Photocatalytic Activity of TiO<sub>2</sub> Nanofibers with Doped La Prepared by Electrospinning Method

Ma, Yanting; Li, Shu-Dan

doi:10.1002/jccs.201400243

Cited by 21 publications

(10 citation statements)

References 22 publications

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“…In the case of rare earth elements doping, the electronic configurations such as 4f, 5d, and 6s are found to be favorable to tune the band edge positions, density of states, and width of VB and CB via altering the crystal, electronic, and optical structures in TiO 2 [98][99][100]. In addition, the rare earth elements tend to form complexes through their f -orbital and form various Lewis-based organic compounds, thereby improving the photocatalytic activities of TiO 2 [101,102]. For instance, lanthanum (La) leads to the NIR absorption in TiO 2 [103], cerium (Ce) owing to its tunable electronic configuration of 4f states, such as 4f 0 5d 0 (Ce 4+ ) and 4f 5 d 0 (Ce 3+ ), where it leads to the formation of mid-band gap in TiO 2 that facilitates the absorption of in the visible region 400-500 nm [104,105].…”

Section: Hetero-junction Tio2mentioning

confidence: 99%

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

2019

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Photocatalysis is a multifunctional phenomenon that can be employed for energy applications such as H2 production, CO2 reduction into fuels, and environmental applications such as pollutant degradations, antibacterial disinfection, etc. In this direction, it is not an exaggerated fact that TiO2 is blooming in the field of photocatalysis, which is largely explored for various photocatalytic applications. The deeper understanding of TiO2 photocatalysis has led to the design of new photocatalytic materials with multiple functionalities. Accordingly, this paper exclusively reviews the recent developments in the modification of TiO2 photocatalyst towards the understanding of its photocatalytic mechanisms. These modifications generally involve the physical and chemical changes in TiO2 such as anisotropic structuring and integration with other metal oxides, plasmonic materials, carbon-based materials, etc. Such modifications essentially lead to the changes in the energy structure of TiO2 that largely boosts up the photocatalytic process via enhancing the band structure alignments, visible light absorption, carrier separation, and transportation in the system. For instance, the ability to align the band structure in TiO2 makes it suitable for multiple photocatalytic processes such as degradation of various pollutants, H2 production, CO2 conversion, etc. For these reasons, TiO2 can be realized as a prototypical photocatalyst, which paves ways to develop new photocatalytic materials in the field. In this context, this review paper sheds light into the emerging trends in TiO2 in terms of its modifications towards multifunctional photocatalytic applications.

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Section: Hetero-junction Tio2mentioning

confidence: 99%

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

2019

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“…Furthermore, rare-earth metals can form complexes with various Lewis-based organic compounds through interaction of the functional groups with their f orbital, thereby improving the photoactivity. Last, the functional integration of upconversion luminescent rare-earth ions with photocatalyst provides a potential for wavelength conversion and efficient utilization of solar energy for this purpose [222,223]. This approach appears to be a completely new alternative for enhancing the efficiency of the photocatalytic process.…”

Section: Rare-earth Metal Dopingmentioning

confidence: 99%

Influences of Doping on Photocatalytic Properties of TiO2 Photocatalyst

Huang¹,

Yan²,

Zhao³

2016

Semiconductor Photocatalysis - Materials, Mechanisms and Applications

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As a kind of highly effective, low-cost, and stable photocatalysts, TiO 2 has received substantial public and scientific attention. However, it can only be activated under ultraviolet light irradiation due to its wide bandgap, high recombination, and weak separation efficiency of carriers. Doping is an effective method to extend the light absorption to the visible light region. In this chapter, we will address the importance of doping, different doping modes, preparation method, and photocatalytic mechanism in TiO 2 photocatalysts. Thereafter, we will concentrate on Ti 3+ self-doping, nonmetal doping, metal doping, and codoping. Examples of progress can be given for each one of these four doping modes. The influencing factors of preparation method and doping modes on photocatalytic performance (spectrum response, carrier transport, interfacial electron transfer reaction, surface active sites, etc.) are summed up. The main objective is to study the photocatalytic processes, to elucidate the mechanistic models for a better understanding the photocatalytic reactions, and to find a method of enhancing photocatalytic activities.

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“…There might be a connection between oxygen storage capacity and SCR performance, which might be beneficial to denitrification for co-firing. The doping of La in the TiO2 has been reported for the promotion of photocatalytic ability [7][8][9]. The enhanced visible light activity is primarily due to enhanced separation of light-induced carriers, low bandgap energy, strong visible light absorption, and high adsorption capacity [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Zr-La-TiO₂ Catalyst on Denitrification for Coal Combustion

Cheng

et al. 2022

J. Phys.: Conf. Ser.

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Nanocomposites of TiO2 co-doped with La and Zr were prepared using the microwave-assisted sol-gel method. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy (EDS) and specific surface area measurement (BET). The XRD results revealed that all the catalysts showed an anatase phase. It was found that the particle size of La-Zr-TiO2 is much smaller than pure TiO2. Moreover, the denitrification efficiency of La-Zr-TiO2 was 65.77%, which was higher than that of the pure and mono-doped TiO2 in the experiment.

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Photocatalytic Activity of TiO₂ Nanofibers with Doped La Prepared by Electrospinning Method

Cited by 21 publications

References 22 publications

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

Influences of Doping on Photocatalytic Properties of TiO2 Photocatalyst

Effect of Zr-La-TiO₂ Catalyst on Denitrification for Coal Combustion

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Photocatalytic Activity of TiO2 Nanofibers with Doped La Prepared by Electrospinning Method

Cited by 21 publications

References 22 publications

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

Influences of Doping on Photocatalytic Properties of TiO2 Photocatalyst

Effect of Zr-La-TiO2 Catalyst on Denitrification for Coal Combustion

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Product

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Photocatalytic Activity of TiO₂ Nanofibers with Doped La Prepared by Electrospinning Method

Effect of Zr-La-TiO₂ Catalyst on Denitrification for Coal Combustion