Photodegradation of Rhodamine B in α-FeOOH/oxalate under light irradiation

被引：6

作者：

Chen, Rufen ^{[1
,2
]}

Zhang, Xiaonian ^{[1
]}

Liu, Hui ^{[1
]}

Song, Xiuqin ^{[1
]}

Wei, Yu ^{[1
]}

机构：

[1] Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R China

[2] Key Lab Inorgan Nanomat Hebei Prov, Shijiazhuang 050024, Peoples R China

来源：

RSC ADVANCES | 2015年 / 5卷 / 93期

基金：

中国国家自然科学基金;

关键词：

AQUEOUS DISPERSIONS; HYDROXYL RADICALS; RATE CONSTANTS; METHYL-ORANGE; OXALIC-ACID; DEGRADATION; OXIDATION; CATALYST; UVA; PHOTOCHEMISTRY;

D O I：

10.1039/c5ra13586a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

High- and low-crystalline goethite (alpha-FeOOH) were obtained via air oxidation of Fe(OH)(2). Rhodamine B (RhB) was selected as a model pollutant, and the photocatalytic activity of the alpha-FeOOH/oxalate system under light irradiation was evaluated. The crystal structure, morphology, and specific surface area of the prepared alpha-FeOOH samples were determined by X-ray diffraction (XRD), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET), respectively. The adsorption behavior of alpha-FeOOH was determined using the Langmuir model. The effects of initial pH value, initial concentration of oxalic acid, and light intensity on RhB photodegradation were investigated in the alpha-FeOOH/oxalate suspension. In contrast to high-crystalline alpha-FeOOH, low-crystalline alpha-FeOOH with a high specific surface shows higher adsorption and photocatalytic activity toward RhB photodegradation by a photo-Fenton-like reaction. A possible mechanism for RhB degradation was also suggested.

引用

页码：76548 / 76555

页数：8

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