Synthesis and characterisation of TiO 2 nanoparticles/Fe 2 O 3 waste chips composite

Micro & nano letters

article

Hassan Koohestani¹ 

[1] Faculty of Materials and Metallurgical Engineering, Semnan University

关键词: X-ray chemical analysis;    titanium compounds;    reduction (chemical);    catalysis;    oxidation;    nanoparticles;    field emission electron microscopy;    photochemistry;    X-ray diffraction;    nanofabrication;    ultraviolet spectra;    scanning electron microscopy;    visible spectra;    catalysts;    contamination;    wastewater treatment;    water contamination;    environmental issues;    industrial wastewaters;    semiconducting photocatalysts;    titanium oxide;    structural steel bar;    chemical composition;    iron oxide;    field-emission scanning electron microscope;    energy-dispersive X-ray spectroscopy;    diffusive reflectance spectra;    methyl orange degradation;    XRD spectra;    specific surface area;    TiO2 nanoparticles;    Brunauer-Emmett-Teller analyses;    waste chips composite;    electron volt energy 2.72 eV;    TiO2;    Fe2O3;   

DOI  :  10.1049/mnl.2018.5583

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Water contamination along with the environmental issues resulted by industrial wastewaters have caused a trend in applying semiconducting photocatalysts, among which TiO 2 composites have been particularly focused on to overcome the drawbacks of titanium(IV) oxide also known as titania. In the current investigation, waste chips of a structural steel bar with the chemical composition of Fe 2 O 3 were utilised to obtain the TiO 2 –Fe 2 O 3 composite. X-ray diffraction (XRD), field-emission scanning electron microscopy, energy dispersive spectroscopy, diffusive reflectance spectra, and Brunauer–Emmett–Teller analyses were made to evaluate the composition and structure of the samples. Furthermore, the photocatalytic performance of the samples was studied by methyl orange (MeO) degradation. XRD spectra proved the presence of anatase and Fe 2 O 3 phases in the sample of 10%wt. Fe 2 O 3 . The results indicate that as the Fe 2 O 3 content rises, the bandgap narrows. However, the specific surface area enlarges as this amount goes up to a certain limit (10%wt.), from which any further increase leads to a reduction in the specific surface area. The obtained results of MeO decolourisation presented the Fe 2 O 3 of 10%wt. and bandgap of 2.72 eV, and the specific surface area of 63 m 2 /g to be of the highest efficiency (96%).

【 授权许可】

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