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北京石油化工学院2026年研究生招生接收调剂公告
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[求助] 氧化铝纳米颗粒制备

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Aluminum chloride hexahydrate (AlCl3.6H2O, Showa
Chemical Co., Japan) was used as starting material.
AlCl3.6H2O was dissolved in distilled water, and the pH
of resulting solution was 3.0. NH4OH as precipitation
agent was added into the solution, the pH of the solu-
tion was controlled to 7, 8, 9 and 10
, and the solution
stirred with a magnetic stirrer.  

文中的调控PH是怎么调控的,是在反应中通过滴加氨水的速率来调控的么? 还是通过其他方法来调控的? 在加入的初期 PH应该是从比较低, 逐渐增加到所需要的PH值, 然后就不再滴加? 或者缓慢滴加 以维持PH稳定么?
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