Sarabjeet Kaur , Kurosch Rezwan , Michaela Wilhelm
{"title":"用于高温CO2捕获的CaO/SiC(O)纳米复合材料:合成、表征和初始性能研究","authors":"Sarabjeet Kaur , Kurosch Rezwan , Michaela Wilhelm","doi":"10.1016/j.oceram.2025.100851","DOIUrl":null,"url":null,"abstract":"<div><div>This study presents the synthesis and characterization of CaO/SiC(O) nanocomposites via chemical modification of allylhydridopolycarbosilane (SMP) using two calcium precursors: calcium acetylacetonate (CaAcac) and calcium hydroxide (CaOH). ATR-FTIR analysis showed that CaAcac chemically interacts with SMP, promoting hydrosilylation and extensive cross-linking, while CaOH showed no interaction. Thermogravimetric analysis revealed higher than expected ceramic yields for CaAcac-modified SMP samples, whereas CaOH-modified SMP samples matched theoretical values. XRD and TEM results showed that CaAcac leads to mostly amorphous ceramics, while CaOH facilitated CaO crystallization at 600 °C. The nanocomposites captured 2–5 wt% CO<sub>2</sub> at 500 °C, which is comparable to the uptake of pure CaO derived from CaCO<sub>3</sub> due to their low CaO content (11–15 %). However, only the amorphous CaAcac modified nanocomposite can release the absorbed CO<sub>2</sub> at 500 °C in larger amounts of 66 wt%. CaAcac-modified SMP nanocomposites thus show a higher potential for CO<sub>2</sub> capture and release applications at moderate temperatures of 500 °C compared to CaOH-modified nanocomposites.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"24 ","pages":"Article 100851"},"PeriodicalIF":2.8000,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"CaO/SiC(O) nanocomposites for CO2 capture at higher temperatures: Synthesis, characterization, and initial performance studies\",\"authors\":\"Sarabjeet Kaur , Kurosch Rezwan , Michaela Wilhelm\",\"doi\":\"10.1016/j.oceram.2025.100851\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study presents the synthesis and characterization of CaO/SiC(O) nanocomposites via chemical modification of allylhydridopolycarbosilane (SMP) using two calcium precursors: calcium acetylacetonate (CaAcac) and calcium hydroxide (CaOH). ATR-FTIR analysis showed that CaAcac chemically interacts with SMP, promoting hydrosilylation and extensive cross-linking, while CaOH showed no interaction. Thermogravimetric analysis revealed higher than expected ceramic yields for CaAcac-modified SMP samples, whereas CaOH-modified SMP samples matched theoretical values. XRD and TEM results showed that CaAcac leads to mostly amorphous ceramics, while CaOH facilitated CaO crystallization at 600 °C. The nanocomposites captured 2–5 wt% CO<sub>2</sub> at 500 °C, which is comparable to the uptake of pure CaO derived from CaCO<sub>3</sub> due to their low CaO content (11–15 %). However, only the amorphous CaAcac modified nanocomposite can release the absorbed CO<sub>2</sub> at 500 °C in larger amounts of 66 wt%. CaAcac-modified SMP nanocomposites thus show a higher potential for CO<sub>2</sub> capture and release applications at moderate temperatures of 500 °C compared to CaOH-modified nanocomposites.</div></div>\",\"PeriodicalId\":34140,\"journal\":{\"name\":\"Open Ceramics\",\"volume\":\"24 \",\"pages\":\"Article 100851\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2025-09-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Open Ceramics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S266653952500118X\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Open Ceramics","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S266653952500118X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
CaO/SiC(O) nanocomposites for CO2 capture at higher temperatures: Synthesis, characterization, and initial performance studies
This study presents the synthesis and characterization of CaO/SiC(O) nanocomposites via chemical modification of allylhydridopolycarbosilane (SMP) using two calcium precursors: calcium acetylacetonate (CaAcac) and calcium hydroxide (CaOH). ATR-FTIR analysis showed that CaAcac chemically interacts with SMP, promoting hydrosilylation and extensive cross-linking, while CaOH showed no interaction. Thermogravimetric analysis revealed higher than expected ceramic yields for CaAcac-modified SMP samples, whereas CaOH-modified SMP samples matched theoretical values. XRD and TEM results showed that CaAcac leads to mostly amorphous ceramics, while CaOH facilitated CaO crystallization at 600 °C. The nanocomposites captured 2–5 wt% CO2 at 500 °C, which is comparable to the uptake of pure CaO derived from CaCO3 due to their low CaO content (11–15 %). However, only the amorphous CaAcac modified nanocomposite can release the absorbed CO2 at 500 °C in larger amounts of 66 wt%. CaAcac-modified SMP nanocomposites thus show a higher potential for CO2 capture and release applications at moderate temperatures of 500 °C compared to CaOH-modified nanocomposites.