Enhanced photocatalytic activity of Se-doped TiO2 under visible light irradiation

Xie, Wei; Li, Rui; Xu, Qingyu

doi:10.1038/s41598-018-27135-4

Cited by 217 publications

(72 citation statements)

References 44 publications

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“…However, most active photocatalyst possess large band gaps out of ideal range (TiO 2 E g = 3.2 eV; g‐C 3 N 4 E g = 2.7 eV). Accordingly, the band gap structure engineering such as doping or loading plasmonic cocatalysts, defect designing might be applied in order to enhance the light absorption. Zhang et al investigated photocatalytic activity of ultrathin layered‐double‐hydroxide nanosheet photocatalysts (M II M III ‐LDH, M II = Mg, Zn, Ni, Cu; M III = Cr, Al) for nitrogen fixation .…”

Section: Fundamental Challenges Of Photo(electro)catalytic Nitrogen Rmentioning

confidence: 99%

Photo(electro)catalytic Nitrogen Fixation: Problems and Possibilities

Sakar

Hassanzadeh-Tabrizi

et al. 2019

Adv Materials Inter

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Photo(electro)catalytic nitrogen fixation is considered as a competing alternative for the Haber–Bosch (HB) process due to the direct production of ammonia (NH3) from nitrogen and water with zero carbon dioxide emission, which has made it a very hot research topic in recent years. Particularly, photo‐driven nitrogen reduction has been attracted to a specific focus in the scientific community since it can be powered by limitless solar energy at ambient conditions. However, unsolved challenges have remained to date such as, electron–hole separation, low quantum efficiency, weak visible light harvesting, catalytic selectivity, N2 adsorption, and activation. In this Review, the recent achievements and related approaches toward nitrogen fixation are presented. In addition, the discussions on mechanistic photofixation of nitrogen, catalytic engineering design, and the outlook for enhancing the photocatalytic performance of ammonia photosynthesis are also devoted. Finally, the emerging trend of advanced photo(electro)catalysts for nitrogen fixation is proposed.

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Section: Fundamental Challenges Of Photo(electro)catalytic Nitrogen Rmentioning

confidence: 99%

Photo(electro)catalytic Nitrogen Fixation: Problems and Possibilities

Sakar

Hassanzadeh-Tabrizi

et al. 2019

Adv Materials Inter

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“…The mechanism of cation doping is essentially to tune the Fermi level and electronic structure of d-electron configuration in TiO 2 , thereby to tune the energy levels to absorb the visible light energy and to enhance the overall photocatalytic efficiency of the system as shown in Figure 4a Consequently, there have been many cations doped in TiO2 towards enhancing its PC activities. In such cation doping, TiO2 has been doped with the (i) transition metals such as Sc, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Cd, and W [73][74][75][76][77][78][79][80][81][82][83][84]; (ii) rare-earth metals such as Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er, Yb, and La [85][86][87][88][89]; and (iii) other metals such as Li, Mg, Ca, Se, Sr, Al, Sn, and Bi [90][91][92][93][94][95][96][97]. 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 TiO2 [98][99][100].…”

Section: Cationic Doping In Tiomentioning

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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“…After Se-doped with AgSbO 3 crystal molecules, the band gap and density of state are compared with the undoped crystals. As Se metalloid increased photocatalytic activity under visible light of TiO 2 , it was interesting to choose as a doping metalloid in AgSbO 3 crystal in this research [17].…”

Section: Introductionmentioning

confidence: 99%

First-principles study of structural, electronic and optical properties of AgSbO3 and AgSb0.78Se0.22O3 photocatalyst

Islam

Kumer

2020

SN Appl. Sci.

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The electronic band structures, density of state, partial density of state, optical properties, and photocatalytic activities under visible light were investigated using first principle method for AgSbO 3 crystal and Se doped. Using generalized gradient approximation based on the Perdew-Burke-Ernzerhof (PBE0), the band gap was found 0.301 eV. To recognize the character of photocatalyst activity, the optical properties were calculated. On the other hand, it was improved by using the doped of 0.22 portions Se metalloid in the crystals, its band gap was 0.16 eV whatever photocatalytic activity was increased. The second point is the optical properties as well as absorption, reflection, refractive index, conductivity, dielectric function, and loss function. After doping by Se with AgSbO 3 , the optical properties are regularly changed and increased the photocatalytic effect due to the hybridization of 4s, 3d and 4p orbitals of Se with 5s, 4d and 5p orbitals of Sb.

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Enhanced photocatalytic activity of Se-doped TiO2 under visible light irradiation

Cited by 217 publications

References 44 publications

Photo(electro)catalytic Nitrogen Fixation: Problems and Possibilities

Photo(electro)catalytic Nitrogen Fixation: Problems and Possibilities

Insights into the TiO2-Based Photocatalytic Systems and Their Mechanisms

First-principles study of structural, electronic and optical properties of AgSbO3 and AgSb0.78Se0.22O3 photocatalyst

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