Amorphous carbon inhibited TiO2 phase transition in aqueous solution and its application in photocatalytic degradation of organic dye

Du, Xuanzhen; Wu, Yetong; Kou, Yumeng; Mu, Jianglong; Yang, Zhibo; Hu, Xiaoyun; Teng, Feng

doi:10.1016/j.jallcom.2019.151917

Cited by 35 publications

(7 citation statements)

References 53 publications

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“…Although the pristine sample is synthesized at 900°C, the dense-structured carbon matrix can introduce carbon doping into the Nb 2 O 5 nanoparticles, which hinders the phase transition from hexagonal to orthorhombic/monoclinic under 900°C. Such obstruction effect by the doped carbon has been revealed in the TiO 2 phase transition [38][39][40][41]. During the CO 2 activation process, the carbon matrix is etched gradually, which partially eliminates the doped carbon and facilitates phase transition.…”

Section: Resultsmentioning

confidence: 99%

Carbon-emcoating architecture boosts lithium storage of Nb2O5

Gao

et al. 2020

Sci. China Mater.

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Intercalation transition metal oxides (ITMO) have attracted great attention as lithium-ion battery negative electrodes due to high operation safety, high capacity and rapid ion intercalation. However, the intrinsic low electron conductivity plagues the lifetime and cell performance of the ITMO negative electrode. Here we design a new carbon-emcoating architecture through single CO 2 activation treatment as demonstrated by the Nb 2 O 5 /C nanohybrid. Triple structure engineering of the carbon-emcoating Nb 2 O 5 /C nanohybrid is achieved in terms of porosity, composition, and crystallographic phase. The carbon-embedding Nb 2 O 5 /C nanohybrids show superior cycling and rate performance compared with the conventional carbon coating, with reversible capacity of 387 mA h g −1 at 0.2 C and 92% of capacity retained after 500 cycles at 1 C. Differential electrochemical mass spectrometry (DEMS) indicates that the carbon emcoated Nb 2 O 5 nanohybrids present less gas evolution than commercial lithium titanate oxide during cycling. The unique carbon-emcoating technique can be universally applied to other ITMO negative electrodes to achieve high electrochemical performance.

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Section: Resultsmentioning

confidence: 99%

Carbon-emcoating architecture boosts lithium storage of Nb2O5

Gao

et al. 2020

Sci. China Mater.

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“…The TiO 6 ortho-octahedral chains share a boundary along the c-direction. The difference in Ti-O-Ti bond angles in the two crystalline phases is large, and the angular distortion is the main step in the A-R phase transition [8] .…”

Section: Xrdmentioning

confidence: 99%

Comparison of Effect of Strong Magnetic Field on Microstructure and Photo Absorption Performance of CaTiO₃ and TiO₂

2023

J. Phys.: Conf. Ser.

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The study found that after strong magnetic field treatment of CaTiO3 along with the increase of interplanar distance and lattice constant, the band gap was reduced and the photo absorption performance was improved. The higher the applied magnetic field strength, the smaller the rutile TiO2 lattice is, and the change of magnetic field on the lattice constant is nonlinear. The change before and after 6T is significant, while after the 9T treatment, the light absorption capacity in the violet region can be improved and the effect of strong magnetic field rutile lattice can be largely eliminated by simple heat treatment.

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“…Temperature of the transition can vary from 400 • C to 1200 • C, although it is mostly expected at roughly 600-750 • C. Elements, such as K, Na, Ni, Li, Fe, Zn, Cu, Cd, Mn and Cr, may act as promoters while elements, such as Ca, Si, P, S, Zr, Al, Ba, B and Ce may act as inhibitors [105][106][107][108][109]. Du et al [110] pointed out that if the structure of TiO 2 is hollow, it could be possible to avoid phase transition at temperatures below 800 • C. Also, an amorphous carbon coating can prevent transition, by hindering the access of oxygen. One of the roles of tungsten in the V 2 O 5 −WO 3 /TiO 2 catalyst is to reduce phase transition of TiO 2 at high temperature [111,112].…”

Section: Thermal Deactivationmentioning

confidence: 99%

Deactivation of V2O5−WO3/TiO2 DeNOx Catalyst under Commercial Conditions in Power Production Plant

et al. 2020

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Nitrogen dioxide is one of the most dangerous air pollutants, because its high concentration in air can be directly harmful to human health. It is also responsible for photochemical smog and acid rains. One of the most commonly used techniques to tackle this problem in large combustion plants is selective catalytic reduction (SCR). Commercial SCR installations are often equipped with a V2O5−WO3/TiO2 catalyst. In power plants which utilize a solid fuel boiler, catalysts are exposed to unfavorable conditions. In the paper, factors responsible for deactivation of such a catalyst are comprehensively reviewed where different types of deactivation mechanism, like mechanical, chemical or thermal mechanisms, are separately described. The paper presents the impact of sulfur trioxide and ammonia slip on the catalyst deactivation as well as the problem of ammonium bisulfate formation. The latter is one of the crucial factors influencing the loss of catalytic activity. The majority of issues with fast catalyst deactivation occur when the catalyst work in off-design conditions, in particular in too high or too low temperatures.

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Amorphous carbon inhibited TiO2 phase transition in aqueous solution and its application in photocatalytic degradation of organic dye

Cited by 35 publications

References 53 publications

Carbon-emcoating architecture boosts lithium storage of Nb2O5

Carbon-emcoating architecture boosts lithium storage of Nb2O5

Comparison of Effect of Strong Magnetic Field on Microstructure and Photo Absorption Performance of CaTiO₃ and TiO₂

Deactivation of V2O5−WO3/TiO2 DeNOx Catalyst under Commercial Conditions in Power Production Plant

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Amorphous carbon inhibited TiO2 phase transition in aqueous solution and its application in photocatalytic degradation of organic dye

Cited by 35 publications

References 53 publications

Carbon-emcoating architecture boosts lithium storage of Nb2O5

Carbon-emcoating architecture boosts lithium storage of Nb2O5

Comparison of Effect of Strong Magnetic Field on Microstructure and Photo Absorption Performance of CaTiO3 and TiO2

Deactivation of V2O5−WO3/TiO2 DeNOx Catalyst under Commercial Conditions in Power Production Plant

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Comparison of Effect of Strong Magnetic Field on Microstructure and Photo Absorption Performance of CaTiO₃ and TiO₂