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All Journal Indonesian Journal of Science and Technology
Noorfidza Yub Harun
Universiti Teknologi PETRONAS
Computer Science & IT Environmental Science

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Modification of Kaolin with Carbon Quantum Dots as Composite for Methylene Blue Removal: Literature Review and Experiment Nonni Soraya Sambudi; Yuvan Sithambaran; Khee Chung Hui; Muhammad Wahyu Nugraha; Norashikin Ahmad Kamal; Noorfidza Yub Harun; Suriati Sufian
Indonesian Journal of Science and Technology Vol 7, No 2 (2022): IJOST: VOLUME 7, ISSUE 2, September 2022
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v7i2.50810

Abstract

The modification of kaolin with nano-size fillers has exhibited excellent performance in the adsorption process. Carbon quantum dots (CQDs) are the new generation of nanoparticles that have attracted interest for their utilization as modifiers. In this study, a composite of metakaolin(MK)/CQDs was synthesized and tested for methylene blue (MB) removal. The heating and acid-alkali treatment of kaolin transformed it into MK. The interaction between MK and CQDs was analyzed using XPS to detect the binding of pyridic NH2 and C-N. By loading CQDs into the kaolin matrix, the surface area was improved and the removal of MB increased. For a lower MB concentration at 5 ppm, the removal efficiency could reach 96%. The composite exhibited good regeneration through the recyclability test.
Green Route Synthesis of Amorphous Silica from Oil Palm Decanter Cake: From Literature Review to Experiments Nursyahirah Abdul Rahim; Noorfidza Yub Harun; Anwar Ameen Hezam Saeed; Muhammad Roil Bilad
Indonesian Journal of Science and Technology Vol 8, No 2 (2023): (ONLINE FIRST) IJOST: September 2023
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v8i2.53724

Abstract

Numerous agricultural wastes are well-defined as low-cost sources and rich in silica content. The residue of oil palm wastes combustion seems a promising silica source and can be recovered through a straightforward method. In this study, the combustion followed by an alkaline extraction method was employed to extract high purity of silica. The oven-dried oil palm decanter cake (DOPDC) was heated at combustion temperatures of 600, 700, 800, and 900°C to produce OPDC ashes (OPDCA), followed by an alkaline extraction using 5M of NaOH solution. Thermogravimetric analysis (TGA) was used to observe the thermal behavior of DOPDC where the suitable combustion temperatures to produce silica ranged between 600 and 1000 ℃. X-Ray Fluorescence (XRF) analysis showed that silica contents were 31-36% after combustion, increasing to 76.95% after the chemical treatment. Moreover, the spherical shape of the silica was observed through electron microscope analysis. It was represented by the aggregation of silica after going through chemical treatment. The X-Ray Diffraction analysis also proved that the amorphous silica was produced, characterized by the hump-shaped spectrum. The infrared analysis confirmed that the silica had been successfully extracted from OPDCA by the presence of silica functional groups shown in the spectrum.
Co-Authors Anwar Ameen Hezam Saeed Khee Chung Hui Muhammad Roil Bilad Muhammad Wahyu Nugraha Nonni Soraya Sambudi Norashikin Ahmad Kamal Nursyahirah Abdul Rahim Suriati Sufian Yuvan Sithambaran