▎ 摘　　要

NOVELTY - Photocatalytic material comprising egg shell membrane based metal doped carbon quantum dots conjugated with graphene oxide, is new. USE - The photocatalytic material is useful for removing dye from aquatic environment by degrading the dye (claimed) and in various fields of applications e.g. fluorescent mark, analysis, sensing and catalysis. ADVANTAGE - The photocatalytic material: utilizes carbon quantum dots and metal doped carbon quantum dots using poultry and household waste membrane procured from egg shells prepared by method which is simple to operate, easy to promote for multiple applications and cost-effective, and has high photo luminescent property that offers high stability over time and water dispersity, has higher quantum yield, provides better sensitivity and selectivity to mercury at a wider pH range; is easy and simple to handle, the degradation analysis is fast and efficient, is thus, particularly suitable for utilization and extension. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparation (M1) of photocatalytic material comprising egg shell membrane based carbon quantum dots conjugated with graphene oxide; removing (M2) dye from aquatic environment by degrading the dye using zinc doped carbon quantum dots conjugated with graphene oxide as photocatalyst, where the method of degradation of dye comprises (a) collecting the dye contaminated solution in a beaker, (b) adding the photocatalyst in proportions equivalent to the volume of contaminated solution, (c) irradiating the solution of step (b) under UV or sunlight for ≥ 1 hour, (d) collecting 5 ml of the irradiated solution and centrifuging, (e) collecting the centrifuged solution and recording the absorbance spectra to determine the amount of de removal and (f) estimating the degradation using UV/visible spectrophotometer by measuring absorbance of the dye solution before and after degradation; and environmental recycling (M3) of poultry and household waste membranes collected from hen egg shells for preparing the photocatalytic material for removal of dye from aquatic environment by degrading the dye.