2D/2D Interface Construction And Synergistic Photothermal And Photocatalytic Mechaniam Research

Due to the increasing global energy scarcity and environmental pollution problems,there is an urgent need to develop and utilize clean and renewable energy sources.Photocatalysis is sought after by researchers as an important means to efficiently convert solar energy to chemical energy,but how to design efficient photocatalytic materials is a key challenge to improve photocatalytic performance.MOFs（metal organic polymeric materials）have the advantage of rich pores and good light trapping,ensuring that they have abundant active sites to improve photocatalytic activity.However,low catalytic performance,poor cycling stability and low electronic conductivity remain key bottlenecks plaguing MOFs-based photocatalysts,greatly limiting their future applications.Therefore,it is crucial to find an effective strategy to prepare MOFs-based photocatalysts with good electrical conductivity and excellent catalytic activity.In this paper,we select energy-level matched MXene materials and construct Ti₃C₂T_X/Cu TCPP heterostructures through the interfacial interaction between MOFs and MXene.The aim is to enhance the photogenerated carrier conductivity by strengthening the interfacial charge transfer between the materials,and to improve the photothermal and photocatalytic synergistic catalytic activity by means of high photothermal conversion efficiency.（1）Construction of heterostructures:2D/2D（X-TC/Cu-NS）heterostructures were obtained by simple co-precipitation method at 80℃with Ti₃C₂T_Xas the substrate and in situ growth of Cu-TCPP MOF nanosheets on its surface.The crystal structure,microscopic morphology,indicated energy and interfacial structure of X-TC/Cu-NS were also characterized and analyzed.（2）Photothermal catalytic antibacterial:The photothermal catalytic performance of X-TC/Cu-NS photocatalysts was evaluated by two antibacterial modes in vitro and in vivo under NIR 808 nm laser irradiation.2D/2D heterojunctions have enhanced photothermal catalytic activity,while the excellent photothermal performance can kill bacteria more effectively and improve the bacterial inhibition rate.0.8-TC/Cu-NS has the strongest photothermal catalytic The photothermal catalytic ability of 0.8-TC/Cu-NS was the strongest,with the efficiency of killing Escherichia coli and Staphylococcus aureus reaching 99.97%and 99.94%,respectively,within 10 min.In addition,in an in vivo antibacterial test on Kunming mice,the surface wounds of the mice basically healed after 14 days and no obvious inflammatory cells were observed in the organ tissues of the mice,demonstrating its excellent biocompatibility.（3）Light and heat synergistic catalytic degradation:The synergistic catalytic performance of the X-TC/Cu-NS catalyst was assessed by studying the synergistic catalytic degradation performance under simulated sunlight conditions.The results showed that the0.8-TC/Cu-NS heterogeneous structure exhibited excellent degradation efficiency for MB,Rh B and tetracycline organic pollutants.In addition the degradation efficiency of the organic pollutants was improved by a factor of approximately 3-5 compared to the single material and its catalytic stability was improved.