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硒化鎘量子點合成遇到的問題
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各位大蝦,小弟做量子點合成遇到了些問題.... 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. 然后把陽極放在前驅(qū)物溶液中,加熱到50℃來回循環(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攝氏度兩個小時,但是還有好多硒粉沒有溶解呢...,又加了21ml水和9ml甲醇,溶解了一會兒,還是不行、、、、、請問難道是加的順序的問題么 還有一個問題,在前驅(qū)物中泡著,然后加熱到50攝氏度,文獻讓泡20MIN,這讓溶劑揮發(fā)好多啊。 請做過的大蝦指導。 另一個問題,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當做核。 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,是因為怕電子和電解液復合了么,謝謝! |
材料合成與表征 |
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