Cobalt doped CuO nanoparticles as a highly efficient heterogeneous catalyst for reduction of 4-nitrophenol to 4-aminophenol

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

“…This growth has resulted in the formation of large contents of hazard compounds [1]. Many of these compounds are toxic, mutagenic and carcinogenic and may pose a threat to human life and environment [2][3][4]. One of the most important of the environmental problems is water pollution.…”

Hot electron prompted highly efficient photocatalysis based on 3D graphene/non-precious metal nanoparticles

“…Consider that the catalytic reaction follows the pseudo-rstorder kinetics with respect to the concentration of 4-NP with excess NaBH 4 , the apparent rate constant (k) can be calculated followed the kinetic equation given as: 1,42 ln C t /C 0 ¼ Àkt where, C 0 and C t are the initial concentration (t ¼ 0) of 4-NP and that at time t, respectively. The data of ln(C t /C 0 ) versus time (t) were linearly tted, and the slope of the plots was the rate constant (k).…”

“…The design and preparation of catalysts with high activity have attracted considerable research interest. [1][2][3] Noble metal-based materials, such as Pt, Au and their composites are effective catalysts because of their high catalytic activity. [4][5][6][7] However, the limited supply, high cost of these noble metal-based catalysts severely hinders their widespread implementation in their applications.…”

“…[8][9][10][11] The catalytic performance of a heterogeneous catalyst depends on its ability to bind with target molecules and facilitate electron transport or hydride transport for the reduction reactions. 1 Thus, it is critical to rationally design catalysts with abundant active centers, depending on the smaller size, high dispersibility and stability, as well as the desired high electron transport ability of the catalysts. 12,13 Coating a layer of carbon materials on the metal nanoparticles surface has become a promising method to obtain smaller and highly dispersive catalyst nanoparticles.…”

Preparation and Characterization of Co Doped Copper Oxide (II) Thin Filmsby 45º Angle Chemical Spraying Pyrolysis

“…Cobalt is already used as a dopant in COTF by many researchers recently [15,16,17] due to: (a) similarity in ionic radii between Co (0.082 nm) and Cu (0.096 nm) [18], (b) it's reported to be one among the primary nonprecious metal catalyst with properties quite almost similar to that of platinum [15].…”