Moreover, the FTIR spectrum showed without the characteristic peak of A-type CO 3 2- substitution at 1540 cm -1 . The precipitation of HAP from digested CaCO 3 solution occurred at 3 hours, while the reaction from non-digested CaCO 3 solution occurred at 18 hours. The digestion of CaCO ...
3 FTIR spectra of gel-like (CaCO3)n oligomers. a, FTIR spectra showing the peak corresponding to the carbonate group in (CaCO3)n. b, The C–N bond in TEA. c, The N···H–O bond between TEA and protonated carbonate55. d, The spectra between 400 cm−1 and 4,000 cm−1 ...
Note that the calcite peaks at 712 and 874 cm−1 are missing from the spectrum of the carbonate globule from the grid sample. The same grid that yielded the characteristic ACC FTIR spectrum was also analysed by means of micro-focus XRD. A 2Θrange of 20 to 50° was selected ...
V., Chakrabarty, D., and Mahapatra, S.: Insights into the formation of hydroxyl ions in calcium carbonate: temperature dependent FTIR and molecular modelling studies, J. Mater. Chem., 10,Kuriyavar, S. I.; Vetrivel, R.; Hegde, S. G.; Ramaswamy, A. V.; Chakrabarty, D.; Mahapatra, ...
The calcium carbonate crystal covering EPS of Stenotrophomonas maltophilia BaSD-214 was evidenced by FTIR measurement. In particular, the FTIR spectrum (Fig. 7c) showed a wide band between 3700 and 3200 cm−1, characteristic for hydroxyl and amino groups, and they could be associated with ...
fibroin粉体碳酸钙carbonatesilkcalcium 研究与技术 ——第49卷 2012年06月第06期 Vol.49 No.06,Jun.2012 摘要:制备了不同质量分数的碳酸钙-丝素粉体材料,利用差热分析(DTA)、傅里叶红外光谱(FTIR)、X射线衍射(XRD)、扫描电镜 (SEM)测试技术,探究了不同质量分数对粉体中丝素蛋白凝聚态结构和碳酸钙晶型的影...
Fig. 3. FTIR spectra of C-S-H samples Ca/Si = 0.8 to 1.4 and C-S-H samples synthesised in NaOH (100 mmol/L) Ca/Si = 0.8 to 1.4. a) Range: 600–1800 cm−1, b) range: 3000–4000 cm−1 (hydroxyl stretching region). The band corresponding to the asymmetric stretching of ...
FTIR and FE-SEM/EDX analyses indicate the presence of silica at the center of the granulomas in these three biopsies. Another striking result is related to the presence of calcite, a calcium carbonate at the periphery of the granulomas. To our best knowledge, this is the first time that ...
www.nature.com/scientificreports OPEN A Chemical Template for Synthesis of Molecular Sheets of Calcium Carbonate received: 18 September 2015 accepted: 05 April 2016 Published: 05 May 2016 Ina Rianasari1,*, Farah Benyettou2,*, Sudhir Kumar Sharma1,*, Thomas Blanton3, Serdal ...
FTIR spectroscopy was also used for the characterization of synthetized calcium carbonate phases (Fig. 2g–k). Tapvsihebaferekaoatatbiuotstrneririsnbvaguetdtc7eab1dlca3tin otcedm2νs43−,ν41(02,Co5a0rOt. 78C347)C424− cscampmsey−−cm11tiranmundmeditcr...