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Cited by 367 publications
(187 citation statements)
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“…Because pretreatment hydrolyzes the organic components, especially cellulose in rice husks, untreated RHA yielded a rougher surface. A similar trend is reported in the literature [8]. …”
Section: X-ray Diffraction and Amorphous Form Analysissupporting
confidence: 92%
See 1 more Smart Citation
“…Because pretreatment hydrolyzes the organic components, especially cellulose in rice husks, untreated RHA yielded a rougher surface. A similar trend is reported in the literature [8]. …”
Section: X-ray Diffraction and Amorphous Form Analysissupporting
confidence: 92%
“…Many researchers have been studying alternative ways to extract silica from rice husks more effectively. Silica has been prepared using different techniques, including vaporphase reaction [5], sol-gel [6], thermal decomposition methods [7] and acidic-basic pretreatments [8]. The aim of this study was to use a simple and effective way to obtain silica from rice husks at a relatively low temperature (500 • C), in the inert N 2 atmosphere, using acid, base and hot water pretreatment.…”
Section: Introductionmentioning
confidence: 99%
“…Other authors used thermal treatments at different temperatures and atmospheres with or without pretreatments 4,8,9,12,13 .…”
Section: Riverosmentioning
confidence: 99%
“…The rocking vibration of Si-O appears in a peak around 462 cm -1 while the asymmetric stretching and the symmetric stretching of Si-O-Si is near to 800 cm -1 and 1088 cm -1 respectively [77], [78]. In addition, Bakar et al [39] reported infrared absorption peaks at 1044 cm-1, 796 cm-1 and 438 cm-1 attributed to SiO2 stretching and bending vibrations. As observed in Table 1, Table 2 andTable 4, RHA as produced (without any post treatment), presents larger particle sizes and lower surface areas as compared with some commercial silicas.…”
Section: Rice Husk Ash (Rha)mentioning
confidence: 99%
“…Within thermochemical treatments is found pyrolysis, gasification and combustion, being the last one the more attractive and studied process for the SiO2 production with minor unburnt compounds [36], [37]. Combustion of RH is not only a self-sustaining process minimizing the requirements for auxiliary fuel, but also allows the easy temperature control which is necessary to obtain amorphous structure RHA [6], [38], [39]. In this sense, amorphous nature of RHA is favored at temperatures lower than 700°C [37], [40].…”
Section: Introductionmentioning
confidence: 99%