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RISS 인기검색어
- 검색키워드
- 저자 : Zaiton Abdul Majid (검색결과 5 건)
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Danial Wan Hazman,Abdul Majid Zaiton 한국탄소학회 2022 Carbon Letters Vol.32 No.6
Graphene nanoplatelets (GNPs) have garnered significant attention in the field of thermal management materials due to their unique morphology and remarkable thermal conductive properties. Their impressive thermal properties make them an interesting choice of nanofillers with which to produce multifunctional composite materials and a host of other applications whilst their structural and thermal properties significantly improve their target materials or composites. Therefore, this present study reviewed recent advances in the use of GNPs as nanofillers to enhance the thermal conductivity of various materials or composites. The improved thermal conductivity that GNPs impart in composites is also comprehensively compared and discussed. Therefore, this review may reveal hitherto unknown opportunities and pave the way for the production of materials with enhanced thermal applications including electronics, aerospace devices, batteries, and structural reinforcement.
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Danial Wan Hazman,Mohamed Nurul Ain Syazalin,Majid Zaiton Abdul 한국탄소학회 2022 Carbon Letters Vol.32 No.1
The mercury ion (Hg2+) is regarded as one of the toxic cations that is extremely harmful and dangerous to human health and the environment. With this growing awareness, it is imperative that facile and rapid sensing systems developed for the detection of Hg2+. Due to excellent sensitivity and selectivity, graphene quantum dots (GQDs), a zero-dimensional carbon nanomaterial, are attracting the attention of researchers as promising candidates as fluorescent probes for Hg2+ detection. This study aimed at conducting an in-depth review of recent advances into GQD-based materials as fluorescent probes in Hg2+ sensing. This systematic review was carried out by covering three main databases, namely, Scopus and Science Direct as the dominant databases, followed by Google Scholar as the supporting database. GQD-based materials encompassing bare GQDs, N-GQDs, B, N-GQDs, N, S-GQDs, N, K-GQDs, RhB-GQDs, Cys-GQDs, PEHA-GQD-DPA, Gly-GQDs, Mn(II)-N-GQDs, NH2–Ru@ SiO2-NGQDs and FA-GQDs were discussed thoroughly with regard to their synthesis strategies, along with their potential application in the detection of Hg2+. The doping of heteroatoms is envisaged to enhance the quantum yield and selectivity of bare GQDs. This review might unlock a wide range of opportunities for the application of various GQD-based materials as an adaptable, feasible and scalable approach to the detection of Hg2+.
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Nurasmat Mohd Shukri,Wan Azelee Wan Abu Bakar,Jafariah Jaafar,Zaiton Abdul Majid 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.28 No.-
Catalytic deacidification is a fascinating method to decrease the naphthenic acids (NAs) concentration ofhighly acidic petroleum crude because these acids caused serious corrosion in refinery equipment. Korean crude oil with a total acid number (TAN) of 8.32 mg KOH/g was used to test the performance ofcatalytic deacidification technology. A basic chemical with a dosing of 4% ammonia solution inpolyethylene glycol (NH3–PEG) was used as the acid removal agent with concentrations of 100, 500, and1000 mg/L. Cerium oxide, zinc oxide and tin oxide based catalysts supported onto alumina prepared withdifferent calcination temperatures and types of dopants were used to aid in the deacidification reaction. The potential catalyst was characterized by BET, EPR and CO2-TPD for its physicochemical properties. The results showed 93.3% reduction for Korean crude oil using Cu/Ce (10:90)/Al2O3 calcined at 1000 8C. This catalyst has the highest BET surface area of 87.12 m2/g with higher dispersion of Cu2+ species on theCeO surface detected using EPR spectra and higher total basic site measured using CO2-TPD. Theseproperties contributed to the excellent catalytic performance which remove the NAs in the Korean crudeoil and concurrently reduced the TAN value below than one.
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A short review on electrochemical exfoliation of graphene and graphene quantum dots
Wan Hazman Danial,Noriliya Aina Norhisham,Ahmad Fakhrurrazi Ahmad Noorden,Zaiton Abdul Majid,Kazunari Matsumura,Anwar Iqbal 한국탄소학회 2021 Carbon Letters Vol.31 No.3
The synthesis of graphene and graphene quantum dots (GQDs) employing various approaches with a range of precursors, chemicals, and parameters has been reported. Most of the top-down and bottom-up techniques employ strong and hazardous chemical environments, complicated and tedious procedures, are time-consuming, and often require special equipment. Another drawback of the techniques reported is the production of agglomerated, inhomogeneous, and non-dispersible graphene in aqueous solvents or organic solvents, thus limiting its application. This work specifically and comprehensively describes the electrochemical exfoliation of graphene and GQDs, which is often considered as a simple one-step, facile, non-hazardous, and highly efficient technique yet favourable for mass production. A brief discussion on the advantageous and challenges of the electrochemical technique and applications of the electrochemically exfoliated graphene and GQDs is also presented.
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Mohammad Ali Asaad,Noor Nabilah Sarbini,Arizu Sulaiman,Mohammad Ismail,Ghasan Fahim Huseien,Zaiton Abdul Majid,Pandian Bothi Raja 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.63 No.-
Influence of novel green Elaeis guineensis (EG) and silver nanoparticles (AgNPs) on the improved corrosion resistance of mild steel against acute acid attack is reported. Such EG/AgNPs were synthesized from palm oil leaf extracts and used as inhibitor with varying contents to inspect the feasibility of modifying the acid (1 M HCl(aq)) mediated anti-corrosion behaviour of mild steel. The structural and morphological properties of the extracted EG/AgNPs inhibitor (in powder form) were determined using TEM, XRD, and EDX analyses. Furthermore, the acid solution exposed mild steel specimens were characterized via FESEM, EDX, AFM, XRD, weight loss, polarization and electrochemical impedance measurements. Mild steel surface was found to adsorb the EG/AgNPs and formed a protective film advantageous for inhibiting the acid attack. Steel specimen incorporated with 10% (v/v) of EG/AgNPs inhibitor revealed maximum inhibition efficiency of 94.1%.
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