文献类型：期刊文献

英文题名：Controllable synthesis and characterization of high purity calcium carbonate whisker-like fibers by electrochemical cathodic reduction method

作者：Meng, Guangyuan[1];Xu, Jiali[1];Cheng, Rui[1];Zhang, Xinwan[1];Huang, Qian[1];Liu, Yongdi[1];Chen, Peng[1];Zhang, Lehua[1,2,3]

机构：[1]East China Univ Sci & Technol, Natl Engn Lab Ind Wastewater Treatment, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2022

卷号：342

外文期刊名：JOURNAL OF CLEANER PRODUCTION

收录：;EI(收录号：20220811677871);WOS:【SCI-EXPANDED(收录号:WOS:000777259100004)】；

基金：This work was supported by the National Key Research and Development Program of China (Developing Highly Efficient Means of Water Utilization, 2019YFC0408202), the National Natural Science Foundation of China (NSFC) (21876050).

语种：英文

外文关键词：Electrochemistry; Calcium carbonate whiskers; Growth mechanism; Circulating water

摘要：Although the electrochemical method has been certificated as a promising way for the synthesis of calcium carbonate whiskers, researches on the controllability and efficiency are ignored. In this work, the electrochemical synthesis of calcium carbonate whiskers was studied to evaluate its controllability and efficiency. Micrograph and X-ray diffraction analysis results indicated calcium carbonate whiskers was successfully synthesized with a high production of 94.59% by using electrochemical method to stimulate cathodic reaction in calcium containing solution. Length and aspect ratio of whisker can be controlled by regulating nucleation and growth conditions. The optimal conditions for whiskers synthesis were nucleating 5 min at 18 V and growing 55 min at 2 V in the solution containing 600 mg/L of calcium chloride, 300 mg/L of sodium bicarbonate, and 150 mg/L of magnesium chloride with a constant temperature of 70 degrees C. The calcium carbonate whisker has an 18.78 mu m whisker length and 36.82 aspect ratio. The product morphology depended on the uniformity of carbonate and the presence of magnesium. The uniform distribution of the generated CO32- was responsible for producing CaCO3 whiskers. Besides, presence of magnesium can avoid of hydroxide overproduction and regulate supersaturation of CaCO3 during synthesis to control the one-dimensional growth of whiskers. This work demonstrated the potential of controllable and efficient synthesis of calcium carbonate whiskers using electrochemical method.