Synthesis of Ag3PO4/SnO2 composite photocatalyst for improvements in photocatalytic activity under visible light

Silva, Gabriela N.; Martins, Tiago A.; Nogueira, I. C.; Santos, Ricardo K.; Li, Máximo S.; Longo, E.; Botelho, Gleice

doi:10.1016/j.mssp.2021.106064

Cited by 25 publications

(5 citation statements)

References 60 publications

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“…The main diffraction peaks at 26.58°, 33.88°, 51.75°correspond to the tetragonal SnO 2 (110), (101), (211) crystal faces (PDF#41-1445), and the diffraction peaks at 30.96°, 44.35°correspond to the cubic phase AgBr (200), (220) crystal face (PDF#06-0438). 27,28 There are no other peaks, indicating that SnO 2 and AgBr have high purity. The diffraction peaks position of SnO 2 with different molar ratios did not change, indicating that AgBr did not change the crystal shape of SnO 2 through surface loading.…”

Section: Resultsmentioning

confidence: 99%

AgBr nanoparticle surface modified SnO₂ enhanced visible light catalytic performance: characterization, mechanism and kinetics study

Dai,

Yang,

et al. 2023

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

AgBr nanoparticle surface modified SnO₂ enhanced visible light catalytic performance: characterization, mechanism and kinetics study

Dai,

Yang,

et al. 2023

RSC Adv.

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“…When the molar ratio of Ag 3 PO 4 to TiO 2 (B) reached 1.5:1, the photocatalytic performance of the composite far exceeded (was nearly five times) that of the pure TiO 2 (B) nanobelt. We believe that the enhancement of the photocatalytic ability of the composite was, first, due to the introduction of Ag 3 PO 4 , which greatly expanded the absorption range of the material within the solar spectrum and enhanced the absorption of visible light [24][25][26] and, second, because of the construction of heterojunctions, which promoted the separation of photogenerated electron-hole pairs and inhibited their recombination [27][28][29]. In addition, it can be seen from the mapping results that the two substances constructed heterojunctions that were highly uniformly distributed, which gave full play to their role in the composite.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Ag3PO4/TiO2(B) Heterojunction Nanobelt with Extended Light Response and Enhanced Photocatalytic Performance

Liu

Zhang

et al. 2021

Molecules

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Photocatalytic degradation, as an emerging method to control environmental pollution, is considered one of the most promising environmental purification technologies. As Tibet is a region with some of the strongest solar radiation in China and even in the world, it is extremely rich in solar energy resources, which is ideal for applying photocatalytic technology to its ecological environment protection and governance. In this study, Na2Ti3O7 nanobelts were prepared via a hydrothermal method and converted to TiO2∙xH2O ion exchange, which was followed by high-temperature calcination to prepare TiO2(B) nanobelts (“B” in TiO2(B) means “Bronze phase”). A simple in situ method was used to generate Ag3PO4 particles on the surface of the TiO2 nanobelts to construct a Ag3PO4/TiO2(B) heterojunction composite photocatalyst. By generating Ag3PO4 nanoparticles on the surface of the TiO2(B) nanobelts to construct heterojunctions, the light absorption range of the photocatalyst was successfully extended from UV (ultraviolet) to the visible region. Furthermore, the recombination of photogenerated electron–hole pairs in the catalyst was inhibited by the construction of the heterojunctions, thus greatly enhancing its light quantum efficiency. Therefore, the prepared Ag3PO4/TiO2(B) heterojunction composite photocatalyst greatly outperformed the TiO2(B) nanobelt in terms of photocatalytic degradation.

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“…, where k is the kinetic rate constant (Silva et al 2021). The k values found were 3.87x10 −3 min −1 for Ag 3 PO 4 crystals obtained at room temperature and 2.66x10 −3 , 7.42x10 −3 , 5.04x10 −3 , −ln (C /C 0 ) = kt 1.24x10 −3 , and 6.64x10 −3 min −1 for crystals at thermal treated at 100, 200, 300, 400, and 500 ºC, respectively, as displayed in Fig.…”

Section: Photocatalytic Testsmentioning

confidence: 99%

Photodegradation of 17α-ethinylestradiol on Ag3PO4 crystals treated at different temperatures

Nolêto

Vieira

Lopes

et al. 2023

Preprint

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The incorrect disposal of medicines can trigger an imbalance in the ecosystem of rivers and lakes, as well as human and animal health. Therefore, the heterogeneous photocatalysis technique is a promising technology to minimize or even eliminate these pollutants from aquatic systems. Silver phosphate crystals (Ag3PO4) have excellent photocatalytic and bactericidal properties. For the synthesis of crystals of silver phosphate, the method of preparation used was precipitation at room temperature, followed by heat treatment at 100, 200, 300, 400, and 500 ºC for six h. The X-ray Diffraction data show structures with excellent crystallinity, remaining even after temperature variation. Scanning electron microscopy images exhibited a variation in the morphology of the materials with increasing temperature. Diffuse reflectance spectroscopy revealed the materials optical band energy values ranging from 2.33 to 2.41 eV. On the other hand, the Raman and Infrared spectra showed a reduction in the bands referring to the phosphate groups. The Ag3PO4 crystals heat treated at 200 and 500 ºC showed the better performance for the photodegradation of 17α-ethinylestradiol (EE2) with highest kinetic constant (7.42x10− 3 min− 1) and TOF (3.11x10− 4 min − 1) values for photocatalyst test carried out on crystals heat treated at 200 ºC.

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Synthesis of Ag3PO4/SnO2 composite photocatalyst for improvements in photocatalytic activity under visible light

Cited by 25 publications

References 60 publications

AgBr nanoparticle surface modified SnO₂ enhanced visible light catalytic performance: characterization, mechanism and kinetics study

AgBr nanoparticle surface modified SnO₂ enhanced visible light catalytic performance: characterization, mechanism and kinetics study

Preparation of Ag3PO4/TiO2(B) Heterojunction Nanobelt with Extended Light Response and Enhanced Photocatalytic Performance

Photodegradation of 17α-ethinylestradiol on Ag3PO4 crystals treated at different temperatures

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Synthesis of Ag3PO4/SnO2 composite photocatalyst for improvements in photocatalytic activity under visible light

Cited by 25 publications

References 60 publications

AgBr nanoparticle surface modified SnO2 enhanced visible light catalytic performance: characterization, mechanism and kinetics study

AgBr nanoparticle surface modified SnO2 enhanced visible light catalytic performance: characterization, mechanism and kinetics study

Preparation of Ag3PO4/TiO2(B) Heterojunction Nanobelt with Extended Light Response and Enhanced Photocatalytic Performance

Photodegradation of 17α-ethinylestradiol on Ag3PO4 crystals treated at different temperatures

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AgBr nanoparticle surface modified SnO₂ enhanced visible light catalytic performance: characterization, mechanism and kinetics study

AgBr nanoparticle surface modified SnO₂ enhanced visible light catalytic performance: characterization, mechanism and kinetics study