Influence Factors and Kinetic Study on Photocatalytic Degradation of Rhodamine B by Fe-Doped TiO2/Diatomite Composite

2012 ◽  
Vol 535-537 ◽  
pp. 2209-2213 ◽  
Author(s):  
Jun Xiong Lin ◽  
Lan Wang ◽  
Chong Sun
Keyword(s):  
Photocatalytic Degradation ◽  
Kinetic Study ◽  
Rhodamine B ◽  
Sol Gel ◽  
Influence Factors ◽  
Degradation Process ◽  
Operational Parameters ◽  
Gel Method ◽  
Doped Tio2 ◽  
Decolorization Efficiency

Supported Fe-doped TiO2 has been prepared by a sol-gel method through the use of porous diatomite. The synthesized Fe-doped TiO2/diatomite composites were characterized by SEM and EDX techniques. The composite presented in this study showed higher adsorption and photodegradation ability of Rhodamine B than TiO2/diatomite and diatomite. It was found that the decolorization efficiency were dependent on the operational parameters of pH, photocatalyst dosage and dye concentration, and about 85% of the initial 50 mg/L dye could be adsorbed and degraded in 240 min. Moreover, kinetic study indicated that the photocatalytic degradation process could be described by the Langmuir-Hinshelwood model.

Study on photocatalytic degradation of gaseous dichloromethane using pure and iron ion-doped TiO2 prepared by the sol–gel method

Chemosphere ◽  
2007 ◽  
Vol 66 (11) ◽  
pp. 2142-2151 ◽  
Author(s):  
Wen-Chi Hung ◽  
Ssu-Han Fu ◽  
Jeou-Jen Tseng ◽  
Hsin Chu ◽  
Tzu-Hsing Ko
Keyword(s):  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Iron Ion ◽  
Gel Method ◽  
Doped Tio2 ◽  
Sol Gel Method

scholarly journals Photocatalytic degradation of rhodamine B catalyzed by TiO2films on a capillary column

RSC Advances ◽  
2018 ◽  
Vol 8 (22) ◽  
pp. 11921-11929 ◽  
Author(s):  
Huaitao Yang ◽  
Junjiao Yang
Keyword(s):  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Capillary Column ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

TiO2films on a capillary column were prepared using tetrabutoxytitanium as a source of TiO2viathe sol–gel method.

Photocatalytic Degradation of NO2- by Fe3+-Doped TiO2 Nano Particles Prepared by Sol-Gel Method

2007 ◽  
Vol 544-545 ◽  
pp. 111-114 ◽  
Author(s):  
Ke Hui Qiu ◽  
Chun Mei Zhang ◽  
Jun Feng Li ◽  
Qun Li ◽  
Jie Zhao
Keyword(s):  
Electron Microscopy ◽  
Grain Size ◽  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Influence Factors ◽  
Nano Particles ◽  
Photocatalytic Decomposition ◽  
Tio2 Photocatalysts ◽  
Doped Tio2

The preparation and the photocatalytic degradation NO2 - activity of Fe3+-doped TiO2 nano-sized particles is reported in this paper. The TiO2 nano particles were prepared by sol-gel method. The various influence factors about the synthesis process of the Fe3+-doped TiO2 nano photocatalyst were controlled and investigated by XRD (X-ray diffraction), SEM (scanning electron microscopy), and TEM (transmission electron microscopy) etc.. The results show that the phase compositions, crystalline grain size, crystal structure , and photocatalytic activity of the Fe3+-doped TiO2 particles prepared by the method depend on the synthesis technology parameters such as calcination temperature, holding time, Fe3+ ions concentration etc.. The influence factors of the preparation process has been discussed. The photocatalytic decomposition of NO2 - ion into N2 and O2 using Fe3+ and Ce4+-doped TiO2 photocatalysts were investigated under UV irradiation. It was fund that Fe3+-doped TiO2 photocatalysts shows much higher photocatalytic activity than that of the Ce4+-doped TiO2 . The photocatalytic decomposition effect of NO2 - ion is related to the crystalline grain size, irradiation time, and the Fe3+ ions concentration. The Fe3+-doped TiO2 nano powders exhibited the photocatalytic degradation NO2 - activity under UV light irradiation.

Immobilization of Nano-TiO2 on Expanded Perlite for Photocatalytic Degradation of Rhodamine B

2011 ◽  
Vol 110-116 ◽  
pp. 3795-3800 ◽  
Author(s):  
Xiao Zhi Wang ◽  
Wei Wei Yong ◽  
Wei Qin Yin ◽  
Ke Feng ◽  
Rong Guo
Keyword(s):  
Catalytic Activity ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Degradation Kinetics ◽  
Irradiation Time ◽  
Sol Gel ◽  
Polluted Water ◽  
Order Kinetic ◽  
Expanded Perlite ◽  
Initial Concentration

Expanded perlite (EP) modified titanium dioxide (TiO2) with different loading times were prepared by Sol-Gel method. Photocatalytic degradation kinetics of Rhodamine B (RhB) in polluted water by the materials (EP-nanoTiO2), as well as the effects of different loading times and the initial concentration of RhB on photocatalysis rate were examined. The catalytic activity of the regenerated photocatalyst was also tested. The results showed that photocatalyst modified three times with TiO2had the highest catalytic activity. Degradation ratio of RhB by EP-nanoTiO2(modified three times) under irradiation for 6 h were 98.0%, 75.6% and 63.2% for 10 mg/L, 20 mg/L and 30 mg/L, respectively.The photocatalyst activity has little change after the five times recycling, and the degradation rate of RhB decreased less than 8%. The reaction of photocatalysis for RhB with irradiation time can be expressed as first-order kinetic mode within the initial concentration range of RhB between 10mg/L and 30 mg/L. EP-nanoTiO2photocatalyst has a higher activity and stability to degrade RhB in aqueous solution.

Study on the Influence Factors of ZnFe2O4 and TiO2 Composite Films Photoelectrocatalytic Properties

2011 ◽  
Vol 287-290 ◽  
pp. 2199-2202
Author(s):  
Gui Qin Hou ◽  
Wen Li Zhang ◽  
Shui Jing Gao ◽  
Xiao Yan Wang
Keyword(s):  
Methyl Orange ◽  
Sol Gel ◽  
Composite Films ◽  
Influence Factors ◽  
Nanocomposite Films ◽  
Gel Method ◽  
Sol Gel Method ◽  
Conductive Glass ◽  
Photocatalytic Activities ◽  
Film Layer

The ZnFe2O4 and TiO2 nanocomposite films was prepared by Sol-Gel method on conductive glass, and the influence factors of it’s photoelectrocatalytic performence such as the film layer, pole and voltage was investigated. The results indicated that: the photocatalytic effects of composite films with ZnFe2O4+ TiO2+ ZnFe2O4 was the best. The decomposing ratio of methyl orange with the photoelectrocatalysis of composite films at voltage 0.2-6V all increased unstably.At the same time, the distance from films to pole plank also had the effects on the photocatalytic activities of the films.

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