Highly photocatalytic activity of brookite/rutile TiO2 nanocrystals with semi-embedded structure

Cao, Yanfeng; Li, Xiaoting; Bian, Zhenfeng; Fuhr, Addis; Zhang, Dieqing; Zhu, Jian Hua

doi:10.1016/j.apcatb.2015.07.003

Cited by 77 publications

(41 citation statements)

References 45 publications

(44 reference statements)

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Section: Spe For Environmental Treatmentmentioning

confidence: 99%

“…However, it is reported that the activity of brookite TiO 2 can exceed anatase TiO 2 under certain condition . By regulating the ratio of TiCl 4 and t‐BuOH during the solvothermal process, Cao et al synthesized crystalline TiO 2 with different phase constitutions and morphologies, as shown in Figure f . Distinctly, the brookite/rutile TiO 2 nanocrystals with a high brookite content (72 wt%) were prepared for the first time.…”

Section: Spe For Environmental Treatmentmentioning

confidence: 99%

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Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications

Uddin

Zhang

et al. 2020

Advanced Materials

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The structure–property engineering of phase‐based materials for redox‐reactive energy conversion and environmental decontamination nanosystems, which are crucial for achieving feasible and sustainable energy and environment treatment technology, is discussed. An exhaustive overview of redox reaction processes, including electrocatalysis, photocatalysis, and photoelectrocatalysis, is given. Through examples of applications of these redox reactions, how structural phase engineering (SPE) strategies can influence the catalytic activity, selectivity, and stability is constructively reviewed and discussed. As observed, to date, much progress has been made in SPE to improve catalytic redox reactions. However, a number of highly intriguing, unresolved issues remain to be discussed, including solar photon‐to‐exciton conversion efficiency, exciton dissociation into active reductive/oxidative electrons/holes, dual‐ and multiphase junctions, selective adsorption/desorption, performance stability, sustainability, etc. To conclude, key challenges and prospects with SPE‐assisted redox reaction systems are highlighted, where further development for the advanced engineering of phase‐based materials will accelerate the sustainable (active, reliable, and scalable) production of valuable chemicals and energy, as well as facilitate environmental treatment.

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Section: Spe For Environmental Treatmentmentioning

confidence: 99%

Section: Spe For Environmental Treatmentmentioning

confidence: 99%

Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications

Uddin

Zhang

et al. 2020

Advanced Materials

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“…This is because the photocatalytic activity of TiO 2 is not only attributed to the energy‐band characteristics but also to the phase composition. Recent reports demonstrated that biphasic titania nanoparticles such as anatase–rutile, anatase–brookite, and rutile–brookite outperformed single‐phase titania nanoparticles. Recently, it was reported that anatase–rutile–brookite triphase TiO 2 was more efficient than biphase titania owing to favorable energy‐band‐edge alignment of the three phases in inhibiting recombination …”

Section: Introductionmentioning

confidence: 99%

“…[29] This is because the photocatalytic activity of TiO 2 is not only attributed to the energy-band characteristics but also to the phase composition. Recent reports demonstrated that biphasic titania nanoparticles such as anatase-rutile, [1,29] anatase-brookite, [30,31] and rutile-brookite [32,33] outperformed single-phase titania nanoparticles.R ecently,i tw as reported that anatase-rutilebrookitet riphaseT iO 2 was more efficient than biphase tita- We report the first demonstration of hydrogen-annealed triphase TiO 2 nanotubes (anatase-rutile-brookite) (T-ARB)a s av isible-light-active photocatalyst for water splitting with high quantum efficiency. As-synthesized T-ARB was annealed under hydrogen atmosphere at 250 and 450 8Cf or 2h.…”

Section: Introductionmentioning

confidence: 99%

Marginally Hydrogenated Triphasic Titania Nanotubes for Effective Visible‐Light Photocatalytic Hydrogen Generation

et al. 2017

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We report the first demonstration of hydrogen‐annealed triphase TiO2 nanotubes (anatase–rutile–brookite) (T‐ARB) as a visible‐light‐active photocatalyst for water splitting with high quantum efficiency. As‐synthesized T‐ARB was annealed under hydrogen atmosphere at 250 and 450 °C for 2 h. We found that the tubular structures were retained in the hydrogenated TiO2 samples. It was observed that the concentrations of Ti3+ and the oxygen vacancies and their distribution significantly increased with respect to the hydrogen annealing temperature. Such changes in defects were found to be critical in enhancing the photocatalytic activity of the hydrogen‐annealed triphase TiO2 nanotubes. The triphase TiO2 nanotubes hydrogen annealed at 450 °C were 16 times more efficient than pristine TiO2. Such an increase in the photocatalytic activity was explained by a triphase band diagram with defect states below the conduction band of each phase, which facilitated visible‐light activity and easy transfer of charge carriers from one phase to another. Our study showed that the well‐designed multiphase construction with oxygen vacancies enhanced the photocatalytic activity tremendously owing to the presence of a higher number of phase junctions.

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“…Surface to volume ratio of nano particles is more, and it leads to high surface energy. The TiO 2 was most widely used photocatalyst, in different industries which was easily available [2,3]. The band gap energy of TiO 2 was 3.2 eV, which has larger energy and it needs high light energy for the excitation electron between valence bond and conduction band.…”

mentioning

confidence: 99%

Solar Light Induced Degradation of Methylene Blue using Novel Co3V2O8 /TiO2 Nanocomposite

Prasad¹

2018

IJRASET

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INTRODUCTION Nowadays environmental pollution and health has become the two big serious issues for the future of world. It is necessary to avoid water pollution, which is the most important crisis for the environmental hazardous using different technology. Photo-catalysis is the very significant process by using photocatalyst, which can easily reduce the level of pollutants in aqueous system. The photocatalyst with reduced size, in nanometer scale it can effectively utilized for the photocatalyst and the litereature proved that the nanophotocatalyst shows maximum photocatalytic performance. The higher surface are of the nano material is helpful for the adsorption of pollutant and oxidized to highly stable inorganic substances, which are harmless to the living things. According to Henglein, the nanomaterial can shows effective behavior when compare to bulk material [1]. Surface to volume ratio of nano particles is more, and it leads to high surface energy. The TiO 2 was most widely used photocatalyst, in different industries which was easily available [2,3]. The band gap energy of TiO 2 was 3.2 eV, which has larger energy and it needs high light energy for the excitation electron between valence bond and conduction band. Therefore, this wide band gap energy of TiO 2 caused researcher to think more or other photocatalysts materials for the lower band gap energy. And also they tried to synthesis visible light active photocatalyst, which can able to destruct organic molecules. The researcher found large number photocatalyst for the lower band gap energy such as BiVO 4 [4,5] [25,26] and electrospinning [27]. These types of vanadates has many advantages in different fields such as electrode, supercapacitor, batteries and water oxidation processes [28][29][30][31]. Here, for the first time the composite of Co 3 V 2 O 8 /TiO 2 particle were synthesized by simple hydrothermal method. The synthesized particle was examined with different advanced instruments for the investigation of basic properties like crystalinity, morphology, particle size elemental analysis. It has been demonstrated that the synthesized composite was used for the destruction of organic pollutants present in the water. The ability of synthesized photocatalyst for the destruction of methylene blue dye, under solar light irradiation was investigated. The results show high photocatalytic efficiency for the destruction of dyes present in the water system.

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Highly photocatalytic activity of brookite/rutile TiO2 nanocrystals with semi-embedded structure

Cited by 77 publications

References 45 publications

Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications

Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications

Marginally Hydrogenated Triphasic Titania Nanotubes for Effective Visible‐Light Photocatalytic Hydrogen Generation

Solar Light Induced Degradation of Methylene Blue using Novel Co3V2O8 /TiO2 Nanocomposite

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