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[交流] 硒化鎘量子點(diǎn)合成遇到的問(wèn)題

各位大蝦，小弟做量子點(diǎn)合成遇到了些問(wèn)題....
sensitizer could be increased by repeating the assembly cycle.
For CdSe sensitizer, the anion source was sodium selenosulfate
(Na2SeSO3) solution, which was prepared by refluxing 0.3 M Se
and 0.6 M Na2SO3 in an ethanol/Milli-Q ultrapure water (3:7)
solution at 70 C for 2 h.

然后把陽(yáng)極放在前驅(qū)物溶液中，加熱到50℃來(lái)回循環(huán)。

我是先把2.3688g的硒粉和15.0403g的硫代硫酸鈉放入250ML的三口燒瓶中，先加35ML水，然后加入15ml的甲醇，70攝氏度兩個(gè)小時(shí)，但是還有好多硒粉沒(méi)有溶解呢...，又加了21ml水和9ml甲醇，溶解了一會(huì)兒，還是不行、、、、、請(qǐng)問(wèn)難道是加的順序的問(wèn)題么

還有一個(gè)問(wèn)題，在前驅(qū)物中泡著，然后加熱到50攝氏度，文獻(xiàn)讓泡20MIN，這讓溶劑揮發(fā)好多啊。
請(qǐng)做過(guò)的大蝦指導(dǎo)��！
另一個(gè)問(wèn)題，是硫化鎘摻錳之后禁帶寬度能有多大，如果做成硒化鎘硫化鎘的核殼結(jié)構(gòu)，是否還是把硫化鎘摻錳的量子點(diǎn)當(dāng)做核。

另The photoactive semiconductor electrodes were prepared by
successive ionic layer adsorption and reaction (SILAR)
method.29−31 In brief, 0.1 M cadmium nitrate in methanol
was used as cation source and 0.1 M sodium sulfide in 1:1
methanol and water as anion source. To incorporate doping of
Mn2+, manganese acetate (0.075 M) was mixed with cadmium
nitrate. This allowed coadsorption of Mn2+ and Cd2+ ions,
which in turn facilitated incorporation of Mn2+ in the CdS film.
Each cycle of SILAR consists of successive immersion of the
FTO glass electrode, precoated with transparent active TiO2
layer and a scattering layer,14,32 in metal ion and sulfide (or
selenide) anion solutions for 1 min. The cadmium and selenide
ion precursor solution for CdSe was prepared by mixing 0.03 M
cadmium nitrate and 0.03 M selenium oxide, respectively, with
0.06 M sodium borohydride, in degassed ethanol inside a glove
box under N2 atmosphere. All the working electrodes were
finally coated with 2 cycles of ZnS. The counter electrode was
prepared by doctor blading Cu2S and reduced graphene oxide
(RGO) composite on FTO glass.

為什么工作電極上還要循環(huán)兩次硫化鋅，是因?yàn)榕码娮雍碗娊庖簭?fù)合了么，謝謝！

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1樓 2012-05-12 21:35:02

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tt.yao

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天堂初秋: 回帖置頂 2012-05-12 22:09:32

http://baike.baidu.com/view/418453.htm百度百科。
是硫代硫酸鈉還原性強(qiáng)，還是亞硫酸鈉。看文獻(xiàn)要看清楚啊。

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5樓2012-05-12 21:54:20

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天堂初秋: 金幣+1 2012-05-12 21:51:16

1, 是硫代硫酸鈉還是亞硫酸鈉？
2，氮?dú)�，回流�?br /> 3，你要去查文獻(xiàn)，有人做過(guò)看他怎么說(shuō)。沒(méi)人做過(guò)，要看理論。沒(méi)人做過(guò)理論，要做了實(shí)驗(yàn)才知道。
4，coating增加穩(wěn)定性

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2樓2012-05-12 21:43:53

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引用回帖:

2樓: Originally posted by tt.yao at 2012-05-12 21:43:53:
1, 是硫代硫酸鈉還是亞硫酸鈉？
2，氮?dú)�，回流�?br /> 3，你要去查文獻(xiàn)，有人做過(guò)看他怎么說(shuō)。沒(méi)人做過(guò)，要看理論。沒(méi)人做過(guò)理論，要做了實(shí)驗(yàn)才知道。
4，coating增加穩(wěn)定性

硫代硫酸鈉，我沒(méi)有通氮?dú)饣亓�。有文獻(xiàn)，人家合成出來(lái)過(guò)。你的第四點(diǎn)是針對(duì)硫化鋅的么....

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3樓2012-05-12 21:52:25

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0.6 M Na2SO3這個(gè)是硫代硫酸鈉么

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4樓2012-05-12 21:53:21

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