首页|FeS2/TiO2复合纳米材料制备及光催化性能分析

FeS2/TiO2复合纳米材料制备及光催化性能分析

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光催化技术能有效解决日益严重的水污染问题，其中心是高效光催化材料的设计与合成。以二氧化钛、升华硫粉、还原铁粉为原料，无水乙醇为过程控制剂，采用湿式机械化学合成法一步制备具有可见光响应的FeS2/TiO2复合纳米材料。通过场发射扫描电镜(FESEM-EDS)、X射线衍射(XRD)、X射线光电子能谱(XPS)对样品进行表征，研究材料复合方式、煅烧温度、催化剂用量、污染物浓度和溶液初始pH值等条件因素对体系光催化降解性能的影响规律。结果表明，机械化学合成FeS2/TiO2复合纳米材料同步实现FeS2生成、FeS2和TiO2均匀复合以及S元素掺杂进入TiO2晶格三个目标;300℃热处理的复合材料在pH值为4、催化剂投加量1 g/L和亚甲基蓝初始浓度20 mg/L时催化效果最优，在可见光下复合材料光催化降解率是单独TiO2的15倍，单独FeS2的1。8倍，有效提高了处理化工行业典型污染物的效率。异质结构筑和S元素掺杂改善了 TiO2能级结构，促进了复合体系光生电子-空穴对的有效分离和光催化利用。
Preparation and Photocatalytic Properties Analysis of FeS2/TiO2 Composite Nanomaterials
Photocatalytic technology can effectively solve the increasingly serious water pollution problem,and its center is the design and synthesis of highly efficient photocatalytic materials.With titanium dioxide,sublimed sulfur powder,reducing iron powder as the raw materials,and anhydrous ethanol as the process control agent,FeS2/TiO2 composite nanomaterials with visible light response were synthesized by wet mechanochemical method.The prepared samples were characterized by field emission scanning electron microscope(FESEM-EDS),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).The influence of composite mode,calcination temperature,catalyst dosage,pollutant concentration and initial solution pH on photocatalytic degradation performance of the system were investigated.The results showed that the FeS2 generation,uniform combination of FeS2 and TiO2,S element doped into TiO2 lattice were achieved at same time.The 300 ℃ heat-treated FeS2/TiO2 has the best catalytic performance with pH of 4,catalyst dosage of 1 g/L and MB concentration of 20 mg/L,and its photocatalytic degradation rate is 15 times that of TiO2 and 1.8 times that of FeS2.It effectively improves the efficiency of treating typical pollutants in the chemical industryHeterojunction modification and S element doping have improved the energy level structure of TiO2,promoting effective separation and photocatalytic utilization of photo-generated electron-hole pairs in the composite system.

cet mechanochemical synthesisFeS2/TiO2photocatalysiscomposite materialsmethylene blue

高原、徐昊生、史晓国、徐冉、胡玥妤、石亚喃、许崇庆

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齐鲁工业大学(山东省科学院)环境科学与工程学部,山东济南 250353

齐鲁工业大学(山东省科学院)生态研究所,山东济南 250353

湿式机械化学合成 FeS2/TiO2 光催化 复合材料 亚甲基蓝

齐鲁工业大学(山东省科学院)科教产融合试点工程基础研究类项目齐鲁工业大学(山东省科学院)科教产融合试点工程重大创新专项齐鲁工业大学省级大学生创新创业训练计划齐鲁工业大学人才科研项目

2023PX0162022JBZ02-05S2022104310292023RCKY109

2024

山东化工
山东省化工研究院 山东省化工信息中心

山东化工

影响因子：0.249
ISSN：1008-021X
年,卷(期)：2024.53(2)
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