Nanofibers have been attracting growing attention owing to their outstanding physicochemical and structural properties as well as diverse and intriguing applications. Electrospinning has been known as a simple, flexible, and multipurpose technique for the fabrication of submicro scale fibers. Throughout the last two decades, numerous investigations have focused on the employment of electrospinning techniques to improve the characteristics of fabricated fibers. This review highlights the state of the art of melt electrospinning and clarifies the major categories based on multitemperature control, gas assist, laser melt, coaxial, and needleless designs. In addition, we represent the effect of melt electrospinning process parameters on the properties of produced fibers. Finally, this review summarizes the challenges and obstacles connected to the melt electrospinning technique.

Graphitic carbon nitrides (gCNs) are promising materials for multidisciplinary catalytic applications due to their inimitable physicochemical merits, thermal-physical-chemical stability, and rich electron density. The catalytic properties of gCNs are determined by their structure and composition; therefore, various methods have been developed for the rational synthesis of gCNs with different morphologies and compositions. Unlike other gCN nanostructures, one-dimensional (1D) nanostructures possess an outstanding accessible surface area, multiple adsorption sites, active catalytic sites, aspect ratio, and short electron-diffusion that enable their utilization in various gas conversion reactions. The thermal CO oxidation reaction (CO OR) on either gCNs or other catalysts is important in industrial, fundamental, and environmental issues; however, the reviews on 1D gCNs for CO oxidation is not yet reported. This chapter highlights the fabrication methods of 1D gCN nanostructures (i.e., nanotubes, nanorods, nanofibers, and needles) and their mechanisms and utilization in thermal CO ORs. Lastly, the current challenges and future prospects on gCNs for CO ORs are also discussed.