Schottky Junction Nanozyme Based on Mn-Bridged Co-Phthalocyanines and Ti 3 C 2 T x Nanosheets Boosts Integrative Type I and II Photosensitization for Multimodal Cancer Therapy.

Cancer phototheranostics have the potential for significantly improving the therapeutic effectiveness, as it can accurately diagnose and treat cancer. However, the current phototheranostic platforms leave much to be desired and are often limited by tumor hypoxia. Herein, a Schottky junction nanozyme has been established between a manganese-bridged cobalt-phthalocyanines complex and Ti 3 C 2 T x MXene nanosheets (CoPc-Mn/Ti 3 C 2 T x ), which can serve as an integrative type I and II photosensitizer for enhancing cancer therapeutic efficacy via a photoacoustic imaging-guided multimodal chemodynamic/photothermal/photodynamic therapy strategy under near-infrared (808 nm) light irradiation. The Schottky junction not only possessed a narrow-bandgap, enhanced electron-hole separation ability and exhibited a potent redox potential but also enabled improved H 2 O 2 and O 2 supplying performances in vitro . Accordingly, the AS1411 aptamer-immobilized CoPc-Mn/Ti 3 C 2 T x nanozyme illustrated high accuracy and excellent anticancer efficiency through a multimodal therapy strategy in in vitro and in vivo experiments. This work presents a valuable method for designing and constructing a multifunctional nanocatalytic medicine platform for synergistic cancer therapy of solid tumors.