Hierarchical 0D/2D Co3O4 hybrids rich in oxygen vacancies as catalysts towards styrene epoxidation reaction

Liu, Jiangyong; Chen, Tingting; Jian, Panming; Wang, Lixia

doi:10.1016/s1872-2067(18)63133-x

Cited by 54 publications

(17 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The best SO yield (70.2%) was obtained with 5 wt% of rGO and decreased when the rGO content increased; meanwhile, selectivity to BAL remained almost similar around 27%, regardless of the rGO content. These catalytic results improve those ones previously reported with catalysts such as Fe-sal-CMK-3, NiO NP and Au/L-Fe 3 O 4 , giving SO yields of 32.4%, 10.8%, and 53.4%, respectively [92][93][94]. NiCo-LDH/RGO catalysts showed remarkable stability along five catalytic runs, with styrene conversion decreasing only by around 2% and SO selectivity remaining constant.…”

Section: Oxidation Of Alkylaromaticssupporting

confidence: 84%

Layered Double Hydroxide/Nanocarbon Composites as Heterogeneous Catalysts: A Review

Tichit

Álvarez

2022

ChemEngineering

View full text Add to dashboard Cite

The synthesis and applications of composites based on layered double hydroxides (LDHs) and nanocarbons have recently seen great development. On the one hand, LDHs are versatile 2D compounds that present a plethora of applications, from medicine to energy conversion, environmental remediation, and heterogeneous catalysis. On the other, nanocarbons present unique physical and chemical properties owing to their low-dimensional structure and sp2 hybridization of carbon atoms, which endows them with excellent charge carrier mobility, outstanding mechanical strength, and high thermal conductivity. Many reviews described the applications of LDH/nanocarbon composites in the areas of energy and photo- and electro-catalysis, but there is still scarce literature on their latest applications as heterogeneous catalysts in chemical synthesis and conversion, which is the object of this review. First, the properties of the LDHs and of the different types of carbon materials involved as building blocks of the composites are summarized. Then, the synthesis methods of the composites are described, emphasizing the parameters allowing their properties to be controlled. This highlights their great adaptability and easier implementation. Afterwards, the application of LDH/carbon composites as catalysts for C–C bond formation, higher alcohol synthesis (HAS), oxidation, and hydrogenation reactions is reported and discussed in depth.

show abstract

Section: Oxidation Of Alkylaromaticssupporting

confidence: 84%

Layered Double Hydroxide/Nanocarbon Composites as Heterogeneous Catalysts: A Review

Tichit

Álvarez

2022

ChemEngineering

View full text Add to dashboard Cite

show abstract

“…Two satellites of Co 2p were located at the higher binding energy side of the Co 2p 3/2 and Co 2p 1/2 peaks, respectively, which confirmed the presence of oxidation states. 45,46 It should be noted that the spectral shape of Fe 2p and Co 2p for CFO before and subsequently decorated with laponite nanodisks remained almost similar, despite a slight difference in peak intensities. However, an obvious change was observed from the O 1 s spectra of CFO and 0.2L/CFO.…”

Section: Resultsmentioning

confidence: 93%

Bimetal oxalate‐derived synthesis of laponite‐decorated CoFe₂O₄ porous nanostructures for activation of peroxymonopersulfate towards degradation of rhodamine B

Wei

Song

Liu

et al. 2021

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND: Advanced oxidation processes based on sulfate radical have been widely employed for oxidation degradation of organic contaminants. Catalytic activation of peroxymonopersulfate (PMS) with transition metal oxides holds great promise for the generation of sulfate radical. In this work, laponite-decorated CoFe 2 O 4 porous nanostructures have been prepared through the thermal decomposition of laponite/oxalates, and evaluated as a magnetic catalyst to activate PMS for the oxidation of rhodamine B (RhB).RESULTS: The decoration of porous CoFe 2 O 4 microparticles with laponite was evidenced because of the presence of the vibration mode of Si O (at 1359 cm −1 ) in Fourier transform infrared spectra and the uniform distribution of Si and Mg elements from elemental mapping images. Decorating with laponite also resulted in an increase in amount of surface hydroxyl oxygen species, which facilitated the formation of Co OH complex for PMS activation. Furthermore, the enhanced activation of PMS with laponite-decorated CoFe 2 O 4 resulted in a faster removal (98.04%) of RhB as compared to undecorated CoFe 2 O 4 (79.62%) within 56 min. Meanwhile, the rate constant increased from 0.0288 (CoFe 2 O 4 ) to 0.0679 min −1 (laponite-decorated CoFe 2 O 4 ). The degradation rate of RhB progressively increased with reaction temperature and catalyst dosage. Scavenging and electron paramagnetic resonance tests manifested that the sulfate and superoxide radicals served as the major active species for the oxidation of RhB molecules. CONCLUSION:The above results demonstrated positive effects of laponite on the textural property, surface chemical states and catalytic activity of porous CoFe 2 O 4 microparticles. This study provides an insight into the promising role of laponite as an additive in improving PMS activation.

show abstract

“…48 The presence of a large amount of lower valent Sn 2+ species suggests the transformation between the valence states of Sn and the generation of abundant OV in the doped sample due to the charge imbalance induced by the substitutional doping of Co into the SnO 2 frameworks. 49,50 By estimating the areas that the fitted curves cover, the Sn 2+ /Sn 4+ molar ratio in the Co-SnO 2 is determined to be 0.55, which is prominently larger than that in the P-SnO 2 (0.14). Interestingly, the binding energies of the Sn 3d peaks in the Co-SnO 2 exhibit negative shifts as compared with those of the P-SnO 2 , revealing the occurrence of electronic regulation triggered by the hetero-atom doping effect.…”

Section: Resultsmentioning

confidence: 99%

Experimental and theoretical investigation of the tuning of electronic structure in SnO₂viaCo doping for enhanced styrene epoxidation catalysis

Liu

Shi

et al. 2022

Catal. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

show abstract

Hierarchical 0D/2D Co3O4 hybrids rich in oxygen vacancies as catalysts towards styrene epoxidation reaction

Cited by 54 publications

References 59 publications

Layered Double Hydroxide/Nanocarbon Composites as Heterogeneous Catalysts: A Review

Layered Double Hydroxide/Nanocarbon Composites as Heterogeneous Catalysts: A Review

Bimetal oxalate‐derived synthesis of laponite‐decorated CoFe₂O₄ porous nanostructures for activation of peroxymonopersulfate towards degradation of rhodamine B

Experimental and theoretical investigation of the tuning of electronic structure in SnO₂viaCo doping for enhanced styrene epoxidation catalysis

Contact Info

Product

Resources

About

Hierarchical 0D/2D Co3O4 hybrids rich in oxygen vacancies as catalysts towards styrene epoxidation reaction

Cited by 54 publications

References 59 publications

Layered Double Hydroxide/Nanocarbon Composites as Heterogeneous Catalysts: A Review

Layered Double Hydroxide/Nanocarbon Composites as Heterogeneous Catalysts: A Review

Bimetal oxalate‐derived synthesis of laponite‐decorated CoFe2O4 porous nanostructures for activation of peroxymonopersulfate towards degradation of rhodamine B

Experimental and theoretical investigation of the tuning of electronic structure in SnO2viaCo doping for enhanced styrene epoxidation catalysis

Contact Info

Product

Resources

About

Bimetal oxalate‐derived synthesis of laponite‐decorated CoFe₂O₄ porous nanostructures for activation of peroxymonopersulfate towards degradation of rhodamine B

Experimental and theoretical investigation of the tuning of electronic structure in SnO₂viaCo doping for enhanced styrene epoxidation catalysis