Evaluation of the photocatalytic activity of Ln3+–TiO2 nanomaterial using fluorescence technique for real wastewater treatment

Saif, M.; Aboul-Fotouh, Sameh M.; El-Molla, Sahar A.; Ibrahim, M.M.; Ismail, L.F.M.

doi:10.1016/j.saa.2014.02.031

Cited by 24 publications

(19 citation statements)

References 49 publications

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“…Under the conditions of sufficient O and light, TiO 2 uses the photogenerated electrons and holes to degrade almost all organic pollutants in water and convert them into CO 2 , H 2 O, and other inorganic substances. Saif et al [217] prepared lanthanide (Nd 3+ , Sm 3+ , Eu 3+ , Gd 3+ , Dy 3+ , and Er 3+ )-doped TiO 2 using the sol-gel method and evaluated their photocatalytic activity in the treatment of actual sewage. In the actual sewage treatment plant application, the mineralization efficiency of Gd 3+ -TiO 2 and Eu 3+ TiO 2 on chemical oxygen demand (COD) reached 67% and 50%, respectively, after 6 h of light.…”

Section: The Application In Water Pollutionmentioning

confidence: 99%

Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review

Zhou

2020

Catalysts

167

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A high-efficiency method to deal with pollutants must be found because environmental problems are becoming more serious. Photocatalytic oxidation technology as the environmentally-friendly treatment method can completely oxidate organic pollutants into pollution-free small-molecule inorganic substances without causing secondary pollution. As a widely used photocatalyst, titanium dioxide (TiO2) can greatly improve the degradation efficiency of pollutants, but several problems are noted in its practical application. TiO2 modified by different materials has received extensive attention in the field of photocatalysis because of its excellent physical and chemical properties compared with pure TiO2. In this review, we discuss the use of different materials for TiO2 modification, highlighting recent developments in the synthesis and application of TiO2 composites using different materials. Materials discussed in the article can be divided into nonmetallic and metallic. Mechanisms of how to improve catalytic performance of TiO2 after modification are discussed, and the future development of modified TiO2 is prospected.

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Section: The Application In Water Pollutionmentioning

confidence: 99%

Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review

Zhou

2020

Catalysts

167

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“…Lanthanide effectively resides into the interstitial sites of Ln 3+ :ZnO and oxygen affinities of the lanthanide interstitially located. 33 The TEM image shows that the 0.015 mol Eu 3+ :ZnO characterized with high performed nanorod and sheet morphologies with low porosity structure (Figure 2(a)). The concentration of 0.015 mol Sm +3 :ZnO shows high porous sheet with average pore diameter 12 nm.…”

Section: Characterization Of Ln 3+ :Znomentioning

confidence: 99%

Samarium enriches antitumor activity of ZnO nanoparticles via downregulation of CXCR4 receptor and cytochrome P450

Nabeel

2020

Tumour Biol.

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Cancer is the leading cause of death and exhausts human and economic resources for treatment and protection. Zinc oxide nanoparticles play an effective role in tumor treatment but with some cautions, such as overexpression of cytochrome P450, hepatic overload, and the mammalian target of rapamycin pathway resistance. Although lanthanides have antitumor activity, their use is limited. Therefore, the current study aims to improve the effectiveness of zinc oxide nanoparticle via doping with lanthanides, such as samarium. In vitro study revealed that samarium doped with zinc oxide showed more antitumor activity than the other lanthanides, and the antitumor activity depends on the concentration of samarium in the nanocomposite. The in vivo experiment on mice bearing Ehrlich solid tumor revealed that intramuscular injection of samarium/zinc oxide downregulates the expressions of CXCR4 and PI3K/Akt/mammalian target of rapamycin pathway in respect to Ehrlich solid tumor group. Regarding the apoptotic biomarkers, samarium/zinc oxide upregulates the apoptotic biomarker; Bax accompanied with the mitotic catastrophe which was indicated by cell cycle arrest in G2 phase. Moreover, samarium:zinc oxide nanoparticles exhibited minimum toxicity which was indicated by suppressed activities of cytochrome P450 and hepatic enzymes, including alanine transaminase and aspartate transaminase. In addition, the histopathological finding, as well as immunophenotyping results, appreciated the biochemical finding. Therefore, samarium:zinc oxide might be offered a new approach to improve the effectiveness of zinc oxide nanoparticles along with lower toxic effect. Also, samarium:zinc oxide nanoparticles can be a candidate as a new antitumor compound to detect its mode of action.

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“…c o m / l o c a t e / i n o c h e photocatalysis has demonstrated good results for the degradation of pollutants in industrial wastewater, since they can increase the surface area of TiO 2 which is related directly with the improvement of the photocatalytic activity [28,29]. The presence of lanthanides in the photocatalyst can decrease the recombination rate of holes and electrons during the photocatalysis treatment by trapping photogenerated electrons, and these dopants also can increase the absorption of light in the ultraviolet region [14,30,31]. Besides, Lanthanum ions (La 3+ ) are suitable for photocatalysis because they introduce trapping sites and defects in the crystalline lattice, that in turn, reduce the electronhole recombination [30,32].…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

“…Among photocatalysts, titania (TiO 2 ) has been widely used for photocatalysis because it has good thermal stability, low cost of production and high degradation efficiencies [11,12]. In addition, it can decompose toxic agents by the generation of OH ions and O 2− [13,14]. Typically, TiO 2 can degrade the methylene blue dye almost completely; the percentage of degradation varies from 60% to 94% in a range of time from 120 min to 180 min [15][16][17].…”

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confidence: 99%

Effect of Eu 3+ concentration on the photocatalytic activity of LaSr 2 AlO 5 powders

García

Dı́az-Torres

Martín‐Romero

et al. 2015

Inorganic Chemistry Communications

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Evaluation of the photocatalytic activity of Ln3+–TiO2 nanomaterial using fluorescence technique for real wastewater treatment

Cited by 24 publications

References 49 publications

Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review

Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review

Samarium enriches antitumor activity of ZnO nanoparticles via downregulation of CXCR4 receptor and cytochrome P450

Effect of Eu 3+ concentration on the photocatalytic activity of LaSr 2 AlO 5 powders

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