Bimetal oxide CuO/Co3O4 derived from Cu ions partly-substituted framework of ZIF-67 for toluene catalytic oxidation

Hierarchical MnOx/Co3O4 Nanoarrays on Ni Foam for Catalytic Oxidation of Volatile Organic Compounds

“…Up to now, catalytic oxidation technology was widely regarded as the most important and valid method due to its higher catalytic efficiency and lower consumption of energy. − The main catalytic oxidation technique was the construction and evolution highly efficient, cheap, and nontoxic catalysts . According to past reports, the types of catalysts mainly include transition metal (Co, Mn, Ce, Cu, Ni) oxides, − mixed oxides catalyst, , and noble-metal catalysts (Pd, Pt, Au). , Noble metal catalysts have high efficiency, persistence, high selectivity, and so on, but their practical application is greatly restricted because of their high cost. According to former reports, it was considered that transition metal oxide, for instance CeO 2 , , MnO x , − and Co 3 O 4 , ,, exhibited enormous potential to replace precious metal catalysts.…”

“…Continuous imported of toluene for 10 min, the peaks were detected at 1568, 1544, 1421, and 1378 cm −1 , which correspond to carboxylate groups. 12,29,41 This indicated the formation of important intermediates over MnO x /Co 3 O 4 / NF catalyst for toluene oxidation. Interestingly, we detected the CO 2 vibration peaks at 2360 and 2340 cm −1 , 12,42 and the band located about 3800−3500 cm −1 , which was attributed to the coordinated metal cations and water molecules.…”

Interfacial effects in CuO/Co3O4 heterostructures enhance benzene catalytic oxidation performance

“…1h), implying the successful formation of heterostructures. Further, it can also be seen that the lattice fringes of 0.231 and 0.252 nm correspond to the (211) and (002) planes of CuO, 56 and the lattice fringe of 0.244 nm is ascribed to the (311) plane of Co 3 O 4 . [57][58][59] Additionally, it can be obviously seen from Fig.…”

MOF-Derived Mesoporous and Hierarchical Hollow-Structured In2O3-NiO Composites for Enhanced Triethylamine Sensing

“…12−15 Recently, with the deepening of research, the mesoporous metal oxide semiconductors derived from metal−organic framework (MOF) have been successfully and widely used in various fields, for instance, supercapacitors, 16,17 lithium-ion batteries, 18,19 catalysts, 20,21 and gas sensors, 22−28 due to their advantages of larger specific surface area (SSA), larger pore volume, abundant mesoporous structure, and tunable morphology. Meanwhile, recent studies have shown that the cation-exchange approach can be applied for the fabrication of bimetallic metal−organic frameworkderived metal oxide composites composed of two dissimilar semiconducting materials, which is an emerging preparation 30 On the other hand, in addition to the regulation of microstructure of MOS, many studies have shown that the selectivity and other important sensing parameters of MOS gas sensor can be further improved through constructing metal oxide composites, due to the formation of the heterojunction accompanied with the charge transfer/separation, increased interfacial potential barrier energy. and the synergistic catalytic and geometrical effects.…”

“…For example, Guo et al prepared a MOF-derived CuO@NiO composite with a multilayer core–shell structure by controlling the exchange reaction of Ni and Cu ions, which was used to prepare lithium-ion batteries with excellent performance . Xu et al used preimmersion, replaced part of the Co ions in ZIF-67 with part of Cu ions and successfully synthesized CuO/Co 3 O 4 through pyrolysis, which has an excellent catalytic oxidation performance for toluene . On the other hand, in addition to the regulation of microstructure of MOS, many studies have shown that the selectivity and other important sensing parameters of MOS gas sensor can be further improved through constructing metal oxide composites, due to the formation of the heterojunction accompanied with the charge transfer/separation, increased interfacial potential barrier energy.…”