Jae Gu Jung, Ji Soo Roh, Jong Min Roh, Ho Bum Park, Si-Hyun Do
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引用次数: 0
摘要
本研究调查了在大气二氧化碳中使用 NaOH 与多金属阳离子（Ca2+、Mg2+、Fe2+ 和 Mn2+）共沉淀合成的多金属沉淀物（MMP）的鉴定，以及在 25 °C 下将 MMP 悬浮液与 1 bar 二氧化碳混合 2 小时（CO2-MMP），以评估其与二氧化碳的相互作用。经鉴定，MMP 是由层状双氢氧化物（LDH）、金属氢氧化物、金属氧化物和碳酸盐（次要成分）组成的复杂复合体。CO2-MMP 显示，由于 pH 值降低，形成了碳化矿物和溶解的 LDH 和 Mg(OH)2。CO2-MMP 对 CO2 的吸收量高达约 0.029 mg/mg，表明镁方解石/霰石和 CaFe-LDH 中的 Ca 参与了碳化过程。此外，二氧化碳反应还将 MMP 的 BET 表面积提高了 150%，这表明它具有与二氧化碳进行高效交互的潜力。这项研究为多金属阳离子的沉淀及其与二氧化碳的相互作用提供了宝贵的见解。
CO2-induced multi-metal (Ca, Mg, Fe, Mn) precipitates and its interaction with CO2
This study investigates the identification of multi-metal precipitate (MMP) synthesized by the co-precipitation of multi-metal cations (Ca2+, Mg2+, Fe2+, and Mn2+) using NaOH in the atmospheric CO2 and MMP-suspended solution with CO2 of 1 bar at 25 °C for 2 h (CO2-MMP) to evaluate the interaction with CO2. The MMP was identified as a complex composite consisting of layered double hydroxide (LDH), metal hydroxide, metal oxides, and carbonates as minor. The CO2-MMP shows the formation of carbonized minerals and dissolved LDH and Mg(OH)2 due to reduced pH. The CO2 uptake by CO2-MMP is as much as ~ 0.029 mg/mg, indicating the involvement of Ca from both Mg-calcite/aragonite and CaFe-LDH in carbonation. Moreover, the CO2 reaction improved the BET surface area of MMP by 150%, which indicates its potential for efficient CO2 interaction. This study provides valuable insights into the precipitation of multi-metal cations and their interaction with CO2.
期刊介绍：
Journal of Materials Research (JMR) publishes the latest advances about the creation of new materials and materials with novel functionalities, fundamental understanding of processes that control the response of materials, and development of materials with significant performance improvements relative to state of the art materials. JMR welcomes papers that highlight novel processing techniques, the application and development of new analytical tools, and interpretation of fundamental materials science to achieve enhanced materials properties and uses. Materials research papers in the following topical areas are welcome.
• Novel materials discovery
• Electronic, photonic and magnetic materials
• Energy Conversion and storage materials
• New thermal and structural materials
• Soft materials
• Biomaterials and related topics
• Nanoscale science and technology
• Advances in materials characterization methods and techniques
• Computational materials science, modeling and theory
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