Marjoni Imamora Ali Umar
National University of Malaysia
32 Papers
54 Citations
Marjoni Imamora Ali Umar is an academic researcher from National University of Malaysia. The author has contributed to research in topics: Dye-sensitized solar cell & Graphene. The author has an hindex of 8, co-authored 21 publications. Previous affiliations of Marjoni Imamora Ali Umar include Yahoo!.
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Papers
Two-Dimensional, Hierarchical Ag-Doped TiO2 Nanocatalysts: Effect of the Metal Oxidation State on the Photocatalytic Properties.
Siti Khatijah Md Saad,Akrajas Ali Umar,Marjoni Imamora Ali Umar,Masahiko Tomitori,Mohd Yusri Abd Rahman,Muhamad Mat Salleh,Munetaka Oyama +6 more
- 05 Mar 2018
TL;DR: Improvement of the crystallinity degree, decrease in the defect density and the photogenerated electron and hole recombination, and increase of the oxygen vacancy in the AgTNS are found to be the key factors for the enhancement of the photocatalytic properties.
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Revisiting Generic Science Skills as 21st Century Skills on Biology Learning
TL;DR: In this article, the authors describe the generic skills of students who conducted experiments on biology learning grade VIII junior high school (SMP) in Batusangkar using a descriptive quantitative design.
Advances in porous and high-energy (001)-faceted anatase TiO 2 nanostructures
Akrajas Ali Umar,Siti Khatijah Md Saad,Marjoni Imamora Ali Umar,Mohd Yusri Abd Rahman,Munetaka Oyama +4 more
TL;DR: In this article, the authors present a review of the anatase polymorph of TiO2 nanostructures containing high-energy facet, particularly (001) plane, with porous structure, covering their synthesis and their application in photocatalysis.
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Characterization of multilayer graphene prepared from short-time processed graphite oxide flake
Marjoni Imamora Ali Umar,Chi Chin Yap,Rozidawati Awang,Mohammad Hafizuddin Hj Jumali,Muhamad Mat Salleh,Muhammad Yahaya +5 more
TL;DR: In this article, the graphite oxide flake was first synthesized by using modified Hummers method with a relatively small amount of oxidizing agent and short-time processing at ambient temperature.
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Formation of gold-coated multilayer graphene via thermal reduction
Marjoni Imamora Ali Umar,Chi Chin Yap,Rozidawati Awang,Akrajas Ali Umar,Muhamad Mat Salleh,Muhammad Yahaya +5 more
TL;DR: In this article, the structural, optical, and electrical properties of gold-coated multilayer graphene were studied by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), UV-vis spectroscopy, and four point probe measurement.
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