The XRD pattern of Zinc oxide and zinc oxide in acrylic acid

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The XRD analysis of pure zinc oxide shows distinct peaks at 31.7, 34.4, 36.2, 47.5, 56.6, 62.9, and 67.9 (2-theta degrees). In contrast, zinc oxide dispersed in acrylic acid/IPA exhibits unexpected peaks at 21.6, 27.2, 32.7, 38.4, 44.1, 50.0, 62.1, and 68.5 (2-theta degrees), suggesting potential changes in crystallinity. Concerns were raised about the polymerization of acrylic acid, which could lead to the formation of poly-acrylic acid and additional peaks. The purity of the acrylic acid/IPA mixture and the possibility of forming a zinc soap during polymerization were also discussed. Overall, the discrepancies in the XRD patterns indicate that the medium significantly affects the zinc oxide's crystalline structure.
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the XRD pattern of Zinc oxide and zinc oxide in acrylic acid !

I did XRD analysis of zinc oxide, and its peaks are at 31.7, 34.4, 36.2, 47.5, 56.6, 62.9 and 67.9 (2-theta degree).

further, I did XRD of zinc oxide dispersed in acrylic acid/IPA. but it's weird ! Why I could got some peaks at 21.6, 27.2, 32.7, 38.4, 44.1, 50.0, 62.1 and 68.5 (2-theta degree), but these peaks are totally different from the peaks of pure zinc oxide ??!

Is it cause of the crystalline has been changed or destroyed ?

thanks for your teaching !
 
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Two big concerns with the medium:

1. Acrylic acid polymerizes pretty easily upon radiation. I would hardly be surprised if you've now got significant amounts of poly-acrylic acid in the medium, which may be producing the extra peaks.

2. What are the purity levels of AA/IPA?
 
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I dispersed ZnO particles in AA/IPA mixture which is 50:50 ratio.

And, I add 0.1g ZnO into 1g AA and 5g IPA, then did polymerization; but i could get the apparent peaks of ZnO particles in XRD analysis (there is no any peak )! that's weird !
 
Could you have formed an acrylic/zinc soap? When you polymerized the AA did you form a gel or did a solid ppt? If you are isolating a ppt, perhaps the zinc component remains in the IPA?
 

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