cuncun 中国 Kong, Pengfei Cheng, xueyan 中国 Su, Qin Xinrui, Xin Liu, Jiale Wang, Yue Wang
Abstract Oxygen vacancies were introduced into CaCu3Ti4O12 using bisphenol A to enhance its UV-driven photodegradation of methylene blue. Structural and spectroscopic analyses confirmed successful vacancy formation. Radical trapping identified ·OH as a key species. Optimized samples achieved 84.68% removal (0.0061 min−1), far exceeding pristine CaCu3Ti4O12 (32.78%), via oxygen vacancies. This work provides a new route to optimize photodegradation performance of CaCu3Ti4O12 by the modulation of intrinsic point defect structure.