AgBr/TiO2纳米纤维的制备及其光催化性能研究

摘要/Abstract

摘要： 以钛酸丁酯、聚乙烯吡咯烷酮(PVP)、无水乙醇为原料,利用静电纺丝技术制备出Ti(OC₄H₉)₄/PVP纳米纤维,经500~1 000 ℃高温煅烧制得TiO₂纳米纤维,再通过水热法将AgBr纳米颗粒负载到TiO₂纳米纤维表面。利用X射线衍射仪、场发射扫描电镜、差热-热重分析对AgBr/TiO₂纳米纤维进行表征分析。利用甲基橙(MO)为降解底物模拟染料废水,研究TiO₂、AgBr/TiO₂纳米纤维的光催化性能。分析结果表明,经800 ℃煅烧后的TiO₂纳米纤维,在添加量为100 mg时光催化效果较好;相同条件下,AgBr/TiO₂纳米纤维的光催化降解率高于TiO₂纳米纤维,AgBr/TiO₂纳米纤维对甲基橙的降解率为95.97%。

关键词: AgBr/TiO₂纳米纤维, 光催化性能, 静电纺丝法, 降解率

Abstract: AgBr/TiO₂ nanofibers were fabricated by a combination of hydrothermal and electrospinning methods. Ti(OC₄H₉)₄/PVP nanofibers were prepared by electrospinning method using Ti(OC₄H₉)₄, PVP and absolute ethanol as raw materials. TiO₂ nanofibers were obtained after calcination at 500 ℃ to 1 000 ℃. AgBr nanoparticles were immobilized on TiO₂ nanofibers under hydrothermal condition. AgBr/TiO₂ nanofibers were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and differential thermo-thermogravimetric (TG-DTA) analysis respectively. The photocatalytic property of TiO₂ and AgBr/TiO₂ nanofibers were studied using methyl orange(MO) as degradation substrate to simulate dye waste water. The results indicate that the TiO₂ nanofibers with the additive amount of 100 mg have better photocatalytic properties after calcined at 800 ℃. The photocatalytic degradation rate of AgBr/TiO₂ nanofibers is found to be higher than that of the TiO₂ nanofibers under the same conditions. The degradation rate of methyl orange by AgBr/TiO₂ nanofibers is about 96%.

Key words: AgBr/TiO₂ nanofiber, photocatalytic property, electrospinning method, degradation rate

中图分类号:

TB34
O643.36

孙楠, 陈鹏, 任有良. AgBr/TiO₂纳米纤维的制备及其光催化性能研究[J]. 人工晶体学报, 2021, 50(1): 130-137.

SUN Nan, CHEN Peng, REN Youliang. Preparation and Photocatalytic Properties of AgBr/TiO₂ Nanofibers[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(1): 130-137.

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AgBr/TiO₂纳米纤维的制备及其光催化性能研究

Preparation and Photocatalytic Properties of AgBr/TiO₂ Nanofibers

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