Influence of Pt and Pd Modification on the Visible Light Photocatalytic Activity of N-Doped Titania Photocatalysts

Pd and Pt modified N-doped titania nanoparticle powders were prepared by a facile sol–gel method. Nitrogen doping and metal modification were carried out simultaneously during the preparation process. The as-prepared samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy and X-ray photoelectron spectroscopy (XPS). The visible light photocatalytic activities of the asprepared samples were evaluated by analyzing their effect on the photocatalytic decomposition of methyl orange (MO). The chemical state of the metal is the key factor determining the performance of metal modified N-doped titania. The Pd used to modify the N-doped titania (Pd-NT) in our study was of the PdOx(x≤2) species, which increased the absorbance in the visible light region, decreased the recombination of photo-generated electron–hole pairs, and resulted in a significant enhancement in the visible light photocatalytic activity. The Pt species used to modify the N-doped titania (Pt-NT) was mainly in the metallic state, which resulted in a decrease in the absorbance in the visible light region, and an increase in the recombination of photo-generated electron–hole pairs. Pt modification led to a deterioration in the visible light photocatalytic activity of the material.

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Effect of Calcination Temperature on Light Absorption and Visible Light Photocatalytic Activity of N Doped TiO2 Nano-Crystalline

Science of Advanced Materials ◽

10.1166/sam.2020.3619 ◽

2020 ◽

Vol 12 (3) ◽

pp. 449-453 ◽

Cited By ~ 2

Author(s):

Bo Wang ◽

Ruiling Zhang ◽

Jin Xu ◽

Songyan Qin ◽

Jiajun Zheng ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Light Absorption ◽

Hydroxyl Groups ◽

Visible Light Region ◽

X Ray ◽

Visible Light Photocatalytic Activity ◽

Nano Crystalline ◽

Light Region ◽

Visible Light Photocatalytic

N doped TiO2 nano-crystalline was prepared through hydrolysis-precipitation process in the presence of ammonia water. The resulting materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS). It was found that N was incorporated into the lattice of TiO2 through substituting lattice oxygen atoms and coexisted in the forms of substitutional N (O–Ti–N) and interstitial N (Ti–O–N). Further, doping with N could greatly improve the phase transformation of TiO2 from rutile to anatase and light absorption in visible light region. The high visible light photocatalytic activity for the degradation of RhB of N doped TiO2 was mainly attributed to the small crystallite size, mixed phase composition, intense light absorption in visible light region, narrow band gap energy and surface hydroxyl groups.

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Visible-Light Photocatalytic Activity of N-Doped TiO2Nanotube Arrays on Acephate Degradation

Journal of Nanomaterials ◽

10.1155/2015/527070 ◽

2015 ◽

Vol 2015 ◽

pp. 1-6 ◽

Cited By ~ 6

Author(s):

Xinlei Zhang ◽

Juan Zhou ◽

Yufen Gu ◽

Ding Fan

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Nanotube Arrays ◽

Optical Absorption Edge ◽

X Ray ◽

Visible Light Photocatalytic Activity ◽

Uv Visible ◽

Anodic Oxidation Method ◽

Visible Light Photocatalytic ◽

Nitrogen Doped Titanium Dioxide

Highly ordered nitrogen-doped titanium dioxide (N-doped TiO2) nanotube arrays were prepared by anodic oxidation method and then annealed in a N2atmosphere to obtain N-doped TiO2nanotube arrays. The samples were characterized with scanning electron microscope (SEM), X-ray powder diffraction (XRD), X-ray photoelectron spectrum (XPS), and UV-visible spectrophotometry (UV-vis) spectrum. Degradation of the insecticide acephate under the visible light was used as a model to examine the visible-light photocatalytic activity of N-doped TiO2nanotube arrays. The results show that N type doping has no notable effects on the morphology and structure of TiO2nanotube arrays. After N type doping, the N replaces a small amount of O in TiO2, forming an N–Ti–O structure. This shifts the optical absorption edge and enhances absorption of the visible light. N-doped TiO2nanotube arrays subjected to annealing at 500°C in N2atmosphere show the strongest photocatalytic activity and reach a degradation rate of 84% within 2 h.

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Boron and nitrogen co-doped titania with enhanced visible-light photocatalytic activity for hydrogen evolution

Applied Surface Science ◽

10.1016/j.apsusc.2008.04.075 ◽

2008 ◽

Vol 254 (21) ◽

pp. 6831-6836 ◽

Cited By ~ 101

Author(s):

Yuexiang Li ◽

Gangfeng Ma ◽

Shaoqin Peng ◽

Gongxuan Lu ◽

Shuben Li

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Hydrogen Evolution ◽

Visible Light Photocatalytic Activity ◽

Doped Titania ◽

Co Doped ◽

Visible Light Photocatalytic

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Hierarchical mesoporous phosphorus and nitrogen doped titania materials: Synthesis, characterization and visible-light photocatalytic activity

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2009.07.024 ◽

2009 ◽

Vol 92 (1-2) ◽

pp. 61-67 ◽

Cited By ~ 72

Author(s):

Gao-Song Shao ◽

Feng-Yun Wang ◽

Tie-Zhen Ren ◽

Yuping Liu ◽

Zhong-Yong Yuan

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Materials Synthesis ◽

Nitrogen Doped ◽

Visible Light Photocatalytic Activity ◽

Doped Titania ◽

Visible Light Photocatalytic

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Carbon-doped titania nanoplates with exposed {001} facets: facile synthesis, characterization and visible-light photocatalytic performance

RSC Advances ◽

10.1039/c4ra15824e ◽

2015 ◽

Vol 5 (23) ◽

pp. 17667-17675 ◽

Cited By ~ 6

Author(s):

Jian-Wen Shi ◽

Chang Liu ◽

Chi He ◽

Jun Li ◽

Chong Xie ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Photocatalytic Performance ◽

Facile Synthesis ◽

Carbon Doped ◽

Visible Light Photocatalytic Activity ◽

Doped Titania ◽

First Time ◽

Visible Light Photocatalytic

C-doped TiO2 nanoplates (CTNP) with exposed {001} facets were synthesized for the first time. The obtained CTNP presented high visible-light photocatalytic activity. A reasonable mechanism of photocatalysis on CTNP under visible light was proposed.

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High visible-light photocatalytic activity of nitrogen-doped titania prepared from layered titania/isostearate nanocomposite

Catalysis Today ◽

10.1016/j.cattod.2006.07.047 ◽

2007 ◽

Vol 120 (2) ◽

pp. 226-232 ◽

Cited By ~ 62

Author(s):

Taki Matsumoto ◽

Nobuo Iyi ◽

Yoshiro Kaneko ◽

Kenji Kitamura ◽

Shumei Ishihara ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Nitrogen Doped ◽

Visible Light Photocatalytic Activity ◽

Doped Titania ◽

Visible Light Photocatalytic

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Enhanced Visible Light Photocatalytic Activity of Mesoporous AnataseTiO2Codoped with Nitrogen and Chlorine

International Journal of Photoenergy ◽

10.1155/2012/593245 ◽

2012 ◽

Vol 2012 ◽

pp. 1-6 ◽

Cited By ~ 9

Author(s):

Xiuwen Cheng ◽

Xiujuan Yu ◽

Zipeng Xing ◽

Lisha Yang

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Band Gap ◽

Light Absorption ◽

Photoelectron Spectroscopy ◽

Sol Gel ◽

Visible Region ◽

X Ray ◽

Visible Light Photocatalytic Activity ◽

Visible Light Photocatalytic

Anatase mesoporous titanium dioxide codoped with nitrogen and chlorine (N-Cl-TiO2) photocatalysts were synthesized through simple one-step sol-gel reactions in the presence of ammonium chloride. The resulting materials were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible diffuse reflection spectrum (UV-vis DRS). XRD results indicated that codoping with nitrogen and chlorine could effectively retard the phase transformation of TiO2from anatase to rutile and the growth of the crystallite sizes. XPS revealed that nitrogen and chlorine elements were incorporated into the lattice of TiO2through substituting the lattice oxygen atoms. DRS exhibited that the light absorption of N-Cl-TiO2in visible region was greatly improved. As a result, the band gap of TiO2was reduced to 2.12 eV. The photocatalytic activity of the as-synthesized TiO2was evaluated for the degradation of RhB and phenol under visible light irradiation. It was found that N-Cl-TiO2catalyst exhibited higher visible light photocatalytic activity than that of P25 TiO2and N-TiO2, which was attributed to the small crystallite size, intense light absorption in visible region, and narrow band gap.

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Nitrogen Doped Titania Plates with Dominant {001} Facets: The Effect of Surface Fluorination on Visible-Light Photocatalytic Activity

Proceedings of the 2015 4th International Conference on Sensors, Measurement and Intelligent Materials ◽

10.2991/icsmim-15.2016.144 ◽

2016 ◽

Author(s):

Jianwen Shi ◽

Chong Xie ◽

Guodong Li ◽

Chunming Niu

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Nitrogen Doped ◽

Visible Light Photocatalytic Activity ◽

Doped Titania ◽

Surface Fluorination ◽

Visible Light Photocatalytic ◽

Effect Of Surface

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High-Efficiency Preparation of N-Doped Titania with High Visible Light Photocatalytic Activity Using Composite N Precursor

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.645-646.368 ◽

2015 ◽

Vol 645-646 ◽

pp. 368-374

Author(s):

Yu Long Hu ◽

Xiao Dong Zhang ◽

Hong Fang Liu ◽

Xing Peng Guo

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

High Efficiency ◽

Thermo Gravimetric Analysis ◽

Ammonium Hydroxide ◽

Gravimetric Analysis ◽

X Ray ◽

Visible Light Photocatalytic Activity ◽

Photocatalytic Activities ◽

Visible Light Photocatalytic

N-doped TiO2 nanoparticle powders were prepared efficiently by the sol-gel method using triethylamine and ammonium hydroxide as composite N precursor. The as-prepared N-doped TiO2 precursor powders were calcined at 300°C in air for 3 h and subsequently annealed at 300°C in air for 2.5 h. The samples were characterized by X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, thermo-gravimetric analysis, and X-ray photoelectron spectroscopy. The visible light photocatalytic activities of as-prepared samples were evaluated by photodecomposition of methyl orange (MO). The results show that the as-prepared samples have high visible light photocatalytic activities. Triethylamine produces the N-species doped in TiO2 lattice responsible for the high visible light photocatalytic activity. Ammonium hydroxide makes the gel of the TiO2 nanoparticles nitrided by triethylamine gelate further and facilitates significantly the centrifugation of the gel. An annealing treatment can eliminate effectively the outer N species caused by ammonium hydroxide and the surface organic residues, improve effectively crystallinity, and retain the N species caused by triethylamine.

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