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[求助]
介孔二氧化硅合成出现大量微米级块状物质
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我是合成介孔二氧化硅的新手，体系：0.1gCTAB超声溶解于48mL水中，加入0.35mL2M氢氧化钠，80度机械搅拌30分钟。滴加0.5mLTEOS。80度机械搅拌2h.离心后用水洗和醇洗。还未进行煅烧，拿去测SEM之后出现了很多微米级块状物体，样品均一性也不好，请问哪位可以给些指导呀？谢谢 1_m001.jpg  1_m008.jpg |
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阳光西骑士
木虫 (正式写手)
- 应助: 33 (小学生)
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- 专业: 生物无机化学
4楼2016-12-15 22:42:20
2楼2016-12-15 14:07:07
阳光西骑士
木虫 (正式写手)
- 应助: 33 (小学生)
- 金币: 4566.4
- 散金: 1942
- 红花: 40
- 帖子: 853
- 在线: 1292.6小时
- 虫号: 1287066
- 注册: 2011-05-05
- 性别: GG
- 专业: 生物无机化学
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Synthesis of FITC–APTES A solution of FITC (8.6 mg) in anhydrous ethanol (2 mL) was mixed with APTES (0.197 mL) and then the mixture was stirred at room temperature for 24 h. The prepared FITC–APTES stock solution was kept at 4 °C. Synthesis of amino-modified MSNs (denoted as MSNs-NH2) The synthesis of MSNs-NH2 was similar to that of magnetic MSNs-NH2.18 Typically, 0.3 g CTAB and 0.1 g PVP30 were added to a solution containing 90 mL of deionized water and 60 mL of methanol. The solution was adjusted to pH 10.2 by an ammonia solution, and then 600 μL TEOS and 50 μL APTES were added. After stirring for 2.5 h at room temperature, the resultant particles were separated and washed with ethanol and water. The extraction of organic templates for the as-synthesized particles was performed by dispersing these particles into 50 mL of a mixed solution of ethanol and NH4NO3 (0.3 g) at 60 °C for 1 h. The synthesis of FITC-labeled MSNs-NH2 is similar to that of the unlabeled ones, except that FITC-APTES (50 μL) and APTES were added together during the condensation process. |
3楼2016-12-15 22:39:55
5楼2016-12-16 09:26:07
