## 1 Introduction  
Nanostructures offer many advantages that open horizons for a wide variety of applications. Development of zero-, one-, and two-dimensional nanostructures has been a very interesting field for research because of the unique and amazing properties of the nanomaterials [1; 2; 3]. Therefore, the nanoparticles and the nanofibers have unlimited uses in various fields [4; 5; 6].  
The most known tough magnetic material with a moderate saturation magnetization and high coercivity is cobalt ferrite. Also, it has high chemical stability and good mechanical hardness [7]. According to these advantages, it is considered a favorable material for magnetic fluids, permanent magnets, high-density magnetic recording [8], photo-magnetic material [9; 10], catalysis, and for modifying thawing agents [11]. A nanoscale design of magnetic materials leads to very promising phenomena in materials science. In this trend, magnetic nanocrystals were prepared by different synthetic methods [12; 13; 14]. However, the magnetic nanomaterials have a strong affinity to aggregate and form larger sizes because of their magnetic properties. This behavior leads to restrictions for their further applications. Therefore, in order to avoid particle agglomeration and control of particle size, many authors prepared magnetic nanoparticles dispersing in polymer, inorganic, amorphous, and vitreous matrices [15; 16]. Magnetic nanocomposites were also prepared and dispersed in silica matrix [17; 18; 19; 20].  
The incorporation of nanoparticles with nanowires into nano-net structures may be a good solution for preventing the agglomeration of magnetic nanoparticles. The challenge is to obtain technique for producing magnetic nano-nets structures. Nano-nets consist of nanoparticles interlinked through ultrathin nanowires or nanofibers. In this trend, two-dimensional nano-nets based on gelatin or nylon-6 were fabricated by using electrospinning technique [21; 22]. Also, the possibility of deliberately constructing tangled graphs and nets is canvassed [23].  
It is known that two-dimensional layered materials confine organic or inorganic species in only one dimension. Among layered materials, layered double hydroxides (LDHs) are a group of synthetic two-dimensional nanomaterials whose structures can be described as nanolayered ordered material, in which the layers are cationic in nature and thus capable of intercalation anions. In general, LDHs may be characterized by the general formula [MII\({}_{1-\mathrm{x}}\)MIII\({}_{\mathrm{x}}\)(OH)\({}_{2}\)]\({}^{\mathrm{x}}\)+(A\({}^{\mathrm{n}}\)-)\({}^{\mathrm{x}}\)/n.mH\({}_{2}\)O, where MII and MIII are di- and tri-valent metals, respectively; the value of x is equivalent to the molar ratio of MII/(MII+MIII) and A\({}^{\mathrm{n}-}\) is an anion [24; 25; 26; 27].  
In the present study, layered double hydroxides are used as a source for constructing magnetic nanolayered structures and nano-nets. Co-Fe layered double hydroxides were prepared and supported by cobalt ferrite nanoparticles. Also, the nano-nets composed of cobalt ferrite are formed through a controlled decomposition of the nanolayers of Co-Fe LDH. Hitherto, there are no reports about a technique for producing nano-nets from layered double hydroxides. However, in this study, we have used a special procedure to perform a limited decomposition for the prepared Co-Fe LDH. It depends on supporting cobalt ferrite nanoparticles on the Co-Fe LDH to act as a catalyst in presence of high pressure of methanol and ethanol. The magnetic parameters of the nano-nets and the supported LDH were examined and compared with the cobalt ferrite nanoparticles through vibrating sample magnetometer technique.