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3 results on '"Muhammad Aidil Ibrahim"'

1. INVESTIGATION OF THE ANTIOXIDANT ACTIVITY AND TOTAL PHENOLIC CONTENT OF DIFFERENT Carica papaya PLANT PARTS (SHOOTS, LEAVES, AND SEEDS) EXTRACTED USING DIFFERENT EXTRACTION SOLVENTS

Author

Noor Syazreen Mohd Rozy and Muhammad Aidil Ibrahim

Subjects
carica papaya, extraction, antioxidant activity, total phenolic content, Science, Social Sciences
Abstract

Carica papaya is an important fruit crop in the tropics and is cultivated for consumption in fresh or processed form and for use in the pharmaceutical, leather, and textile industries. Unlike the papaya fruits that are useful for the food industry, the shoots, leaves, and seeds were often discarded as they are considered waste products without realizing their nutrition potential. This study was conducted to determine the Carica papaya plant part that yields the highest phenolic compound by the FolinCiocalteu method and to find out which Carica papaya plant part exhibits the highest antioxidant activity through DPPH free radical scavenging assay. The investigation of antioxidant activity and the total phenolic content of the unused papaya tree parts is significant as the unused parts of the Carica papaya tree like shoots, leaves, and seeds can become potential raw materials for the manufacturing of medicine and drugs. The extraction procedure involved two extraction solvents with different ratios which were methanol, ethanol, and a mixture of methanol and ethanol at 1:1, 1:2, and 2:1 ratio respectively. The methanol-extracted shoots of Carica papaya yielded the highest phenolic compound with 11.70±0.62 mg GAE/g. While methanol-extracted leaves of Carica papaya exhibited the highest antioxidant activity through DPPH free radical scavenging assay with 86.78±0.49%. The present study shows that methanol should be used as the extraction solvent as it is the most efficient solvent in extracting phenolic compounds from the Carica papaya plant's part. Extraction using methanol as the solvent could be used for further studies as it can yield maximum phytochemical compounds from the Carica papaya plant as well as other plant samples.

Published
2023

2. FTIR Spectrum Investigation of Thionine-Graphene Nanocomposite

Author

Oskar Hasdinor Hassan, Muhammad Aidil Ibrahim, Ab Malik Marwan Ali, Fathiah Abdullah, Tunku Ishak Tunku Kudin, Muhd Zu Azhan Yahya, and Nur Atikah Md Jani

Subjects
Materials science, Nanocomposite, Graphene, Oxide, Infrared spectroscopy, Nanotechnology, 02 engineering and technology, General Medicine, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Thionine, 0104 chemical sciences, law.invention, chemistry.chemical_compound, chemistry, Chemical bond, law, Fourier transform infrared spectroscopy, 0210 nano-technology, Graphene oxide paper
Abstract

Graphene is a material that has been heavily investigated in many researches due to its beneficial characteristics such as large surface area, low manufacturing cost, high electro conductivity and incredible mechanical strength. Applying the graphene in water-based solvents however can cause agglomeration due to its hydrophobic properties. Researchers have composited the graphene with other materials in overcoming its hydrophobicity. In this research, graphene was nanocomposited with thionine to make it disperse well in water-based solvents while preserving its intrinsic properties. The nanocomposition process involves mixing of both graphene oxide with thionine and were reduced by hydrazine hydrate while reflux heating. The produced mixture was then filtered to obtain the Thionine-Graphene nanocomposite. The obtained sample was then characterized to confirm the composition of both graphene and thionine. Fourier transfer infrared spectroscopy was operated to investigate the chemical bonds and hence concluding the presence of both graphene and thionine in the sample. The preservation of the intrinsic properties of graphene was also investigated through observing the absence of functionalized graphene bonds. Post-investigation reports that the chemical bonds from both of the materials, graphene and thionine were detected confirming the successfulness of the nanocomposition.

Published
2017

3. Morphological and Electrochemical Properties of Hybridized PPy/rGO Composites

Author

Ab Malik Marwan Ali, Muhammad Aidil Ibrahim, Oskar Hasdinor Hassan, Nur Atikah Md Jani, Hazwanee Osman, and Tunku Ishak Tunku Kudin

Subjects
Materials science, Scanning electron microscope, Graphene, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, Polypyrrole, 01 natural sciences, 0104 chemical sciences, law.invention, chemistry.chemical_compound, symbols.namesake, chemistry, law, symbols, Graphite, Fourier transform infrared spectroscopy, Composite material, Cyclic voltammetry, 0210 nano-technology, Raman spectroscopy
Abstract

Polypyrrole (PPy) was synthesized via microemulsion method from pyrrole (Py) monomer, while reduced graphene oxide (rGO) was produced from graphite powder. PPy/rGO composites harvested by ultrasonication with various weight ratio of PPy:rGO to 4:1, 3:1, 2:1 and 1:1, respectively. The composites successfully characterized via scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The characterizations revealed the composites morphology was well developed. The rGO was successfully embedded with PPy forming an excellent network structure. The electrochemical of the PPy/rGO composite was determined via electrical conductivity and cyclic voltammetry. The highest electrical conductivity obtained by PPy/rGO composites with ratio 1:1 of 2.504 Ω-1cm-1 with excellent reversible redox reaction.

Published
2017

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