| 查看: 1686 | 回复: 11 | ||
| 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]
油相碳點純化問題 已有1人参与
|
||
|
?????С???????????????????}???????? ?@??????????????????c: Size-Controlled Soft-Template Synthesis of Carbon Nanodots toward Versatile Photoactive Materials Synthesis of Organic-Soluble Oleylamine-Capped CNDs : All chemicals were purchased from Sigma-Aldrich and used as received unless otherwise specifi ed. We add citric acid (1 g) and 0.5 M nitric acid (1 mL) to water (1 mL). Several controlled experi-ments were performed by varying the precursor (0.5 g of glucose, 1.0 g of fructose, 0.2 g of glycolic acid, and 0.2 g of glycine) and the mass of citric acid (0.2, 0.4, 0.6, and 0.8 g). The mixture was vigorously stirred to dissolve citric acid and then injected with x mL of oleylamine and y mL of octadecene, where x : y = 4:6, 3:7, 2:8, 1:9, and 0.5:9.5. The solution was vigorously stirred for 10 min to form a milky emulsion. The emulsion was heated to 250 ??C under argon for 2 h. Different reaction temperatures (160 and 200 ??C) were also tried. The color of the solution became transparent with raising temperature and fi nally turned to dark brown. The resultant solution was precipitated with methanol, isolated by centrifugation (3000 rpm for 10 min), and re-dispersed in hexane. This process was repeated three times to remove residuals. The final colloidal CNDs (??1 g) were dried in a vacuum oven (80 ??C) overnight and then stored in a desiccator for further use. ???????E?к??????? ?????????x???????????????????????UV?????????????l??????????{?????????????????????????????顣 С?????ν??|??????????}???????????????????????????λ??????????V?????????????? |
回复此楼» 猜你喜欢
无机化学论文润色/翻译怎么收费?
已经有230人回复
» 本主题相关价值贴推荐，对您同样有帮助:
- 台湾FDA 油品混充及違法添加銅葉綠素事件專區
已经有3人回复
- 【其他】世代蓄電池之新材料技術
已经有3人回复
3楼2016-01-12 11:21:28
tongtxuan
铁杆木虫 (著名写手)
- 应助: 102 (高中生)
- 金币: 4433.9
- 散金: 3508
- 红花: 28
- 帖子: 1455
- 在线: 736.2小时
- 虫号: 1310674
- 注册: 2011-05-30
- 专业: 无机非金属类光电信息与功
2楼2016-01-12 10:45:04
tongtxuan
铁杆木虫 (著名写手)
- 应助: 102 (高中生)
- 金币: 4433.9
- 散金: 3508
- 红花: 28
- 帖子: 1455
- 在线: 736.2小时
- 虫号: 1310674
- 注册: 2011-05-30
- 专业: 无机非金属类光电信息与功
4楼2016-01-12 11:39:30
|
????????^???????paper???f???????? ???????????飬??c???????????????s?|???????????飬??r??????????????m?????????? ????????飬?????????????????????_??paper?f??????Σ?????????????+??????????????飬 ?????????????+??????????????????飬 ??????????????+?????????????????????? ????????????????κ????????? ?@??????????????? ?x?x?? |
5楼2016-01-12 12:11:50
投票:
