Freeze-dried PVP–Ag+ precursors to novel AgBr/AgCl–Ag hybrid nanocrystals for visible-light-driven photodegradation of organic pollutants

Chen, Deliang; Chen, Qianqian; Zhang, Wenjie; Ge, Lianfang; Shao, Gang; Fan, Bingbing; Lu, Hongxia; Zhang, Rui; Yang, Daoguo; Shao, Guosheng

doi:10.1016/j.spmi.2015.01.004

Cited by 11 publications

(2 citation statements)

References 58 publications

(91 reference statements)

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“…It is well known that PVP is a homopolymer with imide groups linking each individual unit, in which the N and O atoms have been proved to provide a strong affinity for silver ions on the crystal surface. 22,23 In addition, both PVP and glycerol display reducibility, especially at high temperature. 20 Equipped with these principles and conditions, temperature changes would control the reduction degree of Ag + to Ag 0 located on the crystal surface in the presence of PVP and glycol, the plasma effect of which could achieve a saturated colour.…”

Section: Resultsmentioning

confidence: 99%

Controllable synthesis of coloured Ag⁰/AgCl with spectral analysis for photocatalysis

Fan

Song

et al. 2018

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Controllable synthesis of coloured Ag⁰/AgCl with spectral analysis for photocatalysis

Fan

Song

et al. 2018

RSC Adv.

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“…There still exist two bottlenecks that restrain the application of AgX/Ag plasmonic photocatalysts in wastewater remediation: One is the low separation efficiency of photogenerated charge carriers; the other is the recovery of AgX/Ag photocatalyst. To solve the first problem, AgBr/AgCl/Ag and AgBr/AgI/Ag heterostructure/solid solution have been fabricated. ,,− It was found that the hybrid photocatalysts showed higher activity than the single AgX/Ag in terms of organic degradation. In the case of photocatalyst reuse, the traditional centrifugation and filtration are often associated with serious catalyst loss and high energy consumption .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of 3D Sponge@AgBr-AgCl/Ag and Tubular Photoreactor for Continuous Wastewater Purification under Sunlight Irradiation

Kong

Wang

et al. 2019

ACS Sustainable Chem. Eng.

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Semiconductor photocatalysis is promising for the remediation of organic pollutants in environmental wastewater. At present, the main bottlenecks of relative research lie in how to more effectively improve the sunlight activity of photocatalysts and realize their reutilization. Herein, we assembled AgBr-AgCl/Ag on the skeletons of melamine sponge (MS) by immobilizing Ag nanowires (NWs) on MS skeletons, transferring Ag into AgBr-AgCl, and further reducing part Ag+ into metallic Ag. The microstructures of MS@AgBr-AgCl/Ag were characterized by the means of scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). It was found that AgBr-AgCl/Ag NWs were successfully loaded on the skeletons of MS to form a 3D structure, and there existed a composite structure between AgBr and AgCl. The transient photocurrents and electrochemical impedance analyses revealed that the AgBr-AgCl composite structure effectively decreased the impedance of charge carrier transfer, and consequently MS@AgBr-AgCl/Ag NWs displayed much higher photocurrent than MS@AgBr/Ag NWs and MS@AgCl/Ag NWs. The photocatalytic activities of the samples were evaluated by degrading antibiotic sulfadiazine (SD) and five organic dyes (fuchsin basic, methyl orange, acid orange 7, malachite green, and rhodamine B). Beneficial from the excellent visible-light response and charge carrier separation properties, MS@AgBr-AgCl/Ag NWs displayed the optimal photocatalytic activity among these samples. Radical trapping experiments demonstrated that •O2 – and h+ are the main reactive species responsible for organic contaminant degradation. Based on the results of high performance liquid chromatography–mass spectra (HPLC-MS), the possible structures of the main intermediates toward SD degradation were proposed. By filling MS@AgBr-AgCl/Ag NWs into glass tubes and connecting them together, we fabricated a tubular fixed-bed photoreactor for continuous wastewater purification. Overall, this work provides a reference for constructing visible light driven photocatalysts and fixed-bed photoreactors used for the environmental wastewater purification under sunlight irradiation.

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Regulations of silver halide nanostructure and composites on photocatalysis

Fan

Han

Song

et al. 2017

Adv Compos Hybrid Mater

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The silver halides and their corresponding composites would constitute remarkable photocatalytic systems not only in energy production but also in environmental remediation. The major advantage in these silver halides system is that plasma metal Ag 0 species would be spontaneously generated by silver halides under light irradiation, which play dual roles of expanding light absorption range and charge carriers separation. In this tutorial review, the origin and development of silver halides, synthesis methods, construction of composite structures with other materials, photocatalytic applications, and various and controversial mechanisms are all exhaustively described.

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Freeze-dried PVP–Ag+ precursors to novel AgBr/AgCl–Ag hybrid nanocrystals for visible-light-driven photodegradation of organic pollutants

Cited by 11 publications

References 58 publications

Controllable synthesis of coloured Ag⁰/AgCl with spectral analysis for photocatalysis

Controllable synthesis of coloured Ag⁰/AgCl with spectral analysis for photocatalysis

Fabrication of 3D Sponge@AgBr-AgCl/Ag and Tubular Photoreactor for Continuous Wastewater Purification under Sunlight Irradiation

Regulations of silver halide nanostructure and composites on photocatalysis

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Freeze-dried PVP–Ag+ precursors to novel AgBr/AgCl–Ag hybrid nanocrystals for visible-light-driven photodegradation of organic pollutants

Cited by 11 publications

References 58 publications

Controllable synthesis of coloured Ag0/AgCl with spectral analysis for photocatalysis

Controllable synthesis of coloured Ag0/AgCl with spectral analysis for photocatalysis

Fabrication of 3D Sponge@AgBr-AgCl/Ag and Tubular Photoreactor for Continuous Wastewater Purification under Sunlight Irradiation

Regulations of silver halide nanostructure and composites on photocatalysis

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Controllable synthesis of coloured Ag⁰/AgCl with spectral analysis for photocatalysis

Controllable synthesis of coloured Ag⁰/AgCl with spectral analysis for photocatalysis