“In situ” preparation of a TiO2/Eu2O3 composite film upon Ti alloy substrate by micro-arc oxidation and its photo-catalytic property

Wang, Yongqian; Jiang, Xudong; Pan, Chunxu

doi:10.1016/j.jallcom.2012.05.083

Cited by 31 publications

(14 citation statements)

References 17 publications

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“…As the produced TiO 2 in the micro-arc oxide film has good dielectric properties and photocatalytic performances, MAO technology is also used in electronics and environment protection industries. [481,488] However, there are still some questions needed to be solved. Low processing rate and high energy cost would limit the MAO technology in manufacturing industry as the cost of MAO is still high.…”

Section: Micro-arc Oxidationmentioning

confidence: 99%

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

2020

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Thanks to a considerable number of fascinating properties, titanium (Ti) and Ti alloys play important roles in a variety of industrial sectors. However, Ti and Ti alloys could not satisfy all industrial requirements; the degradation of Ti and Ti alloys always commences on their surfaces in service, which declines the performances of Ti workpieces. Therefore, with aim to further improve their mechanical, corrosion and biological properties, surface modification is often required for Ti and Ti alloys. This article reviews the technologies and recent developments of surface-modification methods with respect to Ti and Ti alloys, including mechanical, physical, chemical, and biochemical technologies. Conventional methods have limited improvement in the properties and/or restriction on the geometry of workpieces. Therefore, many advanced surfacemodification technologies have emerged in recent decades. New methods make Ti and Ti alloys have better performance and extended applications. With requirement of high surface properties in future. Understanding the mechanism in various surface-modification methods, combining the advantages of current technologies and developing new coating materials with high performance are required urgently. As such, incorporation of different surface-modification technologies with high-performance modified layers may be the mainstream of surface modifications for Ti and Ti alloys. . His current research interests focus on the metal additive manufacturing (e.g., selective laser melting, electron beam melting), titanium alloys and composites, and processing-microstructureproperties in high-performance materials.

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Section: Micro-arc Oxidationmentioning

confidence: 99%

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

2020

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“…TiO 2 coated on three-dimensional β-SiC foam, under UV-radiation was found to photodegrade [ 43 ]. In addition to this, the formation of heterojunction has been found to effectively decrease the recombination rate of photogenerated electron–hole pairs [ 44 , 45 , 46 ]. Recently, Hojamberdiev et al demonstrated the photocatalytic activity of mesoporous SiOC/TiO 2 and SiOC/N-doped TiO 2 in which TiO 2 particles were added ex situ [ 47 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Precursor-Derived Meso-/Macroporous TiO2/SiOC Nanocomposites with Highly Stable Anatase Nanophase Providing Visible Light Photocatalytic Activity and Superior Adsorption of Organic Dyes

et al. 2018

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Titania (TiO2) is considered to have immense potential as a photocatalyst, the anatase phase in particular. There have been numerous attempts to push the limits of its catalytic activity to higher wavelengths to harness the visible electromagnetic radiation. Most of the investigations till date have been restricted to fine-tuning the bandgap by doping, control of defect chemistry at the surface and several to first principle simulations either with limited success or success at the cost of complexities in processing. Here, we report a simple and elegant way of preparing ceramics through precursor chemistry which involves synthesis of macroporous and mesoporous nanocomposites with in situ formation of TiO2 nanocrystals into a robust and protecting SiOC matrix. The in situ nanoscaled TiO2 is anatase of size 9–10 nm, which is uniformly distributed in an amorphous SiOC matrix forming a new generation of nanocomposites that combine the robustness, structural stability and durability of the SiOC matrix while achieving nanoscaled TiO2 functionalities. The stabilization of the anatase phase even at temperature as high as 1200 °C was evident. With an average pore size of 6.8 nm, surface area of 129 m2/g (BET) and pore volume of 0.22 cm3/g (BET), mesoporosity was achieved in the nanocomposites. The composites exhibited visible light photocatalytic activity, which is attributed to the Ti–O–C/TiC bonds resulting in the reduction of band gap by 0.2 to 0.9 eV. Furthermore, the heterojunction formed between the amorphous SiOC and crystalline TiO2 is also expected to minimize the recombination rate of electron-hole pair, making these novel nanocomposites based on TiO2 extremely active in visible wavelength regime.

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“…In our previous work, various TiO 2 composite lms, such as TiO 2 / YAG:Ce 3+ and TiO 2 /Eu 2 O 3 composites, have been prepared in situ by using micro-arc oxidation (MAO) technique on the titanium or titanium alloy substrate for high photocatalytic performance. 18,19 In particular, we reported a new process which combined the technique of plasma nitriding and MAO to simply prepare a high-concentration substitutional N-doped TiO 2 photocatalytic lm. 20 The principle is that the rapid oxidation process of MAO can restrict the nitrogen atoms' escape from the substrate and maximally keep the nitrogen atoms in the TiO 2 lm.…”

Section: Introductionmentioning

confidence: 99%

Preparation of high-concentration substitutional carbon-doped TiO₂ film via a two-step method for high-performance photocatalysis

Jiang

Zhang

et al. 2018

RSC Adv.

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“In situ” preparation of a TiO2/Eu2O3 composite film upon Ti alloy substrate by micro-arc oxidation and its photo-catalytic property

Cited by 31 publications

References 17 publications

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

Novel Precursor-Derived Meso-/Macroporous TiO2/SiOC Nanocomposites with Highly Stable Anatase Nanophase Providing Visible Light Photocatalytic Activity and Superior Adsorption of Organic Dyes

Preparation of high-concentration substitutional carbon-doped TiO₂ film via a two-step method for high-performance photocatalysis

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“In situ” preparation of a TiO2/Eu2O3 composite film upon Ti alloy substrate by micro-arc oxidation and its photo-catalytic property

Cited by 31 publications

References 17 publications

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

Surface Modification of Titanium and Titanium Alloys: Technologies, Developments, and Future Interests

Novel Precursor-Derived Meso-/Macroporous TiO2/SiOC Nanocomposites with Highly Stable Anatase Nanophase Providing Visible Light Photocatalytic Activity and Superior Adsorption of Organic Dyes

Preparation of high-concentration substitutional carbon-doped TiO2 film via a two-step method for high-performance photocatalysis

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Preparation of high-concentration substitutional carbon-doped TiO₂ film via a two-step method for high-performance photocatalysis