Green synthesis of Ag nanoparticles decorated phosphorus doped g-C3N4 with enhanced visible-light-driven bactericidal activity

Publication date: Available online 8 August 2019Source: Journal of Photochemistry and Photobiology A: ChemistryAuthor(s): Peng She, Jun Li, Hegang Bao, Xiuquan Xu, Zhou HongA b s t r a c tIn this present study, a novel visible-light-driven Ag nanoparticles (Ag NPs) decorated P-doped g-C3N4 (Ag/PCN) composites were successfully fabricated via a facile method combination of one-pot pyrolysis and green reduction. The structure information of as-prepared samples were well characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), and UV-visible diffuse reflectance spectroscopy (UV-vis DRS), respectively. The photocatalytic bactericidal activity against representative Gram-negative bacteria of E. coli was employed to evaluate the photocatalytic performance of as-prepared samples. Compared to CN, PCN and Ag/CN, the Ag/PCN composites exhibited the highest visible-light-driven bactericidal activity and could completely inactivate 7.0 log CFU·mL-1 of E. coli in 60 min, which were main attributed to the narrowed bandgap, the enhanced visible light response and the accelerated separation rate of photo-generated charges via Ag NPs decorating together with P element doping. Meanwhile, the results of radical trapping experiments revealed that the surface produced superoxide radical (·O2-) and photo-generated holes (h+) were the dominant active spe...
Source: Journal of Photochemistry and Photobiology A: Chemistry - Category: Chemistry Source Type: research

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Publication date: Available online 15 September 2019Source: Journal of Photochemistry and Photobiology B: BiologyAuthor(s): Saira Shams, Arif Ullah Khan, Qipeng Yuan, Waqas Ahmad, Yun Wei, Zia Ul Haq Khan, Sumaira Shams, Aftab Ahmad, Aziz Ur Rahman, Sadeeq UllahAbstractThe development of eco-benign experimental procedures for the synthesis of nanomaterials is a fundamental developing branch of green nanotechnology. In this paper, green synthetic route was followed to synthesize novel Au@Fe2O3nanocomposite using Citrus sinensis fruit extract as a reducing and stabilizing agent. The as synthesized Au@Fe2O3nanocomposite was s...
Source: Journal of Photochemistry and Photobiology B: Biology - Category: Speech-Language Pathology Source Type: research
Publication date: Available online 13 September 2019Source: Colloids and Surfaces B: BiointerfacesAuthor(s): Qingmiao Zhang, Yilei Wang, Wenkun Zhang, Michael E. Hickey, Zhuangsheng Lin, Qin Tu, Jinyi WangAbstractNanofibrous membranes which exhibit bacteriostatic functions are a good strategy to prevent microorganisms from adhering to the surface of biomaterials. Here, we report the synthesis of such a nanofibrous membrane which can be applied to biological coatings to reduce bacteriostatic functionality. Ascorbic acid was utilized to reduced chloroauric acid to gold nanoparticles (AuNPs). Dopamine was then polymerized upo...
Source: Colloids and Surfaces B: Biointerfaces - Category: Biochemistry Source Type: research
Platelets are anucleate cells produced by megakaryocytes. In recent years, a robust body of literature supports the evolving role of platelets as key sentinel and effector cells in infectious diseases, especially critical in bridging hemostatic, inflammatory, and immune continuums. Upon intravascular pathogen invasion, platelets can directly sense viral, parasitic, and bacterial infections through pattern recognition receptors and integrin receptors or pathogen: immunoglobulin complexes through Fc and complement receptors—although our understanding of these interactions remains incomplete. Constantly scanning for are...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
utarowska Studies on the functionalization of materials used for the construction of filtering facepiece respirators (FFRs) relate to endowing fibers with biocidal properties. There is also a real need for reducing moisture content accumulating in such materials during FFR use, as it would lead to decreased microorganism survival. Thus, in our study, we propose the use of superabsorbent polymers (SAPs), together with a biocidal agent (biohalloysite), as additives in the manufacturing of polypropylene/polyester (PP/PET) multifunctional filtering material (MFM). The aim of this study was to evaluate the MFM for stability...
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research
Publication date: Available online 10 September 2019Source: Microchemical JournalAuthor(s): Qiling Zhang, Wen Liu, Zhengjun Gong, Wenjun Wang, Dongmei Wang, Xinchen Jiang, Lu Zheng, Shiwei Yang, Meikun FanAbstractThe availability of sensitive, reproducible, and broad spectral window range surface enhanced infrared absorption spectroscopy (SEIRAS) substrate is essential to the wide application of SEIRAS technique. Here, a facile method was proposed for the preparation of full mid-infrared range transmission surface-enhanced infrared absorption spectroscopy (T-SEIRAS) substrate, where silver nanoparticles (Ag NPs) was synthe...
Source: Microchemical Journal - Category: Chemistry Source Type: research
Abstract Benign polymeric and textile based materials having multifaceted features such as antibacterial performance, hydrophobic property and photocatalytic activity are highly interesting from the both human health and environment observations. Herein, a cytocompatible polyester fiber composite incorporated via photocatalytic nano copper ferrite/myristic-lauric fatty acids coating with antibacterial and hydrophobic performances was prepared through one-pot facile fabrication route. X-ray diffraction analysis, energy-dispersive X-ray spectroscopy, mapping images, Field-emission scanning electron microscope and Fo...
Source: Appl Human Sci - Category: Physiology Authors: Tags: Mater Sci Eng C Mater Biol Appl Source Type: research
Abstract Metal-organic framework (MOF) based graphene oxide (GO) recently merits of attention because of the relative correspondence of GO with metal ions and organic binding linkers. Furthermore, introducing the GO to the Co-MOF to make a new nanoporous hybrid have are improved the selectivity and stability of the Co-MOF. Here the graphene oxide/cobalt metal organic framework (GO/Co-MOF) was synthesized by a solvothermal process using cobalt salt and terephthalic acid and used for biocidal activity, against the growth of the Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus bacteria. X-ray di...
Source: Appl Human Sci - Category: Physiology Authors: Tags: Mater Sci Eng C Mater Biol Appl Source Type: research
Abstract A novel Z-scheme AgBr/Ag2MoO4@ZnO photocatalyst was fabricated via a hydrothermal process and in situ growth method. X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy were used to determine the structure of the photocatalyst. The results showed that the composites were tightly connected by the (101) lattice plane of ZnO, the (222) plane of Ag2MoO4 and the (200) lattice plane of AgBr. Because of the strong redox activity and good separability of photoelectrons and holes induced by the Z-scheme structure, the photodegradation rate for ciprofloxacin (CIP) solution wa...
Source: Biofouling - Category: Molecular Biology Authors: Tags: Biofouling Source Type: research
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Source: Journal of Microbiological Methods - Category: Microbiology Source Type: research
Publication date: 15 November 2019Source: Materials Letters, Volume 255Author(s): Shangpeng Liu, Jianwei Ma, Shuang Wang, Shaojuan Chen, Bin Wang, Jiwei LiAbstractIn this work, silver nanoparticles (Ag NPs) were incorporated into the flower-like hierarchical chitosan/calcium pyrophosphate hybrid microflowers (CS-CaP) via an in situ reduce process by polydopamine (PDA). Scanning electron microscope (SEM) observation, Energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analysis confirmed the formation of Ag NPs on the petals of CS/CaP (Ag@CS/CaP). Since the hierarchical s...
Source: Materials Letters - Category: Materials Science Source Type: research
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