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Eleventnini

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[求助] 二氧化钛与杂多酸的复合催化剂煅烧后是什么颜色?

将Ti(OBu) (6 mL)滴加到EtOH(24 mL)中,并强烈搅拌.在搅拌的同时,用浓
HC1将混合液的pH值调至1.5,在水浴40~50℃下,滴加0.05 mol/L 的PW溶液(3 mL)到上述混合液中,连续搅拌此酸性溶液直至形成均匀溶胶,然后100℃ 水浴蒸干,制得干凝胶,再在高温炉中于300℃下焙烧3 h制得复合催化剂。得到的催化剂的颜色灰色偏黑,泥土的颜色,不知在这方面的高手是否出现过这种情况?应该怎么解决呢?先谢谢了!
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