| 5 | 1/1 | 返回列表 |
| 查看: 745 | 回復: 4 | ||||
| 當前只顯示滿足指定條件的回帖,點擊這里查看本話題的所有回帖 | ||||
[求助]
求助實驗部分翻譯
|
||||
|
Ferrite magnetic nanoparticles Fe3O4 (2 g) and NiCl2·6H2O (10 wt% of nickel on ferrite) were stirred at room temperature in aqueous solution for 1 h. After impregnation, the suspension was adjusted to pH 12 by adding sodium hydroxide (0.5M) and stirred for 10 to 12 h. The solid was washed by distilled water (5 10 mL). The obtained metal precursors were reduced by adding an aqueous solution of 0.2MNaBH4 dropwise under gentle stirring in an ice– water bath for 30 min until no bubbles were observed in the solution. The resulting Fe3O4Ni MNPs were ultrasonicated for 10 min and then washed with distilled water and subsequently with ethanol. The synthesized Fe3O4Ni MNPs were characterized by several techniques such as XRD, ICP-AES, TEM, and FEG-SEM-EDS.調節(jié)PH值攪拌后,我用抽濾得到固體,然后再滴加硼氫化鈉一直有氣泡產生,為什么?冰水浴溫度是3攝氏度。 |
榮譽版主 (文壇精英)
山濤
![]() |
專家經驗: +925 |

榮譽版主 (文壇精英)
山濤
![]() |
專家經驗: +925 |
|
向NiCl2溶液(含有0.2g Ni2+)中加入2gFe3O4納米顆粒,室溫下攪拌1h。用0,5M NaOH調節(jié) 上述混合物pH至12,同時攪拌10-12h。5ml蒸餾水洗滌固體。然后將上述的固體置于冰水浴中逐滴加入0.2M NaBH4 溶液,緩慢攪拌,直到沒有氣泡產生。所得的Ni@Fe3O4納米顆粒超聲10min,先用蒸餾水洗滌,再用乙醇清洗。用XRD,ICP-AES,TEM,F(xiàn)E-SEM-EDS表征合成的Ni@Fe3O4納米顆粒。 產生氣泡的原因是Ni2+被NaBH4還原,有氣體產生。冰水浴的溫度理論上是0度,具體數(shù)值沒有必要過于關心,只是用于吸收氧化還原反應釋放的熱量,防止劇烈反應。 |

| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 一志愿北京化工大學材料與化工(085600)296求調劑 +12 | 稻妻小編 2026-03-26 | 12/600 |
|
|---|---|---|---|---|
|
[考研] 332求調劑 +6 | 蕉蕉123 2026-03-28 | 6/300 |
|
|
[考研] 315求調劑 +4 | akie... 2026-03-28 | 5/250 |
|
|
[考研] 求化學調劑 +4 | wulanna 2026-03-28 | 4/200 |
|
|
[考研] 調劑 +3 | 好好讀書。 2026-03-28 | 3/150 |
|
|
[考研] 085602 307分 求調劑 +7 | 不知道叫什么! 2026-03-26 | 7/350 |
|
|
[考研] 331環(huán)境科學與工程求調劑 +3 | 熠然好運氣 2026-03-27 | 3/150 |
|
|
[考研] 352分 化工與材料 +5 | 海納百川Ly 2026-03-27 | 5/250 |
|
|
[考博] 26申博 +3 | 加油沖。 2026-03-26 | 3/150 |
|
|
[考研] 286求調劑 +4 | lim0922 2026-03-26 | 4/200 |
|
|
[考研] 081200-11408-276學碩求調劑 +4 | 崔wj 2026-03-26 | 4/200 |
|
|
[考研] 325求調劑 +3 | Aoyijiang 2026-03-23 | 3/150 |
|
|
[考研] 085601求調劑總分293英一數(shù)二 +4 | 鋼鐵大炮 2026-03-24 | 4/200 |
|
|
[考研] 26考研-291分-廈門大學(085601)-柔性電子學院材料工程專業(yè)求調劑 +3 | min3 2026-03-24 | 4/200 |
|
|
[考研] 0854AI CV方向招收調劑 +4 | 章小魚567 2026-03-23 | 4/200 |
|
|
[考研] 0854電子信息求調劑 +7 | α____ 2026-03-22 | 9/450 |
|
|
[考研] 求調劑 +3 | 李李不服輸 2026-03-25 | 3/150 |
|
|
[考研] 一志愿吉林大學材料與化工303分求調劑 +4 | 為學666 2026-03-24 | 4/200 |
|
|
[考研]
|
13659058978 2026-03-24 | 4/200 |
|
|
[考研] 275求調劑 +6 | shansx 2026-03-22 | 8/400 |
|