CAJ | 학술논문

采用共沉淀法合成的新型光催化剂（Fe-Sr2Bi2O5）与低密度聚乙烯（LDPE）通过熔融共混制备了一种新型光催化降解复合膜（Fe-Sr2Bi2O5/PE）。通过力学性能、接触角、傅里叶变换红外光谱（FT-IR）和场发射扫描电镜（FESEM）等表征手段研究了该催化剂在室温条件下固相光催化降解 LDPE 复合膜的性能变化。结果表明：Fe-Sr2Bi2O5在紫外光和可见光条件下对LDPE均具有较好的光催化降解能力，其中，紫外灯照射10 d后， Fe-Sr2Bi2O5/PE复合膜断裂伸长保留率低于5%，拉伸强度保留率低于40%，接触角降低22.52°，已完全脆化；同时，LDPE复合膜中出现明显的羰基等降解特征吸收峰和降解孔洞；与Sr2Bi2O5和TiO2相比，Fe-Sr2Bi2O5对LDPE具有更好的降解效果。综上所述，在紫外光和可见光条件下，Fe-Sr2Bi2O5对LDPE具有明显的光催化降解作用，为未来光催化降解聚乙烯（PE）提供了一定的新依据。
채용공침정법합성적신형광최화제（Fe-Sr2Bi2O5）여저밀도취을희（LDPE）통과용융공혼제비료일충신형광최화강해복합막（Fe-Sr2Bi2O5/PE）。통과역학성능、접촉각、부리협변환홍외광보（FT-IR）화장발사소묘전경（FESEM）등표정수단연구료해최화제재실온조건하고상광최화강해 LDPE 복합막적성능변화。결과표명：Fe-Sr2Bi2O5재자외광화가견광조건하대LDPE균구유교호적광최화강해능력，기중，자외등조사10 d후， Fe-Sr2Bi2O5/PE복합막단렬신장보류솔저우5%，랍신강도보류솔저우40%，접촉각강저22.52°，이완전취화；동시，LDPE복합막중출현명현적탄기등강해특정흡수봉화강해공동；여Sr2Bi2O5화TiO2상비，Fe-Sr2Bi2O5대LDPE구유경호적강해효과。종상소술，재자외광화가견광조건하，Fe-Sr2Bi2O5대LDPE구유명현적광최화강해작용，위미래광최화강해취을희（PE）제공료일정적신의거。
A novel Fe-Sr2Bi2O5 photocatalyst was synthesized with the co-precipitation method and added into a low density polyethylene (LDPE) film. The solid-phase photocatalytic degradation behavior of LDPE composite film under UV and visible light irradiation at room temperature was investigated and compared with the pure LDPE film, CaCO3/PE,Sr2Bi2O5/PE and TiO2/PE composite films,and the obtained sample were characterized with contact angle, Fourier transform infrared spectroscopy (FT-IR) and field emission scanning electron microscopy (FESEM), including the analyses for the mechanical properties of reserved elongation at break and reserved tensile strength. Fe-Sr2Bi2O5 had a high photocatalytic activity in degrading LDPE under UV light and visible light irradiation. After UV light irradiation for 10 d, reserved elongation at break and reserved tensile strength were lower than 5% and 40%, respectively; while contact angle was reduced by 22.52°. At the same time, carbonyl groups were detected in LDPE composite films and there were holes on the surface of LDPE around Fe-Sr2Bi2O5. Fe-Sr2Bi2O5 made photodegradation of LDPE more effective compared with Sr2Bi2O5 and TiO2 under UV or visible light degradation. In conclusion, LDPE could be degraded obviously by Fe-Sr2Bi2O5 under UV and visible light irradiation at room temperature, and Fe-Sr2Bi2O5 could be a new photocatalyst for photocatalytic degradation of polyethylene film in the future.