Highly Efficient Decomposition of Organic Dye by Aqueous-Solid Phase Transfer and In Situ Photocatalysis Using Hierarchical Copper Phthalocyanine Hollow Spheres

2011 ◽  
Vol 3 (7) ◽  
pp. 2573-2578 ◽  
Author(s):  
Mingyi Zhang ◽  
Changlu Shao ◽  
Zengcai Guo ◽  
Zhenyi Zhang ◽  
Jingbo Mu ◽  
...  
Keyword(s):  
Copper Phthalocyanine ◽  
Phase Transfer ◽  
Solid Phase ◽  
Hollow Spheres ◽  
Organic Dye ◽  
Highly Efficient

In Situ Synthesis of Copper Phthalocyanine Modified Multiwalled Carbon Tube and its Electrocatalytic Application towards the Oxidation of Nitrite

2014 ◽  
Vol 938 ◽  
pp. 40-45 ◽  
Author(s):  
K.N. Porchelvi ◽  
S. Meenakshi ◽  
Kanniyan Pandian
Keyword(s):  
Copper Phthalocyanine ◽  
Solid Phase ◽  
Synthesis Method ◽  
Food Samples ◽  
Ammonium Molybdate ◽  
Molar Ratio ◽  
Metal Phthalocyanine ◽  
X Ray Diffraction ◽  
Multiwalled Carbon

We have synthesized metal phthalocyanine modified multiwalled carbon nanotube by a solid-phase synthesis method by heating a reaction mixture of phthalic anhydride, ammonium molybdate and MWCNT in a required molar ratio using muffle furnace. The metal phthalocyanine modified MWCNT samples collected and then washed extensively with various solvents to removal all impurities and unreacted starting materials. The resulting nanocomposite was characterized by IR, UV-Visible spectroscopy, Scanning Electron Microscopy, X-ray diffraction and Raman spectroscopy. The nanostructure of the CuPc/MWCNT assembly exhibits a homogeneous nanocomposite. The electrocatalytic study of the CuPc/MWCNT assembly towards the oxidation of nitrite was investigated. An enhanced oxidation peak current was noted with lowering oxidation over potential ranges. The proposed method can be applied for the amperometry detection of nitrite present in food samples.

scholarly journals Biomolecule-assisted synthesis of defect-mediated Cd1−xZnxS/MoS2/graphene hollow spheres for highly efficient hydrogen evolution

2016 ◽  
Vol 18 (24) ◽  
pp. 16208-16215 ◽  
Author(s):  
Ruifeng Du ◽  
Yihe Zhang ◽  
Baoying Li ◽  
Xuelian Yu ◽  
Huijuan Liu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Hollow Spheres ◽  
Highly Efficient

The in situ formation of defect-rich MoS2 cocatalysts exhibited a significant impact on the photocatalytic activity of Cd1−xZnxS/MoS2/graphene hollow spheres.

Thermoregulated phase transfer catalysis in aqueous/organic biphasic system: facile and highly efficient ATRP catalyst separation and recycling in situ using typical alkyl halide as initiator

2015 ◽  
Vol 6 (35) ◽  
pp. 6394-6401 ◽  
Author(s):  
Xiaowu Jiang ◽  
Yanjing Luo ◽  
Zhen Li ◽  
Lifen Zhang ◽  
Zhenping Cheng ◽  
...  
Keyword(s):  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Alkyl Halide ◽  
Biphasic System ◽  
Metal Catalyst ◽  
Highly Efficient ◽  
Important Development ◽  
Catalyst Separation ◽  
First Time

An important development of TRPTC-based ICAR ATRP for metal catalyst separation and recycling in an aqueous/organic biphasic system was achieved with alkyl halide as the initiator for the first time.

A highly efficient in situ N-acetylation approach for solid phase synthesis

2014 ◽  
Vol 12 (12) ◽  
pp. 1879-1884 ◽  
Author(s):  
Koushik Chandra ◽  
Tapta Kanchan Roy ◽  
Johnny N. Naoum ◽  
Chaim Gilon ◽  
R. Benny Gerber ◽  
...  
Keyword(s):  
Solid Phase Synthesis ◽  
Solid Phase ◽  
Phase Synthesis ◽  
Highly Efficient

In situ peptide acetylation.

Morphology, composition and selectivity of nickel/titanium oxide nanoflakes grown on a superelastic nickel/titanium alloy fiber substrate for highly efficient solid-phase microextraction of aromatic compounds

2019 ◽  
Vol 11 (9) ◽  
pp. 1237-1247
Author(s):  
Junliang Du ◽  
Feifei Wang ◽  
Zhuo Wang ◽  
Xuemei Wang ◽  
Xinzhen Du
Keyword(s):  
Titanium Alloy ◽  
Titanium Oxide ◽  
Aromatic Compounds ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Nickel Titanium ◽  
Hydrothermal Growth ◽  
Highly Efficient

Direct in situ hydrothermal growth of nickel/titanium oxide nanoflakes was carried out on superelastic nickel/titanium alloy wires for solid-phase microextraction.

Dynamic studies of silicide-mediated crystallization of amorphous silicon

1992 ◽  
Vol 50 (2) ◽  
pp. 1352-1353
Author(s):  
C. Hayzelden ◽  
J. L. Batstone
Keyword(s):  
Ion Implantation ◽  
Solid Phase ◽  
Metallic Phase ◽  
Single Crystal Substrate ◽  
Free Electrons ◽  
Melt Temperature ◽  
Transmission Electron ◽  
Crystal Substrate ◽  
High Resolution Tem

Epitaxial reordering of amorphous Si(a-Si) on an underlying single-crystal substrate occurs well below the melt temperature by the process of solid phase epitaxial growth (SPEG). Growth of crystalline Si(c-Si) is known to be enhanced by the presence of small amounts of a metallic phase, presumably due to an interaction of the free electrons of the metal with the covalent Si bonds near the growing interface. Ion implantation of Ni was shown to lower the crystallization temperature of an a-Si thin film by approximately 200°C. Using in situ transmission electron microscopy (TEM), precipitates of NiSi2 formed within the a-Si film during annealing, were observed to migrate, leaving a trail of epitaxial c-Si. High resolution TEM revealed an epitaxial NiSi2/Si(l11) interface which was Type A. We discuss here the enhanced nucleation of c-Si and subsequent silicide-mediated SPEG of Ni-implanted a-Si.Thin films of a-Si, 950 Å thick, were deposited onto Si(100) wafers capped with 1000Å of a-SiO2. Ion implantation produced sharply peaked Ni concentrations of 4×l020 and 2×l021 ions cm−3, in the center of the films.

Solid Phase Excitation-Emission Matrix Spectroscopy for In-Situ Chemical Analysis of Combustion Aerosols

2020 ◽  
Author(s):  
Gaurav Mahamuni ◽  
Jiayang He ◽  
Jay Rutherford ◽  
Byron Ockerman ◽  
Edmund Seto ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Cigarette Smoke ◽  
Forest Fires ◽  
Solid Phase ◽  
Incident Angle ◽  
Personal Exposure ◽  
Traffic Emission ◽  
Excitation Emission Matrix ◽  
Internal Excitation

<p>Exposure to combustion generated aerosols such as PM from residential woodburning, forest fires, cigarette smoke, and traffic emission have been linked to adverse health outcomes. It is important to assess the chemical composition of PM to examine personal exposure. Excitation-emission matrix (EEM) spectroscopy has been shown as a sensitive and cost-effective technique for evaluation of combustion PM composition and as a source apportionment tool. However, EEM measurements are hindered by a solvent extraction step and a need for benchtop instrumentation. Here, we present a methodology that eliminates this labor-intensive sample preparation and allows to automate and miniaturize the detection platform. A miniature electrostatic collector deposits PM sample onto transparent polydimethylsiloxane (PDMS) coated substrate, where PAH components are extracted into solid-phase (SP) solvent and analyzed using EEM spectroscopy in-situ. We evaluated external and internal excitation schemes to optimized signal to noise ratio. Analysis of woodsmoke and cigarette smoke samples showed good agreement with liquid extraction EEM spectra. Internal excitation is hindered by fluorescent interference from PDMS at λ<250nm. The external excitation EEM spectra are dependent on the incident angle; ranges of 30-40⁰ and 55-65⁰ showed the best results. The proposed SP-EEM technique can be used for development of miniaturized sensors for chemical analysis of combustion generated PM. </p>

Growth of Epitaxial IrSi3 Layers on Si(111)

1989 ◽  
Vol 160 ◽  
Author(s):  
T. L. Lin ◽  
C. W. Nieh
Keyword(s):  
Surface Morphology ◽  
Molecular Beam ◽  
Solid Phase ◽  
Single Mode ◽  
Growth Conditions ◽  
Tem Analysis ◽  
Mbe Growth ◽  
Good Surface ◽  
Transmission Electron

AbstractEpitaxial IrSi3 films have been grown on Si (111) by molecular beam epitaxy (MBE) at temperatures ranging from 630 to 800 °C and by solid phase epitaxy (SPE) at 500 °C. Good surface morphology was observed for IrSi3 layers grown by MBE at temperatures below 680 °C, and an increasing tendency to form islands is noted in samples grown at higher temperatures. Transmission electron microscopy (TEM) analysis reveals that the IrSi3 layers grow epitaxially on Si(111) with three epitaxial modes depending on the growth conditions. For IrSi3 layers grown by MBE at 630 °C, two epitaxial modes were observed with ~ 50% area coverage for each mode. Single mode epitaxial growth was achieved at a higher MBE growth temperature, but with island formation in the IrSi3 layer. A template technique was used with MBE to improve the IrSi3 surface morphology at higher growth temperatures. Furthermore, single-crystal IrSi3 was grown on Si(111) at 500 °C by SPE, with annealing performed in-situ in a TEM chamber.

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