| 查看: 1783 | 回复: 5 | ||
| 本帖产生 1 个 翻译EPI ，点击这里进行查看 | ||
[求助]
急！有关沸石合成的一段文献，急求翻译！！！
|
||
|
Al–Si-beta and Ti–Si-beta were synthesized by the aging–drying method in fluoride medium without seeding and using tetraethylammonium hydroxide as organic structure-directing agent (OSDA). In the aging–drying method the gels are allowed to release some volatile species (mainly ethanol and water).Samples were aged and dried during about one week. Organic solvents were added to selected aged–dried gels to determine their role as complementary OSDA. All samples were hydrothermally treated at 140 ℃ during 1–12 days. After crystallization, samples were characterized by PXRD, SEM, TGADTG, FTIR, atomic absorption, low temperature nitrogen adsorption, 29Si MAS NMR and 27Al MAS NMR. Pure and well-crystallized zeolite beta samples were obtained in all experiments performed. Polymorph A enrichments of about 69% and 64% were reached for Ti and Al loaded samples, respectively. Al-loaded samples exhibited small average crystal sizes compared with Ti-loaded samples. The incorporation of Al in the beta framework was proven by several techniques and the Al/Si ratios were similar to those of the precursor gels. However, Ti incorporation was quite low. |
回复此楼» 猜你喜欢
建议基金发布提前给出明确的时间点
已经有14人回复
-
范进中举一文的中心思想
已经有5人回复
-
2026国自然函评费到账
已经有17人回复
-
让我中一个面上吧！
已经有15人回复
-
2026年的国家社科基金项目通讯评审的新规则与新动向、新挑战
已经有5人回复
-
跳槽后在研项目怎么办？
已经有10人回复
-
什么时候开奖？
已经有10人回复
-
今天放榜吗？
已经有16人回复
-
93BebMhtakh前后11位开头都是大写
已经有8人回复
-
只有每年这种时候来逛逛小木虫
已经有26人回复
2楼2012-01-06 12:39:14
【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
爱与雨下(金币+5): 2012-01-06 20:08:08
爱与雨下: 鼓励新虫~！ 2012-01-06 20:08:14
南宫辞(金币+20, 翻译EPI+1): ★有帮助 2012-01-07 15:57:06
爱与雨下(金币+18): 2012-01-31 10:03:19
爱与雨下: bb代发！ 2012-01-31 10:03:25
爱与雨下(金币+5): 2012-01-06 20:08:08
爱与雨下: 鼓励新虫~！ 2012-01-06 20:08:14
南宫辞(金币+20, 翻译EPI+1): ★有帮助 2012-01-07 15:57:06
爱与雨下(金币+18): 2012-01-31 10:03:19
爱与雨下: bb代发！ 2012-01-31 10:03:25
| Al–Si-β和Ti–Si-β在氟化物介质中在不接种和使用氢氧化四乙铵作为有机结构导向剂（OSDA）情况下，通过老化-干燥法合成。在老化-干燥法中，允许硅胶释放一些挥发物种（主要是乙醇和水）。在约一周时间里，样本被老化和干燥。有机溶剂被加入选定的老化-干燥的硅胶中，以测定他们作为辅助OSDA的作用。所有的样本在1-12天的时间在140C进行热液处理。结晶后，通过PXRD、SEM、TGADTG、FTIR、原子吸收、低温氮吸收、29Si MAS NMR和27Al MAS NMR去定它的具体特征。在进行所有的实验中，获得存的和良好结晶的沸石β样本。Ti和Al实验的样本分别达到约69%和64%的多形体A富集。Al实验样本较Ti实验样本现实较小的结晶尺寸。在β框架中引入Al已经被若干技术证明，并且Al/Si的比例与前体硅胶相似。然而，引入Ti是相当的低。 |
3楼2012-01-06 15:16:39
4楼2012-01-06 15:18:17
5楼2012-01-06 15:19:13
6楼2012-01-07 15:58:03
40