerated forms as calcination temperatures ascend from 500°C to 800°C. The crystallite size, calculated using Scherrer's Equation, displayed a proportional increase with temperature. The photocatalytic degradation of Congo red dye under UV light was analyzed using UV-Vis spectroscopy, with the calcined samples exhibiting varying degrees of adsorption and photocatalytic activity. The study found that higher calcination temperatures correlate with increased photocatalytic performance, potentially due to enhanced crystallinity. This assertion is supported by pseudo-first-order kinetic modeling, indicating improved photocatalytic efficiency with higher calcination temperatures, underlined by increasing rate constants. These findings underscore the intricate relationship between calcination-induced morphological and structural changes and the photocatalytic prowess of CeO2 nanostructures.
Emerging trends and future perspectives in adsorption technologies for water and wastewater treatment: A sunrise or sunset horizon? Taher , Tarmizi; Rianjanu , Aditya
Greensusmater Vol. 1 No. 1 (2024): Inaugural issue
Publisher : Green and Sustainable Materials Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62755/greensusmater.2024.1.1.1-8

Abstract

Adsorption technology has been a focal point of water and wastewater treatment engineering research for over a century, yielding numerous scientific publications. These studies have primarily concentrated on developing efficient adsorbent materials, understanding adsorption mechanisms and characteristics, and investigating the removal of conventional or emerging pollutants. A common objective cited in most of these reports is the practical application of the adsorption process in municipal water or wastewater treatment plants, aiming to enhance water quality and safety. However, the majority of these studies overlook issues related to technology transfer, thereby widening the gap between academic recommendations and their practical implementation in industry. In this review, we trace the evolution of adsorption technology in water and wastewater treatment, evaluating its application viability and highlighting the approaches that hold the greatest promise for the future. Furthermore, we propose strategies for scientists and engineers dedicated to advancing research efforts that translate into industrially viable adsorption technologies for water treatment. While the practical effectiveness of adsorption technologies may not fully align with academic enthusiasm, this critical evaluation should not dismiss their potential as future technology since adsorption retains significant and distinct advantages that merit further exploration.
Development and materials characterization of hydrothermally grown niobium-doped BiVO4 for ciprofloxacin and methylene blue degradation Kurnia, Nadiya Rifqah; Amanda, Tia; Nurfitria, Rima; Aflaha, Rizky; Widakdo, Januar; Rianjanu, Aditya
Greensusmater Vol. 2 No. 2 (2025)
Publisher : Green and Sustainable Materials Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62755/greensusmater.2025.2.2.55-61

Abstract

This study reports the synthesis and characterization of niobium-doped BiVO4 (NbX-BiVO4, X = 0, 2, 4, 6 mol%) photocatalysts via a hydrothermal method, aimed at enhancing the degradation of organic pollutants under UV irradiation. X-ray diffraction (XRD) analysis confirmed the preservation of the monoclinic BiVO4 structure in all samples, although minor secondary features were detected in doped compositions. Field emission scanning electron microscope (FESEM) imaging revealed progressively rougher, nanostructured surfaces with increasing Nb content, while UV-Vis and photoluminescence (PL) spectroscopy indicated modified band structures and reduced recombination rates. Photocatalytic performance was evaluated using ciprofloxacin (CIP) and methylene blue (MB) as model pollutants. For CIP, the highest activity was achieved by Nb6-BiVO4 (k value of 0.09 min‒1 g–1), attributable to enhanced charge separation and increased surface texture. In contrast, MB degradation favored the undoped BiVO4 (k value of 0.29 min‒1 g–1) due to stronger dye adsorption, despite the optical improvements in doped samples. The findings demonstrate that Nb doping improves BiVO4 photocatalytic activity through synergistic structural and electronic effects, with pollutant-specific responses highlighting the importance of matching catalyst design to target contaminant properties.
Niobium oxide electrode performance boosted by molybdenum doping and calcination for supercapacitor applications Al Mubarok, Muhammad Ramadhan; Nurfitria, Rima; Aflaha, Rizky; Nurfani, Eka; Rianjanu, Aditya
Greensusmater Vol. 2 No. 2 (2025)
Publisher : Green and Sustainable Materials Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62755/greensusmater.2025.2.2.62-69

Abstract

Niobium pentoxide (Nb2O5) is a promising pseudocapacitive material for supercapacitor applications due to its high theoretical capacitance and electrochemical stability. However, its practical performance is limited by low electrical conductivity and poor ion transport kinetics. In this work, we report the enhancement of Nb2O5 electrode performance through molybdenum (Mo) doping and thermal calcination. Mo-doped Nb2O5 nanostructures were synthesized via a hydrothermal method followed by calcination at 500 °C. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) confirmed a rougher morphology and homogeneous Mo distribution in the doped sample. X-ray diffraction (XRD) revealed a structural transformation from a deformed orthorhombic phase in pristine Nb2O5 to a more crystalline pseudohexagonal phase in Mo-Nb2O5-500. Electrochemical analysis demonstrated a significant improvement in capacitive behavior, with Mo-Nb2O5-500 achieving a specific capacitance of 55.3 F/g at 5 mV/s, which is five times higher than the undoped sample. All electrodes exhibited stable cycling performance. These results highlight the synergistic role of Mo doping and calcination in enhancing the electrochemical properties of Nb2O5, offering a viable approach for developing high-performance pseudocapacitor electrodes.
Co-Authors Aflaha , Rizky Aflaha, Rizky Al Mubarok, Muhammad Ramadhan Amanda, Tia Anawati Anawati Anrokhi, M.S. Augustina, Sarah Bimo Winardianto Buya, Dheace Gracesela Canggih Setya Budi Chotimah Chotimah Chotimah, Cindy Dini Lestari, Dini Eka Nurfani Fadly Azril Priodani Fahmi, Achmad Gus Firdaus, Azka R. Hadi Teguh Yudistira, Hadi Teguh Haloho, Trivendi Hannah Faye M. Austria Indriana Kartini Januar Widakdo Kadja, G.T.M. Khamidy , Nur Istiqomah Kurnia, Nadiya Rifqah Kuwat Triyana Lubis, Muhammad Adly Rahandi Maulana, Muhammad Iqbal Maulana, Sena Melany Febrina Misbachul Munir Muhtar, Sephia Amanda Munandar, Andika Mustaqim, A. Naim, Naufaldin Adam Nuraeni , Resti Nurfitria, Rima Pasaribu, Joshua Leonardo Putri Maharani Rio Ardiansyah Murda Sarah Agustina Sena Maulana Sidiq, Ahmad Nur Sipahutar, W.S. Sipahutar, Wahyu Solafide Suwanda, Astri Aulia Taher , Tarmizi Tarmizi Taher Tarmizi Taher Triyadi, Dedi Triyana , Kuwat Tsung Han-Huang Wahyu Hidayat Wahyu Hidayat Wei-Song Hung Yazid Bindar