Catalytic oxidation of diorganosilanes to 1,1,3,3-tetraorganodisiloxanes with gold nanoparticle assembly at the water–chloroform interface

2019 ◽  
Vol 43 (2) ◽  
pp. 813-819 ◽  
Author(s):  
Ravi Shankar ◽  
Asmita Sharma ◽  
Bhawana Jangir ◽  
Manchal Chaudhary ◽  
Gabriele Kociok-Köhn
Keyword(s):  
Catalytic Activity ◽  
Ambient Temperature ◽  
Catalytic Oxidation ◽  
Gold Nanoparticle ◽  
Photothermal Effect ◽  
Nanoparticle Assembly

The synthesis of 1,1,3,3-tetraorganodisiloxanes from the hydrolytic oxidation of diorganosilanes, RR1SiH2, using AuNPs as an interfacial catalyst is described. This study provides a manifestation of the photothermal effect in enhancing the catalytic activity at ambient temperature.

Protein-Induced Gold Nanoparticle Assembly for Improving the Photothermal Effect in Cancer Therapy

2019 ◽  
Vol 11 (12) ◽  
pp. 11136-11143 ◽  
Author(s):  
Jie Wang ◽  
Ying Zhang ◽  
Na Jin ◽  
Chuanbin Mao ◽  
Mingying Yang
Keyword(s):  
Cancer Therapy ◽  
Gold Nanoparticle ◽  
Photothermal Effect ◽  
Nanoparticle Assembly

scholarly journals A new highly active La2O3–CuO–MgO catalyst for the synthesis of cumyl peroxide by catalytic oxidation

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12532-12542
Author(s):  
HanShuang Liu ◽  
KaiJun Wang ◽  
XiaoYan Cao ◽  
JiaXin Su ◽  
Zhenggui Gu
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Highly Active

The La2O3–CuO–MgO catalyst acts on the oxidation of cumene and shows excellent catalytic activity through the coordination of surface and interior.

Bimetallic Nanostructures as Active Raman Markers: Gold-Nanoparticle Assembly on 1D and 2D Silver Nanostructure Surfaces

Small ◽  
2009 ◽  
Vol 5 (21) ◽  
pp. 2460-2466 ◽  
Author(s):  
Ray Gunawidjaja ◽  
Eugenia Kharlampieva ◽  
Ikjun Choi ◽  
Vladimir V. Tsukruk
Keyword(s):  
Gold Nanoparticle ◽  
Nanoparticle Assembly ◽  
Silver Nanostructure ◽  
Bimetallic Nanostructures

scholarly journals Low platinum alloy catalyst PtCo3 obtaining high catalytic activity and stability with great water and CO2 resistance for catalytic oxidation of toluene

Fuel ◽  
2022 ◽  
Vol 307 ◽  
pp. 121794
Author(s):  
Jianwu Zou ◽  
Yankun Du ◽  
Rongjia Fang ◽  
Xiaoshuang Duan ◽  
Yangjia Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
High Catalytic Activity ◽  
Platinum Alloy ◽  
Alloy Catalyst

Synthesis and Catalytic Activity Studies of V/K/Ca and V/Ks/Ce Based Catalysts for Diesel Soot Oxidation

2007 ◽  
Vol 336-338 ◽  
pp. 1995-1998
Author(s):  
Yong Heng Zhang ◽  
Jian Zhong Xue
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Amorphous Phase ◽  
Porous Alumina ◽  
Soot Oxidation ◽  
Diesel Soot ◽  
Oxidation Activity ◽  
Diesel Soot Oxidation ◽  
Oxidation Onset Temperature ◽  
Catalyst Systems

The catalysts based on V/K/Ca and V/Ks/Ce systems for diesel soot catalytic oxidation were synthesized onto the porous alumina substrates. Both catalyst systems showed a good catalytic oxidation activity. The V/K/Ca system exhibited the lowest oxidation onset temperature (OOT) of about 359oC with a composition of V/K/Ca =1:1:0.1 where the V and Ca and/or K elements could form a kind of amorphous phase that determined the catalytic activity. The V/Ks/Ce system displayed the lowest OOT of about 350oC with a composition of V/Ks/Ce = 1:2:0.1 where the K2SO4 and K5V2O3(SO4)4 phases could contribute most to the catalytic activity.

Simultaneous identification of point mutations via DNA ligase-mediated gold nanoparticle assembly

The Analyst ◽  
2008 ◽  
Vol 133 (7) ◽  
pp. 939 ◽  
Author(s):  
Jishan Li ◽  
Jian-Hui Jiang ◽  
Xiang-Min Xu ◽  
Xia Chu ◽  
Cheng Jiang ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Point Mutations ◽  
Dna Ligase ◽  
Nanoparticle Assembly ◽  
Simultaneous Identification

scholarly journals Catalytic Oxidation of Chlorobenzene over Pd-TiO2 /Pd-Ce/TiO2 Catalysts

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 347 ◽  
Author(s):  
Wenjun Liang ◽  
Xiaoyan Du ◽  
Yuxue Zhu ◽  
Sida Ren ◽  
Jian Li
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Calcination Temperature ◽  
Catalyst Activity ◽  
Space Velocity ◽  
Impregnation Method ◽  
Tio2 Catalyst ◽  
Metal Support ◽  
Oxidation Efficiency

A series of Pd-TiO2/Pd-Ce/TiO2 catalysts were prepared by an equal volume impregnation method. The effects of different Pd loadings on the catalytic activity of chlorobenzene (CB) were investigated, and the results showed that the activity of the 0.2%-0.3% Pd/TiO2 catalyst was optimal. The effect of Ce doping enhanced the catalytic activity of the 0.2% Pd-0.5% Ce/TiO2 catalyst. The characterization of the catalysts using BET, TEM, H2-TPR, and O2-TPD showed that the oxidation capacity was enhanced, and the catalytic oxidation efficiency was improved due to the addition of Ce. Ion chromatography and Gas Chromatography-Mass Spectrometer results showed that small amounts of dichlorobenzene (DCB) and trichlorobenzene (TCB) were formed during the decomposition of CB. The results also indicated that the calcination temperature greatly influenced the catalyst activity and a calcination temperature of 550 °C was the best. The concentration of CB affected its decomposition, but gas hourly space velocity had little effect. H2-TPR indicated strong metal–support interactions and increased dispersion of PdO in the presence of Ce. HRTEM data showed PdO with a characteristic spacing of 0.26 nm in both 0.2% Pd /TiO2 and 0.2% Pd-0.5% Ce/TiO2 catalysts. The average sizes of PdO nanoparticles in the 0.2% Pd/TiO2 and 0.2% Pd-0.5% Ce/TiO2 samples were 5.8 and 4.7 nm, respectively. The PdO particles were also deposited on the support and they were separated from each other in both catalysts.

scholarly journals Plasmon-Enhanced Photothermal and Optomechanical Deformations of a Gold Nanoparticle

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1881
Author(s):  
Jiunn-Woei Liaw ◽  
Guanting Liu ◽  
Yun-Cheng Ku ◽  
Mao-Kuen Kuo
Keyword(s):  
Gold Nanoparticle ◽  
Liquid Layer ◽  
Viscoelastic Model ◽  
Dynamics Simulation ◽  
Photothermal Effect ◽  
Continuous Heating ◽  
Heating Process ◽  
Elastic Model ◽  
Linearly Polarized ◽  
Quasi Liquid Layer

Plasmon-enhanced photothermal and optomechanical effects on deforming and reshaping a gold nanoparticle (NP) are studied theoretically. A previous paper (Wang and Ding, ACS Nano 13, 32–37, 2019) has shown that a spherical gold nanoparticle (NP) irradiated by a tightly focused laser beam can be deformed into an elongated nanorod (NR) and even chopped in half (a dimer). The mechanism is supposed to be caused by photothermal heating for softening NP associated with optical traction for follow-up deformation. In this paper, our study focuses on deformation induced by Maxwell’s stress provided by a linearly polarized Gaussian beam upon the surface of a thermal-softened NP/NR. We use an elastic model to numerically calculate deformation according to optical traction and a viscoelastic model to theoretically estimate the following creep (elongation) as temperature nears the melting point. Our results indicate that a stretching traction at the two ends of the NP/NR causes elongation and a pinching traction at the middle causes a dent. Hence, a bigger NP can be elongated and then cut into two pieces (a dimer) at the dent due to the optomechanical effect. As the continuous heating process induces premelting of NPs, a quasi-liquid layer is formed first and then an outer liquid layer is induced due to reduction of surface energy, which was predicted by previous works of molecular dynamics simulation. Subsequently, we use the Young–Laplace model to investigate the surface tension effect on the following deformation. This study may provide an insight into utilizing the photothermal effect associated with optomechanical manipulation to tailor gold nanostructures.

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