Demand for sensitive and selective sensing of hydrogen peroxide is high because of its importance in various fields. So, metal-free nanostructures of g-C₃N₄ were synthesized and characterized through different techniques. Characterizations showed that g-C₃N₄ physicochemical properties were depended upon the nanostructure. A porous, thin and fluffy structure was got from urea, which possessed a much higher surface area and pore volume as compared to the planar and crystalline structured g-C₃N₄ got from melamine. A fluorescence quenching approach of hydrogen peroxide determination using catalyst nanosheets was used to explore the catalytic activity of these nanostructures. Because of the porosity, structural defects, smaller-crystallite size, and large surface area of the fluffy structured catalyst showed better quenching efficiency as compared to the flat and planar structured g-C₃N_4. An oxygen atom in urea played a role in changing the textural properties to porous and fluffy g-C₃N₄. Based on that, a selective, sensitive, and rapid sensing method was established having a wide linear range of 90–2500 nM, a lower detection limit of 73 nM, and a quantification limit of 220 nM.

由于过氧化氢在各个领域中的重要性，因此对过氧化氢的灵敏和选择性感测的需求很高。因此，合成了gC ₃ N ₄的无金属纳米结构，并通过不同的技术对其进行了表征。表征表明，gC ₃ N _4的理化性质取决于纳米结构。由尿素获得的多孔，薄而蓬松的结构，与平面和晶体结构的gC ₃ N ₄相比，具有更大的表面积和孔体积得自三聚氰胺。使用催化剂纳米片的过氧化氢荧光猝灭法被用来探索这些纳米结构的催化活性。由于孔隙，结构缺陷，较小的微晶尺寸和较大的蓬松结构催化剂，与平面和平面结构的gC ₃ N ₄相比，淬火效率更高。尿素中的氧原子起着改变催化剂结构的作用。 gC ₃ N _4的多孔性和蓬松性的结构特性。在此基础上，建立了一种选择性，灵敏和快速的检测方法，其线性范围为90–2500 nM，检测下限为73 nM，定量限为220 nM。