Photocatalytic degradation of LDPE film with Fe-Sr2Bi2O5 photocatalyst under UV and visible light irradiation

WU Pei; LUO Xuegang; LI Ke; ZHANG Sizhao

doi:10.11949/j.issn.0438-1157.20141736

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Photocatalytic degradation of LDPE film with Fe-Sr₂Bi₂O₅ photocatalyst under UV and visible light irradiation

更新时间：2025-12-10

- Photocatalytic degradation of LDPE film with Fe-Sr₂Bi₂O₅ photocatalyst under UV and visible light irradiation
- CIESC Journal Issue 5, Pages: 1939-1946(2015)
- 作者机构：
  
  1. 西南科技大学材料科学与工程学院,四川,绵阳,621010
  2. 生物质材料教育部工程研究中心,四川,绵阳,621010
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141736
  CLC： B324
- Online First：05 May 2015，
  
  Published：05 May 2015
- 稿件说明：
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WU Pei, LUO Xuegang, LI Ke, et al. Photocatalytic degradation of LDPE film with Fe-Sr₂Bi₂O₅ photocatalyst under UV and visible light irradiation[J]. CIESC Journal, 2015, (5): 1939-1946. DOI: 10.11949/j.issn.0438-1157.20141736.
DOI：

WU Pei, LUO Xuegang, LI Ke, et al. Photocatalytic degradation of LDPE film with Fe-Sr₂Bi₂O₅ photocatalyst under UV and visible light irradiation[J]. CIESC Journal, 2015, (5): 1939-1946. DOI: 10.11949/j.issn.0438-1157.20141736. DOI：

摘要

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。

Abstract

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.

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