Abstract
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.
Highlights
Silicon oxycarbide (SiOC) is an important material that finds application in semiconductor devices [1,2], electrode materials of lithium–ion batteries [3,4], micro electromechanical systems devices [5], high temperature sensors [6], conductive protective coatings [7], and super-capacitor [8]due to its superior mechanical properties
Other literature (Table 3), the thermal conductivity of our floating-plant derived silicon oxycarbide (SiOC) samples. Thermal conductivity of these SiOC samples reduces in the order of floating moss (6.55 Wm K−1is), considerably higher and comparable with those made from chemical feedstock
Among with other literature (Table 3), the thermal conductivity of our floating-plant derived SiOC samples is the three floating plants: floating moss, water cabbage, and water caltrops, the floating mass plant is considerably higher and comparable with those made from chemical feedstock
Summary
Silicon oxycarbide (SiOC) is an important material that finds application in semiconductor devices [1,2], electrode materials of lithium–ion batteries [3,4], micro electromechanical systems devices [5], high temperature sensors [6], conductive protective coatings [7], and super-capacitor [8]. These observations motivated our research for synthesizing SiOC using plant based biomass and to evaluate its physical properties and thermal conductivity. Silicon oxycarbide materials were synthesized by using a facile and inexpensive route from floating plants (floating moss, water cabbage, and water caltrops). The characterizations of these silicon oxycarbide materials were studied with regards to their structural, morphology, functional group, textural properties, and thermal conductivity
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