## 4 Significance of g-C\({}_{3}\)N\({}_{4}\) towards Energy Storage and Environmental Impacts
### g-C\({}_{3}\)N\({}_{4}\) for Energy Storage (Supercapacitor) Uses
The compact MoS\({}_{2}\) sheets grafted on g-C\({}_{3}\)N\({}_{4}\) have 2D/2D heterostructures geometries. Sufficient consistency, high surface area, outstanding electron-donor character, cheap, and environmentally friendly nature are some of the improved heterostructure qualities of graphitic carbon nitride [53]. Larger charge redistribution features on the interface coupled with more electrons onto the g-C\({}_{3}\)N\({}_{4}\) boost the substance's conductance. Polymeric metasurfaces, which are essentially metal nanoparticles connected to layered materials, metal-oxides, and multimetallic frameworks, have been used in the field of science and technology in the past [54; 55; 56]. The compositional, spectroscopy, and interface alterations of these nano-ranged substances have revealed their beneficial spectrum and physical characteristics, approaching individual dynamics. While the durability and specific energy distribution of double-layered capacitive substances, such as carbon nanotubes, have been established and appreciated, the power output constraint has also drawn a lot of interest. When superior electron capacitive components, such as graphene, activated carbon, metal oxide, transition sulfide, or conducting polymers [57; 58], are combined with carbon nanotube-oriented fibers, the conductivity of the native fibers can be greatly increased by maintaining the periodic features. In this context, [PERSON] and colleagues [59] constructed a CNT/graphene composite fiber by covering the as-prepared MWNT assemblies with colloidal GO and spinning them into fibers. The transfer tendency of electrons in the composite fiber is noticeably enhanced because of contact of the pi-pi bond between the graphene oxide sheet and the carbon nanotube, and the graphene oxide layer can reduce carbon nanotube packing and enhance ion pathways. In comparison to naked CNT fiber (630 MPa), the chemical-reduced blended fiber seems to have a mechanical property of 500 MPa, whereas the conductance of the fiber reinforcement can be as strong as 450 20 S/cm. In comparison to the 5.83 F/g of the pure CNT fiber, the mixed fiber's computed specific capacity was 31.5 F/g, while [PERSON] et al. [60] investigated a unique type of inductive carbon nanotube-graphene hybrid fiber under electrospinning chemical-reduced graphene within and covering the face of MWNT fiber during the drawing phase, based on a similar principle [61]. The functionalized fiber had electrical properties of 900 50 S/cm, whereas its impact resistance, stiffness, and modulus of rupture were all about 140 MPa, 2.58 GPa, and 6%, correspondingly. At a scanning speed of 2 mV/s, the specific capacity was considerably enhanced to 111 F/g. The co-spun CNT-based fiber could also improve the fundamental electrocatalytic activity as a comparison to the naked CNT fiber with the use of nanocrystals or nanoflakes. As a result, such nanomaterials or equivalents have been currently widely used in the creation of sophisticated raw resources or components for nanoelectronics and allied equipment [25; 62; 63].