| 5 | 1/1 | 返回列表 |
| 查看: 879 | 回復: 2 | |||
| 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 | |||
wandong8994新蟲 (小有名氣)
|
[求助]
共沉淀法制備納米四氧化三鐵 已有1人參與
|
||
| 怎么樣用共沉淀法制備分散良好的納米四氧化三鐵晶體,另外還想把納米四氧化三鐵負載在膨潤土上,應該怎么做才好? |
四氧化三鐵制備及包覆 |
捐助貴賓 (職業(yè)作家)

|
Synthesis of magnetic nanoparticles (Fe 3 O 4 -NP) : Citrate-stabilized Fe 3 O 4 -NP were synthesized following the Massart precipitation method, followed by nanoparticles surface functionalization with citric acid. [ 13 ] Briefl y, 0.86 g FeCl 2 and 2.35 g FeCl 3 were mixed in 40 mL water and heated to 80 °C under argon in a three-necked fl ask. While vigorously stirring the reaction mixture, 5 mL of NH 4 OH was introduced by a syringe and heating was continued for 30 min. Next, 1 g of citric acid in 2 mL water was introduced and the temperature raised to 95 °C while stirring was continued for an additional 90 min. Subsequently, the nanoparticle dispersion was dialyzed against water in a 12–14 kD cut-off cellulose membrane (Roth, Germany), resulting in a stable dispersion of negatively charged magnetite nanoparticles. Particle size and zeta-potential were determined via DLS and electrophoretic mobility measurements, respectively, using Malvern Nano ZS revealing a mean particle size of 30 nm and a zeta potential of –25 mV. AM上的,自己做的,分散性很好,放了一個月也僅有一丁點沉淀 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 一志愿天大材料與化工(085600)總分338 +5 | 蔡大美女 2026-03-13 | 5/250 |
|
|---|---|---|---|---|
|
[考研] 材料工程專碩調劑 +5 | 204818@lcx 2026-03-17 | 6/300 |
|
|
[考研] 化學工程321分求調劑 +15 | 大米飯! 2026-03-15 | 18/900 |
|
|
[考研] 08工科 320總分 求調劑 +5 | 梨花珞晚風 2026-03-17 | 5/250 |
|
|
[考研] 288求調劑,一志愿華南理工大學071005 +4 | ioodiiij 2026-03-17 | 4/200 |
|
|
[考研] 0703化學調劑 +4 | pupcoco 2026-03-17 | 7/350 |
|
|
[考研] 277調劑 +5 | 自由煎餅果子 2026-03-16 | 6/300 |
|
|
[考研] 326求調劑 +5 | 上岸的小葡 2026-03-15 | 6/300 |
|
|
[考研] 材料專碩326求調劑 +6 | 墨煜姒莘 2026-03-15 | 7/350 |
|
|
[考研] 本人考085602 化學工程 專碩 +16 | 不知道叫什么! 2026-03-15 | 18/900 |
|
|
[考研] 有沒有道鐵/土木的想調劑南林,給自己招師弟中~ +3 | TqlXswl 2026-03-16 | 7/350 |
|
|
[考博] 26申博 +4 | 八6八68 2026-03-16 | 4/200 |
|
|
[考研] 302求調劑 +4 | 小賈同學123 2026-03-15 | 8/400 |
|
|
[考研] 085601材料工程315分求調劑 +3 | yang_0104 2026-03-15 | 3/150 |
|
|
[考研] 288求調劑 +4 | 奇點0314 2026-03-14 | 4/200 |
|
|
[考研] 復試調劑 +3 | 呼呼?~+123456 2026-03-14 | 3/150 |
|
|
[考研] 329求調劑 +3 | miaodesi 2026-03-12 | 4/200 |
|
|
[碩博家園] 085600 260分求調劑 +3 | 天空還下雨么 2026-03-13 | 5/250 |
|
|
[考研] 一志愿山大07化學 332分 四六級已過 本科山東雙非 求調劑! +3 | 不想理你 2026-03-12 | 3/150 |
|
|
[考研] 0817化學工程與技術考研312分調劑 +3 | T123 tt 2026-03-12 | 3/150 |
|