Connecting structural, optical, and electronic properties and photocatalytic activity of Ag3PO4:Mo complemented by DFT calculations

Trench, Aline B.; Machado, Thales R.; Gouveia, Amanda Fernandes; Assis, Marcelo; Trindade, Letícia Guerreiro da; Santos, Clayane Carvalho dos; Перрин, А.; Perrin, Christiane; Oliva, Mónica; Andrés, Juán; Longo, Elson

doi:10.1016/j.apcatb.2018.07.019

Cited by 63 publications

(59 citation statements)

References 64 publications

(75 reference statements)

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“…Many studies have shown that reactive oxygen species (ROS), such as hydroxyl radicals (OH * ), singlet oxygen ( 1 O 2 ), and hydroperoxyl radicals (HOO * ), are responsible for the photocatalytic activity of semiconductors, which are photo‐induced by holes and electrons (

h^{•}

and

e^{^{'}}

, respectively) . According to Rehan et al .…”

Section: Resultsmentioning

confidence: 99%

“…This happens because semiconductors that present an E gap in the near‐ultraviolet region, which are more susceptible to photocorrosion, and causes the active sites of the materials to be covered by the new species produced during the photocatalytic process . In some studies of the group with Ag‐based materials, it was possible to observe the formation of Ag 0 and Ag‐based oxides during the photocatalytic cycles, and that depending on the concentration of these species, at first a slight increase in the photocatalysis, followed later by a decrease in photocatalytic efficiency due to degradation of the Ag‐based material . Since the AgX (X=Cl, Br and I) solubility constant follows the order‐AgCl (1.77×10 −10 ) > AgBr (5.35×10 −12 ) > AgI (8.52×10 −17 )‐AgCl and AgBr are more susceptible to photocorrosion and the loss of efficiency during the photocatalytic cycles being more pronounced for these materials .…”

Section: Resultsmentioning

confidence: 99%

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Ag Nanoparticles/AgX (X=Cl, Br and I) Composites with Enhanced Photocatalytic Activity and Low Toxicological Effects

et al. 2020

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Periodic structures induced by electron irradiation are a unique phenomenon when electron beams irradiate on the surface of some materials. These periodic structures have potential for technological applications. However, the fuzzy nature of the electron-induced structuring hinders its further exploration in such applications. In this paper, novel Ag nanoparticle/AgX (X=Cl, Br and I) composites, with enhanced photocatalytic activity and low toxicological effects, were prepared, for the first time, using electron beam irradiation. The remarkable advantage of this approach is that the Ag nanoparticles/AgX composites can be easily prepared in one-step without the need for high-pressure conditions, surfactants, ionic liquids, or reducing agents. Furthermore, our method does not involve any toxic substances, which makes the as-synthesized samples highly applicable for technological applications. The structure, morphology and physicochemical properties of the Ag nanoparticles/AgX composites were studied using various characterization techniques. Using first-principles calculations based on density functional theory and the quantum theory of atoms in molecules, we reveal how the concentration of excess electrons in the AgX materials induces the formation of the Ag nanoparticles under electron beam irradiation. These results extend the fundamental understanding of the atomic process underlying the mechanism of AgÀ X bond rupture observed during the transformation induced via electron irradiation of the AgX crystals by increasing the total number of electrons in the bulk structure. Thus, our findings provide viable guidance for the realization of new materials for the degradation of contaminated wastewater with low toxicity.

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h^{•}

and

e^{^{'}}

, respectively) . According to Rehan et al .…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Ag Nanoparticles/AgX (X=Cl, Br and I) Composites with Enhanced Photocatalytic Activity and Low Toxicological Effects

et al. 2020

Self Cite

View full text Add to dashboard Cite

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“…Clearly, the promise of these materials will need signicantly more detailed studies, e.g. physicochemical (for example ESR), [80][81][82][83] in vitro, 84 in silico, [85][86][87] in vivo (in pre-clinical models, e.g. small mammals), 88 and there-aer clinical trials prior to translation to the clinic; such nanocomposites therefore have a variety of potential technical and medical applications.…”

Section: Discussionmentioning

confidence: 99%

Bioactive silver phosphate/polyindole nanocomposites

et al. 2020

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“…[ 13 ] In order to overcome these weaknesses and improve its photocatalytic performance, numerous methods were adopted. [ 14,15 ] The efforts mainly included controlling the crystal morphology, [ 16 ] facet engineering, [ 17 ] metal deposition, [ 18 ] ion doping, [ 19 ] or coupling with another semiconductor. [ 20 ] All these attempts demonstrate that the key to solve the problem is to achieve effective spatial separation and rapid transfer of photogenerated charges to the surface reaction sites.…”

Section: Introductionmentioning

confidence: 99%

Construction of Built‐In Electric Field within Silver Phosphate Photocatalyst for Enhanced Removal of Recalcitrant Organic Pollutants

Lin

Yang

et al. 2020

Adv Funct Materials

148

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Semiconductor photocatalysis technology has aroused great interest in photocatalytic degradation, but it suffers from the drawbacks of fast electron‐hole recombination and unsatisfactory degradation efficiency. Herein, a novel photocatalyst Ag3PO4@NC with excellent photocatalytic activity is successfully prepared, characterized, and evaluated for the efficient removal of organic pollutants. After visible light irradiation for 5, 8, and 12 min, the photocatalytic degradation efficiency of norfloxacin, diclofenac, and phenol on the composite catalyst reaches 100%, and the apparent rate constant of which is 19.2, 48.7, and 23.2 times than that of the pure Ag3PO4, respectively. The density functional theory calculation results indicate that there is a built‐in electric field from N‐doped carbon (NC) to Ag3PO4 at the interface of the composite catalyst. Driven by the electric field, the photogenerated electrons of Ag3PO4 can be readily transferred to the NC, leading to the efficient separation of photogenerated carriers and the significant improvement of the catalytic performance. The results of radical trapping experiments and electron spin resonance analysis show that photogenerated holes and O2− play an important role in the photodegradation process. This work provides a universal strategy of construction built‐in electric field through coupling with NC to improve the photocatalytic performance of photocatalysts.

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Connecting structural, optical, and electronic properties and photocatalytic activity of Ag3PO4:Mo complemented by DFT calculations

Cited by 63 publications

References 64 publications

Ag Nanoparticles/AgX (X=Cl, Br and I) Composites with Enhanced Photocatalytic Activity and Low Toxicological Effects

Ag Nanoparticles/AgX (X=Cl, Br and I) Composites with Enhanced Photocatalytic Activity and Low Toxicological Effects

Bioactive silver phosphate/polyindole nanocomposites

Construction of Built‐In Electric Field within Silver Phosphate Photocatalyst for Enhanced Removal of Recalcitrant Organic Pollutants

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