Facile synthesis of Co3O4@SiO2/Carbon Nanocomposite Catalysts from Rice Husk for Low-Temperature CO Oxidation

Opportunities and Challenges of Plant Bioactive Compounds for Food and Agricultural-Related Areas

“…Furthermore, agro-industrial/food wastes can be used for the synthesis of catalysts and nanocomposites. Corn, rice, and areca nut husk are some of the examples of raw materials considered residues that can be used in the biofuel production chain [126][127][128][129]. For example, Rice Husk (RH) and Rice Husk Ash (RHA) can be used to synthesize silica-based materials into zeolites and MCM-type structures due to the silicon (Si) contained in these co-products.…”

Microalgae-derived Co3O4 nanomaterials for catalytic CO oxidation

“…As mentioned, current research typically focused on Co 3 O 4 NMs synthesized via chemical or physical approaches, combined with characterization and catalytic activity testing. [7][8][9][10][11][12][18][19][20] Several spectroscopic and theoretical studies aimed at identifying the CO oxidation reaction mechanism on Co 3 O 4 NMs. 8,[21][22][23][24][25][26][27] While Pollard et al suggested CO adsorption on Co 2+ , other (theoretical) studies suggested CO adsorption on Co 3+ ions as active sites.…”

“…5,6 Apart from well-established noble metal catalysts, cobalt( ii , iii ) oxide nanomaterials (Co 3 O 4 NMs) have received considerable attention due to their abundance, low production costs, and excellent low-temperature catalytic performance. 7–12…”

“…5,6 Apart from well-established noble metal catalysts, cobalt(II,III) oxide nanomaterials (Co 3 O 4 NMs) have received considerable attention due to their abundance, low production costs, and excellent low-temperature catalytic performance. [7][8][9][10][11][12] Despite progress and improvements in Co 3 O 4 catalyst design, the synthesis methods are usually chemical or physical, while a biological approach has not yet been studied extensively. The typical synthesis routes oen involve expensive and hazardous chemicals and procedures that counterproductively may impose negative effects on the environment.…”

Magnetic cobalt oxide supported organosilica-sulfonic acid as a powerful nanocatalyst for the synthesis of tetrahydrobenzo[a]xanthen-11-ones

“…In addition, due to the presence of the hydroxyl groups on the silica surface, various catalytic functional moieties can be immobilized on it to increase the stability and performance of the final catalysts 40 – 42 . Some of recently reports in this matter are Co 3 O 4 @SiO 2 @TiO 2 -Ag 43 , Fe 3 O 4 @SiO 2 @GO 44 , Co 3 O 4 @SiO 2 /carbon nanocomposite 45 , Co 3 O 4 @SiO 2 -nylon6 37 , Fe 3 O 4 @SiO 2 -supported IL/[Mo 6 O 19 ] 46 and Fe 3 O 4 @SiO 2 @(BuSO 3 H) 3 47 .…”