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4Â¥2015-05-23 17:54:44
genhunter
ÖÁ×ðľ³æ (ÖøÃûдÊÖ)
- ·ÒëEPI: 387
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1¡¢´Ó¶øÔÚ½þ×յĹý³ÌÖÐδÄܳä·Ö¸ºÔØÔÚÔØÌå±íÃæ£¬Ê¹µÃNiÁ£×ÓÁ¿²»×㣬δÄÜ´ïµ½Ó¦ÓеĴ߻¯Ð§¹û£¬»îÐÔϽµ¡£ Therefore during the extraction process, it failed to sufficiently coat the surface of the carrier, led to inadequate amount of N-particles (incorporated) to provide the catalytic activity that we had wished for 2¡¢Ö÷ÒªÊÇÓÉÓÚÓÍÏà¹ý¶àͬʱÓÃÓÚάϵ¡°Ë®ºË¡±±íÃæÄ¤µÄCTAB¹ýÉÙ£¬Ê¹µÃ¸Ã΢ÈéÌåϵµÄÎȶ¨ÐÔ±ä²î£¬NiÁ£×ÓÒ×ÓÚÎö³ö¡¢Ížۡ£µ±VÖµÖð½¥Ôö´óÖ±ÖÁ5:5ʱ£¬ÓÉÓÚÓÍÏàÆ«ÉÙ£¬ÌåϵÖÐÐγɵġ°Ë®ºË¡±½Ï´ó£¬ÆäÖÐÈÝÄÉNitÁ£×ӽ϶࣬Åöײ³Ì¶È¼Ó¾ç£¬´Ó¶øÔö´óÁË´ÓÌåϵÖÐÎö³öµÄNiµÄÌå»ý£¬½µµÍÁËNiµÄ´ß»¯Ð§ÂÊ¡£ This is mainly because there was too much oil phase in the system and too few CTAB to sustain the water core structure, which compromised the stability of the microemulsion and N-particles tend to aggregate and become phase separated. When the V value was gradually increased to 5:5, the system started to form large water cores due to reduced oil phase, more N-particles were entrapped, which led to more fractions of N-particles leaked out as a result of increased collision amount the particles themselves, reduced the catalytic activity of the N-particles. 3¡¢V=1:7ºÍ2:8ʱ£¬´ß»¯¼ÁµÄ´ß»¯»îÐÔºÍV=3:5²î±ð²»´ó£¬µ«ÔÚ×î¼Ñ»îÐÔµãÑ¡ÔñÐÔÏà¶Ô½ÏµÍ£¬Òò´ËÑ¡ÔñV=3:5ΪCTABÓëÕý¶¡´¼µÄ×î¼ÑÅä±È¡£ 3. When V=1:7 to 1:4 (Ó¦¸ÃÓÃ×îС¹«Ô¼Êý£¬¶ø²»ÊÇ2:8), the catalytic activity of the product( or catalyst) was not much different from that of V=3:5, however, the selectivity at the point the most catalytic activity was achieved was relatively poor, therefore the V=3:5 of CTAB:n-butanol was selected as the optimal ratio. |

2Â¥2015-05-23 17:19:10
wdren0623
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3Â¥2015-05-23 17:28:37
genhunter
ÖÁ×ðľ³æ (ÖøÃûдÊÖ)
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5Â¥2015-05-23 18:02:05














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