十二烷基硫酸钠修饰NiFe2O4对亚甲基蓝的类芬顿催化氧化性能 Fenton-like catalytic oxidation of methylene blue by sodium dodecyl sulfate modified NiFe2O4期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

十二烷基硫酸钠修饰NiFe2O4对亚甲基蓝的类芬顿催化氧化性能

引用本文：	周自成,李煦,郭琳琳,范小振.十二烷基硫酸钠修饰NiFe2O4对亚甲基蓝的类芬顿催化氧化性能[J].化工进展,2019,38(12):5532-5538.

作者姓名：	周自成李煦郭琳琳范小振

作者单位：	沧州师范学院化学与化工学院,河北沧州,061001

基金项目：	河北省沧州市科技局重点研发计划指导项目(183105001)

摘要：	采用化学沉淀法制备了十二烷基硫酸钠（SDS）改性的纳米酸镍（记为NiFe₂O₄-S），利用X射线衍射（XRD）、红外光谱（FTIR）、能谱（EDS）、透射电镜（TEM）、BET比表面等技术手段对样品进行了表征。采用多相芬顿氧化技术，以亚甲基蓝溶液为模拟污染物废水，研究了SDS对铁酸镍的改性效果、亚甲基蓝溶液初始pH以及催化剂循环使用等不同条件因素对样品类芬顿催化活性的影响。结果显示，经SDS改性后的NiFe₂O₄-S比纯相NiFe₂O₄表现出了更优异的催化性能，NiFe₂O₄-S对酸性（pH=3.5）、近中性（pH=6.5）和碱性（pH=9.5）的亚甲基蓝溶液均有着较好的催化降解效果；NiFe₂O₄-S具有良好的催化稳定性和重复使用性。对该催化反应体系的作用机理进行了详细探讨，NiFe₂O₄-S表现出优异的类芬顿催化活性归因于更强的电子转移能力，吸附的SDS能促进H₂O₂和 $? O 2 -$ 分别与表面Fe³⁺反应将其还原转化为Fe²⁺。·OH是直接分解亚甲基蓝的活性物种，反应中NiFe₂O₄-S表面较高浓度的Fe²⁺可以有效地把H₂O₂分解为·OH。SDS增强了催化剂表面对亚甲基蓝的吸附能力，促进了·OH与亚甲基蓝的分解反应。
关键词：	铁酸镍(NiFe2O4) 表面活性剂十二烷基硫酸钠类芬顿废水亚甲基蓝降解
收稿时间：	2019-04-02
Fenton-like catalytic oxidation of methylene blue by sodium dodecyl sulfate modified NiFe2O4

Zicheng ZHOU,Xu LI,Linlin GUO,Xiaozhen FAN.Fenton-like catalytic oxidation of methylene blue by sodium dodecyl sulfate modified NiFe2O4[J].Chemical Industry and Engineering Progress,2019,38(12):5532-5538.

Authors:	Zicheng ZHOU Xu LI Linlin GUO Xiaozhen FAN

Affiliation:	College of Chemistry and Chemical Engineering, Cangzhou Normal University, Cangzhou 061001, Hebei, China

Abstract:	In this work, modified nano-NiFe₂O₄(marked as NiFe₂O₄-S) which was modified by sodium dodecyl sulfate was prepared by coprecipitation and characterized by XRD, FTIR，EDS, TEM, BET techniques. The heterogeneous Fenton reaction process on the degradation of methylene blue was studied by SDS modified NiFe₂O₄. The effect of SDS modification, initial pH of methylene blue solution and catalyst recycling times on Fenton-like catalytic activity were investigated. The results showed NiFe₂O₄-S prepared with SDS exhibited much higher catalytic activity for the degradation of methylene blue (MB) in acidic (pH 3.5), near-neutral (pH 6.5) and alkaline (pH 9.5) solutions conditions than pure NiFe₂O₄. NiFe₂O₄ had good catalytic stability and reusability. Mechanism of action was discussed and we considered that could be attributed to its higher electron transfer ability. The adsorbed SDS accelerated the reduction of surface Fe³⁺to Fe²⁺by H₂O₂ and $? O 2 -$ . The high concentration of Fe²⁺ on NiFe₂O₄-S surface during the reaction promoted the decomposition of H₂O₂ into ·OH, which was the main active specie for the degradation of MB. Furthermore, SDS increased the adsorption capacity of the catalyst toward MB, thus facilitating the reaction between adsorbed MB and ·OH generated on the catalyst surface.

Keywords:	nickel ferrite （NiFe₂O₄） surfactants sodium dodecyl sulfate fenton-like waste water methylene blue degradation
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