| 查看: 1343 | 回复: 10 | ||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | ||
[求助]
核壳催化剂制备过程原理
|
||
|
求大神指导，小弟刚接触此方面还不是很了解，最近看文献，有如下一段：（！）（（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. 其中加入盐酸的的作用是什么呀？ 求大神帮忙呀，小弟万分感激！！！ |
回复此楼» 猜你喜欢
求助电催化剂制备，怎么在碳布表面生长PdCo合金
已经有1人回复
-
304求调剂
已经有5人回复
-
物理化学论文润色/翻译怎么收费?
已经有142人回复
-
上海华东理工大学机械与动力工程学院先进材料与制造研究组招聘公告
已经有0人回复
-
304求调剂
已经有6人回复
-
ANSYS 静态结构 多线性随动硬化 应变值怎么计算
已经有1人回复
-
304求调剂
已经有1人回复
-
双一流湘潭大学化工学院招收化工、能源动力、工程热物理相关研究生调剂
已经有12人回复
-
中药学306，求调剂
已经有0人回复
-
河南一本高校化学，材料，化工专业招收研究生
已经有0人回复
-
大连海事大学船舶洁净能源研究中心2026年博士研究生招生启事
已经有3人回复
» 本主题相关价值贴推荐，对您同样有帮助:
- 晶面暴露与催化剂的可还原性（H2-TPR）之间的联系
已经有30人回复
- 氧化铝或氧化硅作为催化剂的原理
已经有3人回复
- 怎么实验室小试中活性较高的催化剂研制成工业催化剂
已经有15人回复
- 壳单元如何设置厚度的增加方向
已经有8人回复
- 核壳催化剂的制备
已经有6人回复
- 催化剂制备过程技术（清晰，带书签PDF）
已经有861人回复
- 制备Cu ZrO2催化剂怎样加速抽滤过程
已经有7人回复
- 制备含钡的荧光粉（Ba2SiO4:Eu）时，为什么钡原料采用BaCO3，而不采用BaO
已经有4人回复
- 【求助】关于催化剂制备过程中晶化，陈化，老化的含义和区别
已经有7人回复
- 【求助】请教双金属催化剂比单金属催化剂的优越性有哪些
已经有17人回复
- 【分享】固体催化剂的制备
已经有54人回复
- 【求助】制备核壳型催化剂，壳层的厚度怎么计算呢？
已经有8人回复
- 【求助】关于核壳结构的制备
已经有24人回复
- 浸渍法制备催化剂的原理与特点（补充zyhou的加压浸渍法）
已经有298人回复
3楼2013-09-08 18:37:59
2楼2013-09-06 08:09:38
4楼2013-09-09 10:14:27
5楼2013-09-09 11:23:33
