Tuning the Morphological Structure and Photocatalytic Activity of Nitrogen-Doped (BiO)2CO3by the Hydrothermal Temperature

Various nitrogen-doped hierarchical (BiO)2CO3nanosheets architectures were synthesized by a facile one-step template-free hydrothermal method through controlling the hydrothermal temperature (HT). The as-synthesized samples were characterized by XRD, SEM, FT-IR, XPS, and UV-vis DRS. The photocatalytic activity of the samples was evaluated towards degradation of NO at ppb level in air under visible light (VIL). It was found that HT acted as a crucial factor in determining the morphology of the samples. The rosa chinensis-like, red camellia-like, and lamina-like of nitrogen-doped (BiO)2CO3(N-BOC) micro-/nanostructures can be selectively fabricated under hydrothermal temperatures of 150, 180, and 210°C. The thickness of the nanosheets was in direct proportion to the increasing HT. Nitrogen-doping can extend the light absorption spectra of (BiO)3CO3to visible light region and enhance the VIL photocatalytic activity. Especially, the red camellia-like N-BOC-180 exhibited the highest photocatalytic performance, superior to the well-known VIL-driven photocatalyst C-doped TiO2and N-doped TiO2. The high photocatalytic performance of N-BOC was attributed to the synergetic effects of enhanced visible light absorption, multiple light-reflections between the nanosheets, and accelerated transfer of reactants and product. This research could provide new insights to the development of excellent photocatalyst with efficient performance for pollution control.

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Enhanced visible light and photocatalytic performance of TiO2 nanotubes by hydrogenation at lower temperature

RSC Advances ◽

10.1039/c5ra11616c ◽

2016 ◽

Vol 6 (8) ◽

pp. 6643-6650 ◽

Cited By ~ 22

Author(s):

Lijuan Han ◽

Zheng Ma ◽

Zhihe Luo ◽

Gang Liu ◽

Jiantai Ma ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Light Absorption ◽

Tio2 Nanotubes ◽

Photocatalytic Performance ◽

Lower Temperature

The precursor with nanotubes structure can be hydrogenated easily in lower temperature comparing with nanobelts. The light absorption and photocatalytic activity of hydrogenated TiO2 nanotubes were enhanced drastically.

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Improving the photocatalytic activity of nitrogen-doped surface defect TiO2-x nanobelts for degradation of organic pollutants

Journal of Chemical Research ◽

10.1177/1747519820938675 ◽

2020 ◽

pp. 174751982093867

Author(s):

Zhen Zhang ◽

Shao-dong Qin ◽

Jing-yun Chen ◽

Jing Li ◽

Ai-hua Xing

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Organic Pollutants ◽

Rhodamine B ◽

Light Absorption ◽

Surface Defect ◽

Separation Efficiency ◽

Visible Light Absorption ◽

Nitrogen Doped ◽

N Doping

The synthesis of surface defect TiO2-x nanobelts with excellent visible light absorption is important to reduce costs, increase stability, and improve photocatalytic activity. In this work, we report that nitrogen-doped surface defect TiO2-x nanobelts are synthesized by annealing pristine TiO2 nanobelts in Ar/H2 (95%/5%) atmosphere followed by subsequent heat treatment in NH3 at various temperatures. The aim is to study the effect of the extent of the N-doping amount in the lattice of TiO2-x nanobelts on light absorption and photocatalytic activity. Considering the increase in organic pollutants in wastewater, the photocatalytic activity is measured by degrading rhodamine B (RhB) dye in water. The results demonstrate that the calcination temperature affects the doping level of N, and the b-TiO2-N550 sample exhibits higher photocatalytic performance than that of other samples under visible-light irradiation for the degradation of rhodamine B, which is up to 96.11%. The enhancement is ascribed to the synergistic effect of N-doping and self-doping oxygen vacancy (which extend the visible light absorption) and the separation efficiency of photogenerated carriers, which improves the photocatalytic activity.

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Preparation of Fe/N Co-Doped TiO2 Powders by Mild Hydrothermal Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.804.217 ◽

2014 ◽

Vol 804 ◽

pp. 217-220 ◽

Cited By ~ 1

Author(s):

Jun Na Xu ◽

Wen Xiu Liu ◽

Peng Sun ◽

Ming Guan ◽

Wen Bin Cao

Keyword(s):

Grain Size ◽

Visible Light ◽

Hydrothermal Method ◽

Visible Light Irradiation ◽

Light Absorption ◽

Visible Light Region ◽

Light Region ◽

One Step ◽

Lower Temperature ◽

Co Doped

Yellow colored anatase Fe/N co-doped TiO2powders have been successfully synthesized by one step hydrothermal method at a lower temperature. The grain size was about 10 nm and the specific surface area of the powders ranged from 160 to 166 m2/g. The light absorption of Fe/N co-doped TiO2powders was enhanced in the visible light region of 400~500 nm and a new absorption peak at about 470 nm appeared when the Fe/Ti ratio exceeded 0.5%. The visible light photoactivity of Fe/N co-doped TiO2powders has been greatly improved than that of un-doped TiO2powders under visible light irradiation.

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The nanocomposite of polyaniline and nitrogen-doped layered HTiNbO5with excellent visible-light photocatalytic performance

Physical Chemistry Chemical Physics ◽

10.1039/c4cp01423e ◽

2014 ◽

Vol 16 (26) ◽

pp. 13409-13417 ◽

Cited By ~ 33

Author(s):

Chao Liu ◽

Liang Wu ◽

Jing Chen ◽

Ji-yuan Liang ◽

Chang-shun Li ◽

...

Keyword(s):

Methylene Blue ◽

Photocatalytic Activity ◽

Visible Light ◽

Charge Separation ◽

Photocatalytic Performance ◽

High Efficiency ◽

Nitrogen Doped ◽

Visible Light Photocatalytic Activity ◽

N Doping ◽

Visible Light Photocatalytic

N-doping and intercalation resulted in a PANI–N-HTiNbO5lamellar nanocomposite, which showed a dramatic enhanced visible-light photocatalytic activity and stability for the degradation of methylene blue (MB), due to the high efficiency of charge separation.

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Visible-Light Driven TiO2 Photocatalyst Coated with Graphene Quantum Dots of Tunable Nitrogen Doping

Molecules ◽

10.3390/molecules24020344 ◽

2019 ◽

Vol 24 (2) ◽

pp. 344 ◽

Cited By ~ 12

Author(s):

Xiong Sun ◽

Hui-Jun Li ◽

Nanquan Ou ◽

Bowen Lyu ◽

Bojie Gui ◽

...

Keyword(s):

Quantum Dots ◽

Photocatalytic Activity ◽

Visible Light ◽

Light Absorption ◽

Photocatalytic Performance ◽

Light Emission ◽

Graphene Quantum Dots ◽

Visible Light Absorption ◽

Visible Light Driven ◽

Nitrogen Doped Graphene

Nitrogen doped graphene quantum dots (NGQDs) were successfully prepared via a hydrothermal method using citric acid and urea as the carbon and nitrogen precursors, respectively. Due to different post-treatment processes, the obtained NGQDs with different surface modifications exhibited blue light emission, while their visible-light absorption was obviously different. To further understand the roles of nitrogen dopants and N-containing surface groups of NGQDs in the photocatalytic performance, their corresponding composites with TiO2 were utilized to degrade RhB solutions under visible-light irradiation. A series of characterization and photocatalytic performance tests were carried out, which demonstrated that NGQDs play a significant role in enhancing visible-light driven photocatalytic activity and the carrier separation process. The enhanced photocatalytic activity of the NGQDs/TiO2 composites can possibly be attributed to an enhanced visible light absorption ability, and an improved separation and transfer rate of photogenerated carriers.

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One step synthesis of efficient photocatalysts by TCAP doped g-C3N4 for enhanced visible-light photocatalytic activity

New Journal of Chemistry ◽

10.1039/c9nj05270d ◽

2020 ◽

Vol 44 (3) ◽

pp. 1127-1137 ◽

Cited By ~ 2

Author(s):

Hao Wu ◽

Yaoxing Huo

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Surface Area ◽

Light Absorption ◽

Defect Structure ◽

Charge Carriers ◽

Visible Light Absorption ◽

Efficient Separation ◽

One Step ◽

Visible Light Photocatalytic

CN/TCAP with enhanced visible light absorption, large surface area and defect structure allow efficient separation of charge carriers.

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Enhanced visible light absorption and photocatalytic activity of [KNbO3]1−x[BaNi0.5Nb0.5O3−δ]x synthesized by sol–gel based Pechini method

RSC Advances ◽

10.1039/c6ra15288k ◽

2016 ◽

Vol 6 (85) ◽

pp. 82409-82416 ◽

Cited By ~ 14

Author(s):

Ping Wu ◽

Guoming Wang ◽

Ruizhi Chen ◽

Yixin Guo ◽

Xueming Ma ◽

...

Keyword(s):

Photocatalytic Activity ◽

Low Temperature ◽

Visible Light ◽

Light Absorption ◽

Photocatalytic Performance ◽

Pechini Method ◽

Sol Gel ◽

Visible Light Absorption ◽

Gel Method ◽

Visible Light Photocatalytic

[KNbO3]1−x[BaNi0.5Nb0.5O3−δ]x were synthesized by Pechini sol–gel method at low temperature. Visible light photocatalytic performance of this material was evaluated.

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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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A metal-free 3C-SiC/g-C3N4 composite with enhanced visible light photocatalytic activity

RSC Advances ◽

10.1039/c7ra06497g ◽

2017 ◽

Vol 7 (63) ◽

pp. 40028-40033 ◽

Cited By ~ 10

Author(s):

Hao Xu ◽

Zhixing Gan ◽

Weiping Zhou ◽

Zuoming Ding ◽

Xiaowei Zhang

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Light Absorption ◽

Carbon Nitride ◽

Photocatalytic Performance ◽

Photogenerated Electron ◽

Electron Hole ◽

Visible Light Absorption ◽

Metal Free ◽

Visible Light Photocatalytic

Insufficient visible light absorption and fast recombination of the photogenerated electron–hole pairs have seriously hampered the photocatalytic performance of graphitic carbon nitride (g-C3N4) up to now.

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