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Abstract：
Polyurethane/silk protein-bismuth halide oxide composite films were fabricated using a blending-wet phase transformationin situsynthesis method. The crystal structure, micromorphology, and optical properties were conducted using XRD, SEM, and UV-Vis DRS characterize techniques. The results indicated that loaded silk protein enhanced the hydrophilicity and pore structure of the polyurethane composite films. The active species BiOX were observed to grow as nanosheets with high dispersion on the internal skeleton and silk protein surface of the polyurethane-silk protein film. The photocatalytic efficiency of BiOX/PU-SF composite films was assessed through the degradation of Rhodamine B under visible light irradiation. Among the tested films, the BiOBr/PU-SF composite exhibited the highest removal rate of RhB at 98.9%, surpassing the removal rates of 93.7% for the BiOCl/PU-SF composite and 85.6% for the BiOI/PU-SF composite. Furthermore, an active species capture test indicated that superoxide radical (•O2-) and hole (h+) species played a predominant role in the photodegradation process.
摘要：
在原位合成方法中，使用共混-湿相变制备了聚氨酯/丝蛋白-卤化铋氧化物复合膜。晶体结构，微观形态，和光学性能进行了XRD，SEM,和UV-VisDRS表征技术。结果表明，负载蚕丝蛋白增强了聚氨酯复合膜的亲水性和孔结构。观察到活性物种BiOX在聚氨酯-丝蛋白膜的内部骨架和丝蛋白表面上生长为具有高分散性的纳米片。通过在可见光照射下降解罗丹明B来评估BiOX/PU-SF复合膜的光催化效率。在测试的电影中，BiOBr/PU-SF复合材料对RhB的去除率最高，为98.9%，BiOCl/PU-SF复合材料的去除率超过93.7%，BiOI/PU-SF复合材料的去除率超过85.6%。此外，活性物种捕获测试表明，超氧自由基（•O2-）和空穴（h）物种在光降解过程中起着主要作用。
