Control of crystalline phase and morphology of calcium carbonate by electrolysis: Effects of current and temperature |
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| Affiliation: | 2. Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu, Japan;1. Ifremer, UMR 241 EIO, UPF-ILM-IRD, Labex Corail, B.P. 7004, 98719 Taravao, Tahiti, French Polynesia;2. Direction des Ressources Marines et Minières, Tahiti, French Polynesia;3. Espace Bleu, Bora-Bora, French Polynesia;4. Gauguin’s Pearl Farm, Rangiroa, French Polynesia;5. Ifremer, UMR 5244 IPHE, UPVD, CNRS, Université de Montpellier, CC 80, F-34095 Montpellier, France;1. Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China;2. New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei University of Technology, Wuhan 430068, China;3. State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fiber and Cable joint stock limited company, Wuhan 430073, China;1. Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen Durability Centre for Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China;2. Institute of Engineering Mechanics, China Earthquake Administration, Key Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, 150000 Heilongjiang, China;3. Division of Building Technology, Chalmers University of Technology, 41296 Gothenburg, Sweden;4. Institute of Technology for Marine Civil Engineering, Shenzhen Institute of Information Technology, Shenzhen 518172, Guangdong, China |
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| Abstract: | Calcium carbonate (CaCO3) can show various properties related to its different crystalline phases and is therefore a useful material for various applications. Wet processes are known to be suitable for preparing metastable CaCO3 polymorphs. Electrolysis has been proposed as a preparation method at ambient conditions. Although several electrolytic approaches have been reported, the effects of the applied current and temperature of the electrolyte on the crystalline phase and morphology of CaCO3 remain unclear. In the present study, we attempted the electrochemical preparation of CaCO3 particles under various electrolysis conditions and discuss the mechanism of CaCO3 particle formation. The crystalline phases and morphologies of the CaCO3 precipitates markedly changed depending on the applied current and method of cooling the electrolyte. We assume that these factors were governed by the degree of change in temperature, supersaturation, and pH of the electrolyte that were induced by differences in the electrolysis current. |
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| Keywords: | A: Powders: Chemical preparation E: Biomedical applications |
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