Catalytic Applications of Noble Metal Nanoparticles Produced by Sonochemical Reduction of Noble Metal Ions

2015 ◽  
pp. 1-39
Author(s):  
Kenji Okitsu ◽  
Yoshiteru Mizukoshi
Keyword(s):  
Metal Ions ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
Catalytic Applications ◽  
Sonochemical Reduction

Self-assembled calixarene aligned patterning of noble metal nanoparticles on graphene

Nanoscale ◽  
2014 ◽  
Vol 6 (9) ◽  
pp. 4517-4520 ◽  
Author(s):  
Xianjue Chen ◽  
Kasturi Vimalanathan ◽  
Wenzhe Zang ◽  
Ashley D. Slattery ◽  
Ramiz A. Boulos ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Phosphonic Acid ◽  
Hydrogen Gas ◽  
Noble Metal Nanoparticles ◽  
Self Assembled

Patterns of noble metal nanoparticles (NMNPs) of ruthenium and platinum are formed on p-phosphonic acid calix[8]arene stabilized graphene in water with hydrogen gas induced reduction of the metal ions.

Synthesis and characterization of bimetallic noble metal nanoparticles for biomedical applications

MRS Advances ◽  
2016 ◽  
Vol 1 (11) ◽  
pp. 681-691 ◽  
Author(s):  
Prem C. Pandey ◽  
Govind Pandey
Keyword(s):  
Metal Ions ◽  
Prussian Blue ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Time Course ◽  
Bimetallic Nanoparticles ◽  
Reducing Agents ◽  
Noble Metal Nanoparticles ◽  
Ambient Conditions ◽  
Peroxidase Mimetic

ABSTRACTWe report herein a facile approach to synthesize processable bimetallic nanoparticles (Pd-Au/AuPd/Ag-Au/Au-Ag) decorated Prussian blue nanocomposite (PB-AgNP). The presence of cyclohexanone/formaldehyde facilitates the formation of functional bimetallic nanoparticles from 3-aminopropyltrimethoxysilane (3-APTMS) capped desired ratio of hetero noble metal ions. The use of 3-APTMS and cyclohexanone also enables the synthesis of polycrystalline Prussian blue nanoparticles (PBNPs). As synthesized PBNPs, Pd-Au/Au-Pd/Ag-Au/Au-Ag enable the formation of nano-structured composites displaying better catalytic activity than that recorded with natural enzyme. The nanomaterials have been characterized by Uv-Vis, FT-IR and Transmission Electron Microscopy (TEM) with following major findings: (1) 3-APTMS capped noble metal ions in the presence of suitable organic reducing agents i.e.; 3 glycidoxypropyltrimethoxysilane (GPTMS), cyclohexanone and formaldehyde; are converted into respective nanoparticles under ambient conditions, (2) the time course of synthesis and dispersibility of the nanoparticles are found as a function of organic reducing agents, (3) the use of formaldehyde and cyclohexanone in place of GPTMS with 3-APTMS outclasses the other two in imparting better stability of amphiphilic nanoparticles with reduced silanol content, (4) simultaneous synthesis of bimetallic nanoparticles under desired ratio of palladium/gold and silver/ gold cations are recorded, (5) the nanoparticles made from the use of 3-APTMS and cyclohexanone enable the formation of homogeneous nanocomposite with PBNP as peroxidase mimetic representing potential substitute of peroxidase enzyme. The peroxidase mimetic ability has been found to vary as a function of 3-APTMS concentration revealing the potential role of functional metal nanoparticles in bioanalytical applications.

Architecture of yolk–shell structured mesoporous silica nanospheres for catalytic applications

2018 ◽  
Vol 47 (27) ◽  
pp. 9072-9078 ◽  
Author(s):  
Xue Wang ◽  
Yapeng He ◽  
Yali Ma ◽  
Junmin Liu ◽  
Yunling Liu ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Selective Etching ◽  
Noble Metal Nanoparticles ◽  
Silica Nanospheres ◽  
Periodic Mesoporous Organosilica ◽  
Mesoporous Organosilica ◽  
Catalytic Applications ◽  
Mesoporous Silica Nanospheres

We report the design and realization of yolk–shell structured nanospheres with periodic mesoporous organosilica (PMO) nanospheres or noble metal nanoparticles encapsulated in mesoporous silica shellsviaa selective etching method.

Capping agent-free highly dispersed noble metal nanoparticles supported in ordered mesoporous carbon with short channels and their catalytic applications

RSC Advances ◽  
2016 ◽  
Vol 6 (66) ◽  
pp. 61064-61072 ◽  
Author(s):  
Wenjun Gao ◽  
Siwen Li ◽  
Manas Pal ◽  
Yong Liu ◽  
Xiaoyue Wan ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Mesoporous Carbon ◽  
Ordered Mesoporous Carbon ◽  
Noble Metal Nanoparticles ◽  
Capping Agent ◽  
Ordered Mesoporous ◽  
Highly Dispersed ◽  
Catalytic Applications ◽  
Short Channels

Capping agent free synthesis of noble metal nanoparticles supported on ordered mesoporous carbon with short channels.

Noble metal nanoparticles supported on MOF nanorods and their catalytic applications

2021 ◽  
Author(s):  
Tieyin Shen ◽  
Mingjun Zhong ◽  
Lijuan Feng ◽  
Zhuyin Sui ◽  
Qi Chen
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
Catalytic Applications

Role of organic functionalities linked to alkoxysilane precursors in nanomaterials synthesis and their biomedical applications

2015 ◽  
Vol 1719 ◽  
Author(s):  
P. C. Pandey ◽  
Govind Pandey
Keyword(s):  
Salt Tolerance ◽  
Metal Ions ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Biomedical Applications ◽  
Ph Sensitivity ◽  
Noble Metal Nanoparticles ◽  
Biological Interactions ◽  
Wide Range

ABSTRACTThe synthesis of biocompatible noble metal nanoparticles dispersible in a wide range of biological media with control of polycrystalinity and nanogeometry, pH sensitivity and salt tolerance has been a challenging requirements. The role of 3-aminopropyltrimethoxysilane (3-APTMS) and organic reducing reagents for real time synthesis of amphilic noble metal nanoparticles meeting these requirements are demonstrated justifying the following; (1) 3-APTMS capped noble metal ions are converted into respective metal nanoparticles in the presence of one of organic reducing agents i.e., cyclohexanone, tetrahydrofuran hydroperoxide (THF-HPO), formaldehyde, acetaldehyde, acetone, t-buty dimethyl keotone, 3-Glycidoxy-propyltrimethoxysilane (3-GPTMS); (2) 3-APTMS acts as micelle, promotes the interaction of metal ions with organic reducing agent, precisely controls the size of metal nanoparticles, pH sensititvity and salt tolerance and also provides a suitable medium for nanoparticles suspension, (3) the use of suitable organic reagent precisely controls the polarity of as made noble metal nanoparticles allowing specific biological interactions, and (4) 3-APTMS significantly increases the stability and controls the pH sensitivity and salt tolerance of metal nanoparticles. The as synthesized nanomaterials show potential viability in biomedical applications from many angles i.e. (a) as potential bioelectrocatalyst, (b) selective interaction with active proteins and cellular components, and (c) peroxidase mimetic.

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