Inorganic Chemicals Industry ›› 2021, Vol. 53 ›› Issue (1): 97-101.doi: 10.11962/1006-4990.2020-0083

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Study on third-step infrared spectroscopy of calcium carbonate

Zhang Bin(),Xiao Xiao,Han Yunjiao,Zhang Yuanyuan,Yu Hongwei   

  1. College of Chemical Technology,Shijiazhuang University,Shijiazhuang 050035,China
  • Received:2020-07-27 Online:2021-01-10 Published:2021-01-08
  • Contact: Zhang Yuanyuan,Yu Hongwei E-mail:zhyy701@163.com

Abstract:

The calcium carbonate structure was studied by infrared(IR) spectroscopy.There were calcium carbonate CO3asymmetrical stretch vibrationmode(ν),calcium carbonate CO3 symmetrical stretching vibration mode(ν),calcium carbonate CO3 out-of-plane bending vibration mode(r) and calcium carbonate CO3 in-plane bending vibration mode(β).Temperature-dependent infrared(TD-IR) spectroscopy was also used to study the thermal stability of calci-um carbonate.In the temperature range of 293~393 K,the infrared absorption intensity and frequency of the main functional groups of calcium carbonate had some changes.Two-dimensional infrared(2D-IR) spectroscopy of the calcium carbonate(ν,r and β) were studied to the frequency information of the absorption peak change.The key roles of third-step IR spectroscopy in the analysis of structure and thermal stability of the important inorganic salt(calcium carbonate) were demonstrated.

Key words: calcium carbonate, structure, thermal stability, infrared spectroscopy

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