Supports matter: unraveling the role of charge transfer in the plasmonic catalytic activity of silver nanoparticles

2017 ◽  
Vol 5 (23) ◽  
pp. 11720-11729 ◽  
Author(s):  
Letizia Papa ◽  
Isabel C. de Freitas ◽  
Rafael S. Geonmonond ◽  
Caroline B. de Aquino ◽  
Joana C. Pieretti ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Charge Transfer ◽  
Ag Nanoparticles ◽  
Catalytic Activities

This paper unravels the role played by charge transfer to and from Ag nanoparticles in their plasmonic catalytic activities.

Role of microporous Janus silica nanosheets in the assembly of ultra-small Ag nanoparticles with high catalytic activity

2021 ◽  
Vol 50 (1) ◽  
pp. 208-216
Author(s):  
Mengnan Yang ◽  
Zhaoli Yan ◽  
Tiantian Li ◽  
Bing Liu ◽  
Qiangshan Jing ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ag Nanoparticles ◽  
High Catalytic Activity ◽  
Charged Surface ◽  
Highly Efficient ◽  
Surface Hydroxyls

Negatively charged surface hydroxyls and micropores of Janus silica nanosheets play a particular role in the highly efficient and dispersed assembly of ultra-small Ag nanoparticles with high catalytic activity.

scholarly journals Synthesis of Bimetallic Gold-Silver (Au-Ag) Nanoparticles for the Catalytic Reduction of 4-Nitrophenol to 4-Aminophenol

Catalysts ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 412 ◽  
Author(s):  
Nurafaliana Berahim ◽  
Wan Basirun ◽  
Bey Leo ◽  
Mohd Johan
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Ag Nanoparticles ◽  
Catalytic Properties ◽  
Catalytic Reduction ◽  
Direct Impact ◽  
Reduction Activity ◽  
Relative Composition ◽  
Catalytic Nanoparticles ◽  
Gold Silver

Bimetallic gold-silver nanoparticles as unique catalysts were prepared using seed colloidal techniques. The catalytic capabilities of the nanoparticles were ascertained in the reduction of 4-nitrophenol to 4-aminophenol in the presence of sodium borohydride. Our results clearly showed that the rate of 4-NP reduction to 4-AP increased with a corresponding decrease in the diameter of the bimetallic NPs. The Au-Ag nanoparticles prepared with 5.0 mL Au seed volume indicated higher reduction activity, which was approximately 1.2 times higher than that of 2.0 mL Au seed volume in the reductive conversion of 4-NP to 4-AP. However, the monometallic NPs showed relatively less catalytic activity in the reductive conversion of 4-NP to 4-AP compared to bimetallic Au-Ag nanoparticles. Our studies also reinforced the improved catalytic properties of the bimetallic Au-Ag nanoparticles structure with a direct impact of the size or diameter and relative composition of the bimetallic catalytic nanoparticles.

An unexpected surfactant role of immiscible nitrogen in the structural development of silver nanoparticles: an experimental and numerical investigation

Nanoscale ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 1749-1758 ◽  
Author(s):  
Jungheum Yun ◽  
Hee-Suk Chung ◽  
Sang-Geul Lee ◽  
Jong-Seong Bae ◽  
Tae Eun Hong ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Numerical Investigation ◽  
Ag Nanoparticles ◽  
Sputter Deposition ◽  
Structural Development ◽  
Free Energies ◽  
Crystalline Orientation ◽  
Oxide Substrates

N-Surfactant-facilitated sputter deposition provides strong selectivity for crystalline orientation and facets due to drastic decreases in the surface free energies of Ag nanoparticles supported on oxide substrates.

scholarly journals Synthesis and Catalytic Activity Studies of Silver Nanoparticles Stabilized in Polymeric Hydro Gel

2021 ◽  
Author(s):  
Jaya T. Varkey
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Conventional Method ◽  
Metallic Nanoparticles ◽  
Biomedical Applications ◽  
Catalytic Reduction ◽  
Catalytic Activities ◽  
Flexible Support ◽  
Profound Influence

Silver nanoparticles (AgNPs) are one of the most vital and fascinating nanomaterials among several metallic nanoparticles that are involved in biomedical applications. But their stabilization towards agglomeration is a serious concern. Synthesized silver nanoparticles can be dispersed in polymeric hydrogel for stabilization and can be efficiently used in heterogeneous catalysis. Polystyrene crosslinked with 1, 6-hexanediol diacrylate can be suitably functionalized for catalytic activities. The nature of the support has a profound influence on the reactivity of the polymeric resin. A flexible support with optimum hydrophilic and hydrophobic balance enhanced the reactivity of the supporting system. Using this supported AgNPs catalytic reduction of Para-nitro phenol can be easily accomplished comparing to conventional method.

Anion-mediated bio-relevant catalytic activity of dinuclear nickel(ii) complexes derived from an end-off compartmental ligand

2019 ◽  
Vol 48 (8) ◽  
pp. 2772-2784 ◽  
Author(s):  
Tonmoy Chakraborty ◽  
Somali Mukherjee ◽  
Sanchari Dasgupta ◽  
Biplab Biswas ◽  
Debasis Das
Keyword(s):  
Catalytic Activity ◽  
Catalytic Activities

The role of anions towards the catalytic activities of antiferromagnetically coupled dinuclear nickel(ii) complexes having end-off compartmental ligand was unveiled.

scholarly journals Growth of Ag-Nanoparticles: Shape-Directing Role of Silver Ions and Stabilizer in Aqueous Solutions

2010 ◽  
Vol 6 (3) ◽  
pp. 1049-1058
Author(s):  
Zoya Zaheer ◽  
Rafiuddin Rafiuddin
Keyword(s):  
Silver Nanoparticles ◽  
Optical Properties ◽  
Ag Nanoparticles ◽  
Cetyltrimethylammonium Bromide ◽  
Silver Ions ◽  
Average Diameter ◽  
Capping Agent ◽  
Transmission Electron ◽  
Uv Visible

Silver nanoparticles were synthesized using Tulsi leaves extract as reducing as well as a capping agent to reduce the steps and parameters involved in the synthesis. The morphology, stability and optical properties of Ag-nanoparticles depend on reactants and stabilizer, cetyltrimethylammonium bromide (CTAB) concentrations. The silver nanoparticles were characterized by UV-visible spectrophotometer, and transmission electron microscope (TEM). Spherical morphology of the silver nanoparticles with an average diameter of  25 nm. Morphology changed markedly from spherical aggregated to highly polydispersed in presence of CTAB.

Facile in situ synthesis of silver nanoparticles on boron nitride nanosheets with enhanced catalytic performance

2015 ◽  
Vol 3 (32) ◽  
pp. 16663-16669 ◽  
Author(s):  
Heng Shen ◽  
Chunting Duan ◽  
Jing Guo ◽  
Ning Zhao ◽  
Jian Xu
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Boron Nitride ◽  
Ag Nanoparticles ◽  
Catalytic Performance ◽  
In Situ Synthesis ◽  
Boron Nitride Nanosheets ◽  
Fe Complex

Ag nanoparticles are in situ decorated on a BNNS modified with a TA–Fe complex, and the nanohybrids show excellent catalytic activity.

Core–shell Co@SiO2 nanosphere immobilized Ag nanoparticles for hydrogen evolution from ammonia borane

RSC Advances ◽  
2016 ◽  
Vol 6 (92) ◽  
pp. 89450-89456 ◽  
Author(s):  
Qilu Yao ◽  
Zhang-Hui Lu ◽  
Yujuan Hu ◽  
Xiangshu Chen
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Ag Nanoparticles ◽  
Ammonia Borane ◽  
Core Shell ◽  
Hydrolysis Of

Silver nanoparticles anchored on core–shell Co@SiO2 nanospheres (Co@SiO2/Ag) have been facilely prepared by using an in situ generated approach, and exhibited higher catalytic activity than their monometallic counterparts for the hydrolysis of AB.

Synthesis, stabilization, growth behavior, and catalytic activity of highly concentrated silver nanoparticles using a multifunctional polymer in an aqueous-phase

RSC Advances ◽  
2015 ◽  
Vol 5 (36) ◽  
pp. 28652-28661 ◽  
Author(s):  
Aasim Shahzad ◽  
Woo-Sik Kim ◽  
Taekyung Yu
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Aqueous Phase ◽  
Ag Nanoparticles ◽  
Growth Behavior ◽  
Term Stability ◽  
Long Term Stability

Highly concentrated Ag nanoparticles (above 20 g L−1) synthesized by the reaction AgNO3 with BPEI exhibited long-term stability over more than 40 days.

Effect of hybrid SiO2@Ag nanoparticles with raspberry-like morphology on the excited states of the photosensitizers Rose Bengal and riboflavin

2019 ◽  
Vol 43 (23) ◽  
pp. 9123-9133 ◽  
Author(s):  
Joaquín E. Martínez Porcel ◽  
María Belén Rivas Aiello ◽  
Valeria B. Arce ◽  
Desire Di Silvio ◽  
Sergio E. Moya ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Charge Transfer ◽  
Triplet State ◽  
Excited States ◽  
Transfer Process ◽  
Rose Bengal ◽  
Ag Nanoparticles ◽  
Charge Transfer Process ◽  
A Charge

Ag+ is released due to a charge transfer process from the triplet state of adsorbed riboflavin to the silver nanoparticles.

Sign in / Sign up

Export Citation Format

Share Document