Defect-engineering of Pt/Bi4NbO8Br heterostructures for synergetic promotional photocatalytic removal of versatile organic contaminants

2021 ◽  
Author(s):  
Liang Shi ◽  
Xilu Wu ◽  
Chonglei Xu ◽  
Qiang Bai ◽  
Zhen Nie ◽  
...  
Keyword(s):  
Organic Contaminants ◽  
Oxygen Vacancies ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Organic Pollutant ◽  
Pollutant Removal ◽  
Defect Engineering ◽  
Chemical Reduction Method ◽  
Photocatalytic Removal

Defective Pt/Bi4NbO8Br composites were fabricated via a facile in situ chemical reduction method. The synergistic effect of Pt and oxygen vacancies endows the hybrid photocatalysts with enhanced efficiency for versatile organic pollutant removal.

Preparation of Pd@Gr Composite Materials and Research on Catalytic Performance

2019 ◽  
Vol 944 ◽  
pp. 671-677
Author(s):  
Jin Feng Leng ◽  
Kang Wang ◽  
Chang Peng Xia
Keyword(s):  
Reduction Method ◽  
Chemical Reduction ◽  
Great Influence ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
Chemical Oxidation ◽  
Chemical Reduction Method ◽  
Graphene Surface ◽  
Oxidation Reduction

In this work, the preparation of graphene by chemical oxidation reduction method and a series of chemical reactions to get graphene oxide, with the preparation of graphene composites by simply chemical reduction method for the preparation of palladium/graphene composites. Through the chemical reduction method, the small size of Pd nanoparticles is acquired by controlling the content of reducing agent. The Pd nanoparticles on graphene surface is 10nm size and evenly distributed. Pd2+ adsorption on graphene surface and in situ were partially reduced to Pd to Pd2+ nanoparticles by the reducibility of graphene. In the process, the graphene was reduced to graphene and the final compound was thinner and more transparent than the pre-experiment oxide. The oxygen-containing functional groups on the surface of the graphene have influence to the nucleation and growth of metal nanoparticles and KI can control the morphology and size of nanoparticles. The particle size and dispersion uniformity have great influence on the catalytic performance of composites, the smaller particles have better catalytic performance. Keywords:palladium, graphene composites, nanoparticles

Enhancement of Photocatalytic Performance of Anatase by Silver Deposition through Chemical Reduction Process at Room Temperature

2020 ◽  
Vol 998 ◽  
pp. 71-77
Author(s):  
Tanaporn Narkbuakaew ◽  
Pornapa Sujaridworakul
Keyword(s):  
Rhodamine B ◽  
Room Temperature ◽  
Photocatalytic Performance ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Organic Pollutant ◽  
Reduction Process ◽  
Chemical Reduction Method ◽  
Silver Deposition ◽  
Environmental Application

Herein, Ag-anatase photocatalysts were synthesized though chemical reduction method under room temperature by using PVP and NaBH4 as stabilizer and strong reducing agent, respectively. The prepared photocatalysts were characterized by the following technique: XRD, SEM, HR-TEM, EDX, and UV-Vis-NIR. The photocatalytic performance of 0.05 g of photocatalysts were performed under UV irradiation within 1 h by using 10 mg/L of rhodamine B as the representative of organic pollutant. The results demonstrated that the optimum Ag loading contents were 2 %wt (2-ST) which can degrade rhodamine B up to 98.54%. Therefore, the photocatalytic performance of bare anatase could be enhanced by deposited Ag nanoparticles. Further, this prepared Ag-anatase could be suitable for environmental application.

Antimicrobial Activity of Silver Nanoparticles Prepared Under an Ultrasonic Field

2011 ◽  
Vol 4 (3) ◽  
pp. 1491-1496
Author(s):  
Umadevi M ◽  
Rani T ◽  
Balakrishnan T ◽  
Ramanibai R
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Reduction Method ◽  
Therapeutic Potential ◽  
Chemical Reduction ◽  
Ultrasonic Field ◽  
Great Promise ◽  
Chemical Reduction Method ◽  
E Coli

Nanotechnology has great promise for improving the therapeutic potential of medicinal molecules and related agents. In this study, silver nanoparticles of different sizes were synthesized in an ultrasonic field using the chemical reduction method with sodium borohydride as a reducing agent. The size effect of silver nanoparticles on antimicrobial activity were tested against the microorganisms Staphylococcus aureus (MTCC No. 96), Bacillus subtilis (MTCC No. 441), Streptococcus mutans (MTCC No. 497), Escherichia coli (MTCC No. 739) and Pseudomonas aeruginosa (MTCC No. 1934). The results shows that B. subtilis, and E. coli were more sensitive to silver nanoparticles and its size, indicating the superior antimicrobial efficacy of silver nanoparticles. 

scholarly journals Synthesis of Cu core Ag shell nanoparticles using chemical reduction method

2015 ◽  
Vol 6 (2) ◽  
pp. 025018 ◽  
Author(s):  
Dung Chinh Trinh ◽  
Thi My Dung Dang ◽  
Kim Khanh Huynh ◽  
Eric Fribourg-Blanc ◽  
Mau Chien Dang
Keyword(s):  
Reduction Method ◽  
Chemical Reduction ◽  
Chemical Reduction Method ◽  
Shell Nanoparticles

Enhanced magnetic behavior of hydrogenated Fe and FeCo nanoparticles prepared by chemical reduction method

2020 ◽  
Author(s):  
Theertharaman G. ◽  
Nibin K. Mathew ◽  
Rohith K. Vinod ◽  
P. Saravanan ◽  
S. Balakumar
Keyword(s):  
Reduction Method ◽  
Chemical Reduction ◽  
Magnetic Behavior ◽  
Chemical Reduction Method ◽  
Feco Nanoparticles

scholarly journals Using a non-reducing sugar in the green synthesis of gold and silver nanoparticles by the chemical reduction method

DYNA ◽  
2018 ◽  
Vol 85 (206) ◽  
pp. 69-78 ◽  
Author(s):  
Wilson Agudelo ◽  
Yuliet Montoya ◽  
John Bustamante
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Reducing Sugar ◽  
Chemical Reduction Method ◽  
Gold And Silver Nanoparticles ◽  
Uv Visible

El uso de compuestos químicos más biocompatibles y renovables para la obtención de nanopartículas metálicas con propiedades y características deseadas, se convierte en una ruta alternativa para la reducción de riesgos ambientales y del grado de incompatibilidad de estas estructuras al interactuar con modelos biológicos para su posible aplicación en el área de la salud. El propósito de este trabajo se centró en el uso de sacarosa, como agente reductor de nanopartículas de oro y plata al emplear diferentes volúmenes de hidróxido de sodio. Las nanopartículas obtenidas fueron caracterizadas mediante espectrometría UV-visible, microscopía electrónica de transmisión TEM y espectroscopia infrarroja por transformada de Fourier FTIR, la cual permitió determinar los plasmones de resonancia superficial, tamaños de partícula experimentales y teóricos, morfología y cambios estructurales en el agente reductor, así como la influencia del hidróxido de sodio en el proceso de síntesis. Los resultados obtenidos confirman la formación de nanopartículas de oro y plata mediante la previa formación de azúcares reductores. Así mismo, la oxidación del grupo funcional de la glucosa a sales de ácido carboxílico.

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