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¿´ÁËһƪÎÄÏ×ÉÏÖÆ±¸N-doped TiO2 TiCl3¼ÓNa2S £¬ÔÙ¼Ó°±Ë®³Áµí·´Ó¦ÎªÊ²Ã´¾Í»áµÃµ½ N-doped TiO2 £¬Na2SµÄ×÷ÓÃÊÇʲô ÔÎĵÄʵÑ鲿·ÖÊÇÕâÑùдµÄ For the typical synthesis of the N-doped TiO2 powders, 50 mL of 15% titanium trichloride£¨48.6 mmol) was mixed with 50 mL of Na2S solution (51.2 mmol). The pH of this acidic solution was adjusted to 8.5 by slow addition of diluted NH3 solution. The precipitate formed at this pH was continuously stirred for 4 h. The precipitate was filtered and washed with double distilled water until the filtrate was free from chloride and sulfide ions. The oxide was calcined at different temperatures, viz., 400, 500, and 600 ¡ãC, for 4 h in air. Pure TiO2 was also prepared by a similar procedure without the addition of Na2S solution. |
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