Enhanced Photocatalytic Activity of Nitrogen Doped TiO2 Anatase Nano-Particle under Simulated Sunlight Irradiation

Cheng, Xiuwen; Yu, Xin; Xing, Zipeng; Wan, Jiafeng

doi:10.1016/j.egypro.2012.01.096

Cited by 127 publications

(71 citation statements)

References 22 publications

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“…5b is the binding energy peaks for N1s of N, La co-doped TiO 2 sample at about 399.46 eV and 401.93 eV. The first peak at 399.46 eV is attributed to form the N-Ti-O bond in TiO 2 lattice, 32 which suggests that some N atoms are doped in TiO 2 lattice by substituting the oxygen atom. Another strong peak at 401.93 eV is assigned to the host in an interstitial site directly linked to lattice O and forms Ti-O-N, Ti-O-N-O.…”

Section: Resultsmentioning

confidence: 99%

N, La Co-Doped TiO₂for Use in Low-Temperature-Based Dye-Sensitized Solar Cells

Yin

Chen

Zhang

et al. 2016

J. Electrochem. Soc.

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In this survey, N, La co-doped TiO 2 nanocrystals are synthesized through simple sol-gel method. Results reveal that both elements of N and La are introduced successfully into the structure of TiO 2 and exist as the form of La (Ti-O-La) bonds, N (N-Ti-O) bonds and N (Ti-O-N) bonds by several characterization analysis, thereby resulting in the formation of new impurity energy level between the forbidden bands, and great enhancement of light absorption ability in visible light region. These resulting samples are fabricated for low-temperature-based dye-sensitized solar cells (DSSCs), and the highest temperature of the whole process is 120 • C. EIS, Bode plot and I-V analysis are employed to measure photovoltaic performance of DSSCs. The photoelectric conversion efficiency (η) of DSSCs with co-doped TiO 2 materials as the photoanode is 5.33%, and when compared to pure TiO 2 -based cell (4.02%), the η is increased by 32.6%. Dye-sensitized solar cells (DSSCs) have attracted a lot of research interest due to the low-cost, easy fabrication, good stability, and high photoelectric conversion efficiency.1 However, the traditional fabrication procedure of DSSCs requires not only the heavy FTO substrate, but also a high temperature calcination process at about 500 • C. These will limit the large area production and commercial application of DSSCs. In order to overcome these problems, flexible DSSCs with their incomparable advantages have attracted more interest of scientists, 2 compared with the traditional high temperaturebased DSSCs. By using the flexible substrate, the high temperature calcination process is not needed, which can save energy and reduce the production cost. More importantly, a wide range of flexible substrates can be applied in the fabrication of flexible DSSCs. Generally, the transparency of the solar cell substrate need to be more than 80%, and thus only FTO can be employed in the high temperature-based DSSCs. For the low temperature-based DSSCs, the substrate can involve FTO, ITO-PET (ITO-coated pol(ethylene terephthalate), ITO-PEN (ITO-coated polyethylene naphthalate), Ti foil and Ti meshes, [3][4][5] ZnO/Al thin film with high transmittance, 6 etc. It is believed that the cell based on the flexible substrate should possess the merits of being light weight, foldable and easy to carry, and thus can be used in portable electronic products. Furthermore, the cell preparation process is simple and suitable for industrial roll-to-roll mass production. It is known that the fabrication of photoanode at low temperature is essential for these flexible DSSCs. The paste employed for the generation of photoanode does not have to undergo a high temperature (about 500• C) annealing process, since no organic materials are introduced. After a slight agitation, the paste could be dried at low temperature(<150• C). Unfortunately, it is reported that the short-circuit current (J sc ) is low without the high temperature calcination process, which is the main reason for the poorer efficiency realized for the low temperatur...

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Section: Resultsmentioning

confidence: 99%

N, La Co-Doped TiO₂for Use in Low-Temperature-Based Dye-Sensitized Solar Cells

Yin

Chen

Zhang

et al. 2016

J. Electrochem. Soc.

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“…A significant peak is around 396.6 eV, and lower intensity in the 397.5 eV both the TiN [21] are attributed. Two peaks located at 395.2 eV and 396 eV assigned to the NC bonds in the TiN [22], [6], [7]. Finally, the peak located at 399.2 eV is attributed to link N-C-O in TiO 2 [23].…”

Section: Resultsmentioning

confidence: 99%

“…The nitrogen-doped TiO 2 (N-TiO 2 ) can be obtained by various methods such as sol-gel [5], visible-light-active [6], low temperature hydrothermal [7], cathodic magnetron [8], etc.…”

Section: Introductionmentioning

confidence: 99%

Sequential Processes to Produce N-TiO₂Films Through Rf Plasmas

et al. 2016

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Abstract. Using as target a CpTi disk in an atmosphere of argon/oxygen and by rf plasma. First titanium dioxide (TiO 2 ) films were obtained on silicon substrates, and subsequently, these films were doped with nitrogen (N-TiO 2 ). In both processes, along four hours at 390°C of temperature. XRay diffraction and Raman spectroscopy confirmed the presence of the nanostructured anatase phase. X-ray photoelectron spectroscopy analyzes indicate that the nitrogen atoms were incorporated into the TiO 2 film with ~33.9 at%. The films reach a thickness of 1.25 ȝm and 40 nm the average uniformity determined by using an atomic force microscope. Finally, UVVis diffuse reflectance spectroscopy outcome evaluated ones an energy band gap reduction from 3.17 eV to 2.95 eV corresponding to TiO 2 films and N-TiO 2 films respectively.

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“…The doping can be attained through impregnation via sol‐gel, co‐precipitation, and amalgamation of powders through mechanical mixing, chemical vapour deposition, cation exchange, and so on . Those dopants can increase photocatalytic efficiency and act as suppressors for the recombination of the photo‐induced electron‐hole pairs . Among different dopants, Fe 3+ is frequently employed due to its unique half‐filled electron configuration, which narrows the energy gap and may also diminish the recombination of electrons and holes by capturing photo‐generated carriers .…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Synthesis of p‐Anisaldehyde in a Mini Slurry‐Bubble Reactor under Solar Light Irradiation

et al. 2019

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Dense photocatalyst slurry was employed for the synthesis of p‐anisaldehyde under solar light irradiation. An Fe‐modified rutile TiO 2 (Fe‐TiO 2, 34.5 m 2/g) photocatalyst was used as a visible‐light‐responsive photocatalyst. A conventional TiO 2 (P25, 35 m 2/g) photocatalyst was also examined as a reference catalyst. XRD patterns and diffuse reflectance spectra showed that Fe‐TiO 2 consists of 100 % rutile phase and absorbs more visible light compared to P25, respectively. The catalyst powder was suspended in an ethyl acetate solution of p‐methoxytoluene in the mini‐reactor, with oxygen bubbling, under a solar simulator, visible light, and UV LEDs. p‐anisaldehyde, as a reaction product, was analyzed by sampling using gas‐chromatograph. Regardless of the light source, Fe‐TiO 2 always outperformed P25 in terms of both generation rates (GR) of p‐anisaldehyde and energy requirements (ER). It was demonstrated that the highly dense Fe‐TiO 2 slurry was efficient for the synthesis under solar light owing to the small size of the reactor. The small amount of Pt and ZrO 2 cocatalysts significantly enhanced the GR under solar light. By adopting a visible light responsive Fe‐TiO 2 photocatalyst, the mini slurry‐bubble reactor under solar light achieved a high GR per catalyst mass (CM), which is one to two orders higher than that reported by most previous studies with high‐power lamps.

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Enhanced Photocatalytic Activity of Nitrogen Doped TiO2 Anatase Nano-Particle under Simulated Sunlight Irradiation

Cited by 127 publications

References 22 publications

N, La Co-Doped TiO₂for Use in Low-Temperature-Based Dye-Sensitized Solar Cells

N, La Co-Doped TiO₂for Use in Low-Temperature-Based Dye-Sensitized Solar Cells

Sequential Processes to Produce N-TiO₂Films Through Rf Plasmas

Photocatalytic Synthesis of p‐Anisaldehyde in a Mini Slurry‐Bubble Reactor under Solar Light Irradiation

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Enhanced Photocatalytic Activity of Nitrogen Doped TiO2 Anatase Nano-Particle under Simulated Sunlight Irradiation

Cited by 127 publications

References 22 publications

N, La Co-Doped TiO2for Use in Low-Temperature-Based Dye-Sensitized Solar Cells

N, La Co-Doped TiO2for Use in Low-Temperature-Based Dye-Sensitized Solar Cells

Sequential Processes to Produce N-TiO2Films Through Rf Plasmas

Photocatalytic Synthesis of p‐Anisaldehyde in a Mini Slurry‐Bubble Reactor under Solar Light Irradiation

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N, La Co-Doped TiO₂for Use in Low-Temperature-Based Dye-Sensitized Solar Cells

N, La Co-Doped TiO₂for Use in Low-Temperature-Based Dye-Sensitized Solar Cells

Sequential Processes to Produce N-TiO₂Films Through Rf Plasmas