摘要
采用酸法制备羟基氧化铁纳米粒子,以其为催化剂,以过氧化氢为氧化剂,进行甲基橙的催化降解反应并推断反应机理。研究催化剂加入量、氧化剂浓度、反应温度和反应p H等对甲基橙降解率的影响,并对催化剂的溶铁量进行测量。研究结果表明:当H2O2浓度为0.23 mmol/L,催化剂质量浓度为0.28 g/L,p H为2.54时,在60℃下反应30 min,质量浓度为9.41 mg/L的甲基橙的降解率为97.3%。在催化反应过程中发挥主要作用的OH?由均相催化反应和非均相的表面催化反应提供。由催化剂溶铁而进行的均相催化反应在甲基橙降解过程中可能发挥了重要作用。
FeOOH nanoparticles were prepared by acid method. The degradation of methyl orange in water was investigated using FeOOH as catalyst and H2O2 as oxidant. The effects of the amount of the catalyst, concentration of H2O2, temperature, and pH on the degradation of methyl orange were investigated. The amount of ferrous ions dissolved from FeOOH was measwed. The results show that when the mass concentration of FeOOH is 0.28 g/L, the concentration of H202 is 0.23 mmol/L, the pH is 2.54, the removal of methyl orange with mass concentration of 9.41 mg/L reaches 97.3% after reacting for 30 min at 60 ℃. In the process of the reaction, the most important oxidant OH. is produced by the homogeneous reaction and heterogeneous reaction. The amount of ferrous ions dissolved from FeOOH plays an important role in catalyzing degradation of methyl orange.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第2期416-420,共5页
Journal of Central South University:Science and Technology
基金
辽宁省高校重点实验室基金资助项目(LS2010122)
辽宁省自然科学基金资助项目(2014020139)~~
关键词
FEOOH
甲基橙
降解
反应机理
FeOOH
methyl orange
degradation
reaction mechanism
