ChemInform Abstract: A Novel Ag<sub>3</sub>AsO<sub>4</sub> Visible‐Light‐Responsive Photocatalyst: Facile Synthesis and Exceptional Photocatalytic Performance.

Tang, Jianting; Liu, Yonghong; Li, Haizhu; Tan, Zhen; Li, Datang

doi:10.1002/chin.201332021

Cited by 3 publications

(5 citation statements)

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“…The slight decrease in photocatalytic activity may be attributed to the shielding of absorption of incident light by Ag 0 content (7.40%) on Ag 3 PO 4 MS. Thus, the result implies that the surface plasmon resonance effect of Ag 58,59 also counteracts the aforementioned shielding effect in the photocatalytic process.…”

Section: ■ Results and Discussionmentioning

confidence: 82%

Sustainable Design of Hierarchically Porous Ag₃PO₄ Microspheres through a Novel Natural Template and Their Superior Photooxidative Capacity

Mandal

Ananthakrishnan

2017

ACS Sustainable Chem. Eng.

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Uniform hierarchical Ag 3 PO 4 porous microspheres were synthesized for the first time by a sustainable route based on a novel natural bone glue (BG)-assisted onestep precipitation reaction at room temperature. By varying experimental conditions such as the bone glue content, template constituents (amino acid, alginic acid), precursor concentration, temperature, pH, and reaction time, we could tune the morphology, porosity, size, and properties of Ag 3 PO 4 . All of the phases, microstructures with different architectures, and textural properties of the Ag 3 PO 4 were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Brunauer−Emmett−Teller surface area analysis, and UV−vis diffuse reflectance spectroscopy. The oxidation state, local structure, and purity of the prepared Ag 3 PO 4 were further characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, and thermogravimetric analysis. The influence of the template on the morphology was characterized by syntheses of Ag 3 PO 4 using different templates such as glycine, alanine, and alginic acid, and products such as pyramidal-shaped Ag 3 PO 4 , Ag 3 PO 4 dodecahedra, and coiled-rod-like porous Ag 3 PO 4 were obtained, respectively. This revealed that self-assembly of the collagen protein present in the bone glue plays a significant role as a structure-directing agent, crystal growth modifier, and aggregation-orienting agent in the formation of unique Ag 3 PO 4 porous microspheres. Detailed photocatalytic studies on aqueous rhodamine B and 2,4-dichlorophenol (2,4-DCP) in the presence of Ag 3 PO 4 porous microspheres exhibited enhanced photocatalytic degradation under visible light that was significantly higher than for other architectures. The findings of this study should offer new insights into the development of porous hierarchical materials as high-performance visible-light photocatalysts and their potential utilization in environmental sustainability.

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Section: ■ Results and Discussionmentioning

confidence: 82%

Sustainable Design of Hierarchically Porous Ag₃PO₄ Microspheres through a Novel Natural Template and Their Superior Photooxidative Capacity

Mandal

Ananthakrishnan

2017

ACS Sustainable Chem. Eng.

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“…Accordingly, Ag(I)-CP is able to generate ROS ( • OH) from an aqueous system, as holes (h + ) generated in the VB have a potential (+3.40 V vs NHE) below the reduction potential for H 2 O/ • OH (+2.32 V vs NHE at pH 7). 15,17 This favors the production of oxidizing species thermodynamically (Figure 9b). The position of the VBM edge of the CP (+3.40 V vs NHE) is deeper than VBM (<+3 V vs NHE) of other common semiconductor systems such as TiO 2, 49 ZnO, 49 Ag 2 O, 44 and CuO.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…This represents important target compound for removal by oxidation as its presence in water causes hazardous pollution in the environment. 15,44,45 Before light irradiation, the reaction vessel containing (20 mL of 25 ppm) tartrazine and prepared CP (1 mg mL −1 ) was placed in the dark and stirred for 30 min to achieve adsorption−desorption equilibrium and Ag(I)-CP. Thereafter, the light was turned on.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…14−16 However, their low-lying hybridized 5s−5s states and/or 5s/5p−4d states of silver in the conduction band minimum (CBM) facilitate the reduction of lattice Ag + resulting in a high level of photoleaching. 14,15 Additionally, low surface area and stability prevent large-scale use of these simple compounds for photocatalytic applications. 14,17 CPs/MOFs of Ag(I) with suitable organic linkers can provide an alternative strategy to design highly active photocatalytic materials.…”

Section: ■ Introductionmentioning

confidence: 99%

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Photoactive Ag(I)-Based Coordination Polymer as a Potential Semiconductor for Photocatalytic Water Splitting and Environmental Remediation: Experimental and Theoretical Approach

et al. 2019

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Metal organic frameworks (MOFs) or Metal coordination polymers (CPs) with controlled structure on the micro/nano-scale have attracted intense interest for potential applications in a wide variety of fields, such as energy storage and conversion, chemical and biological sensing, and catalysis. Here, we report a new class of photocatalytic material, Ag(I) based nano-micro structured coordination polymer (Ag(I)-CP), which offer performance at a level competitive with known semiconductors in photocatalytic water oxidation and oxidation of organic compounds, such as dye/ organic pollutants present in contaminated water. The coordination polymer was synthesized by a wet-chemical route and has been characterized using powder X-ray diffraction, X-ray photoelectron spectroscopy and electron microscopy. The 2 Ag(I)-CP has notable semiconducting characteristics and charge transfer ability due to ligand centered charge transfer (LCCT) in combination with metal to ligand charge transfer MLCT (Ag-O cluster to ligand centre) as established from experimental absorption, luminescence and photoelectrochemical measurements alongside DFT calculations. Notably, Ag(I)-CP exhibits a highly reactive valance band potential +3.40 V vs NHE, composed of hybridized state of O 2p and C 2p through the organic linker and Ag 4d, this acts as an active center for the generation of reactive oxygen species (ROS) i.e., hydroxyl radical and h + under photocatalytic conditions. Consequently, the photogenerated species facilitate effective oxidations of water and organic contaminants such as tartrazine, rhodamine B and 2, 4-dichlorophenol under UV light irradiation. Furthermore, our results suggest that the Ag(I)-CP could be used as a promising material for the development of heterostructure for variety of photo-assisted-redox catalysis.

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“…Generally speaking, the weaker PL emission intensity of the peaks indicates the lower recombination rate of photogenerated hole− electron pairs and, therefore, the enhanced photocatalytic performance. 57 Hence, the almost quenched PL intensity implies that 3.5 wt % Co-NG/TiO 2 nanobelts composite owns the longest lifespan of charge carriers and the highest separation efficiency of photoinduced charge pairs among the three samples, which is due to the photogenerated electrons rapidly transferring from TiO 2 to Co atoms through NG as an "electron highway" and therefore resulting in spatially separated electrons and holes between the single Co site and TiO 2 nanobelts.…”

Section: ■ Results and Discussionmentioning

confidence: 96%

Efficient Noble-Metal-Free Co-NG/TiO₂ Photocatalyst for H₂ Evolution: Synergistic Effect between Single-Atom Co and N-Doped Graphene for Enhanced Photocatalytic Activity

Lan

et al. 2018

ACS Sustainable Chem. Eng.

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Photocatalytic water splitting for H2 evolution is appealing for transforming solar energy into clean chemical fuel. This technique generally requires noble metals as H2 evolution cocatalysts to facilitate efficient cleavage of water. Herein, we report a noble-metal-free TiO2 nanobelts composite photocatalyst, in which TiO2 nanobelts are supported by nitrogen-doped graphene coordinated with a single Co atom (Co-NG). The results show that Co-NG is an efficient cocatalytst for the photocatalytic H2 production over TiO2. The optimal amount of Co-NG loading is found to be 3.5 wt %, showing a H2 evolution rate of 677.44 μmol h–1 g–1 under illumination of AM 1.5 G simulated sunlight, which is close to that of platinized TiO2 nanobelts and 2.6 and 31.2 times greater than that of 3.5 wt % NG/TiO2 nanobelts composite and pure TiO2 nanobelts, respectively. The significantly improved photocatalytic activity is ascribed to the remarkable synergistic effect between single-atom Co and N-doped graphene, which serve as effective H+ reduction sites and efficient electron acceptors, respectively. Besides, the Co-NG cocatalyst also effectively retards the recombination of photoinduced charge carriers and leads to a prolonged lifetime of charge pairs. This study reveals that Co-NG is an up-and-coming candidate as cocatalyst for development of cost-effective photocatalysts for efficient solar-driven H2 evolution.

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ChemInform Abstract: A Novel Ag₃AsO₄ Visible‐Light‐Responsive Photocatalyst: Facile Synthesis and Exceptional Photocatalytic Performance.

Abstract: The title compound is precipitated at room temperature by slowly combining an aqueous AgNO3 solution with an aqueous solution containing Na2HAsO3, H2O2, and NH4OH.

Cited by 3 publications

References 1 publication

Sustainable Design of Hierarchically Porous Ag₃PO₄ Microspheres through a Novel Natural Template and Their Superior Photooxidative Capacity

Sustainable Design of Hierarchically Porous Ag₃PO₄ Microspheres through a Novel Natural Template and Their Superior Photooxidative Capacity

Photoactive Ag(I)-Based Coordination Polymer as a Potential Semiconductor for Photocatalytic Water Splitting and Environmental Remediation: Experimental and Theoretical Approach

Efficient Noble-Metal-Free Co-NG/TiO₂ Photocatalyst for H₂ Evolution: Synergistic Effect between Single-Atom Co and N-Doped Graphene for Enhanced Photocatalytic Activity

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ChemInform Abstract: A Novel Ag3AsO4 Visible‐Light‐Responsive Photocatalyst: Facile Synthesis and Exceptional Photocatalytic Performance.

Abstract: The title compound is precipitated at room temperature by slowly combining an aqueous AgNO3 solution with an aqueous solution containing Na2HAsO3, H2O2, and NH4OH.

Cited by 3 publications

References 1 publication

Sustainable Design of Hierarchically Porous Ag3PO4 Microspheres through a Novel Natural Template and Their Superior Photooxidative Capacity

Sustainable Design of Hierarchically Porous Ag3PO4 Microspheres through a Novel Natural Template and Their Superior Photooxidative Capacity

Photoactive Ag(I)-Based Coordination Polymer as a Potential Semiconductor for Photocatalytic Water Splitting and Environmental Remediation: Experimental and Theoretical Approach

Efficient Noble-Metal-Free Co-NG/TiO2 Photocatalyst for H2 Evolution: Synergistic Effect between Single-Atom Co and N-Doped Graphene for Enhanced Photocatalytic Activity

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ChemInform Abstract: A Novel Ag₃AsO₄ Visible‐Light‐Responsive Photocatalyst: Facile Synthesis and Exceptional Photocatalytic Performance.

Sustainable Design of Hierarchically Porous Ag₃PO₄ Microspheres through a Novel Natural Template and Their Superior Photooxidative Capacity

Sustainable Design of Hierarchically Porous Ag₃PO₄ Microspheres through a Novel Natural Template and Their Superior Photooxidative Capacity

Efficient Noble-Metal-Free Co-NG/TiO₂ Photocatalyst for H₂ Evolution: Synergistic Effect between Single-Atom Co and N-Doped Graphene for Enhanced Photocatalytic Activity