Reduced Graphene Oxides Modified Bi₂Te₃ Nanosheets for Rapid Photo‐Thermoelectric Catalytic Therapy of Bacteria‐Infected Wounds

Abstract

Abstract Temperature variation‐induced thermoelectric catalytic efficiency of thermoelectric material is simultaneously restricted by its electrical conductivity, Seebeck coefficient, and thermal conductivity. Herein, Bi 2 Te 3 nanosheets are in situ grown on reduced graphene oxides (rGO) to generate an efficient photo‐thermoelectric catalyst (rGO‐Bi 2 Te 3 ). This system exhibits phonon scattering effect and extra carrier transport channels induced by the formed heterointerface between rGO and Bi 2 Te 3 , which improves the power factor value and reduces thermal conductivity, thus enhancing the thermoelectric performance of 2.13 times than single Bi 2 Te 3 . The photo‐thermoelectric catalysis of rGO‐Bi 2 Te 3 significantly improves the reactive oxygen species yields, resulting from the effective electron–hole separation caused by the unique thermoelectric field and heterointerfaces of rGO‐Bi 2 Te 3 . Correspondingly, the electrospinning membranes containing rGO‐Bi 2 Te 3 nanosheets exhibit high antibacterial efficiency in vivo (99.35 ± 0.29%), accelerated tissue repair ability, and excellent biosafety. This study provides an insight into heterointerface design in photo‐thermoelectric catalysis.