氧化铁纳米催化剂的生物合成及光催化性能研究  

Biosynthesis and photocatalytic performance of ferric oxide nanocatalysts

作　　者：薛珊 杨涛[1] 周宛欣 唐璇[1] XUE Shan;YANG Tao;ZHOU Wanxin;TANG Xuan(College of Chemistry and Chemical Engineering,Xi an Shiyou University,Xi an 710065,China)

机构地区：[1]西安石油大学化学化工学院,西安710065

出　　处：《功能材料》2022年第11期11150-11157,共8页Journal of Functional Materials

基　　金：陕西省重点研发计划项目(2019SF-263)。

摘　　要：分别研究了铜绿假单胞菌(Pseudomonas Aeruginosa)和贝莱斯芽孢杆菌(Bacillus Velezensis)生物合成氧化铁纳米颗粒(Fe_(2)O_(3)NPs)。研究了制备条件对铜绿假单胞菌和贝莱斯芽孢杆菌合成Fe_(2)O_(3)NPs的影响,优化了制备Fe_(2)O_(3)NPs的工艺参数,进行了XRD、BET、TEM、FT-IR等表征,探究了Fe_(2)O_(3)NPs的光催化降解性能。以甲基紫和异噻唑啉酮为有机污染物模型,探究其光催化性能。蓝光照射5 h后,Fe_(2)O_(3)@PA(由铜绿假单胞菌制备)与Fe_(2)O_(3)@BV(由贝莱斯芽孢杆菌制备)对甲基紫的降解率分别达到61.29%、69.87%。紫外光照射4.5 h后,在pH值为5的酸性环境下,Fe_(2)O_(3)@PA与Fe_(2)O_(3)@BV对异噻唑啉酮的降解率分别达到76.21%、82.13%。Biosynthesis of iron oxide nanoparticles(Fe_(2)O_(3) NPs)by Pseudomonas Aeruginosa and Bacillus Velezensis has been studied.The effects of preparation conditions on the synthesis of Fe_(2)O_(3) NPs by Pseudomonas Aeruginosa and Bacillus Velezensis were studied.The process variables of preparation Fe_(2)O_(3) NPs were optimized,the XRD,BET,TEM,FT-IR and other characterization of Fe_(2)O_(3) NPs were carried out to explore the catalytic degradation by visible light.Using methyl violet and isothiazolinone as organic pollutant models,their photocatalytic performance was explored.After 5 h of blue light irradiation,with the amount of catalyst 0.03 g and the initial concentration of methyl violet solution 10 mg/L,the degradation rates of methyl violet by Fe_(2)O_(3)@PA(prepared by Pseudomonas Aeruginosa)and Fe_(2)O_(3)@BV(prepared by Bacillus Velezensis)reached 61.29%and 69.87%,respectively.When the amount of catalyst was 0.03 g,the initial concentration of isothiazolinone solution was 30 mg/L and the pH was 5,after 4.5 h UV irradiation at pH 5,the degradation rates of Fe_(2)O_(3)@PA and Fe_(2)O_(3)@BV to isothiazolinone reached 76.21%and 82.13%,respectively.

关 键 词：生物合成 Fe_(2)O_(3)NPs 光催化降解 甲基紫 

分 类 号：TQ426[化学工程]