Full Solar‐Spectrum‐Driven Antibacterial Therapy over Hierarchical Sn₃O₄/PDINH with Enhanced Photocatalytic Activity

Abstract

Antibacterial photocatalytic therapy (APCT) is considered to be a potential treatment for administrating antibiotic‐resistant bacteria. However, due to the low photocatalytic efficiency and weak ability to capture bacteria, it is not practically applied. In this work, an organic–metal oxide hybrid semiconductor heterostructure is fabricated for the photocatalytic generation of reactive oxygen species (ROS) to kill the drug‐resistant bacteria. The organic semiconductor, perylene diimide (PDI), can self‐assemble on Sn3O4 nanosheets to form a “hook‐and‐loop” sticky surface that can capture bacteria, via large numbers of hydrogen bonding and π–π stacking interactions, which are not possible in inorganic semiconductors. This easy‐to‐fabricate hybrid semiconductor also possesses improved photocatalytic activity, which is owing to the formation of heterostructure that achieves full‐spectrum absorption, and the reduction of the photocarrier recombination rate to produce more reactive oxygen species. It has a good promoting effect on the wounds of mice infected by Staphylococcus aureus. This work shows new ideas for fabricating smart full‐spectrum inorganic–organic hybrid adhesive heterostructure photocatalysts for antibacterial photocatalytic therapy.

Advances in Hybrid Composites for Photocatalytic Applications: A Review

“…New methods for killing antibiotic-resistant bacteria have gained large interest in the last year, and in this field, photocatalysis is widely used. The hybrid photocatalyst studied by Yang et al [ 180 ] appears to be very efficient in capturing bacteria. TEM images of the Sn 3 O 4 /PDINH hybrid show an organic amorphous layer with a thickness of about 5nm on the surface of Sn 3 O 4 nanosheets.…”

“…( d ) Antibacterial performance of Sn 3 O 4 /PDINH heterostructure under NIR irradiation (λ > 700 nm). ( e ) GSH losing histograms after incubation with materials under simulated sunlight illumination or not [ 180 ].…”

Interface engineering in the hierarchical assembly of carbon-confined Fe3O4 nanospheres for enhanced microwave absorption

“…Heterogeneous structures integrate the unique functions of multi-phase components and have attracted extensive attention in various fields, such as energy storage systems, 1,2 catalysis, 3,4 biological medicine 5,6 and microwave absorption. 7,8 In the face of the 5G communication era, increasingly serious electromagnetic pollution from popular high-power electronic devices has raised the urgent requirement for designing high-performance microwave absorbers.…”

Simultaneously enhancing the photocatalytic and photothermal effect of NH2-MIL-125-GO-Pt ternary heterojunction for rapid therapy of bacteria-infected wounds

“…Among the many antibacterial methods, photocatalytic antibacterial is an efficient, energy-saving and universal method. The photocatalyst convert solar energy into chemical energy of redox reaction, and reacts with water and the dissolved oxygen in the water to produce various reactive oxygen species (ROS) such as hydroxyl radicals (·OH), superoxide anion (·O 2 − ), unisexual state oxygen ( 1 O 2 ) and so on, these ROS can effectively destroy bacteria cell membrane and the bacteria content so as to achieve an effective sterilization effect [ [6] , [7] , [8] ]. A large number of materials have been used for photocatalytic antibacterial research, such as CuS, Bi 2 S 3 , and so on [ [9] , [10] , [11] , [12] ].…”