Optical studies of cobalt implanted rutile TiO2 (110) surfaces

Joshi, Shalik Ram; Padmanabhan, B.; Chanda, Anupama; Mishra, Indrani; Malik, V. K.; Mishra, N. C.; Kanjilal, D.; Varma, Shikha

doi:10.1016/j.apsusc.2016.07.038

Cited by 12 publications

(5 citation statements)

References 59 publications

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“…The transition metal-oxides are of tremendous importance owing to their outstanding material properties and cost effectiveness. [1][2][3][4] These materials also exhibit remarkable opto-electronic properties and have found wide applications in photo-catalysis, [5][6][7][8][9][10][11] photovoltaics, [12][13][14] magnetic, [15][16][17] biomaterial, [18,19] and water splitting. [2,3,20,21] The photo-induced decomposition of water on titanium dioxide (TiO 2 ) electrodes, termed as Honda-Fujishima effect, [22] suggests the strong oxidative and reductive nature of TiO 2 and has been considered to be the benchmark material for photo-anodic applications.…”

Section: Introductionmentioning

confidence: 99%

Ion‐Implantation in Titania‐Based Plasmonic Photo‐anodes: A Review

Vemula

Raavi

2022

Adv Materials Inter

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The metal‐oxide semiconductors exhibit remarkable optoelectronic properties and have immense implication in applications involving energy conversion, light emission, environmental remediation, etc. The presence of metal nanostructures in titanium dioxide (TiO2), zinc oxide metal‐oxide semiconductors have enhanced the photo‐activity, due to the plasmon resonances and are predominantly researched for organic and perovskite photovoltaics. Generally, the metal nanoparticle dopants are introduced by methods like sputtering, sol–gel, etc. However, compared with conventional doping methods, ion‐implantation technique is a purely physical process, and a high controllability and repeatability can be achieved. Here, the current status of synthesis of nanocomposites in TiO2‐based photo‐anodic applications by ion‐implantation method is reviewed, and there is no elaborate review on this topic. Finally, the future prospects of ion‐implantation technique for controlling the excitonic behavior in TiO2 are discussed.

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Section: Introductionmentioning

confidence: 99%

Ion‐Implantation in Titania‐Based Plasmonic Photo‐anodes: A Review

Vemula

Raavi

2022

Adv Materials Inter

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“…The experimental results showed that at the doping concentration of 2 at% Fe, the degradation efficiency of the doping system for the degradation of Congo red dye under sunlight was significantly higher than that of undoped rutile TiO 2 . Fukumura et al [10] used laser molecular beam epitaxy to study the effect of Co doping on the magnetic properties of rutile TiO 2 . The experimental results showed the high-temperature magnetism of Co-doped rutile TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

First principles of Fe/Co/Ni doping and the coexistence of O vacancy in the magnetic and optical properties of rutile TiO₂(110) surface

Zhen-Duo¹,

Hou²,

Qi³

et al. 2022

Phys. Scr.

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The research on the photocatalytic properties of TiO2 by doping transition metals (Fe/Co/Ni) has achieved certain progress. However, the effects of Fe/Co/Ni doping and the coexistence of O vacancies on the photocatalytic properties of TiO2 have been rarely reported. Oxygen vacancies are the most common point defects in TiO2 materials, and the precise control of O vacancies in experiments presents difficulty. To solve this problem, this study used first principles under the framework of density functional theory to investigate the effects of Fe/Co/Ni doping and the coexistence of O vacancies on the magnetic and optical properties of rutile TiO2(110) surface. The findings indicated that the formation energy of the (110) surface of rutile TiO2 doped with transition metals Fe, Co, and Ni and coexisting with O vacancies was smaller under Ti-rich conditions than under O-rich conditions. Under Ti-rich conditions, the doping system easily formed and exhibited a high stability. The findings on magnetic properties indicated that the Fe/VO-TiO2, Co/VO-TiO2, and Ni/VO-TiO2 systems all exhibited magnetism on the (110) surface. The Fe/VO-TiO2(110) surface had the largest magnetic moment and the best magnetic properties. The study of optical properties showed that the Fe/VO-TiO2(110) surface had the longest carrier lifetime, strongest surface activity, and most evident red shift in the absorption spectrum. The oxidation capability of the Fe/VO-TiO2(110) surface was relatively the best. Fe doping and the coexistence of O vacancies are the most beneficial to the photocatalysts for the production of O2 by dissociation of water on the surface of rutile TiO2(110).

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“…Titanyum dioksit (TiO2) kristalleri sıradışı kimyasal, elektronik ve optik özelliklere sahip olmaları nedeniyle gelecek vaat eden oksit yarı iletkenler arasında yer almaktadır [1-3]. Bu özelliklerinden dolayı foto-kataliz [4,5], güneş pilleri [6], foto-voltaik [7], gaz sensörleri [2,7], suyun fotoelektrolizi [8], memristör [9] vb. birçok teknolojik uygulamalarda yıllardır yaygın olarak kullanılmaktadır.…”

Section: Introductionunclassified

“…İyon aşılama yöntemi, ince film veya bulk formundaki malzemelerin katkılandırılmasında kullanılan en önemli tekniklerden biridir [2,7,[17][18][19][20]. Manyetik geçiş metal iyonları (Fe +3 , Co +2 , Mn +4 , Cr +3 , Cu +2 vb.)…”

Section: Introductionunclassified

Fe+ İyonu Aşılanmış TiO2 Tek Kristallerin Manyetik Özelliklerinin İncelenmesi

Karataş

2020

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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ÖzBu çalışmada, oda sıcaklığında demir (Fe + ) iyonları ile aşılanmış (100) ve (001) kristal yönelimine sahip tek kristal ve polikristal TiO2 alttaşların manyetik özellikleri sunulmaktadır. İyon aşılama sonrasında ısıl işleme tabi tutulan ve tutulmayan örneklerin mıknatıslanma, g-faktörü ve kristal manyetik anizotropileri Elektron Manyetik Rezonans (EMR) ve Titreşimli Örnek Manyetometre (VSM) teknikleri kullanılarak incelenmiştir. Deneysel veriler teorik bir modele dayandırılarak özel bir bilgisayar programı ile fit edilmiştir. Elde edilen sonuçlar, aşılanmış örneklerin ferromanyetik bir davranış sergilediklerini ve manyetik özelliklerinin örneğin kristal yönelimine oldukça bağlı olduğunu göstermiştir. AbstractIn this study, magnetic properties of single crystal and polycrystalline TiO2 substrates with crystal orientation (100) and (001) implanted with iron (Fe + ) ions at room temperature are presented. After implantation magnetization, gfactor and crystal magnetic anisotropy of the annealed and non-annealed samples were investigated by Electron Magnetic Resonance (EMR) and Vibrating Sample Magnetometer (VSM) techniques. Experimental data were fit with a special computer program based on the theoretical model. The results obtained show that the implanted samples exhibit a ferromagnetic behavior and their magnetic properties are highly dependent on the crystal orientation of the sample.

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Optical studies of cobalt implanted rutile TiO2 (110) surfaces

Cited by 12 publications

References 59 publications

Ion‐Implantation in Titania‐Based Plasmonic Photo‐anodes: A Review

Ion‐Implantation in Titania‐Based Plasmonic Photo‐anodes: A Review

First principles of Fe/Co/Ni doping and the coexistence of O vacancy in the magnetic and optical properties of rutile TiO₂(110) surface

Fe+ İyonu Aşılanmış TiO2 Tek Kristallerin Manyetik Özelliklerinin İncelenmesi

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Optical studies of cobalt implanted rutile TiO2 (110) surfaces

Cited by 12 publications

References 59 publications

Ion‐Implantation in Titania‐Based Plasmonic Photo‐anodes: A Review

Ion‐Implantation in Titania‐Based Plasmonic Photo‐anodes: A Review

First principles of Fe/Co/Ni doping and the coexistence of O vacancy in the magnetic and optical properties of rutile TiO2(110) surface

Fe+ İyonu Aşılanmış TiO2 Tek Kristallerin Manyetik Özelliklerinin İncelenmesi

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First principles of Fe/Co/Ni doping and the coexistence of O vacancy in the magnetic and optical properties of rutile TiO₂(110) surface