Morphology‐Controllable Preparation of CeO2 Materials for CO2 Adsorption. Issue 1 (3rd January 2018)

• Record Type: Journal Article
• Authors: Zhao, Bosheng; Sha, Feng; Ma, Liang; Du, Hong; Qiao, Xianshu; Zhang, Jianbin
• Is Part Of: ChemistrySelect. Volume 3:Issue 1(2018)
• Page Start: 230
• Page End: 241
• Publication Date: 2018-01-03
• Subjects: KEYWORDS: carbon dioxide -- cerium carbonate hydroxide precursors -- cerium oxide -- CO2-storage material -- morphology control; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201702535
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Three morphology controllable CeO2 crystals were successfully synthesized via the thermal decomposition of CeCO3 OH precursors, which was newly prepared on the basis of a simple and template‐free hydrothermal reaction between CeCl3 solution and a CO2 ‐storage material (CO2 SM). In the formation processes of three CeCO3 OH precursors, the CO2 SM could be newly used as raw material and structural director. Meanwhile, the results presented the wider pH values (5.24‐8.35) for isoelectric point of CeCO3 OH precursors. After the CeCO3 OH precursors were isolated, the filtrate could be recycled to absorb CO2 again and prepare CeCO3 OH precursors with two special polymorphs. Three as‐prepared CeO2 crystals by annealing three CeCO3 OH precursors at 500 °C for 4 h showed the maximum adsorption amounts of 23.5, 18.7 and 20.5 mg/g for 8% CO2 /N2 mixture. As a result, this work provided the wider pH values for isoelectric point of CeCO3 OH precursors and a simple method for the preparation of CeO2 crystals with a short time and CO2 adsorption properties. Abstract : Morphology control in the synthesis of CeCO3OH precursors using the CO2SM, which was synthesized by absorbing CO2 with EG + EDA. And further calcining CeCO3OH precursors to prepare CeO2 could adsorb CO2. In the processes, the filtered solution could not only repeatedly absorb CO2 but also recycle to produce the same crystal phase CeCO3OH precursors after bubbling CO2. This cycle with the adsorption of CO2 for rapidly preparing CeO2 processes could potentially be optimized as a novel technique.