Ag-decorated K2Ta2O6 nanocomposite photocatalysts with enhanced visible-light-driven degradation activities of tetracycline (TC)

Xu, Dongbo; Liu, Kuili; Shi, Weidong; Chen, Min; Luo, Bifu; Xiao, Lisong; Gu, Wei

doi:10.1016/j.ceramint.2014.11.136

Cited by 42 publications

(4 citation statements)

References 44 publications

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“…Therefore, in order to demonstrate the possible mechanism involved in the elimination of MO1 using the nanocomposite photocatalyst, the investigation was extended in presence of several scavengers. Similarly, the sodium azide traps singlet oxygen which are generated in reaction of O 2 −• with h + (Xu et al 2015). Thus, the degradation of MO1 (5.0 mg/L; pH 6.0) in presence of these scavengers is carried out using the UV-A irradiation for 2h.…”

Section: Degradation Mechanismmentioning

confidence: 99%

Noble Metal Doped TiO2 Thin Films In The Efficient Removal of Mordant Orange-1: Insights of Degradation Process

Vanlalhmingmawia¹,

Lalhriatpuia²,

Tiwari³

et al. 2021

Preprint

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Nanocomposite Ag0(NPs)/TiO2 is synthesized in a facile template method enabling fine particles of reduced Ag evenly distributed within the titania network. The morphological studies of nanocomposite were extensively performed employing SEM/EDX (Scanning Electron Spectroscopy/Energy Dispersive X-ray), TEM (Transmission Electron Microscopy) and AFM (Atomic Force Microscopy). The newer insights in the photocatalytic elimination of Mordant Orange-1 (MO1) was obtained using the nanocomposite thin film for various parametric studies utilizing the UV-A and LED illuminations. The kinetics of degradation of MO1 was performed and the rate constant was favoured at lower concentrations of MO1. However, the elimination efficiency of MO1 was favoured with decrease in solution pH. The NPOC results inferred that fairly good extent of MO1 was mineralized using thin film catalyst for both the UV-A and LED illuminations. The minimal effect of several co-ions demonstrated applicability of thin films in the elimination of MO1 and the stability of the thin film has shown the potential applicability of thin film catalyst. Further, mechanism of photocatalytic degradation was demonstrated with the radical scavengers studies and ascertained the reaction pathways.

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Section: Degradation Mechanismmentioning

confidence: 99%

Noble Metal Doped TiO2 Thin Films In The Efficient Removal of Mordant Orange-1: Insights of Degradation Process

Vanlalhmingmawia¹,

Lalhriatpuia²,

Tiwari³

et al. 2021

Preprint

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“…[26] Potassium tantalates have been reported to exhibit high and stable photocatalytic activity in water splitting, [27] however, they have not yet been explored for photocatalytic ammonia synthesis. [28] In this study, we synthesized a variety of perovskite-and pyrochlore-structured tantalates, followed by processing with a high-temperature solid-state reduction to introduce abundant oxygen vacancies and low-valent Ta. The resulting dark tantalates exhibited narrowed band gap with exceptional visible light absorption abilities.…”

Section: Introductionmentioning

confidence: 99%

“…Both structures have high dielectric constants, high chemical stability, and a 180° Ta−O−Ta bond angle that is favorable for photoexcited charge separation [26] . Potassium tantalates have been reported to exhibit high and stable photocatalytic activity in water splitting, [27] however, they have not yet been explored for photocatalytic ammonia synthesis [28] …”

Section: Introductionmentioning

confidence: 99%

Defect Pyrochlore‐Type Mott–Schottky Photocatalysts for Enhanced Ammonia Synthesis at Low Pressure

et al. 2023

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The ambient ammonia synthesis coupled with distributed green hydrogen production technology can provide promising solutions for low-carbon NH 3 production and H 2 storage. Herein, we reported Ru-loaded defective pyrochlore K 2 Ta 2 O 6À x with remarkable visiblelight absorption and a very low work function, enabling effective visible-light-driven ammonia synthesis from N 2 and H 2 at low pressure down to 0.2 atm. The photocatalytic rate was 2.8 times higher than that of the best previously reported photocatalyst and the photo-thermal rate at 425 K was similar to that of Ru-loaded black TiO 2 at 633 K. Compared to perovskite-type KTaO 3À x with the same composition, the pyrochlore exhibited a 3.7-fold increase in intrinsic activity due to a higher photoexcited charge separation efficiency and a higher conduction band position. The interfacial Schottky barrier and spontaneous electron transfer between K 2 Ta 2 O 6À x and Ru further improve photoexcited charge separation and accumulate energetic electrons to facilitate N 2 activation.

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“…Many methods are used to improve the photocatalytic activity of K 2 Ta 2 O 6 , such as loading noble metal, metal doping, nonmetal incorporating. Xu [4] et al, prepared Ag-decorated K 2 Ta 2 O 6 nanocomposite photocatalysts, which enhanced visible light driven degradation activities of Tetracycline(TC). They found that the 3% molar ratio of Ag loading showed the highest decolorization efficiency.…”

Section: Introductionmentioning

confidence: 99%

Improving photocatalytic activity of K2Ta2O6 by Sulfur anion doping

Cao¹,

Li²,

Zhou³

et al. 2015

Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering

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Abstract. The photocatalysts of S-doped K 2 Ta 2 O 6 have been successfully synthesized by hydrothermal method. Effects of S doping to the K 2 Ta 2 O 6 on the structure and photocatalytic performance are systematically investigated. The S was successfully introduced into the lattice sites of Ta 5+ at the state of S 6+ . The morphology was unchanged when the S was incorporated into the K 2 Ta 2 O 6 . The band gap of K 2 Ta 2 O 6 was narrowed with the increase of S dopants. The photocatalytic test under UV-light irradiation indicated that the decomposing efficiency of MO and RhB was elevated with the incorporation of S. And the sample prepared from addition of 10% molar ratio of S precursor showed the highest photocatlytic performance.

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Ag-decorated K2Ta2O6 nanocomposite photocatalysts with enhanced visible-light-driven degradation activities of tetracycline (TC)

Cited by 42 publications

References 44 publications

Noble Metal Doped TiO2 Thin Films In The Efficient Removal of Mordant Orange-1: Insights of Degradation Process

Noble Metal Doped TiO2 Thin Films In The Efficient Removal of Mordant Orange-1: Insights of Degradation Process

Defect Pyrochlore‐Type Mott–Schottky Photocatalysts for Enhanced Ammonia Synthesis at Low Pressure

Improving photocatalytic activity of K2Ta2O6 by Sulfur anion doping

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