In Situ One-Step Method for Preparing Carbon Nanotubes and Pt Composite Catalysts and Their Performance for Methanol Oxidation

2007 ◽  
Vol 111 (30) ◽  
pp. 11174-11179 ◽  
Author(s):  
Shu-Fa Zheng ◽  
Jin-Song Hu ◽  
Liang-Shu Zhong ◽  
Li-Jun Wan ◽  
Wei-Guo Song
Keyword(s):  
Carbon Nanotubes ◽  
Methanol Oxidation ◽  
Step Method ◽  
Composite Catalysts ◽  
One Step

scholarly journals Flame-Retardant and Smoke Suppression Properties of Nano MgAl-LDH Coating on Bamboo Prepared by an In Situ Reaction

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Xiaoling Yao ◽  
Chungui Du ◽  
Yating Hua ◽  
Jingjing Zhang ◽  
Rui Peng ◽  
...  
Keyword(s):  
Reaction Time ◽  
Flame Retardant ◽  
Building Materials ◽  
Reaction Times ◽  
Step Method ◽  
In Situ Reaction ◽  
One Step ◽  
Double Hydroxide ◽  
Optimal Reaction

In recent years, bamboo has been widely used for building materials and household goods. However, bamboo is flammable, so a flame-retardant treatment for bamboo is urgently needed. In this work, nano MgAl-layered double hydroxide (MgAl-LDH) coated on bamboo, which was called MgAl-LB, was synthesized by an in situ one-step method. To determine the optimal in situ time, the effects of different reaction times on LDH growth on the bamboo surface and the flame retardancy of the MgAl-LBs were investigated. The SEM observations show that LDH growth on the surface of bamboo was basically saturated when the in situ reaction time was 24 h. Abrasion experiments show that MgAl-LDH coating has good abrasion resistance. The fire performance of the MgAl-LBs was evaluated by cone calorimeter tests, which indicated that the THR and TSP of the MgAl-LBs were significantly lower than those of untreated bamboo. Taking into account the energy consumption problem, determining the reaction time of 24 h is the optimal reaction time. Compared with untreated bamboo, the THR and TSP of MgAl-LB prepared at 24 h decreased by 33.3% and 88.9%, respectively.

Growth and Characterization of Cobalt-filled Carbon Nanotubes Prepared by a Simple Catalytic Method

2003 ◽  
Vol 776 ◽  
Author(s):  
Xicheng Ma ◽  
Yuanhua Cai ◽  
Xia Li ◽  
Ning Lun ◽  
Shulin Wen
Keyword(s):  
Carbon Nanotubes ◽  
Metallic Nanoparticles ◽  
Low Cost ◽  
Catalytic Method ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
High Resolution Tem ◽  
One Step

AbstractHigh-quality cobalt-filled carbon nanotubes (CNTs) were prepared in situ in the decomposition of benzene over Co/silica-gel nano-scale catalysts. Unlike the previous reports, the catalysts needn't be pre-reduced prior to the forming of Co-filled CNTs, thus the advantage of this method is that Co-filled CNTs can be produced in one step, at a relatively low cost. Transmission electron microscopy (TEM) investigation showed that the products contained abundance of CNTs and most of them were filled with metallic nanoparticles or nanorods. High-resolution TEM (HRTEM), selected area electron diffraction (SAED) patterns and energy dispersive X-ray spectroscopy (EDS) confirmed the presence of Co inside the nanotubes. The encapsulated Co was further identified always as high temperature alpha-Co phase with fcc structure, which frequently consists of twinned boundaries and stacking faults. Based on the experimental results, a possible growth mechanism of the Co-filled CNTs was proposed.

The hydrothermal in situ construction of AgVO3/LaVO4 phase junctions for the efficient visible-light-driven disposal of pollutants and photoelectrocatalytic methanol oxidation

2020 ◽  
Vol 4 (5) ◽  
pp. 2569-2582
Author(s):  
Xiaoxiao Li ◽  
Kailian Zhang ◽  
Man Zhou ◽  
Kai Yang ◽  
Laixi Zou ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrothermal Method ◽  
Methanol Oxidation ◽  
Organic Pollutant ◽  
Facile Hydrothermal Method ◽  
Photoelectrocatalytic Oxidation ◽  
Oxidation Of Methanol ◽  
Visible Light Driven ◽  
One Step

The β-AgVO3/LaVO4 heterojunctions were synthesized via a one-step facile hydrothermal method, which exhibited excellent performances for degradation of organic pollutant in wastewater and photoelectrocatalytic oxidation of methanol.

Preparation and Thermal Performance of Fluorinated Carbon Nanotubes/Thermoplastic Polyurethane Nanocomposites

2014 ◽  
Vol 687-691 ◽  
pp. 4273-4276
Author(s):  
Li Dai ◽  
Run Ping Jia ◽  
Xin Yao He ◽  
Mao Song Huang
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Resistance ◽  
Thermoplastic Polyurethane ◽  
Bulk Polymerization ◽  
Degradation Temperature ◽  
Plasma Grafting ◽  
One Step ◽  
New Type ◽  
Fluorinated Carbon

To achieve well dispersion of carbon nanotubes (CNTs) and increase the interactions between CNTs and thermoplastics polyurethane (TPU) matrix,a new type of fluorinated carbon nanotube (f-CNT) was modified by fluorine plasma grafting with fluoropolymer. A series of f-CNTs/TPU nanocomposites were prepared by one-step in situ bulk polymerization method. The morphology, thermal property and chemical resistance of nanocomposites were characterized and compared. Results indicated thermal degradation temperature was largely increased and the glass-transition temperature increased from-51.7°C to-42.3°C. Moreover, the chemical resistance was apparent improved.

IN SITU UNZIPPING OF CARBON NANOTUBES TO FORM GRAPHENE NANORIBBONS

NANO ◽  
2014 ◽  
Vol 09 (01) ◽  
pp. 1450010 ◽  
Author(s):  
YONG-SHENG ZHOU ◽  
PAN JIN ◽  
TENG GUO ◽  
YING-CHUN ZHU ◽  
GAO-HUI DU ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Nanoribbons ◽  
Average Length ◽  
Chemical Vapor ◽  
Chemical Vapor Deposition Method ◽  
Alternative Approach ◽  
Simple Chemical ◽  
One Step ◽  
The One

We report the one step facile synthesis of graphene nanoribbons (GNRs) by unzipping carbon nanotubes (CNTs) from glucose ( C 6 H 12 O 6) precursor, using a simple chemical vapor deposition method. Some nanotubes are partially cut resulting in a GNR–CNT hybrid whereas others are fully cut to form GNRs. The average length of GNRs achieved by this method is typically in the range of 1–10 μm. The formation of GNRs is ascribed to the in situ oxygen-driven unzipping of CNTs. The process is free from aggressive oxidants and utilizes the in situ unzipping. This method offers an alternative approach for making GNRs, compared to previously used techniques to synthesize GNRs.

Facile hydrothermal synthesis of CuO–Cu2O/GO nanocomposites for the photocatalytic degradation of organic dye and tetracycline pollutants

2020 ◽  
Vol 44 (16) ◽  
pp. 6420-6427 ◽  
Author(s):  
Zhuanfang Zhang ◽  
Li Sun ◽  
Zhaojun Wu ◽  
Yongzhi Liu ◽  
Shaobin Li
Keyword(s):  
Hydrothermal Synthesis ◽  
Photocatalytic Degradation ◽  
Organic Dye ◽  
Step Method ◽  
Photocatalytic Mechanism ◽  
One Step

A bifunctional nanoscale photocatalyst was constructed by developing a one-step method for the in situ growth of CuO–Cu2O nanoparticles on GO sheets, and the photocatalytic mechanism was inferred.

Synthesis of Hydroxyapatite in Polymeric Solutions for Organic-Inorganic Nanocomposites

2007 ◽  
Vol 330-332 ◽  
pp. 427-430
Author(s):  
Gui Qiu Zheng ◽  
Xu Dong Li ◽  
Xiao Min Wang ◽  
Su Hong Yu ◽  
Zhong Wei Gu ◽  
...  
Keyword(s):  
Poly Vinyl Alcohol ◽  
Organic Template ◽  
Step Method ◽  
Organic Species ◽  
One Step ◽  
Acid Aqueous Solution ◽  
Inorganic Nanocomposites ◽  
Polymeric Solutions ◽  
Organic Solutions

Synthesis of hydroxyapatite (HA) in organic solutions has received extensive attention in recent years with an attempt to obtain HA of a nanometer level. In this preliminary study, we demonstrated that organic-HA nanocomposites could also be achieved with one step method via in situ mineralization and subsequent crosslinking of organic species. This design was realized through in situ synthesis of hydroxyapatite in poly(vinyl alcohol) and acrylic acid aqueous solution as an organic template. The aforementioned organic-inorganic nanocomposites were analyzed by using X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electrical microscopy, thermal analysis. The comparative structural measurements were also conducted with the synthesized HA with absence of the organic template. The results indicated that the existence of organic species effectively inhibits the growth of calcium phosphate and that relatively pure HA can be obtained in sintered composite products. The present study provides a direct and versatile route for fabrication of nanocomposite biomaterials.

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