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ISSN:    frecuency : 4   format : Electrónica

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Volume 16 Number 3 Year 2012

19 articles in this issue 

Wilaiporn Insuwan, Kunwadee Rangsriwatananon

Zeolite L is a crystalline aluminosilicate compound and a typical chemical composition of K9Al9Si27O72•nH2O (n = 0 - 36). The structure and chemical properties, as well as their sizes and morphologies of zeolite L has led to various applications in d... see more

Pags. 1 - 12  

Nantana Jiratumnukul, Patcharee Manowanna, Narangkhana Premmag

Modified bentonite clay was prepared by cationic exchange between the Na+ ions of montmorillonite in bentonite clay and two types of alkyl amines; hexadecylamine (primary amine) and hexadecyl trimethyl amine (tertiary amine). From the XRD analysis it was ... see more

Pags. 13 - 18  

Samroeng Krachodnok, Kenneth J. Haller, Ian D. Willaims

High product yield of highly crystalline layered MxV3O8 compounds was obtained under hydrothermal conditions from the V2O5-Zn(OAc)2.2H2O-alkali metal salt-H2O system at significantly lower reaction temperature than previously reported in neutral media for... see more

Pags. 19 - 28  

Sunaree Choknud, Oratai Saisa-ard, Kenneth J. Haller

Gabapentin, C9H17NO2, 2-[1-(aminomethyl)cyclohexyl]acetic acid, is used as an anticonvulsant drug to help control partial seizures in the treatment of epilepsy and to manage postherpetic neuralgia after ‘shingles’. Cocrystals of gabapentin with a series o... see more

Pags. 29 - 36  

Prasertsak Kasemanankul, Nirun Witit-Anun, Surasing Chaiyakun, Pichet Limsuwan

Rutile TiO2 films were deposited on unheated stainless steel type 316L using dual cathode DC unbalanced magnetron sputtering. The effects of deposition time ranging 30, 60, 90, and 120 mins on the films structure were investigated. Moreover, all the sampl... see more

Pags. 37 - 44  

Ratchaneepat Kumpangpet, Bunjerd Jongsomjit, Chanchana Thanachayanont, Seeroong Prichanont

A phenol enzyme biosensor was fabricated in this research using disposable screen-printed carbon electrode modified with gold nanoparticles (AuNPs), polypyrrole (PPy) and immobilized horseradish peroxidase (HRP) by electropolymerization method. The physic... see more

Pags. 45 - 52  

Wirach Taweepreda, Kritsada Phatcharasit

In this research, liquid natural rubber (LNR) was directly mixed with polyethylene (PE) and was compressed at 150oC. The PE was then separated and migrated to form a thin film on the rubber surface during the vulcanization process. The tensile properties ... see more

Pags. 53 - 58  

Phanuwat Krongarrom, Sirirat T Rattanachan, Thipwan Fangsuwannarak

Zinc Oxide (ZnO) nanostructure thin films doped with bismuth atoms were initially achieved by spin coating preparation from zinc acetate gel on the fused quartz substrate. The optical and structural properties have been preliminary studied in order to obt... see more

Pags. 59 - 70  

Thawatchai Chanthong, Watcharee Rattanasakulthong, Supree Pinitsoontorn, Aphichart Rodchanarowan

Sputtered Ni Films with various deposited times (30, 60, 90,120 and 150 min.) were prepared on glass substrate by RF-sputtering in Argon gas to study effects of sputtering time on their morphological, magnetic and thermal properties. Surface morphological... see more

Pags. 71 - 78  

Adisorn Buranawong, Nirun Witit-anun, Surasing Chaiyakun

Nano-crystalline Titanium dioxide (TiO2) has been well-known as a one of the most useful semiconductor material for application in self-cleaning coating which contains hydrophilic property. In this research, the films were deposited on un-heated silicon a... see more

Pags. 79 - 90  

Viruntachar Kruefu, Hathaithip Ninsonti, Natda Wetchakun, Burapat Inceesungvorn, Pusit Pookmanee, Sukon Phanichphant

Niobium-doped Zinc Oxide nanoparticles (Nb-doped ZnO NPs) in the range of 20 and 40 nm were synthesized by Flame Spray Pyrolysis (FSP) technique. The crystalline phase, morphology and size of the nanoparticles were characterized by X-ray diffraction (XRD)... see more

Pags. 91 - 100  

Chakkarphan Sangsuwan, Suvimol Sujjavanich

This paper reports the effect of local pozzolan on expansion of mortar bar due to local potential reactivity aggregates. The study, based on the accelerated test method, investigated capability of moderate calcium oxide fly ash to control the length chang... see more

Pags. 101 - 108  

Prachya Rojanotaikul, Sirachaya Kunjara Na Ayudhya, Sumet Charoenchaidet, Kajornsak Faungnawakij, Apinan Soottitantawat

Polyethylene (PE) is indispensable materials in daily lives. The catalyst is necessary to produce PE. Ziegler-Natta catalysts were mostly used to produce PE which consisted of MgCl2/TiCl4 system. Polyethylene particle was reported to replicate the shape o... see more

Pags. 109 - 114  

Siwaruk Chotiwan, Sutasinee Kityakarn, Yingyot Poo-arporn, Pinsuda Viravathana

In order to investigate the phases of used Co/SiO2 catalysts, one of the most commonly used catalysts for Fischer-Tropsch synthesis, time-resolved X-ray absorption near edge structure (TR-XANES) technique was introduced. The catalysts were prepared by inc... see more

Pags. 115 - 122  

Chaikarn Liewhiran, Nittaya Tamaekong, Anurat Wisitsora-at, Sukon Phanichphant

The noxious gas sensors were developed successfully using flame-spray-made SnO2 nanoparticles as the sensing materials. The functionalized nanoparticle properties were further analyzed by XRD, BET and TEM analyses. The SnO2 nanoparticles (SSABET: 141.6 m2... see more

Pags. 123 - 134  

Weerasak Chomkitichai, Nittaya Tamaekong, Chaikarn Liewhiran, Anurat Wisitsoraat, Saengrawee Sriwichai, Sukon Phanichphant

TiO2 is used extensively as a gas sensing material due to its change in electrical conductivity under analyst gas exposure. Gold (Au) is a good catalyst that promotes chemical reactions by reducing the activation energy between sensing film and particular... see more

Pags. 135 - 142  

Paruchai Pongwan, Burapat Inceesungvorn, Khatcharin Wetchakun, Sukon Phanichphant, Natda Wetchakun

Bare TiO2 and nominal 5.0 at% Fe-doped TiO2 nanoparticles were synthesized by the modified sol-gel method. The samples were physically characterized in order to obtain the correlation between structure and photocatalytic properties by X-ray diffraction (X... see more

Pags. 143 - 152  

Saranyoo Chaiwichian, Burapat Inceesungvorn, Kanlaya Pingmuang, Khatcharin Wetchakun, Sukon Phanichphant, Natda Wetchakun

Novel BiVO4/CeO2 nanocomposites were synthesized by the hydrothermal method combined with the homogeneous precipitation method. The mole ratios of BiVO4:CeO2 were 0.4:0.6, 0.5:0.5, and 0.6:0.4. The obtained BiVO4/CeO2 nanocomposites were characterized by ... see more

Pags. 153 - 160  

Oratai Saisa-ard, Kenneth J. Haller

Lead phosphate crystals were grown in agarose gel at room temperature. Nucleation and crystal growth rates were controlled by changing the density of the gel medium including pure and phosphate gel. Crystalline products in the pure gel layer show equant h... see more

Pags. 161 - 168