Facile Synthesis of Porous Flower‐Like Co₃O₄‐SiO₂ Composite for Catalytic Decoloration of Rhodamine B

Abstract

Flower‐like Co3O4‐SiO2 composite (FCSC) is prepared by a facile one‐pot two‐step solution synthesis followed by calcination. In our method, metalic Co nanoparticles are used as the starting material, which are oxidized to the flower‐like Co(OH)2 structure in the early stage of silica coating. The silica shell effectively keeps the 3D flower‐like structure from collapsing and also prevents the Co3O4 becoming large during calcination. The as‐prepared FCSC is investigated by scanning electron microscope (SEM), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM) and N2 adsorption/desorption measurements and a plausible formation mechanism is proposed. The final product has a large sepcific surface area of 347.6 m2⋅g−1 which shows superior catalytic performance in catalytic decoloration of rhodamine B with peroxymonosulfate (PMS), offering great promise for water treatment.

Hollow silica-coated porous carbon with embedded iron oxide particles for effective methylene blue degradation

“…These results indicate that 1.0-FCS-500 contained silica and carbon in its hollow structure, which is benecial for organic dye degradation. 29 The N 2 adsorption-desorption isotherms of 1.0-FCS-500 and 1.0-FC-500 are shown in Fig. 8; both samples showed type IV isotherms.…”

“…These results indicate that 1.0-FCS-500 contained silica and carbon in its hollow structure, which is beneficial for organic dye degradation. 29 …”

Degradation of methylene blue with magnetic Co-doped Fe3O4@FeOOH nanocomposites as heterogeneous catalysts of peroxymonosulfate

“…It might be possible that MeOH and IPA could not attach to the catalytic surface easily as they are hydrophilic substances. 42 Hence, the activation process of PMS and the generation of free radicals could mainly occur on the surface of the nanocomposite. In addition, the inhibiting effect of MeOH was stronger than that of IPA, suggesting that the generation amount of SO 4 À c was larger than that of $OH.…”

Investigation of Mechanical Behavior and Surface Characteristics of Cold Spray Metallized B4C/AA7075 Composites Coated by AZ64 Alloy through Plasma Electrolytic Oxidation

“…The aluminum-based PEO coating improved wear resistance by 87% compared to an Al coating and had corrosion resistance on par with pure aluminum [17][18][19]. Analyses were performed on the two CS + PEO dual coatings to determine their microstructure, mechanical characteristics, phase composition, wear, corrosion, and abrasion resistance [20,21]. Duplex coating, generally protected by magnesium and its coatings, particularly Al 2 O 3 , showed superior resistance to wear and corrosion (an improvement of 61% on the order of magnitude for each property).…”