Preparation and photocatalytic properties of visible light driven Ag-AgBr-RGO composite

Yang, Yanqing; Zhang, Weike; Liu, Ruixiang; Cui, Jiamin; Deng, Chao

doi:10.1016/j.seppur.2017.09.003

Cited by 56 publications

(16 citation statements)

References 45 publications

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“…Many PCs were applied for removal of PNP under visible light; TiO 2 , PW12/TiO 2 , 20% g-C 3 N 4 /TiO 2 and ternary photocatalyst composite of PW12/TiO 2 /g-C 3 N 4 with dose of 1 g/L and PNP concentration of 20 mg.L −1 , the conversion of PNP reaches 10%, 20%, 70% and 98.6% under visible-light irradiation, respectively 29 . As well, Ag-AgBr-RGO catalyst is efficient for complete degradation of 5 mg/L of PNP after 180 min of visible light irradiation 30 . Also, over 2 g/L of Bi 2 O 3 PC, maximum of 100% degradation of PNP within 90 min was achieved meanwhile only 35%, 34% and 22% of PNP was degraded under visible light using TiO 2 , ZnO, and ZrO 2 , respectively within 90 min 31 .…”

Section: Resultsmentioning

confidence: 92%

Low temperature-calcined TiO2 for visible light assisted decontamination of 4-nitrophenol and hexavalent chromium from wastewater

Ali

Assirey

Abdel-Moniem

et al. 2019

Sci Rep

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In the present study, alkaline hydrothermally treated titania nanoparticles (TiO2-HT) are prepared and followed by calcination at different low temperatures to improve TiO2 activity under visible light. The prepared photocatalysts (PCs) are characterized by different tools. TiO2-HT is scrutinized for decontamination of para-nitrophenol (PNP) and hexavalent chromium ions (Cr6+ ions) under simulated sunlight. TiO2-HT-300 and TiO2-HT-400 PCs have nanosized particle with large surface area of 148 and 116.26 m2/g, respectively. Additionally, XRD and FTIR proved formation of nanocrystalline anatase TiO2. The different calcined TiO2-HT materials show lower adsorption capacity for PNP and Cr6+ ions. TiO2-HT-300 and HT-TiO2-400 PCs have higher reduction rate of PNP than that of uncalcined temperature titania (HT-TiO2-U) powder. Complete conversion of PNP is achieved at natural pH after 180 min over TiO2-HT-300. As well, TiO2-HT-300 exhibits a superior photocatalytic removal of Cr6+ ions. The enhanced photocatalytic efficacy is ascribed to the synergism between higher surface area and particle size (quantum effect) of TiO2-HT-300. As results, HO· radicals are the main key active species for the photocatalytic degradation of PNP over TiO2- HT-300 PC but contribution of O2– and h+ holes is minor. The used method for preparation of TiO2-HT-300 reduces the cost preparation as well as environmental impact reduction. Finally, low temperature-calcined TiO2 is promising visible light active and an efficient photocatalyst with lower environmental impact for detoxification of PNP and Cr6+ ions from water.

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Section: Resultsmentioning

confidence: 92%

Low temperature-calcined TiO2 for visible light assisted decontamination of 4-nitrophenol and hexavalent chromium from wastewater

Ali

Assirey

Abdel-Moniem

et al. 2019

Sci Rep

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“…Templated structures often are fragile and undergo morphological changes, or degradation under catalytic conditions, which reduces their catalytic activity . Therefore, we probed the stability of IO‐CsPbBr 3 by recycling experiments.…”

Section: Resultsmentioning

confidence: 99%

An Inverse Opal Structured Halide Perovskite Photocatalyst

Schünemann

Tüysüz

2018

Eur J Inorg Chem

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“…22–1012), respectively . Peaks appearing in 26.7°, 30.9°, 44.3°, 52.5°, 55.0°, 64.5° and 73.4° could be well indexed to (111), (200), (220), (311), (222), (400) and (420) of AgBr (JCPDS No.06–0438) . We found that the peak intensity of ZnFe 2 O 4 decreased with the increase of AgBr content, because AgBr was attached to the surface of ZnFe 2 O 4 which affected the growth of ZnFe 2 O 4 crystal nucleus .…”

Section: Resultsmentioning

confidence: 82%

Magnetic retrievable Ag/AgBr/ZnFe₂O₄ photocatalyst for efficient removal of organic pollutant under visible light

Liu

Xue

et al. 2020

Applied Organom Chemis

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In the present work, a visible‐light‐driven Ag/AgBr/ZnFe2O4 photocatalyst has been successfully synthesized via a deposition–precipitation and photoreduction method. The crystal structure, chemical composition, morphology and optical properties of the as‐prepared nanocomposites were characterized by X‐ray diffraction spectroscopy, X‐ray photoelectron spectroscopy, scanning electron microscopy, high‐resolution transmission electron microscopy, energy‐dispersive X‐ray spectroscope, UV–vis diffuse reflectance spectroscopy and photoluminescence. The photocatalytic activities of the Ag/AgBr/ZnFe2O4 nanocomposites were evaluated through the photodegradation of gaseous toluene and methyl orange (MO) under visible light. The results revealed that the as‐prepared Ag/AgBr/ZnFe2O4 nanocomposite exhibited excellent photocatalytic activity. The degrading efficiency of MO could still reach 90% after four cycles, and the Ag/AgBr/ZnFe2O4 nanocomposite could be recycled easily by a magnet. Additionally, the enhanced photocatalytic mechanism was discussed according to the trapping experiments, which indicated that the photo‐generated holes (h+) and •O2− played important roles in photodegradation process. At last, a possible photocatalytic oxidation pathways of toluene was proposed based on the results of GC–MS. The Ag/AgBr/ZnFe2O4 composites showed potential application for efficient removal of organic pollutant.

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Preparation and photocatalytic properties of visible light driven Ag-AgBr-RGO composite

Cited by 56 publications

References 45 publications

Low temperature-calcined TiO2 for visible light assisted decontamination of 4-nitrophenol and hexavalent chromium from wastewater

Low temperature-calcined TiO2 for visible light assisted decontamination of 4-nitrophenol and hexavalent chromium from wastewater

An Inverse Opal Structured Halide Perovskite Photocatalyst

Magnetic retrievable Ag/AgBr/ZnFe₂O₄ photocatalyst for efficient removal of organic pollutant under visible light

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Preparation and photocatalytic properties of visible light driven Ag-AgBr-RGO composite

Cited by 56 publications

References 45 publications

Low temperature-calcined TiO2 for visible light assisted decontamination of 4-nitrophenol and hexavalent chromium from wastewater

Low temperature-calcined TiO2 for visible light assisted decontamination of 4-nitrophenol and hexavalent chromium from wastewater

An Inverse Opal Structured Halide Perovskite Photocatalyst

Magnetic retrievable Ag/AgBr/ZnFe2O4 photocatalyst for efficient removal of organic pollutant under visible light

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Product

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Magnetic retrievable Ag/AgBr/ZnFe₂O₄ photocatalyst for efficient removal of organic pollutant under visible light