Physical and Thermal Studies of Carbon-Enriched Silicon Oxycarbide Synthesized from Floating Plants

Processes

Thomas Chung-Kuang Yang¹  Guan-Ting Pan¹  Siewhui Chong²  Timm Joyce Tiong²  Yi Jing Chan²  Jun Wei Lim³  Chao-Ming Huang⁴  Pradeep Shukla⁵ 

[1] Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan;Department of Chemical and Environmental Engineering, University of Nottingham Malaysia, Broga Road, Semenyih 43500, Malaysia;Department of Fundamental and Applied Sciences, Centre for Biofuel and Biochemical Research, Institute of Self-Sustainable Building, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Malaysia;Green Energy Technology Research Centre and Department of Materials Engineering, Kun Shan University, Tainan 710, Taiwan;Queensland Alliance for Environmental Health Sciences, Faculty of Health and Behavioural Sciences, The University of Queensland, St Lucia, QLD 4072, Australia;

关键词: silicon oxycarbide;    thermal conductivity;    floating plants;    sioc;    silica;   

DOI  :  10.3390/pr7110794

来源: DOAJ

【 摘 要 】

In the present study, amorphous mesoporous silicon oxycarbide materials (SiOC) were successfully synthesized via a low-cost facile method by using potassium hydroxide activation, high temperature carbonization, and acid treatment. The precursors were obtained from floating plants (floating moss, water cabbage, and water caltrops). X-ray diffraction (XRD) results confirmed the amorphous Si–O–C structure and Raman spectra revealed the graphitized carbon phase. Floating moss sample resulted in a rather rough surface with irregular patches and water caltrops sample resulted in a highly porous network structure. The rough surface of the floating moss sample with greater particle size is caused by the high carbon/oxygen ratio (1: 0.29) and low amount of hydroxyl group compared to the other two samples. The pore volumes of these floating moss, water cabbage, and water caltrops samples were 0.4, 0.49, and 0.63 cm³ g⁻¹, respectively, resulting in thermal conductivities of 6.55, 2.46, and 1.14 Wm⁻¹ K⁻¹, respectively. Floating plants, or more specifically, floating moss, are thus a potential material for SiOC production.

【 授权许可】

Unknown