Controllable Preparation and Fluorescence Property of Conch-like Self-assembled Calcium Carbonate†

doi:10.7503/cjcu20170344

Abstract

Abstract:

Using liquid phase precipitation method, special conch-like calcium carbonate particles were prepared with bismuth nitrate as an additive at 60 ℃. The structure and performance of the resulting calcium carbonate were characterized by means of scanning electron microscopy(SEM), X-ray diffraction(XRD), thermogravimetric analysis(TGA) and atomic fluorescence spectroscopy(AFS). The results showed that the fluorescence of the conch-like calcium carbonate particles was enhanced obviously. Bi³⁺ played a significant controlling role in the nucleation process of calcium carbonate.

Key words: Calcium carbonate, In situ preparation, Precipitation reaction, Conch-like morphology

CLC Number:

O614
O647

TrendMD:

ZHAO Lina, CAO Yang. Controllable Preparation and Fluorescence Property of Conch-like Self-assembled Calcium Carbonate^†[J]. Chem. J. Chinese Universities, 2017, 38(12): 2144.

Figures/Tables 6

Fig.1 SEM images of CaCO3 obtained in the absence(A) and in the presence(B) of Bi(NO3)3

Fig.2 XRD pattern of conch-like CaCO3 obtained in the presence of Bi(NO3)3

Fig.3 TGA curves of CaCO3 obtained in the absence(a) and in the presence(b) of Bi(NO3)3

Fig.4 AFS spectra of CaCO3 obtained in the absence(a) and in the presence(b) of Bi(NO3)3

Fig.5 SEM images of CaCO3 particles obtained in the presence of Bi(NO3)3 at 20 ℃(A),40 ℃(B), 60 ℃(C) and 80 ℃(D)

Fig.6 XRD patterns of CaCO3 obtained in the presence of Bi(NO3)3 at 20 ℃(A),40 ℃(B), 60 ℃(C) and 80 ℃(D)

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