| 查看: 1595 | 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
关于合成MIL-125的求助
已经有0人回复
-
双非本硕光催化方向想读博，请各位老师看看我！
已经有2人回复
-
物理化学论文润色/翻译怎么收费?
已经有120人回复
-
瑞典林雪平大学范立洲课题组现招聘博士后、岗位制博士生
已经有0人回复
-
中国科大仿生界面材料科学全国重点实验室戴懿涛研究员/江雷院士团队招聘科研助理
已经有0人回复
-
中国科大仿生界面材料科学全国重点实验室戴懿涛研究员/江雷院士团队招聘科研助理
已经有0人回复
-
寻求物理化学学报最新的投稿模板！
已经有4人回复
-
东南大学杰青/海优团队招聘催化方向博士后
已经有866人回复
-
投稿咨询
已经有7人回复
-
自科面上 散金币 祈福
已经有61人回复
-
铁钼催化剂成型
已经有2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
5楼2013-09-09 11:23:33
2楼2013-09-06 08:09:38
3楼2013-09-08 18:37:59
4楼2013-09-09 10:14:27
