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[目的]研究FeS2催化降解苯酚的效果。[方法]采用简易的水热法，以Fe(NO3)2·6H2O和Na2S为原料成功制备了纳米片状FeS2材料，采用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电镜(TEM)、X射线光电子能谱(XPS)、N2等温吸附/脱附等手段，对FeS2样品的组成和微观结构进行表征。以降解水体有机污染物苯酚为目标，研究了FeS2对过硫酸钠(PS)的活化效果，考察了反应条件对苯酚降解率的影响。[结果]所制FeS2具有介孔结构，比表面积高达136.7 m2/g，其中的Fe主要是以Fe2+的形式存在。它能够有效活化PS降解苯酚，降解反应的最佳条件为：FeS2质量浓度2.2 g/L,PS与苯酚的物质的量比40∶1，苯酚初始质量浓度25 mg/L，体系的pH=3.8，反应温度30°C，反应时间7.5 h。在最佳的反应条件下，苯酚的降解率高达99.5%。自由基淬灭实验结果表明，·SO4-是降解苯酚的主导氧化剂。[结论]纳米片状FeS2对苯酚的降解有良好的催化活性。
Abstract：[Objective]It is worthy to study the catalytic performance of iron disulfide (FeS2) in phenol degradation.[Method]FeS2 nanosheets were synthesized via a facile hydrothermal method using and Fe(NO3)2·6H2O and Na2S.The composition and microstructure of FeS2 were characterized by X-ray diffraction (XRD),scanning electron microscopy(SEM),transmission electron microscopy (TEM),X-ray photoelectron spectroscopy (XPS),and N2 adsorption/desorption isotherm measurement.Aiming at the degradation of phenol (a common organic contaminant) in water,the activation of sodium persulfate (PS) by FeS2 and the effects of various reaction conditions on phenol degradation efficiency were studied.[Result]FeS2 had a mesoporous structure with a specific surface area as high as 136.7 m2/g,contained predominantly Fe2+species,and effectively activated PS to degrade phenol.The phenol degradation efficiency reached up to 99.5%under the following optimized degradation conditions:FeS2 2.2 g/L,PS-to-phenol molar ratio 40:1,initial phenol concentration 25 mg/L,pH 3.8,reaction temperature 30℃,and reaction time 7.5 h.The result of free radical quenching experiment confirmed sulfate radicals as the primary oxidizing species.[Conclusion]Fe S2 nanosheets exhibits excellent catalytic activity for phenol degradation via persulfate activation.
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基本信息:
DOI：10.19289/j.1004-227x.2025.05.022
中图分类号:X703;TQ426;TB383.1
引用信息:
[1]罗小虎,戴红,吴大旺等.纳米片状FeS_2的制备及催化降解苯酚性能的研究[J].电镀与涂饰,2025,44(05):139-145.DOI:10.19289/j.1004-227x.2025.05.022.
基金信息:
贵州省材料失效与防护工程研究中心（黔教技[2022]057号）; 贵州省高等学校无机配位材料制造与新型功能化应用创新团队（黔教技[2023]090号）; 贵州省教育厅自然科学研究项目(青年科技人才成长项目)（黔教技[2024]239号）