Now the Ag0 is effective to boost the photosynthetic water oxidation, it ARC 239 is necessary to confirm the influence of AgBr content on morphology and O2 evolution. Based on this assertion, SEM (see Fig. S10) analyses for IVTS prepared by adding different amount of AgBr were conducted to reveal the influence of AgBr content on inverse V-type structure. Obviously, when the amount of AgBr exceeds 0.680 mmol (see Fig. S10e and f), a large amount of the agglomerates appear on the surface to destroy the inverse V-type structure, illustrating excessive AgBr is unfavorable for achieving perfect duplication. Following that, UV–vis analyses (see Fig. 8a) were further employed to reveal the influence of AgBr content on light absorption. In the range of 360–750 nm wavelengths, the absorbance of IVTS gradually increases from 0.085 mmol, 1.360 mmol, 0.680 mmol, and 0.170 mmol to 0.340 mmol AgBr, suggesting that adding 0.340 mmol AgBr is appropriate to achieve the highest light harvesting capacity and maintain the perfect structure (see Fig. 2c). As a direct proof to this conclusion, photocatalytic O2 evolution by making the above samples as the catalysts were evolved to verify their optical activity. Unexceptionally, the yield of O2 is consistent with the above UV–vis analyses, proving AgBr content can pose a great influence on structure and optical activity of the final products.