J. R. Martínez, G. Martínez-Castañón, G. Ortega-Zarzosa, J. A. Cruz-Mendoza, S. Palomares-Sánchez, F. Ruiz
{"title":"叶绿素掺入对热处理二氧化硅干凝胶结构的影响","authors":"J. R. Martínez, G. Martínez-Castañón, G. Ortega-Zarzosa, J. A. Cruz-Mendoza, S. Palomares-Sánchez, F. Ruiz","doi":"10.1155/2007/23018","DOIUrl":null,"url":null,"abstract":"Composites containing chlorophyll aggregates dispersed in amorphous silica are of interest because of their optical attractive properties. The silica powders added with chlorophyll species, prepared by the sol-gel method, were studied using X-ray diffraction, IR spectroscopy and differential temperature analysis. Silica xerogel samples were prepared using an ethanol/H2O/TEOS molar ratio of 4:11.6:1 and loaded with extracts from frozen spinach leaves. The silica xerogel microstructure of the powders was studied as a function of the annealing temperature. We found in our samples partial crystallization of the glass matrix in form of tridymite and cristobalite phases and quenching centers or nonfluorescing aggregates due to denaturation of photosystem promoted by chlorophyll decomposition after 400∘C.","PeriodicalId":7345,"journal":{"name":"Advances in Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2007-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1155/2007/23018","citationCount":"5","resultStr":"{\"title\":\"Structural Effects of Heat-Treated Silica Xerogel Induced by Incorporation of Chlorophyll Species\",\"authors\":\"J. R. Martínez, G. Martínez-Castañón, G. Ortega-Zarzosa, J. A. Cruz-Mendoza, S. Palomares-Sánchez, F. Ruiz\",\"doi\":\"10.1155/2007/23018\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Composites containing chlorophyll aggregates dispersed in amorphous silica are of interest because of their optical attractive properties. The silica powders added with chlorophyll species, prepared by the sol-gel method, were studied using X-ray diffraction, IR spectroscopy and differential temperature analysis. Silica xerogel samples were prepared using an ethanol/H2O/TEOS molar ratio of 4:11.6:1 and loaded with extracts from frozen spinach leaves. The silica xerogel microstructure of the powders was studied as a function of the annealing temperature. We found in our samples partial crystallization of the glass matrix in form of tridymite and cristobalite phases and quenching centers or nonfluorescing aggregates due to denaturation of photosystem promoted by chlorophyll decomposition after 400∘C.\",\"PeriodicalId\":7345,\"journal\":{\"name\":\"Advances in Materials Science and Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2007-10-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1155/2007/23018\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advances in Materials Science and Engineering\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1155/2007/23018\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"Engineering\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advances in Materials Science and Engineering","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1155/2007/23018","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Engineering","Score":null,"Total":0}
Structural Effects of Heat-Treated Silica Xerogel Induced by Incorporation of Chlorophyll Species
Composites containing chlorophyll aggregates dispersed in amorphous silica are of interest because of their optical attractive properties. The silica powders added with chlorophyll species, prepared by the sol-gel method, were studied using X-ray diffraction, IR spectroscopy and differential temperature analysis. Silica xerogel samples were prepared using an ethanol/H2O/TEOS molar ratio of 4:11.6:1 and loaded with extracts from frozen spinach leaves. The silica xerogel microstructure of the powders was studied as a function of the annealing temperature. We found in our samples partial crystallization of the glass matrix in form of tridymite and cristobalite phases and quenching centers or nonfluorescing aggregates due to denaturation of photosystem promoted by chlorophyll decomposition after 400∘C.
期刊介绍：
Advances in Materials Science and Engineering is a broad scope journal that publishes articles in all areas of materials science and engineering including, but not limited to:
-Chemistry and fundamental properties of matter
-Material synthesis, fabrication, manufacture, and processing
-Magnetic, electrical, thermal, and optical properties of materials
-Strength, durability, and mechanical behaviour of materials
-Consideration of materials in structural design, modelling, and engineering
-Green and renewable materials, and consideration of materials’ life cycles
-Materials in specialist applications (such as medicine, energy, aerospace, and nanotechnology)
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
