One-step hydrothermal method to prepare nitrogen and lanthanum co-doped TiO2 nanocrystals with exposed {001} facets and study on their photocatalytic activities in visible light

Yu, Lian; Yang, Xiaofang; He, Jie; He, Yi; Wang, Dongsheng

doi:10.1016/j.jallcom.2015.03.035

Cited by 60 publications

(23 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 10% La-BFO photoanode absorbed more visible light than other photoanodes owing to the reduced band gap of 2.28 eV in comparison to the other materials. This will likely favour the photoelectrocatalytic degradation of the water pollutants [20,30,31]. Additionally, these band gaps are within the range of the previously reported studies of BFO [18,32].…”

Section: Uv-vis Diffuse Reflectance Spectroscopic Characterisation Of the Photoanodessupporting

confidence: 77%

Photoelectrochemical Degradation of Organic Pollutants on a La3+ Doped BiFeO3 Perovskite

et al. 2021

View full text Add to dashboard Cite

Towards nonconventional wastewater treatment methods for the degradation of organic pollutants in wastewater, a perovskite-based photoelectrochemical system was developed. Bismuth ferrite doped with lanthanum (La-BiFeO3, La-BFO) perovskite was synthesised through a hydrothermal method with low calcination temperature for the photoelectrochemical degradation of orange II dye and other cocktails of dyes. Photoanodes were prepared by the deposition of the perovskites on a fluorine-doped tin oxide (FTO) substrate. The photoanodes were characterised using XRD, FESEM, FTIR and UV-vis diffuse reflectance. The photoelectrochemical properties of the synthesised photoanodes were investigated with chronoamperometry and electrochemical impedance spectroscopy (including Mott–Schottky analysis). The results show that all La3+-doped BFO photoanodes exhibited a higher absorption edge in the visible light region than the undoped BFO. The photocurrent response of 10% La-BFO (the best performing electrode) exhibited a three times higher current response than the pure BFO. In addition, the electrode exhibited a good degradation efficiency of 84.2% within 120 min with applied bias potential of 2 V at a pH of 7. EIS studies showed a significant enhancement of the interfacial electron transfer of the charge carriers. The enhancements in electrode performances were attributed to the synergistic effect of the applied bias potential and the introduction of La3+ into the BFO matrix. This study therefore shows that the photoelectrocatalytic performance of BFO for water treatment can be improved by the introduction of perovskites-doping ions such as La3+.

show abstract

Section: Uv-vis Diffuse Reflectance Spectroscopic Characterisation Of the Photoanodessupporting

confidence: 77%

Photoelectrochemical Degradation of Organic Pollutants on a La3+ Doped BiFeO3 Perovskite

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Co-alloying of anion doped TiO 2 with metal ions is another effective method for improving the visible-light photocatalytic activity of TiO 2 [363][364][365][366]. The benefits of co-alloying have been validated in numerous compositions including N/Fe 3+ , N/V 5+ , N/Sn 2+ , N/Ta 2+ , N/Ni 3+ , N/Cr 3+ , N/W 5+ , N/Ce 3+ , N/La 3+ , N/Sm 3+ and C/V 5+ [367][368][369][370][371][372][373][374][375][376][377].…”

Section: Metal Non-metal Codopingmentioning

confidence: 99%

Visible-light activation of TiO2 photocatalysts: Advances in theory and experiments

Etacheri

Valentin

Schneider

et al. 2015

Journal of Photochemistry and Photobiology C: Photochemistry Re

1,171

549

View full text Add to dashboard Cite

The remarkable achievement by Fujishima and Honda (1972) in the photoelectrochemical water splitting results in the extensive use of TiO 2 nanomaterials for environmental purification and energy storage/conversion applications. Though there are many advantages for the TiO 2 compared to other semiconductor photocatalysts, its band gap of 3.2 eV restrains application to the UV-region of the electromagnetic spectrum (λ ≤ 387.5 nm). As a result, development of visible-light active titanium dioxide is one of the key challenges in the field of semiconductor photocatalysis. In this review, advances in the strategies for the visible light activation, origin of visiblelight activity, and electronic structure of various visible-light active TiO 2 photocatalysts are discussed in detail. It has also been showed that if appropriate models are used, the theoretical insights can successfully be employed to develop novel catalysts to enhance the photocatalytic performance in the visible region. Recent developments in the theory and experiments in visible-light induced water splitting, degradation of environmental pollutants, water and air purification and antibacterial applications are also reviewed. Various strategies to identify appropriate dopants for improved visible-light absorption and electron-hole separation to enhance the photocatalytic activity are discussed in detail, and a number of recommendations are also presented.

show abstract

“…Sun et al [292] and Yu et al [293] investigated the interaction between substitutional N and implanted La at the (101) and {001} facets of TiO 2 using first-principles DFT calculations and analyzed the origin of enhanced visible light photocatalytic activity of (N, La) codoped TiO 2 . They found that substitutional probability of N atom obviously decreased due to La implantation.…”

Section: N-metal Dopingmentioning

confidence: 99%

Influences of Doping on Photocatalytic Properties of TiO2 Photocatalyst

Huang¹,

Yan²,

Zhao³

2016

Semiconductor Photocatalysis - Materials, Mechanisms and Applications

View full text Add to dashboard Cite

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.

show abstract

One-step hydrothermal method to prepare nitrogen and lanthanum co-doped TiO2 nanocrystals with exposed {001} facets and study on their photocatalytic activities in visible light

Cited by 60 publications

References 45 publications

Photoelectrochemical Degradation of Organic Pollutants on a La3+ Doped BiFeO3 Perovskite

Photoelectrochemical Degradation of Organic Pollutants on a La3+ Doped BiFeO3 Perovskite

Visible-light activation of TiO2 photocatalysts: Advances in theory and experiments

Influences of Doping on Photocatalytic Properties of TiO2 Photocatalyst

Contact Info

Product

Resources

About