Preparation of homogeneous nitrogen-doped mesoporous TiO2 spheres with enhanced visible-light photocatalysis

Xiao, Li; Liu, Pengwei; Mao, Yu; Xing, Mingyang; Zhang, Jinlong

doi:10.1016/j.apcatb.2014.09.053

Cited by 145 publications

(74 citation statements)

References 31 publications

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“…One of them is the wide band-gap (3.2 eV for anatase TiO 2 ). Metals and nonmetals have been employed to tune the electronic structure of TiO 2 and a shift to higher wavelength results in increasing photocatalytic performance in visible light [16]. Another strategy for modifying of TiO 2 is that of using organic dyes that can absorb energy in visible light [17,18].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and photocatalytic activity of V-doped mesoporous TiO2 photosensitized with porphyrin supported by SBA-15

et al. 2015

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A highly efficient photocatalyst was produced by immobilizing V-doped mesoporous TiO 2 /tetrakis(4-carboxyphenyl)porphyrin (V-TiO 2 /TCPP) onto SBA-15 walls, and was then investigated for photodecomposition of 2,4-dichlorophenol (2,4-DCP) in aqueous solutions. In the present paper, first, in order to activate titanium dioxide by visible light, the TiO 2 mesoporous was doped by vanadium (V-TiO 2 ) and then it was sensitized by tetrakis(4-carboxyphenyl)porphyrin (TCPP). To improve the photocatalytic activity of the prepared catalyst, SBA-15 was functionalized with the prepared V-TiO 2 /TCPP by pre-anchorage of 3-(aminopropyl)-triethoxysilane via post-synthesis method (V-TiO 2 /TCPP/SBA). The obtained materials were characterized by UV-Vis absorption, FT-IR spectroscopy, diffuse reflectance (DRS), scanning electron microscopy, X-Ray diffraction, and N 2 adsorption-desorption. Furthermore, a comparative study on the photodegradation of 2,4-DCP between V-TiO 2 /TCPP/SBA and V-TiO 2 /TCPP composites was performed and the role of SBA-15 was investigated. The results showed that the decomposition efficiency of the 2,4-DCP by using the V-TiO 2 /TCPP/SBA was much more than that of applying TCPP/V-TiO 2 in high initial concentration of pollutant (up to 99 % in 300 mg/L). In addition, the photocatalytic degradations of 2,4-DCP using above photocatalysts all followed a first-order kinetic model. The V-TiO 2 /TCPP/SBA was recycled four times without significant loss of photocatalytic activity.

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Section: Introductionmentioning

confidence: 99%

Synthesis and photocatalytic activity of V-doped mesoporous TiO2 photosensitized with porphyrin supported by SBA-15

et al. 2015

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“…Over the past two decades, the research of mesoporous TiO 2 was mainly focused on new synthesis methods and improved photocatalytic activities [21,22,[31][32][33][34][35][36][37][38]. Some researchers explored potential applications in solar cells (anode), CO 2 capture, DNA separation, dye adsorption, and catalysis for synthesis [32,[39][40][41][42][43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

“…TiO 2 was reported to have high efficiency in ROC treatment [4]. Mesopores were reported to improve the photocatalytic activity of TiO 2 [21][22][23]. Well-known mesoporous materials include MCM-41, MCM-48, SBA-15, etc.…”

Section: Introductionmentioning

confidence: 99%

Elucidation of mesopore-organic molecules interactions in mesoporous TiO2 photocatalysts to improve photocatalytic activity

Lin

Xiang

et al. 2016

Applied Catalysis B: Environmental

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“…In addition to organic amines, ammonia has been used as a source of nitrogen to prepare N-mp-TiO 2 [60,[160][161][162][163]. Hou et al reported the preparation of nanocrystalline N-mp-TiO 2 from an alkoxide precursors and concentrated ammonia solution as a source of nitrogen [162].…”

Section: Ammoniamentioning

confidence: 99%

Synthesis and Catalytic Applications of Non-Metal Doped Mesoporous Titania

et al. 2017

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Mesoporous titania (mp-TiO 2 ) has drawn tremendous attention for a diverse set of applications due to its high surface area, interfacial structure, and tunable combination of pore size, pore orientation, wall thickness, and pore connectivity. Its pore structure facilitates rapid diffusion of reactants and charge carriers to the photocatalytically active interface of TiO 2 . However, because the large band gap of TiO 2 limits its ability to utilize visible light, non-metal doping has been extensively studied to tune the energy levels of TiO 2 . While first-principles calculations support the efficacy of this approach, it is challenging to efficiently introduce active non-metal dopants into the lattice of TiO 2 . This review surveys recent advances in the preparation of mp-TiO 2 and their doping with non-metal atoms. Different doping strategies and dopant sources are discussed. Further, co-doping with combinations of non-metal dopants are discussed as strategies to reduce the band gap, improve photogenerated charge separation, and enhance visible light absorption. The improvements resulting from each doping strategy are discussed in light of potential changes in mesoporous architecture, dopant composition and chemical state, extent of band gap reduction, and improvement in photocatalytic activities. Finally, potential applications of non-metal-doped mp-TiO 2 are explored in water splitting, CO 2 reduction, and environmental remediation with visible light.

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Preparation of homogeneous nitrogen-doped mesoporous TiO2 spheres with enhanced visible-light photocatalysis

Cited by 145 publications

References 31 publications

Synthesis and photocatalytic activity of V-doped mesoporous TiO2 photosensitized with porphyrin supported by SBA-15

Synthesis and photocatalytic activity of V-doped mesoporous TiO2 photosensitized with porphyrin supported by SBA-15

Elucidation of mesopore-organic molecules interactions in mesoporous TiO2 photocatalysts to improve photocatalytic activity

Synthesis and Catalytic Applications of Non-Metal Doped Mesoporous Titania

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