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Taher , Tarmizi
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Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Materials Science & Nanotechnology

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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.
Co-Authors Aflaha , Rizky Khamidy , Nur Istiqomah Nuraeni , Resti Rianjanu, Aditya Triyana , Kuwat