溶剂热法合成NiFe2O4纳米颗粒及其光催化降解亚甲基蓝实验
Synthesis of NiFe2O4 nanoparticles by solvent thermal method and photocatalytic degradation of methylene blue with it
赵仰成 1李鑫 1吴柏志 1于硕硕 1张婷1
作者信息
- 1. 兰州理工大学 石油化工学院,甘肃 兰州 730050
- 折叠
摘要
本文以3 种溶剂合成了不同形貌特征的尖晶石型NiFe2O4 纳米颗粒,并利用紫外-可见分光光度计测试了其对工业标准染料亚甲基蓝(MB)的降解效率.结果表明,使用乙二醇为溶剂合成的NiFe2O4 纳米颗粒,催化剂用量为 4g·L-1、亚甲基蓝初始浓度为 20mg·L-1、pH值为 2～4、温度为 50℃、H2O2 投加量为 20mL·L-1,在紫外光源照射60min左右时,超过95.4%的亚甲基蓝染料被降解.表征结果表明,使用乙二醇为溶剂合成的NiFe2O4 有着轮廓清晰的纺锤体性质,伴随着多孔性以及高透明度,可以有效地对紫外光进行吸收,更快地形成电子-空穴对,对亚甲基蓝进行分解.通过自由基淬灭实验对制备的NiFe2O4 纳米粒子的光催化机理进行了研究,并通过重复循环实验研究了制备的NiFe2O4 纳米粒子的稳定性.
Abstract
This study synthesized spinel type NiFe2O4 nanoparticles with different morphology characteristics using three solvents,and tested their degradation efficiency on the industrial standard dye methylene blue(MB)using a UV visible spectrophotometer.The results showed that when using ethylene glycol as the solvent to synthesize NiFe2O4 nanoparticles,and the catalyst dosage was 4～5g·L-1,the initial concentration of methylene blue was 20mg·L-1,the pH value was 2～4,the temperature was 50℃,the hydrogen peroxide dosage was 20mL·L-1,more than 95.4%of the methylene blue dye was degraded when exposed to a UV light source for about 60 minutes.The characterization results indicate that NiFe2O4 synthesized using ethylene glycol as a solvent has well-defined spindle properties,accompanied by porosity and high transparency,which can effectively absorb ultraviolet light and form electron hole pairs faster to decompose methylene blue.The photocatalytic mechanism of the prepared NiFe2O4 nanoparticles was studied through free radical quenching experiments,and the stability of the prepared NiFe2O4 nanoparticles was studied through repeated cycling experiments.
关键词
溶剂热法/NiFe2O4/光催化/染料降解/降解机理Key words
solvent method/NiFe2O4/photocatalysis/dye degradation/degradation mechanism引用本文复制引用
基金项目
甘肃省科技重大专项(21ZD2JA001)
出版年
2024
NETL
NSTL
万方数据