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´ß»¯¼ÁÑ»·Ê¹ÓÃʵÑé¾ßÌåÔõô²Ù×÷£¿ A total of 0.10 mL of aqueous 4-NP solution (0.005 M) was mixed with 1.0 mL of fresh NaBH4 (0.2 M) solution. Subsequently, 1.0 mL of aqueous dispersion of the Fe3O4@SiO2- Au@mSiO2 microspheres (0.3 wt %) was added, and solution was quickly subjected to UV-vis measurements; To study the reusability of the magnetic catalysts, the used magnetic microspheres were separated from the solution with a magnet after the monitoring whole reduction process was com- pleted. The recycled magnetic microspheres were washed with ethanol 6 times and with deionized water 3 times. Similar to the above reduction process, the obtained magnetic microspheres were redispersed with 1.0 mL of deionized water and mixed with 0.1 mL of aqueous 4-NP solution (0.005 M) and 1.0 mL of fresh NaBH4 (0.2 M) solution. After reaction for 20 min, the solution was measured using UV-vis spectroscopy. ÎÄÏ×ÖÐÒ»°ã¶¼ÊÇÕâô×öµÄ£¬µ«ÊÇ´ß»¯¼ÁµÄÁ¿ÌرðÉÙ£¬ÈÜÒºµÄÁ¿Ïà¶Ô½Ï¶à£¬ÓôÅÌú·ÖÀëÄÑ£¬ÕâôÉÙµÄÁ¿»¹Òª´¼Ï´¡¢Ë®Ï´¼¸´Î£¬´ß»¯¼ÁËðʧÑÏÖØ£¬ÇÒÒ×ÍžÛʧ»î¡£ ÇëÎÊ´ó¼Ò¾ßÌåÔõô²Ù×÷£¿´ß»¯¼ÁµÄÁ¿´ó¸Å¿ØÖÆÔÚ¶àÉÙ£¿Ë®Ï´Ê±¼ÓË®Á¿£¿Ë®Ï´ºóÖØÐ·ÖÉ¢Òª³¬ÉùÂ𣿳¬Éù¶à¾Ã£¿Ð»Ð»´ó¼Ò£¡ |
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