胶原纤维负载铁Fe(Ⅲ)催化剂对邻苯二甲酸二甲酯的光助催化降解特性

Catalytic degradation of dimethyl phthalate by photo-assisted Fe(Ⅲ) immobilized collagen fiber

将Fe(Ⅲ)负载在胶原纤维上制备负载型铁催化剂(FeCF),并研究了该催化剂对邻苯二甲酸二甲酯(DMP)的非均相Fenton催化降解性能。结果表明:与FeCF/H2O2/暗光体系、FeCF/UV体系和H2O2/UV体系相比,FeCF/H2O2/UV体系对DMP的降解率明显提高。H2O2用量、反应温度是影响FeCF光助催化降解DMP的两个主要因素。在254nm紫外线照射下,当FeCF和H2O2的用量分别为1.0g.L-1和1.0mmol.L-1时,30min内即可将DMP 100%降解。此外,FeCF的最适pH值范围较宽,为3.07～7.96。FeCF使用5次后其光催化降解能力没有明显降低。因此,FeCF在治理DMP污染方面具有潜在的应用前景。

Fe （Ⅲ） immobilized collagen fiber （FeCF） catalyst was prepared and its photo-assisted catalytic degradation behaviors to dimethyl phthalate （DMP） were investigated. Compared with FeCF/ H2O2/dark, FeCF/UV and H2O2/UV reaction system, FeCF/H2O2/UV is more effective for degradation of DMP. It is found that the H2O2 concentration and temperature are the main factors that greatly influence the degradation performance of DMP. Under irradiation of UV 254 nm, 100% degradation of DMP can be obtained within 30 min when the dosage of FeCF and H2O2 is 1.0 g · L^-1 and 1.0 mmol · L^-1 respectively. In addition, FeCF is effective for the degradation of DMP in the wide pH range of 3.07 to 7.96, and its photo-assisted catalytic degradation activity has no obvious decrease in 5 cycles. So, there is a potential for FeCF to treat DMP pollutant.