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Silica supported iron catalyst was prepared from rice husk ash (RHA) via the sol-gel technique using an aqueous solution of iron(III) salt in 3.0 M HNO3. The sample was dried at 110 degrees C and labeled as RHA-Fe. A sample of RHA-Fe was calcined at 700 degrees C for 5 h and labeled as RHA-Fe700. X-ray diffraction spectrogram showed that both RHA-Fe and… (More)
Silica-incorporated aluminum (RHA-Al) was synthesized from rice husk ash (RHA) using the sol-gel technique. RHA-Al was calcined at 500 degrees C for 5 h to yield RHA-Al(C). The ratio of silica to alumina was found to be 4:1. The BET analysis of RHA-Al(C) showed an increase in total pore volume and specific surface area compared to RHA-Al. SEM and XRD showed… (More)
Iron and 4-(methylamino)benzoic acid have been successfully incorporated into silica extracted from rice husk. The silica/Fe/amine complex, RH-Fe(5% amine), showed a ca. 24% increase in specific surface area compared to RH-Fe. This increase was attributed to the templated formation of regular pores. The XRD showed the RH-Fe(5% amine) to be amorphous. The… (More)
Metalloporhyrin ligand, [tetrakis(o-chlorophenyl)porphyrinato]Ni(II) was successfully immobilised onto inorganic silica support from rice husk ash via 3-aminoprorplytriethoxysilane (APTES) and the resulting catalyst was labeled RHACNiPor. This mesoporous organic-inorganic hybrid catalyst showed a high specific surface area of 190.0 m g. The Si MAS NMR… (More)
Sodium silicate from rice husk ash (RHA) was transformed to functionalized silica with 3-(chloropropyl)triethoxysilane (CPTES) via a simple sol-gel technique in a one-pot synthesis. The (29)Si MAS NMR of the organo-silica complex (RHACCl) showed the presence of T(2), T(3), Q(3) and Q(4) silicon centers. The (13)C MAS NMR showed that RHACCl had three… (More)
Titania and ceria incorporated rice husk silica based catalyst was synthesized via sol-gel method using CTAB and glycerol as surface directing agents at room temperature and labeled as RHS-50Ti10Ce. The catalyst was used to study the adsorption and photodegradation of methylene blue (MB) under UV irradiation. The powder XRD pattern of RHS-50Ti10Ce was much… (More)
Mesoporous wormlike nickel phyllosilicate was obtained from rice husk (agricultural biomass) by a simple, facile and template-free method which was carried out via sol-gel technique at room temperature. The synthesized nickel phyllosilicate had been characterized by various physico-chemical methods. Transmission electron micrographs revealed the formation… (More)
A series of iron incorporated silica catalysts were prepared using rice husk ash as a source of silica. The specific surface areas of the catalysts were found to be in the range of 200-400 m g. The activities of the catalysts were tested for liquid phase Friedel-Crafts acylation reaction of p-xylene with benzoyl chloride. The catalyst RHA-10Fe exhibited the… (More)
In the title compound, C(8)H(12)N(2)O(3)S·H(2)O, inter-molecular O-H⋯O and N-H⋯O hydrogen bonds and weak C-H⋯O inter-actions, which form R(1) (2)(6) and R(2) (2)(12) ring motifs, link the components into a three-dimensional network.
The name of one of the authors in the paper by Adam et al. [Acta Cryst. (2010), E66, o3033-o3034] is corrected.[This corrects the article DOI: 10.1107/S1600536810043941.].