 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 5 | 1/1 | 返回列表 |
| 查看: 1355 | 回復(fù): 10 | ||
| 當(dāng)前只顯示滿足指定條件的回帖，點(diǎn)擊這里查看本話題的所有回帖 | ||
liuchuanao銅蟲(chóng) (小有名氣)
|
[求助]
核殼催化劑制備過(guò)程原理
|
|
|
求大神指導(dǎo)，小弟剛接觸此方面還不是很了解，最近看文獻(xiàn)，有如下一段：（�。ǎ�1）Preparation of Nickel Cores. A mixture of Ni(acac) 2 (0.77g, 3.0 mmol) and TOP (4.0 mL, 9.0 mmol) in oleylamine (20mL) was slowly heated from room temperature to 493 K for 15 min under an inert atmosphere and was allowed to stir at 493 K for 45 min. After the reaction, the resulting black mixture was cooled at room temperature, and the particles were precipitated by adding ethanol (40 mL) and centrifuging at 10000 rpm for 20 min. Finally, the nickel nanoparticles were dispersed in cyclohexane. 其中加粗部分加入乙醇是起什么作用呀？ （2）Synthesis of Ni(3 nm)@SiO2 Yolk-Shell Nanocatalysts. Cyclohexane (25 mL) was added into a mixture of igepal CO-630 (8.0 mL) and NH4OH aqueous solution (1.0 mL) and stirred for 10 min. The nickel particle dispersion in cyclohexane (25 mL, 60 mM with respect to the nickel precursor concentration) was added into the mixture and allowed to stir rapidly for 30 s. TMOS (1.0 mL) and C18TMS (1.0 mL) were added, and the mixture was stirred for 1 h at room temperature. The resulting Ni@SiO2 core -shell particles were precipitated by adding methanThe ethanol dispersion (30 mL) of the Ni@SiO2 core -shell particles (50 mM with respect to the nickel precursor concentration) was treated with hydrochloric acidol (10 mL), washed with ethanol thoroughly, and redispersed in ethanol. The ethanol dispersion (30 mL) of the Ni@SiO2 core -shell particles (50 mM with respect to the nickel precursor concentration) was treated with hydrochloric acid (10 mL, 0.45 M) at room temperature for 30 min. The product was collected by centrifugation at 10 000 rpm for 30 min and washed with ethanol thoroughly. After drying at room temperature, the powders were placed in the ceramic boat in a glass tube oven, heated at a ramping rate of 4 K/min to 773K, and calcined at 773 K for 2 h under a hydrogen flow of 200 cc/min. After calcination, the resulting powders were cooled to room tem-perature and immediately submerged into anhydrous ethanol (20 mL) under a hydrogen environment in order to prevent surface oxidation of the nickel cores. 其中加入鹽酸的的作用是什么呀？ 求大神幫忙呀，小弟萬(wàn)分感激�。�！ |
回復(fù)此樓» 猜你喜歡
26年材料/化學(xué)相關(guān)專業(yè)博士研究生招生 溫州大學(xué)化學(xué)與材料工程學(xué)院(26年秋季入學(xué))
已經(jīng)有0人回復(fù)
-
0703調(diào)劑
已經(jīng)有2人回復(fù)
-
物理化學(xué)論文潤(rùn)色/翻譯怎么收費(fèi)?
已經(jīng)有219人回復(fù)
-
085602化學(xué)工程求調(diào)劑。
已經(jīng)有4人回復(fù)
-
2026年博士研究生招生
已經(jīng)有1人回復(fù)
-
304求調(diào)劑
已經(jīng)有6人回復(fù)
-
國(guó)家工程物理交叉科學(xué)研究中心招收凝聚態(tài)物理及相關(guān)專業(yè)碩士研究生一名
已經(jīng)有10人回復(fù)
-
數(shù)二英語(yǔ)一的 理工科 求調(diào)劑
已經(jīng)有0人回復(fù)
-
大連工業(yè)大學(xué)招碩士研究生
已經(jīng)有0人回復(fù)
-
大連工業(yè)大學(xué)招碩士研究生
已經(jīng)有0人回復(fù)
-
數(shù)二 英語(yǔ)一，求調(diào)劑，本科學(xué)校福建農(nóng)林大學(xué)
已經(jīng)有1人回復(fù)
» 本主題相關(guān)價(jià)值貼推薦，對(duì)您同樣有幫助:
- 晶面暴露與催化劑的可還原性（H2-TPR）之間的聯(lián)系
已經(jīng)有30人回復(fù)
- 氧化鋁或氧化硅作為催化劑的原理
已經(jīng)有3人回復(fù)
- 怎么實(shí)驗(yàn)室小試中活性較高的催化劑研制成工業(yè)催化劑
已經(jīng)有15人回復(fù)
- 殼單元如何設(shè)置厚度的增加方向
已經(jīng)有8人回復(fù)
- 核殼催化劑的制備
已經(jīng)有6人回復(fù)
- 催化劑制備過(guò)程技術(shù)（清晰，帶書(shū)簽PDF）
已經(jīng)有861人回復(fù)
- 制備Cu ZrO2催化劑怎樣加速抽濾過(guò)程
已經(jīng)有7人回復(fù)
- 制備含鋇的熒光粉（Ba2SiO4:Eu）時(shí)，為什么鋇原料采用BaCO3，而不采用BaO
已經(jīng)有4人回復(fù)
- 【求助】關(guān)于催化劑制備過(guò)程中晶化，陳化，老化的含義和區(qū)別
已經(jīng)有7人回復(fù)
- 【求助】請(qǐng)教雙金屬催化劑比單金屬催化劑的優(yōu)越性有哪些
已經(jīng)有17人回復(fù)
- 【分享】固體催化劑的制備
已經(jīng)有54人回復(fù)
- 【求助】制備核殼型催化劑，殼層的厚度怎么計(jì)算呢？
已經(jīng)有8人回復(fù)
- 【求助】關(guān)于核殼結(jié)構(gòu)的制備
已經(jīng)有24人回復(fù)
- 浸漬法制備催化劑的原理與特點(diǎn)（補(bǔ)充zyhou的加壓浸漬法）
已經(jīng)有298人回復(fù)
3樓2013-09-08 18:37:59
liuchuanao
銅蟲(chóng) (小有名氣)
- 應(yīng)助: 0 (幼兒園)
- 金幣: 965.2
- 帖子: 209
- 在線: 187.3小時(shí)
- 蟲(chóng)號(hào): 1738778
- 注冊(cè): 2012-04-05
- 專業(yè): 應(yīng)用有機(jī)化學(xué)
2樓2013-09-06 08:09:38
leedoubles
銅蟲(chóng) (初入文壇)
- 應(yīng)助: 0 (幼兒園)
- 金幣: 161.5
- 帖子: 16
- 在線: 74.7小時(shí)
- 蟲(chóng)號(hào): 1334407
- 注冊(cè): 2011-06-30
- 專業(yè): 化學(xué)反應(yīng)工程
4樓2013-09-09 10:14:27
5樓2013-09-09 11:23:33
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[基金申請(qǐng)] 面上5B能上會(huì)嗎？ +4 | redcom 2026-03-29 | 4/200 |
|
|---|---|---|---|---|
|
|
[考研] 289求調(diào)劑 +5 | BrightLL 2026-03-29 | 5/250 |
|
|
[考研] 一志愿北京理工大學(xué)本科211材料工程294求調(diào)劑 +8 | mikasa的圍巾 2026-03-28 | 8/400 |
|
|
|
[考研] 本科雙非材料，跨考一志愿華電085801電氣，283求調(diào)劑，任何專業(yè)都可以 +6 | 芝士雪baoo 2026-03-28 | 8/400 |
|
|
|
[考研] 329求調(diào)劑 +7 | 星野? 2026-03-26 | 7/350 |
|
|
|
[考研] 一志愿211 初試270分 求調(diào)劑 +8 | 谷雨上岸 2026-03-23 | 9/450 |
|
|
|
[考研] 一志愿華理，數(shù)一英一285求A區(qū)調(diào)劑 +8 | AZMK 2026-03-25 | 12/600 |
|
|
|
[考研] 本科新能源科學(xué)與工程，一志愿華理能動(dòng)285求調(diào)劑 +3 | AZMK 2026-03-27 | 5/250 |
|
|
|
[考研] 346求調(diào)劑 一志愿070303有機(jī)化學(xué) +3 | 蘿卜燉青菜 2026-03-28 | 3/150 |
|
|
|
[考研] 317求調(diào)劑 +6 | 十閑wx 2026-03-24 | 6/300 |
|
|
|
[考研] 一志愿南京航空航天大學(xué)材料學(xué)碩求調(diào)劑 +3 | @taotao 2026-03-28 | 3/150 |
|
|
|
[考研] 085600材料與化工調(diào)劑 +10 | A-哆啦Z夢(mèng) 2026-03-23 | 16/800 |
|
|
|
[考研] 085601 材料工程 313分 求調(diào)劑 +5 | Ong3 2026-03-27 | 5/250 |
|
|
|
[考研] 333求調(diào)劑 +3 | question挽風(fēng) 2026-03-23 | 3/150 |
|
|
|
[考研]
 304材料求調(diào)劑
+4
|
鐘llll 2026-03-26 | 4/200 |
|
|
|
[考研] 289求調(diào)劑 +17 | 碩星赴 2026-03-23 | 17/850 |
|
|
|
[考研] 一志愿河工大 081700 276求調(diào)劑 +4 | 地球繞著太陽(yáng)轉(zhuǎn) 2026-03-23 | 4/200 |
|
|
|
[考研] 086003食品工程求調(diào)劑 +6 | 淼淼111 2026-03-24 | 6/300 |
|
|
|
[考研] 上海電力大學(xué)材料防護(hù)與新材料重點(diǎn)實(shí)驗(yàn)室招收調(diào)劑研究生（材料、化學(xué)、電化學(xué)，環(huán)境） +4 | 我愛(ài)學(xué)電池 2026-03-23 | 4/200 |
|
|
|
[考研] 292求調(diào)劑 +4 | 鵝鵝鵝額額額額?/a> 2026-03-24 | 4/200 |
|