The effect of erbium on the adsorption and photodegradation of orange I in aqueous Er3+-TiO2 suspension

Chen, Liang; Hou, Meifang; Zhou, Shungui; Li, Fangbai; Liu, Chengshuai; Gao, Yangchun; Wang, Xugang; Lü, Jing

doi:10.1016/j.jhazmat.2006.05.066

Cited by 78 publications

(20 citation statements)

References 32 publications

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“…It was also reported that increasing the percentage of cerium in Ce-doped TiO 2 photocatalysts above 0.4 % resulted in a significantly photocatalytic activity significantly (Fan et al 2006). Doping with Ln(III) ions such as Er 3+ has been found to not only inhibit the anatase-to-rutile phase transformation but also decreased the particles size and increased the surface area, resulting in an enhanced photocatalytic activity (Liang et al 2006). Ln(III)-TiO 2 (Ln = Tb, Eu, Sm) nanomaterial composites prepared by sol-gel process have been reported to possess extended visible light photo-response, and the experimental results have shown that all Ln(III)-TiO 2 photocatalysts achieved higher rates of textile dye (Remazol Red (RR)) degradation as compared with pure TiO 2 (Saif and Abdel-Mottaleb 2007).…”

Section: Earlier Research On Ln(iii)-doped Tiomentioning

confidence: 98%

A mini-review on rare earth metal-doped TiO2 for photocatalytic remediation of wastewater

Saqib

Adnan

Shah

2016

Environ Sci Pollut Res

128

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Titanium dioxide (TiO2) has been considered a useful material for the treatment of wastewater due to its non-toxic character, chemical stability and excellent electrical and optical properties which contribute in its wide range of applications, particularly in environmental remediation technology. However, the wide band gap of TiO2 photocatalyst (anatase phase, 3.20 eV) limits its photocatalytic activity to the ultraviolet region of light. Besides that, the electron-hole pair recombination has been found to reduce the efficiency of the photocatalyst. To overcome these problems, tailoring of TiO2 surface with rare earth metals to improve its surface, optical and photocatalytic properties has been investigated by many researchers. The surface modifications with rare earth metals proved to enhance the efficiency of TiO2 photocatalyts by way of reducing the band gap by shifting the working wavelength to the visible region and inhibiting the anatase-to-rutile phase transformations. This review paper summarises the attempts on modification of TiO2 using rare earth metals describing their effect on the photocatalytic activities of the modified TiO2 photocatalyst.

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Section: Earlier Research On Ln(iii)-doped Tiomentioning

confidence: 98%

A mini-review on rare earth metal-doped TiO2 for photocatalytic remediation of wastewater

Saqib

Adnan

Shah

2016

Environ Sci Pollut Res

128

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“…It also showed that the crystalline size increased with the increase of calcined temperature, and the phenomenon in un-doped TiO 2 was more visible than that in holmium-doped TiO 2 , which implied that holmium doping inhibited the growth of crystalline size. Smaller crystallite size would contribute to larger surface areas [27]. The surface area increases from 0.5873 m 2 /g of T800 to 38.42 m 2 /g of T600 is due to the decrease of crystalline size from 101.8 to 51.9 nm.…”

Section: Xrd and Bet Analysesmentioning

confidence: 98%

Preparation, characterization and photocatalytic activities of holmium-doped titanium dioxide nanoparticles

Shi

Zheng

2009

Journal of Hazardous Materials

135

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“…Thus, transitions of 4f electrons of Er 3+ /Pr 3+ , enhanced adsorption, and red shift of the absorption edge, together with inhibition of the increase in TiO 2 crystallite size, justifies the dopant selection. 37,38 Furthermore, codoping is also an effective approach to improve the photocatalytic activity of the catalyst, in particular due to the synergetic action of the codoping species. 39,40 To our best knowledge, there are no photocatalytic nanocomposites produced with PVDF-TrFE and TiO 2 -doped (Er) or -codoped (Er/Pr) nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Improving Photocatalytic Performance and Recyclability by Development of Er-Doped and Er/Pr-Codoped TiO₂/Poly(vinylidene difluoride)–Trifluoroethylene Composite Membranes

Martins¹,

Gómez

Lopes³

et al. 2014

J. Phys. Chem. C

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Photocatalysis has become an attractive process to remove contaminants from aquatic environments, with TiO 2 being the most widely used photocatalyst. In spite of the advantages of the process, two main problems still have to be overcome: reutilization/recycling of TiO 2 nanoparticles, which is a time-consuming and expensive process, and the fast recombination rate of the electron−hole pairs. This work reports on the photocatalytic activity of rare earth metal doped (erbium, Er) and codoped (erbium and praseodymium, Er/Pr) TiO 2 nanoparticles immobilized in a poly(vinylidene difluoride)−trifluoroethylene (PVDF−TrFE) copolymer membrane as a suitable strategy to overcome the aforementioned limitations. It is shown that doped and codoped nanoparticles were successfully immobilized into the PVDF−TrFE membranes, with a controllable degree of porosity. A high surface area (273 m 2 /g) was attained for these nanoparticles. The low band gap (2.63 eV) of these TiO 2 -modified nanoparticles, coupled with a highly porous structure (∼75%) of the membrane microstructure, synergistically envisages the best photocatalytic performance by degrading 98% of a solution of methylene blue after 100 min of exposure to UV.

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The effect of erbium on the adsorption and photodegradation of orange I in aqueous Er3+-TiO2 suspension

Cited by 78 publications

References 32 publications

A mini-review on rare earth metal-doped TiO2 for photocatalytic remediation of wastewater

A mini-review on rare earth metal-doped TiO2 for photocatalytic remediation of wastewater

Preparation, characterization and photocatalytic activities of holmium-doped titanium dioxide nanoparticles

Improving Photocatalytic Performance and Recyclability by Development of Er-Doped and Er/Pr-Codoped TiO₂/Poly(vinylidene difluoride)–Trifluoroethylene Composite Membranes

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The effect of erbium on the adsorption and photodegradation of orange I in aqueous Er3+-TiO2 suspension

Cited by 78 publications

References 32 publications

A mini-review on rare earth metal-doped TiO2 for photocatalytic remediation of wastewater

A mini-review on rare earth metal-doped TiO2 for photocatalytic remediation of wastewater

Preparation, characterization and photocatalytic activities of holmium-doped titanium dioxide nanoparticles

Improving Photocatalytic Performance and Recyclability by Development of Er-Doped and Er/Pr-Codoped TiO2/Poly(vinylidene difluoride)–Trifluoroethylene Composite Membranes

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About

Improving Photocatalytic Performance and Recyclability by Development of Er-Doped and Er/Pr-Codoped TiO₂/Poly(vinylidene difluoride)–Trifluoroethylene Composite Membranes