Photocatalytic Degradation of Acidic Congo Red with Fe-Doping TiO<sub>2</sub> Nano-Powders

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Abstract Fe-doping TiO₂ photocatalyst was prepared using hydrothermal method. The samples were characterized by means of SEM, XRD and FT-IR. The photocatalytic performance of TiO₂ samples was studied using ultraviolet lamp(λ=254 nm)as illumination device and acidic Congo red as stimulant pollutant. The SEM results show that TiO₂ crystal powders are formed by TiO₂ microspheres(diameters are 2~3 μm), which are a large scale self-assembly of octahedral TiO₂ nanocrystals (each nanocrystal's length is 1.0~1.5 μm), and individual TiO₂ octahedron has triangle planes about 200 nm inside. The XRD results indicate that the as-prepared titanium dioxide is anatase crystal(i.e. A-TiO₂), that is, which has the best photocatalytic activity among TiO₂'s three kinds crystal types (anatase, rutile and brookite). The results of FT-IR show that there are a lot of -OH groups in as-prepared TiO₂ nano-particles. Photocatalytic experiment for degradation of acidic Congo red showed that Fe³⁺ doping to TiO₂ improved the photocatalytic performance of TiO₂ samples. In the doping samples, 6% (molar fraction) Fe-TiO₂ was the most active. When at the room temperature, the degradation rate of reactive acidic Congo red whose initial concentration is 60 mg/L(pH=6)could reach 82.73% by catalyst of 1.2 g/L in 10 min.

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	Articles by authors
	Zhang Yibing
	Xie Lili

Keywords： Fe³⁺-doping TiO₂； hydrothermal method； photocatalytic degeneration； acidic Congo red

Received 2017-05-04;

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Zhang Yibing, Xie Lili.Photocatalytic Degradation of Acidic Congo Red with Fe-Doping TiO₂ Nano-Powders[J] Chemcial Industry and Engineering, 2019,V36(2): 28-33

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