Controlled porous hollow Co3O4 polyhedral nanocages derived from metal-organic frameworks (MOFs) for toluene catalytic oxidation

Zhao, Jiuhu; Tang, Zhicheng; Dong, Fang; Zhang, Jiyi

doi:10.1016/j.mcat.2018.10.020

Cited by 130 publications

(51 citation statements)

References 49 publications

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“…It was shown that the obtained Co3O4 samples not only inherited the original shapes of the as-prepared precursors but also were composed of many interconnected nanoparticles. In other studies, Zhao et al 222 revealed that Co3O4 nanostructures retained the rhombic dodecahedral morphology of the ZIF-63 template after thermal treatment at 350 °C for 2 h in air. Wu et al 223 synthesized porous CuO hollow architectures with octahedral shape by annealing Cubased metal-organic framework ([Cu3(btc)2], btc -benzene-1,3,5-tricarboxylate) templates.…”

Section: Morphology Control Of Metal Oxides By Confinement Of Growth In Solid Matricesmentioning

confidence: 86%

Controlling the morphology of metal–organic frameworks and porous carbon materials: metal oxides as primary architecture-directing agents

et al. 2020

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Section: Morphology Control Of Metal Oxides By Confinement Of Growth In Solid Matricesmentioning

confidence: 86%

Controlling the morphology of metal–organic frameworks and porous carbon materials: metal oxides as primary architecture-directing agents

et al. 2020

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“…According to previous literatures, large specific surface area will greatly increase the adsorption and transfer rate of toluene molecules over the catalyst surface, thus reduces the mass transfer resistance, which promotes the catalytic activity of catalyst. [11,42] The correlation of T 50% and T 90% with the specific surface area is shown in Figure 11a. From above, the T 50% and T 90% gradually descend with the increase of specific surface area expect Ce 0.07 CoO.…”

Section: Discussionmentioning

confidence: 99%

“…For example, Ren et al [9] synthesized 3D hierarchical Co 3 O 4 nanocatalysts with five different morphologies by way of a hydrothermal process for toluene oxidation. Zhang et al [10] reported that Co 3 O 4 nanostructure catalysts grown on 3D nickel foam with ample surface Co 3+ species and surface adsorbed oxygen species could complete catalytic oxidation of toluene at 270 C. Zhao et al [11] synthesized a sequence of hollow Co 3 O 4 polyhedron via pyrolysis of ZIF-67 for total combustion of toluene. They found that high ion ratio of Co 3+ /Co 2+ on the catalyst surface, a great deal of surface adsorbed oxygen and the strongest characteristic peaks of Co O and OH groups obviously improved the performance of the catalysts.…”

Section: Introductionmentioning

confidence: 99%

Preparation of mesoporous Ce_xCoO as highly effective catalysts for toluene combustion: The synergetic effects of structural template and Ce doping

Liu

Fan

Song

2020

Applied Organom Chemis

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Cobalt-based catalyst, as a typical catalyst for volatile organic compounds (VOCs) combustion, has attracted extensive attention. However, the catalytic activity of pure Co 3 O 4 is difficult to meet the requirements of practical application especially at low temperatures. Therefore, it is key to find an effective way to improve the catalytic performance of Co 3 O 4. In this paper, Co 3 O 4 is modified by engineering a combination of structural template and Ce dopant. The various characterization results verify that the template agent and the doping of appropriate Ce lead to great changes in the texture property and low temperature reducibility of Co 3 O 4 , thus resulting in superior catalytic performances of obtained mesoporous Ce x CoO catalysts. In particular, the best catalyst, Ce 0.05 CoO, achieves a toluene conversion of T 90% at 238 C, which is significantly lower than many of the Co-based catalysts reported in previous literatures. Furthermore, the toluene conversion rate maintains above 90% during 100 h at 238 C. The excellent catalytic performance of Ce 0.05 CoO can be attributed to its large specific surface area, uniform pore structure, good low temperature reducibility, and abundant surface oxygen species.

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“…Zhao et al synthesized a series of hollow Co 3 O 4 polyhedron with different sizes by the pyrolysis of ZIF-67. The obtained cobalt-based metal–organic framework owned superior catalytic performance and stability for toluene oxidation [ 94 ]. Zhang et al developed MOF-derived a mesoporous/microporous Mn 2 O 3 catalyst with a high surface area (141.5 m 2 /g) which exhibited excellent catalytic activity for the oxidation of toluene.…”

Section: Some Metal–organic Frameworkmentioning

confidence: 99%

Recent Progress in Metal–Organic Framework-Derived Nanostructures in the Removal of Volatile Organic Compounds

et al. 2021

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Air is the most crucial and life-supporting input from nature to the living beings of the planet. The composition and quality of air significantly affects human health, either directly or indirectly. The presence of some industrially released gases, small particles of anthropogenic origin, and the deviation from the normal composition of air from the natural condition causes air pollution. Volatile organic compounds (VOCs) are common contaminants found as indoor as well as outdoor pollutants. Such pollutants represent acute or chronic health hazards to the human physiological system. In the environment, such polluted gases may cause chemical or photochemical smog, leading to detrimental effects such as acid rain, global warming, and environmental pollution through different routes. Ultimately, this will propagate into the food web and affect the ecosystem. In this context, the efficient removal of volatile organic compounds (VOCs) from the environment remains a major threat globally, yet satisfactory strategies and auxiliary materials are far from being in place. Metal–organic frameworks (MOFs) are known as an advanced class of porous coordination polymers, a smart material constructed from the covalently bonded and highly ordered arrangements of metal nodes and polyfunctional organic linkers with an organic–inorganic hybrid nature, high porosities and surface areas, abundant metal/organic species, large pore volumes, and elegant tunability of structures and compositions, making them ideal candidates for the removal of unwanted VOCs from air. This review summarizes the fundamentals of MOFs and VOCs with recent research progress on MOF-derived nanostructures/porous materials and their composites for the efficient removal of VOCs in the air, the remaining challenges, and some prospective for future efforts.

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Controlled porous hollow Co3O4 polyhedral nanocages derived from metal-organic frameworks (MOFs) for toluene catalytic oxidation

Cited by 130 publications

References 49 publications

Controlling the morphology of metal–organic frameworks and porous carbon materials: metal oxides as primary architecture-directing agents

Controlling the morphology of metal–organic frameworks and porous carbon materials: metal oxides as primary architecture-directing agents

Preparation of mesoporous Ce_xCoO as highly effective catalysts for toluene combustion: The synergetic effects of structural template and Ce doping

Recent Progress in Metal–Organic Framework-Derived Nanostructures in the Removal of Volatile Organic Compounds

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Controlled porous hollow Co3O4 polyhedral nanocages derived from metal-organic frameworks (MOFs) for toluene catalytic oxidation

Cited by 130 publications

References 49 publications

Controlling the morphology of metal–organic frameworks and porous carbon materials: metal oxides as primary architecture-directing agents

Controlling the morphology of metal–organic frameworks and porous carbon materials: metal oxides as primary architecture-directing agents

Preparation of mesoporous CexCoO as highly effective catalysts for toluene combustion: The synergetic effects of structural template and Ce doping

Recent Progress in Metal–Organic Framework-Derived Nanostructures in the Removal of Volatile Organic Compounds

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Preparation of mesoporous Ce_xCoO as highly effective catalysts for toluene combustion: The synergetic effects of structural template and Ce doping