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Mohd Hizami Mohd Yusoff,Ahmad Zuhairi Abdullah 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.2
Sulfated zirconia supported on SBA-15 (SZSBA-15) catalysts with different zirconia loadings (5-20 wt%) were synthesized using urea hydrolysis method. Effects on the physicochemical properties of the catalysts and activity in selective glycerol esterification with palmitic acid were particularly investigated. Various characterization techniques such as N2 adsorption-desorption analysis, SEM, TEM, TGA, FTIR, NH3-TPD and acidity measurement by titration were used. Increasing zirconia loading decreased the surface area, pore size and pore volume of the catalysts, but increased the sulfate content and improved the catalyst acidity. Larger surface area was not the major factor in determining the catalyst activity especially in the reaction involving bulky molecules. The reaction was found to be influenced by the amount of active sites presence on the catalyst and also by the dimension of the pores which slightly promoted the shape selective reaction. Among all catalyst, 15SZSBA-15 demonstrated the highest activity with 88% conversion and 44% monopalmitin yield.
Mohd Azlin Mohd Nor,Salit Mohd Sapuan,Mohd Zuhri Mohamed Yusoff,Edi Syams Zainudin 한국섬유공학회 2022 Fibers and polymers Vol.23 No.10
Composite mats based on submicron biopolyester fibers, such as poly(3-hydroxyalkanoate)s, and zinc oxide(ZnO) nanoparticles have been exploited in medicine and environmental areas, as antibacterial wound dressings or filters. Generally, the resulting mat
국제동향 - Current Issues And Status Of The Pallet Industry In Malaysia
Yusoff, Mohamed Nor Mohd 한국파렛트컨테이너협회 2013 파렛트 뉴스 Vol.71 No.-
본 원고는 지난 2013년 7월 18일 일본 'Tokoy Metropolitan Industrial Trade Center'에서 열린 Asia Seamless Logistics Forum 발표 원고로 말레이시아 Mohamed Nor Mohd Yusoff APSF 부회장이 발표하였습니다.
Mohd Yusoff, Abd.R.b.,Kim, H.P.,Jang, J. Elsevier Science 2013 Organic electronics Vol.14 No.3
We report the hybrid inorganic-organic photovoltaics incorporating vanadium pentoxide (V<SUB>2</SUB>O<SUB>5</SUB>) as hole and zinc oxide (ZnO) nanoparticles (NPs) as electron extraction layers. This device demonstrates high open circuit voltage of about 0.89V with considerably high short-circuit current density of 10.13mA/cm<SUP>2</SUP> along with fill factor of about 61.03%. Combining all these parameters, the power conversion efficiency is 5.53% which is higher compared to that (3.6%) of the cell without ZnO NPs.
Yusoff, Abd. Rashid bin Mohd,Kim, Dongcheon,Kim, Hyeong Pil,Shneider, Fabio Kurt,da Silva, Wilson Jose,Jang, Jin The Royal Society of Chemistry 2015 Energy & environmental science Vol.8 No.1
<P>High efficiency, solution-deposited polymer inverted double- and triple-junction solar cells are demonstrated. The devices are composed of three distinctive photosensitive materials in three distinct subcells, with minimal absorption spectral overlap, and with a bandgap ranging from 1.3 eV to 1.82 eV. A transparent hybrid inorganic organic mixture was introduced as an interconnecting layer to optically and physically connect the subcells. Accordingly, a power conversion efficiency of 10.39% was attained for the double-junction cell and a record high of 11.83% was obtained for the triple-junction cell.</P> <P>Graphic Abstract</P><P>We propose that 1 + 1 + 1 triple-junction solar cells can provide an increased efficiency, as well as a higher open circuit voltage, compared to tandem solar cells. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4ee03048f'> </P>
Null current hysteresis for acetylacetonate electron extraction layer in perovskite solar cells
Mohd Yusoff, Abd. Rashid bin,Mat Teridi, Mohd Asri,Jang, Jin The Royal Society of Chemistry 2016 Nanoscale Vol.8 No.12
<P>Solution processed zirconium acetylacetonate (Zr(acac)) is successfully employed as an electron extraction layer, replacing conventional titanium oxide, in planar CH3NH3PbI3 perovskite solar cells. The as-prepared Zr(acac) film possesses high transparency, high conductivity, a smooth morphology, high wettability, compatibility with PbI2 DMF solution, and an energy level matching that of CH3NH3PbI3 perovskite material. An average power conversion efficiency of about 11.93%, along with a high fill factor of 74.36%, an open circuit voltage of 1.03 V, and a short-circuit current density of 15.58 mA cm(-2) is achieved. The overall performance of the devices is slight better than that of cells using ruthenium acetylacetonate (Ru(acac)). The differences between solar cells with different electron extraction layers in charge recombination, charge transport and transfer and lifetime are further explored and it is demonstrate that Zr(acac) is a more effective and promising electron extraction layer. This work provides a simple, and cost effective route for the preparation of an effective hole extraction layer.</P>
Mohd Yusoff, Abd. Rashid bin,Kim, Dongcheon,Schneider, Fabio Kurt,da Silva, Wilson Jose,Jang, Jin The Royal Society of Chemistry 2015 ENERGY AND ENVIRONMENTAL SCIENCE Vol.8 No.5
<P>Polymer solar cells (PSCs) are apparently becoming one of the leading technologies to reduce our dependency on traditional power sources. However, the frequent use of a transparent conductive electrode, indium-tin-oxide (ITO), in the present PSC technologies has increased the overall expenses. In addition, its brittleness in nature could limit the future development of PSCs, particularly in a flexible format. Here, we report on the development of Au-doped single layer graphene nanoribbons (Au-doped SLGNRs) as an option to the transparent conducting electrode (indium tin oxide, ITO) that could yield a single-layer PSC with power conversion and external quantum efficiencies comparable to commonly used transparent electrodes. When the Au-doped SLGNRs are implemented in tandem architecture, a power conversion efficiency (PCE) of 8.48% is achieved. This is the highest efficiency for ITO-free tandem PSCs to date. The improved performance of the Au-doped SLGNR anode is characterized to the structure of the device that enables a hole transport from the active layer into the Au-doped SLGNR anode.</P>
Yusoff, Abd Rashid bin Mohd,Jose da Silva, Wilson,Kim, Hyeong Pil,Jang, Jin RSC Pub 2013 Nanoscale Vol.5 No.22
<P>One approach to harvest a wide solar spectral solar energy is to stack two solar cells with different absorption characteristics in a tandem cell architecture. Herein, solution processed tandem solar cells, with highly transparent titanium oxide (TiO2) and graphene oxide (GO) as an efficient recombination layer, were designed, fabricated and characterized. We have adopted poly[(4,4'-bis(3-ethylhexyl)dithieno[3,2-b:''3'-d]silole)-2,6-diyl-alt-(2,5-(3-(2-ethylhexyl)thiophen-2-yl)thiazolo[5,4-d]thiazole]:indene-C60 bisadduct (PSEHTT:ICBA) and poly[(4,4'-bis(2-ethylhexyl)dithieno[3,2-b:2',3'-d]silole)-2,6-diyl-alt-(2,1,3-benzothiadiazole)-4,7-diyl]:[6,6]-phenyl-C70 butyric acid methyl ester (PSBTBT:PC70BM) as the active layers for the front and rear cells, respectively. The TiO2/GO serves as an electron and hole collecting and recombination layer. The tandem solar cells showed a high open circuit voltage (VOC) 1.62 V, a moderate short circuit current density (JSC) 8.23 mA cm(-2), fill factor (FF) 62.98%, leading to the power conversion efficiency of 8.40%. The obtained VOC value of tandem solar cells is ideal for the summation of VOCs attained from front and rear cells and it is evident that our tandem solar cells are well connected in series. Moreover, this tandem cell exhibits a 20% drop in conversion efficiency under continuous AM illumination for 2880 h.</P>