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[求助] Si/Al变化了,但结晶度基本不变?

求助大家应该问题哈,我分别用醋酸(AC),盐酸(HA),硝酸(NA)对HBEA分子筛改性,改性后测得硅铝比和结晶度如图所示,测它们的最可几孔分别是HBEA:0.5nm, AC-BEA:0.5nm, HA-BEA:0.8nm, NA-BEA:0.8nm。我想问一下经过盐酸和硝酸改性后的分子筛硅铝比变化很大,且最可几孔也变化了,但是为什么结晶度基本不变呢?是因为我的XRD没有取小角度峰吗?

Si/Al变化了,但结晶度基本不变?
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