Effect of heat treatment on crystal phase and photocatalytic activity of Tm doped TiO<sub>2</sub>nanoparticles

Zhou, Wuyi; Cao, Qiaoying; Yu, X Y; Jia, Jingyan; Xu, Ya-Jie

doi:10.1179/174367510x12677121374384

Cited by 4 publications

(3 citation statements)

References 18 publications

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“…However, for Mg alloys to be successfully applied to the orthopedic field, the corrosion rate must be reduced to prevent both early failure of the implant and the production of excessive hydrogen gas. Several techniques can be used individually or in combination to control the corrosion of Mg including alloying,7–10 coating,11–15 and the modification of production processes 16–19…”

Section: Introductionmentioning

confidence: 99%

Magnesium alloys: Predicting in vivo corrosion with in vitro immersion testing

Walker¹,

Shadanbaz²,

Kirkland³

et al. 2012

J Biomed Mater Res

207

133

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Magnesium (Mg) and its alloys have been proposed as degradable replacements to commonly used orthopedic biomaterials such as titanium alloys and stainless steel. However, the corrosion of Mg in a physiological environment remains a difficult characteristic to accurately assess with in vitro methods. The aim of this study was to identify a simple in vitro immersion test that could provide corrosion rates similar to those observed in vivo. Pure Mg and five alloys (AZ31, Mg-0.8Ca, Mg-1Zn, Mg-1Mn, Mg-1.34Ca-3Zn) were immersed in either Earle's balanced salt solution (EBSS), minimum essential medium (MEM), or MEM-containing 40 g/L bovine serum albumin (MEMp) for 7, 14, or 21 days before removal and assessment of corrosion by weight loss. This in vitro data was compared to in vivo corrosion rates of the same materials implanted in a subcutaneous environment in Lewis rats for equivalent time points. The results suggested that, for the alloys investigated, the EBSS buffered with sodium bicarbonate provides a rate of degradation comparable to those observed in vivo. In contrast, the addition of components such as (4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid) (HEPES), vitamins, amino acids, and albumin significantly increased corrosion rates. Based on these findings, it is proposed that with this in vitro protocol, immersion of Mg alloys in EBSS can be used as a predictor of in vivo corrosion.

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Section: Introductionmentioning

confidence: 99%

Magnesium alloys: Predicting in vivo corrosion with in vitro immersion testing

Walker¹,

Shadanbaz²,

Kirkland³

et al. 2012

J Biomed Mater Res

207

133

View full text Add to dashboard Cite

show abstract

“…The photocatalytic methods have most widely used to degrade and mineralise many organic wastes in water. An important advantage of the photocatalytic system is a high rate of reaction and a cost-effective method [1,6,7].…”

Section: Introductionmentioning

confidence: 99%

Characterisation of titania nanotubes supported gold particles for MTBE photocatalytic degradation

Safaei¹

2018

Advances in Applied Ceramics

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Au/TNT catalysts were prepared with different gold loadings by depositionprecipitation. The catalysts were characterised by techniques including XRD, HRTEM, AAS and N 2 adsorption analysis. Experimental results show that the value of surface areas and pore volumes increase with increasing Au amounts. The surface area and pore volume of catalyst with high gold loading (3.1 wt-%) are 325 m 2 g −1 and 1.34 cm 3 g −1 . The photocatalytic performance for degradation of MTBE markedly depends on gold concentration. The activity drop is attributed to the size growth and agglomeration of the gold nanoparticles. Photoactivity improvement is related to the number of nucleation centres and fine particles size. It can be concluded that there is a 10% improvement in efficiency for deposition of gold in the highest concentration compared to pure titanium nanotubes during the first 20 min of the reaction. So the photocatalytic degradation of MTBE occurs in a shorter time.

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“…One-dimensional nanostructures, 3,4 owing to the restrained electron motion in confined dimensions, may exhibit novel functional properties that cannot be realised in their individual bulk counterparts, and therefore, are currently the subject of intensive research. TiO 2 nanotubes, SnO 2 nanosheets, WO 3 nanorods, ZnO nanowires and MnO 2 nanobelts [5][6][7][8][9][10][11] are just a few prototypes showing a successful outcome of low dimensional nanostructures and their potential uses in electrochemistry, optics, magnetic and gas sensing fields. Nanostructures with high aspect ratio (i.e.…”

Section: Introductionmentioning

confidence: 99%

Study of CuO–SnO₂heterojunction nanostructures for enhanced CO gas sensing properties

Chen

Gan

et al. 2013

Advances in Applied Ceramics

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In this study, a facile hydrothermal method was adopted to fabricate SnO 2 and CuO-SnO 2 nanoparticles. The CuO content was chosen as 5 mol.-% (sample 1), 10 mol.-% (sample 2) and 15 mol.-% (sample 3). Microstructures and surface morphologies for all samples were characterised by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM). A systematic comparison study reveals an enhanced gas sensing performance for the CuO-SnO 2 gas sensor towards CO gas. The improved gas sensing properties are attributed to the formation of p-n junctions and the absorbed oxygen species as well as to the heterojunctions of the CuO to the SnO 2 nanoparticles which provide additional reaction rooms. The results represent an advance of heterojuction nanostructures in further enhancing the functionality of gas sensors, and this simple method could be applicable to many sensing materials.

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Effect of heat treatment on crystal phase and photocatalytic activity of Tm doped TiO₂nanoparticles

Cited by 4 publications

References 18 publications

Magnesium alloys: Predicting in vivo corrosion with in vitro immersion testing

Magnesium alloys: Predicting in vivo corrosion with in vitro immersion testing

Characterisation of titania nanotubes supported gold particles for MTBE photocatalytic degradation

Study of CuO–SnO₂heterojunction nanostructures for enhanced CO gas sensing properties

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Effect of heat treatment on crystal phase and photocatalytic activity of Tm doped TiO2nanoparticles

Cited by 4 publications

References 18 publications

Magnesium alloys: Predicting in vivo corrosion with in vitro immersion testing

Magnesium alloys: Predicting in vivo corrosion with in vitro immersion testing

Characterisation of titania nanotubes supported gold particles for MTBE photocatalytic degradation

Study of CuO–SnO2heterojunction nanostructures for enhanced CO gas sensing properties

Contact Info

Product

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Effect of heat treatment on crystal phase and photocatalytic activity of Tm doped TiO₂nanoparticles

Study of CuO–SnO₂heterojunction nanostructures for enhanced CO gas sensing properties