**2. Experimental section**

**1.3 Graphitic carbon nitride (g-C3N4)**

*Assorted Dimensional Reconfigurable Materials*

ment threatening organic pollutants.

**1.4 Layered double hydroxides**

activity of photocatalysts.

**106**

improved photodecolorization of MB.

Graphitic carbon nitride (g-C3N4), is a two-dimensional metal-free conjugated crystalline sheet material with a bandgap energy of 2.7 eV, which has concerned exceptional research enthusiasm because of its environmental friendly nature, attractive electronic structure, low-cost excellent thermal and chemical stabilities [14–18]. The conduction and valence band boundaries of g-C3N4, exist at 1.12 and + 1.6 eV, making it active under visible light as an efficient photocatalyst [19–22]. Even though, its implication has drawbacks such as faster recombination of the electron-hole pairs, and agglomeration in most solvents caused by the strong van der Waals attractions between sp2 carbon atoms [23]. 2D g-C3N4, nanosheets have much attention because of their enlarged specific surface area, improved electron– phonon interaction, and enhanced electron mobility along the in-plane direction [24]. Although some developments have been attained, the light-harvesting ability and

For these reasons, various protocols such as surface modification, doping with metal or nonmetal elements and co-polymerization have been actively employed to enhance the photocatalytic performance of g-C3N4. It has high nitrogen content compared to other N-carbon materials, which is capable of creating more active reaction sites that would increase the electron donor/acceptor characteristics. Even after several decades and extensive investigations on several materials, a robust combination of materials and method is still required to vanish away the environ-

Layered double hydroxides (LDH), a new class of lamellar metal hydroxide materials, consist of positively-charged hydrotalcite-like layers with carbonate ions and water molecules in the interlayer galleries [25–27]. Due to the two dimensional (2D) layered structure, LDH has a high explicit surface area, which can help quick ion transfer [26, 28–30]. Dvininov et al. prepared the SnO2/Mg-Al

photocatalytic activity for methylene blue degradation [31]. It was made conceivable by the oxygen reduction and progressive creation of hydroxyl radicals, which are accountable for the degradation. Seftel et al. synthesized Ti incorporated Mg-Al LDH solid which shows better photocatalytic activity due to the isolation of small TiO2 nanoparticles on the LDH surface [32]. Kingshuk Dutta et al. prepared ZnO\Zn-Al LDH nanostructure by hydrothermal method using Al substrate as a template for developing different compositions and morphologies and the author demonstrated the degradation of Congo red dye [33]. Therefore, the LDH is a better candidate to be hybridized with ZnO which will enhance the catalytic

In any case, to build up a superior photocatalyst, hybridizing the LDH with a

approaches, which can further improve the charge transport proficiency of LDHcomposite. Xiaoya Yuan et al. prepared the g-C3N4\Zn-Al LDH composites through a simple in situ crystallization technique and the as-prepared composite exhibited

In the present work, we have prepared a ternary nanocomposite of g-C3N4 intercalated ZnO\Mg-Al LDH through a hydrothermal technique and studied its photocatalytic activity against the MB dye degradation. The ZnO is attached on the surface also interlayers of the LDHs, and ZnO\Mg-Al LDH are distributed over the surface of g-C3N4 nanosheets. The nitrogen-rich ternary composite formation

material having high conductivity and surface area is one of the hopeful

LDH coupling through the thermal treatment, which demonstrated good

quantum efficiency of these modified g-C3N4 systems are still poor.
