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Author: emiliahani

persamaan kimia..nk mintak tolong (dah ade gambar....tapi yang nano takleh save)

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 Author| Post time 19-8-2008 02:25 PM | Show all posts
takpe...banyak info ni...kene bace betui2 dulu..hehhehe per2 pon thanks bebanyak ek
Originally posted by mnm77 at 18-8-2008 07:11 PM


Lama dah tak revise chemical equation.....

Kalau tak salah....


Mg(OC2H5)2 = Mg(OCH2CH3)2 = Magnesium Dietoxide atau ringkas Mg(OEt)2

contoh alkoxide yg lain: Sodium Ethoxide NaOCH2 ...
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 Author| Post time 19-8-2008 02:29 PM | Show all posts
yer2 betui...sol gel...pakai teknik sol gel huhuhuhu.....ok ni kaedah nye...(tapi yang jisim die still jisim tuk tio2 sbb tukar tajuk bahan jek...)


1.Mg(OC2H5)2, potassium chloride (KCl), ethyl alcohol
2. 0.0596 g potassium chloride + 5 ml deionized water (1)
3. 0.085 ml Mg(OC2H5)2 + into 5 ml ethyl alcohol using magnetic stirrer (transparent solution)
4. 0.02 ml solution was added to the solution (2)-further stirred for 25 min.-(3)
7. observed the solution after a few minut and resulted in mgo beads.
8. then immediately coated onto substrate by spin coater at speed 200rpm. (coated two times)

rase2nye da betui sikit2 dah tu..thanks bebanyak gak ek...ade idea sikit nk wt camne
Originally posted by jebeng at 19-8-2008 07:47 AM
Susah gak bdak amik nano ni...huhu

Sori silap psl Mg(OC2H5)2 = ethanoat...huhu...

Preparation utk TiO2...

Ti{OCH(CH3)2}4 + 2 H2O → TiO2 + 4 (CH3)2CHOH

process ini dilakukan meng ...

[ Last edited by  emiliahani at 19-8-2008 02:31 PM ]
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 Author| Post time 20-8-2008 07:43 AM | Show all posts
tq...sume...rini bru nak try buat....ok...nnti i updatekan resultnyee
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 Author| Post time 22-8-2008 07:16 AM | Show all posts
dah prepare dah sampelnye..huhuu nk antar SEM lak
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Post time 22-8-2008 08:49 PM | Show all posts
oow...amik la pic ke.....paste kat sini pe hasilnyer...huhu
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Post time 23-8-2008 08:33 AM | Show all posts
ini semua tahyul
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 Author| Post time 25-8-2008 04:41 PM | Show all posts
huhu kene wat SEM dulu....nnti i update...jeng3...tak sabau nak nengok...
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 Author| Post time 25-8-2008 04:51 PM | Show all posts
:@ :@ :@ :@

[ Last edited by  emiliahani at 26-8-2008 09:04 AM ]
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 Author| Post time 5-9-2008 08:21 AM | Show all posts
apa patut buat ek...gambar SEM tak elok....yang partikel tuh cam bergumpal...
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 Author| Post time 5-9-2008 08:21 AM | Show all posts
lia nk tau saiz jek....klo bergumpal saiz takleh taula..plsssssssss....
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Post time 5-9-2008 10:54 AM | Show all posts
SEM tu aper?...huhu
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 Author| Post time 5-9-2008 05:26 PM | Show all posts
scanning electron microscope to study on its microstructures
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Post time 5-9-2008 05:45 PM | Show all posts
Originally posted by emiliahani at 5-9-2008 08:21 AM
apa patut buat ek...gambar SEM tak elok....yang partikel tuh cam bergumpal...


Tepek la kat sini gambar SEM tu... pi register kat photobucket, pstu upload gambar, copy link, paste kat tool bar yg ada gambar pokok tu (add image)

Masa SEM boleh zoom in/out, jadi zoom la supaya sesuai untuk lihat saiz dia.

XRD analysis tak buat ke?

[ Last edited by  mnm77 at 5-9-2008 05:48 PM ]
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 Author| Post time 6-9-2008 08:05 AM | Show all posts
ooo...ok2 nk kene scan dulu...xrd dah buat dah...tapi yang penting nk tau saiznye nano ke tak...klo tak nano hancuslaaaaaaaaaaaaaa die takleh tau saiz sbb bergumpal
bukan satu satu partikel....mebe cara preparation tuk characterize salah...org yang kat tnb tu suh pakai fibre paper...tula nak try dulu....tapi teknisen tu tadak smpi 11/9 ni...lamenyeeeeeeeeeeeeee
Originally posted by mnm77 at 5-9-2008 05:45 PM


Tepek la kat sini gambar SEM tu... pi register kat photobucket, pstu upload gambar, copy link, paste kat tool bar yg ada gambar pokok tu (add image)

Masa SEM boleh zoom in/out, jadi zoom l ...
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Post time 8-9-2008 12:39 PM | Show all posts
Originally posted by emiliahani at 15-8-2008 11:02 AM
ok gak ek..kebabom...kat umah ko:@ :@ :@   


lawak giler. tergelak besar aku harini.
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Post time 10-9-2008 09:42 PM | Show all posts
Originally posted by emiliahani at 18-8-2008 08:17 AM
sy nak kene fabricate nano-MgO sendirik...sebelum ni org buat TiO2....MgO lom tau ade org penah wt ke tak...ala...dala tak pandai kimia...member pon tatau.....



kalau nak MgO, campur 2 bahan yang diberi tuh..dan tiltrate dengan alkali, biasa orang pakai NaOH dan filter, dan panas suhu bawah 100oC sampai kering jadi macam paste, cara terbaik pakai vacuam drying sebab nak nano kan, drying rate kena study jugak.. lepas tuh bakar dalam oven pada suhu tertentu dengan udara, (calcination), itu ler MgO...size particle yang dimaksudkan nano tuh bergantung kepada cara penyediaan, drying method dan calcination temperature...guna TGA, XRD, BET dan SEM..tapi since nak nano, lebih baik crush tuh MgO tuh jadi size bawah 100 mesh..
process itu dinamakan  precipitation.. cari dalam topik  catalyst preparation...

good luck...

kalau salah, sapa2 tolong betulkan..

KTman (budak baru masuk sekolah)

[ Last edited by  KTMan at 10-9-2008 10:02 PM ]
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 Author| Post time 11-9-2008 08:57 AM | Show all posts
kalau filter can biase je leh tak...hari tu org kat SEM tuh da kasik filter paper...n fibre paper..klo cmtu leh tak...klo campor naoh tak efek ker..alahai..tak pandai ar
Originally posted by KTMan at 10-9-2008 09:42 PM



kalau nak MgO, campur 2 bahan yang diberi tuh..dan tiltrate dengan alkali, biasa orang pakai NaOH dan filter, dan panas suhu bawah 100oC sampai kering jadi macam paste, cara terbaik pakai v ...
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Post time 11-9-2008 12:58 PM | Show all posts
Originally posted by emiliahani at 11-9-2008 08:57 AM
kalau filter can biase je leh tak...hari tu org kat SEM tuh da kasik filter paper...n fibre paper..klo cmtu leh tak...klo campor naoh tak efek ker..alahai..tak pandai ar  


aikk.. kalau tak campur/titrate dengan NaOH, macamana nak dapat Mg(OH)2???  Mg(OH)2 yang akan precipatite become small particle, sementara Na-organics akan wujud dalam bentuk solution.. precipitate Mg(OH) tuh nanti filter dengan filter paper dan wash dengan distallate water hingga tiada lagi solution Na-organics.. bila dah basuh tiada ler effect Na..

good luck..

[ Last edited by  KTMan at 20-9-2008 12:17 PM ]
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Post time 11-9-2008 02:34 PM | Show all posts
Originally posted by mnm77 at 18-8-2008 07:11 PM


Lama dah tak revise chemical equation.....

Kalau tak salah....


Mg(OC2H5)2 = Mg(OCH2CH3)2 = Magnesium Dietoxide atau ringkas Mg(OEt)2

contoh alkoxide yg lain: Sodium Ethoxide NaOCH2 ...


Mg(OC2H5)2+ ethanol , tiada apa berlaku at room temperature, hanya diguna sebagai bahan pelarut..
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 Author| Post time 12-9-2008 08:13 AM | Show all posts
mgoh ngan mgo tu same ke..me yang yang mgo punye
Originally posted by KTMan at 11-9-2008 12:58 PM


aikk.. kalau tak campur/titrate dengan NaOH, macamana nak dapat Mg(OH)???  Mg(OH) yang akan precipatite become small particle, sementara Na-organics akan wujud dalam bentuk solution.. precipi ...
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