Preparation and Photocatalytic Degradation of Fe-Doped BiOCl Photocatalytic Materials

IF 3.9 2区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Longqiang He, Xiaohua Wang* and Dapeng Hong, 
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Abstract

Fe-doped BiOCl (Fe-BiOCl) hierarchical microspheres were successfully prepared by using a simple one-step solvothermal approach. The Fe-BiOCl hierarchical microspheres were analyzed by XRD, IR, SEM, XPS, TEM, etc. The analyses confirmed that impurity levels were successfully introduced into the band gap of BiOCl through Fe doping, leading to a decrease in the band gap and an expansion of the light absorption range to the visible region. Moreover, the separation and transfer of photogenerated carriers were more effectively promoted by Fe doping, resulting in a substantially elevated photocatalytic performance of BiOCl. After 40 min of dark adsorption and 60 min of photocatalysis, the removal efficiency of the prepared Fe-BiOCl-3 for methylene blue reached 93.5%, and the degradation reaction was accorded with a first-order kinetic law. After 5 cycles of photodegradation, Fe-BiOCl-3 still maintained its high photocatalytic ability, indicating that it had a certain degree of reusability. The active species capture experiment demonstrated that O2 and OH played a predominant role during the photocatalytic degradation process. Combined with the active species capture experiment, the photocatalytic degradation mechanism of Fe-BiOCl-3 was put forward.

Abstract Image

掺铁BiOCl光催化材料的制备及其光催化降解。
采用简单的一步溶剂热法成功制备了fe掺杂BiOCl (Fe-BiOCl)级联微球。采用XRD、IR、SEM、XPS、TEM等手段对Fe-BiOCl微球进行了表征。分析证实,通过Fe掺杂成功地将杂质能级引入BiOCl的带隙中,导致带隙减小,光吸收范围扩大到可见光区。此外,Fe掺杂更有效地促进了光生载体的分离和转移,从而大大提高了BiOCl的光催化性能。经过40 min的暗吸附和60 min的光催化,制备的Fe-BiOCl-3对亚甲基蓝的去除率达到93.5%,降解反应符合一级动力学规律。经过5次光降解循环后,Fe-BiOCl-3仍保持了较高的光催化能力,说明其具有一定的可重复利用性。活性物质捕获实验表明,•O2-和•OH在光催化降解过程中起主导作用。结合活性物质捕获实验,提出了Fe-BiOCl-3光催化降解机理。
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来源期刊
Langmuir
Langmuir 化学-材料科学:综合
CiteScore
6.50
自引率
10.30%
发文量
1464
审稿时长
2.1 months
期刊介绍: Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).
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