Revealing the Role of Defect in <scp>3D</scp> Graphene‐Based Photocatalytic Composite for Efficient Elimination of Antibiotic and Heavy Metal Combined Pollution

Defect engineering can give birth to novel properties for adsorption and photocatalysis in the control of antibiotics heavy metal combined pollution with photocatalytic composites. However, role defects process mechanism are complicated indefinable. Herein, TiO2/CN/3DG was fabricated were introduced into tripartite structure separate O2 plasma treatment single component. We find that defect improve activity, attributing increase contribution from h+ OH. In contrast a tetracycline removal rate 75.2%, TC D-TiO2/CN/3DG has increased 88.5%. Moreover, reactive sites be by adsorbing on defective The construction TiO2 shows advantages degradation Cu2+ adsorption, but also suffers significant inhibition tetracycline/Cu2+ system. contrast, graphene achieve cooperative Cu2+. These findings provide new insights water strategies engineering.