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Sulfonic acid functionalized mesoporous ZSM-5 (SO 3 H-Meso ZSM-5) were prepared by post-grafting of 3-mercaptopropyltriethoxysilane with various loading in the range of 10¨C50 wt% followed by oxidation of thiol using H 2 O 2 to generate the corresponding sulfonic acid group.´óÉñ°ïæ·ÒëһϠ[ Last edited by liwentao2010 on 2014-10-10 at 18:46 ] |
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- Ó¦Öú: 7 (Ó×¶ùÔ°)
- ½ð±Ò: 246.3
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- Ìû×Ó: 1453
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- ³æºÅ: 3116612
- ×¢²á: 2014-04-06
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fatewu: ½ð±Ò+1, лл »ØÌû£¬»¶Ó³£À´½»Á÷~ 2014-10-11 08:28:02
xinxin1252: ½ð±Ò+2, ¡ï¡ï¡ïºÜÓаïÖú 2014-10-11 16:48:40
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fatewu: ½ð±Ò+1, лл »ØÌû£¬»¶Ó³£À´½»Á÷~ 2014-10-11 08:28:02
xinxin1252: ½ð±Ò+2, ¡ï¡ï¡ïºÜÓаïÖú 2014-10-11 16:48:40
| »ÇËá»ù½é¿×ZSM-5ÊÇÕâÑùÖÆ±¸µÄ£ºÏȼÓÈë3-Ûϱû»ùÈý¶¡Ñõ»ù¹èÍéÈ»ºó¼ÓÈëÖÊÁ¿·ÖÊýΪ5%µ½10%µÄ¹ýÑõ»¯ÇâÈÜÒºÖÆ³öÏàÓ¦µÄ»ÇËá»ù¡£²»ÖªµÀ¶Ô²»¶Ô¡£Ã»ÖƱ¸¹ý£¬zsm-5²»ÊǵÃÓйèÂÁÑõÈýÖÖÔªËØÂð£¿ÕÕÕâÑù×öµÃ»°£¬ÔõôûÓÐÂÁÔ´£¿»òÕßÊÇûÓÐÈ«²¿Ð´³ö¡£ |

2Â¥2014-10-11 00:13:22
xinxin1252
½ð³æ (СÓÐÃûÆø)
- Ó¦Öú: 3 (Ó×¶ùÔ°)
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- ³æºÅ: 2101047
- ×¢²á: 2012-11-01
- ÐÔ±ð: GG
- רҵ: ½ºÌåÓë½çÃæ»¯Ñ§
3Â¥2014-10-11 16:48:19
xinxin1252
½ð³æ (СÓÐÃûÆø)
- Ó¦Öú: 3 (Ó×¶ùÔ°)
- ½ð±Ò: 890.3
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- Ìû×Ó: 62
- ÔÚÏß: 73.3Сʱ
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4Â¥2014-10-11 17:02:07
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ľ³æ (ÖøÃûдÊÖ)
- Ó¦Öú: 7 (Ó×¶ùÔ°)
- ½ð±Ò: 246.3
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- ºì»¨: 6
- Ìû×Ó: 1453
- ÔÚÏß: 1359.2Сʱ
- ³æºÅ: 3116612
- ×¢²á: 2014-04-06
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5Â¥2014-10-11 22:14:07
СС³þ
ľ³æ (ÖøÃûдÊÖ)
- Ó¦Öú: 7 (Ó×¶ùÔ°)
- ½ð±Ò: 246.3
- É¢½ð: 320
- ºì»¨: 6
- Ìû×Ó: 1453
- ÔÚÏß: 1359.2Сʱ
- ³æºÅ: 3116612
- ×¢²á: 2014-04-06
- ÐÔ±ð: GG
- רҵ: ÉúÎﻯѧ

6Â¥2014-10-11 22:18:05
xinxin1252
½ð³æ (СÓÐÃûÆø)
- Ó¦Öú: 3 (Ó×¶ùÔ°)
- ½ð±Ò: 890.3
- ºì»¨: 2
- Ìû×Ó: 62
- ÔÚÏß: 73.3Сʱ
- ³æºÅ: 2101047
- ×¢²á: 2012-11-01
- ÐÔ±ð: GG
- רҵ: ½ºÌåÓë½çÃæ»¯Ñ§
|
a bs t r a c t Sulfonic acid functionalized mesoporous ZSM-5 (SO 3 H-Meso ZSM-5) were prepared by post-grafting of 3-mercaptopropyltriethoxysilane with various loading in the range of 10¨C50 wt% followed by oxidation of thiol using H 2 O 2 to generate the corresponding sulfonic acid group. Grafting of organic moieties was evidenced by elemental analysis, 29 Si&13 C-NMR and X-ray photoelectron spectroscopy. The SO 3 H-Meso ZSM-5 catalyst with improved acidity and mesoporosity exhibited enhanced catalytic activity in acid-catalyzed liquid-phase reaction of 2 ? -hydroxyacetophenone and benzaldehyde compared with non-functionalized mesoporous ZSM-5 (Meso ZSM-5) and functionalized microporous ZSM-5 (SO 3 H-ZSM-5). Thehigher loading of sulfonic acid functional groups led to higher acidity and consequently resulted in higher yield of products. The catalyst could be reused up to three cycles without significant loss in its catalytic activityÕâÊÇÕªÒª²¿·ÖÎÒ²»ÖªµÀÔõôÌí¼Ó¸½¼þ¾ÍÕâÑù·¢ÁËSulfonic acid functionalized mesoporous ZSM-5: Synthesis,characterization and catalytic activity in acidic catalysisÕâÊÇÎÄÕµÄÌâÄ¿·¢±íÔÚCatalysis TodayÉÏ |
7Â¥2014-10-12 21:41:13
СС³þ
ľ³æ (ÖøÃûдÊÖ)
- Ó¦Öú: 7 (Ó×¶ùÔ°)
- ½ð±Ò: 246.3
- É¢½ð: 320
- ºì»¨: 6
- Ìû×Ó: 1453
- ÔÚÏß: 1359.2Сʱ
- ³æºÅ: 3116612
- ×¢²á: 2014-04-06
- ÐÔ±ð: GG
- רҵ: ÉúÎﻯѧ

8Â¥2014-10-13 08:19:18
xinxin1252
½ð³æ (СÓÐÃûÆø)
- Ó¦Öú: 3 (Ó×¶ùÔ°)
- ½ð±Ò: 890.3
- ºì»¨: 2
- Ìû×Ó: 62
- ÔÚÏß: 73.3Сʱ
- ³æºÅ: 2101047
- ×¢²á: 2012-11-01
- ÐÔ±ð: GG
- רҵ: ½ºÌåÓë½çÃæ»¯Ñ§
9Â¥2014-10-13 08:59:21













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