Self-doped TiO 2−x nanowires with enhanced photocatalytic activity: Facile synthesis and effects of the Ti 3+

Wang, Junpeng; Yang, Ping; Huang, Baibiao

doi:10.1016/j.apsusc.2015.08.029

Cited by 57 publications

(13 citation statements)

References 47 publications

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“…It shifts from 137.82 cm −1 to 140.07 cm −1 and the full width at half maximum (FWHM) increases from 8.29 to 12.65. Generally, the quantum size limitation effect (that is to say decreased crystalline size) causes red shift and broadened peak while the presence of defects cause blue shift [37,38]. This result shows the effect of defects are dominant compared to crystalline size.…”

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confidence: 92%

Effects of Particle Size on the Structure and Photocatalytic Performance by Alkali-Treated TiO2

et al. 2020

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Particle size of nanomaterials has significant impact on their photocatalyst properties. In this paper, TiO 2 nanoparticles with different crystalline sizes were prepared by adjusting the alkali-hydrothermal time (0-48 h). An annealing in N 2 atmosphere after hydrothermal treatment caused TiO 2 reduction and created defects, resulting in the visible light photocatalytic activity. The evolution of physicochemical properties along with the increase of hydrothermal time at a low alkali concentration has been revealed. Compared with other TiO 2 samples, TiO 2 -24 showed higher photocatalytic activity toward degrading Rhodamine B and Sulfadiazine under visible light. The radical trapping and ESR experiments revealed that O 2•is the main reactive specie in TiO 2 -24.Large specific surface areas and rapid transfer of photogenerated electrons are responsible for enhancing photocatalytic activity. The above findings clearly demonstrate that particle size and surface oxygen defects can be regulated by alkali-hydrothermal method. This research will deepen the understanding of particle size on the nanomaterials performance and provide new ideas for designing efficient photocatalysts.

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confidence: 92%

Effects of Particle Size on the Structure and Photocatalytic Performance by Alkali-Treated TiO2

et al. 2020

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“…In addition, coupling with small-gap semiconductors (such as CdS and ZnO) or graphene have also been tried [58][59][60][61][62][63][64][65][66][67][68][69]. Oxygen vacancies and Ti 3+ can also been shown with visible-light activity [68,[70][71][72][73][74][75][76][77][78][79][80][81][82][83]. Feng and Huang's group [71,73,[78][79][80][81][82][83] prepared several Ti 3+ self-doped TiO 2 nanomaterials with enhanced photocatalytic activities in hydrogen generation and wastewater degradation.…”

Section: Introductionmentioning

confidence: 99%

“…Oxygen vacancies and Ti 3+ can also been shown with visible-light activity [68,[70][71][72][73][74][75][76][77][78][79][80][81][82][83]. Feng and Huang's group [71,73,[78][79][80][81][82][83] prepared several Ti 3+ self-doped TiO 2 nanomaterials with enhanced photocatalytic activities in hydrogen generation and wastewater degradation. Other factors, such as phase, morphology, structure, and porosity, are also important for the photocatalytic activities [84][85][86].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, properties, and applications of black titanium dioxide nanomaterials

et al. 2017

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Dendrimer/inorganic nanomaterial composites: Tailoring preparation, properties, functions, and applications of inorganic nanomaterials with dendritic architectures SCIENCE CHINA Chemistry 54, 286 (2011); Chiral metal-containing ionic liquid: Synthesis and applications in the enantioselective cycloaddition of carbon dioxide to epoxides SCIENCE CHINA Chemistry 54, 1044 (2011); Carbon-coated manganese dioxide nanoparticles and their enhanced electrochemical properties for zinc-ion battery applications

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“…[218] reported that anion vacancy could be produced in a TiO 2 lattice when Ti 3+ was present. Excess energy levels below the CB would be induced in the presence of these anion vacancies [219] , [220] , [221] , [222] . Overlapping of these levels with CB occurs by increasing the concentration of these vacancies, resulting in a decreased bandgap of TiO 2 .…”

Section: Strategies For Photocatalytic Activity Improvementmentioning

confidence: 99%