Highly efficient photocatalysis toward tetracycline under simulated solar-light by Ag+-CDs-Bi2WO6: Synergistic effects of silver ions and carbon dots

Li, Zhuo; Zhu, Lingyan; Wu, Wei; Wang, Shanfeng; Qiang, Liwen

doi:10.1016/j.apcatb.2016.03.045

Cited by 80 publications

(16 citation statements)

References 72 publications

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“…Compared with the visible-light removal rate of TC, the value of TC is slightly increased to 8.8% after 100 min irradiation, further confirming that TC itself is very hard to be degraded even under simulated solar light irradiation. [24,33] The removal rates of TC for HT and HTA photocatalysts are further increased to 86% and 95.2% under the same photocatalytic conditions, respectively. Excitedly, the HTAT photocatalyst can exhibit 99.9% TC removal efficiency, indicating that TC has been completely degraded under simulated solar light irradiation.…”

Section: Photocatalytic Degradation Of Tc Under Simulated Solar Lightmentioning

confidence: 96%

Silver nanoparticles confined in shell-in-shell hollow TiO2 manifesting efficiently photocatalytic activity and stability

Zhao

Chen

Liu

et al. 2019

Chemical Engineering Journal

149

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The complete degradation of tetracycline still is a challenge for TiO2-based photocatalysts under simulated solar light irradiation. To tackle this challenge, we devise Ag nanoparticles (Ag NPs) confined in shell-in-shell hollow TiO2 photocatalyst (HTAT). This strategy mainly involves the construction of CPS@TiO2 core-shell composites, the form of TiO2 inner shell, AgNPs loading by photo-deposition, the assembly of TiO2 outer shell, and phase transition of anatase TiO2 by calcination at 450℃. All characterizations including TEM, STEM Mapping, BET, and XPS confirm the unique structure of the as-synthesized HTAT photocatalyst. As expected, the complete degradation of tetracycline (TC and TCH) can be realized by using HTAT photocatalyst under simulated solar light irradiation because its TiO2 two shells simultaneously take part in the photodegrading reaction of TC or TCH. The transformation intermediates and degradation pathway were analyzed by LC/MS. Our work effectively overcomes the disadvantages of many previously reported TiO2-based photocatalysts for the incomplete degradation of tetracycline.

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Section: Photocatalytic Degradation Of Tc Under Simulated Solar Lightmentioning

confidence: 96%

Silver nanoparticles confined in shell-in-shell hollow TiO2 manifesting efficiently photocatalytic activity and stability

Zhao

Chen

Liu

et al. 2019

Chemical Engineering Journal

149

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“…The basis of these applications is the capacity of CD and their nanocomposites to produce reactive oxygen species (ROS) and to therefore increase the photodegradation rate. Recently, such a capacity has been explored for the removal of pollutants from water [26][27][28][29][30], but this is still a field of wide opportunities for research.…”

Section: Introductionmentioning

confidence: 99%

“…Several methodologies have been proposed for the synthesis of CD, which may be divided into "top-down" and "bottom-up" methods, the latter being simpler and more economic [31]. Among the "bottom-up" methods, microwave radiation [32], chemical or thermal oxidation [33], and/or alkali-assisted ultrasonic synthesis [29], using carbon containing molecules (such as glucose, fructose, ascorbic acid) as carbon-based precursors for the preparation of CD, can be highlighted. As for hybrids, a great effort has recently been made on the preparation of novel materials comprised of CD and inorganic nanoparticle cores.…”

Section: Introductionmentioning

confidence: 99%

Photodegradation of Aquaculture Antibiotics Using Carbon Dots-TiO2 Nanocomposites

Louros

Ferreira

Silva

et al. 2021

Toxics

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In this work, carbon dots (CD) were synthesized and coupled to titanium dioxide (TiO2) to improve the photodegradation of antibiotics in aquaculture effluents under solar irradiation. Oxolinic acid (OXA) and sulfadiazine (SDZ), which are widely used in aquaculture, were used as target antibiotics. To prepare nanocomposites of CD containing TiO2, two modes were used: in-situ (CD@TiO2) and ex-situ (CD/TiO2). For CD synthesis, citric acid and glycerol were used, while for TiO2 synthesis, titanium butoxide was the precursor. In ultrapure water (UW), CD@TiO2 and CD/TiO2 showed the largest photocatalytic effect for SDZ and OXA, respectively. Compared with their absence, the presence of CD@TiO2 increased the photodegradation of SDZ from 23 to 97% (after 4 h irradiation), whereas CD/TiO2 increased the OXA photodegradation from 22 to 59% (after 1 h irradiation). Meanwhile, in synthetic sea salts (SSS, 30‰, simulating marine aquaculture effluents), CD@TiO2 allowed for the reduction of SDZ’s half-life time (t1/2) from 14.5 ± 0.7 h (in absence of photocatalyst) to 0.38 ± 0.04 h. Concerning OXA in SSS, the t1/2 remained the same either in the absence of a photocatalyst or in the presence of CD/TiO2 (3.5 ± 0.3 h and 3.9 ± 0.4 h, respectively). Overall, this study provided novel perspectives on the use of eco-friendly CD-TiO2 nanocomposites for the removal of antibiotics from aquaculture effluents using solar radiation.

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“…In order to further improve the utilization of visible light, Bi 2 WO 6 -based heterojunction composites have been developed. [17][18][19][20][21][22][23] Among the strategies to improve the photocatalytic efficiency of Bi 2 WO 6 , it is an effective method to construct the solid solution photocatalyst. Based on the above consideration, the construction of Bi 2 Mo x W 1Àx O 6 solid solutions attracts our interest in particular because of their structural analogy.…”

Section: Introductionmentioning

confidence: 99%

CO₂ photoreduction to CO/CH₄ over Bi₂W_0.5Mo_0.5O₆ solid solution nanotubes under visible light

et al. 2020

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Highly efficient photocatalysis toward tetracycline under simulated solar-light by Ag+-CDs-Bi2WO6: Synergistic effects of silver ions and carbon dots

Cited by 80 publications

References 72 publications

Silver nanoparticles confined in shell-in-shell hollow TiO2 manifesting efficiently photocatalytic activity and stability

Silver nanoparticles confined in shell-in-shell hollow TiO2 manifesting efficiently photocatalytic activity and stability

Photodegradation of Aquaculture Antibiotics Using Carbon Dots-TiO2 Nanocomposites

CO₂ photoreduction to CO/CH₄ over Bi₂W_0.5Mo_0.5O₆ solid solution nanotubes under visible light

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Highly efficient photocatalysis toward tetracycline under simulated solar-light by Ag+-CDs-Bi2WO6: Synergistic effects of silver ions and carbon dots

Cited by 80 publications

References 72 publications

Silver nanoparticles confined in shell-in-shell hollow TiO2 manifesting efficiently photocatalytic activity and stability

Silver nanoparticles confined in shell-in-shell hollow TiO2 manifesting efficiently photocatalytic activity and stability

Photodegradation of Aquaculture Antibiotics Using Carbon Dots-TiO2 Nanocomposites

CO2 photoreduction to CO/CH4 over Bi2W0.5Mo0.5O6 solid solution nanotubes under visible light

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CO₂ photoreduction to CO/CH₄ over Bi₂W_0.5Mo_0.5O₆ solid solution nanotubes under visible light