Controlled Synthesis of Cobalt Flowerlike Architectures by a Facile Hydrothermal Route

2008 ◽  
Vol 2008 (17) ◽  
pp. 2733-2738 ◽  
Author(s):  
Ya-jing Zhang ◽  
Ying Zhang ◽  
Zhen-hua Wang ◽  
Da Li ◽  
Tie-yu Cui ◽  
...  
Keyword(s):  
Controlled Synthesis ◽  
Hydrothermal Route ◽  
Facile Hydrothermal Route

Morphology-tunable synthesis of ZnO nanoforest and its photoelectrochemical performance

Nanoscale ◽  
2014 ◽  
Vol 6 (15) ◽  
pp. 8769-8780 ◽  
Author(s):  
Xing Sun ◽  
Qiang Li ◽  
Jiechao Jiang ◽  
Yuanbing Mao
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Controlled Synthesis ◽  
Zno Nanostructures ◽  
Photoelectrochemical Performance ◽  
Hydrothermal Route ◽  
Facile Hydrothermal Route ◽  
Architectural Characteristics

The morphology-controlled synthesis of ZnO nanoforests is achieved via a facile hydrothermal route based on the respective and synergistic influence of polyethylenimine (PEI) and ammonia. More importantly, the unique architectural characteristics endow the willow-like ZnO nanoforest with prominent photoelectrochemical water splitting performance, which leads to the realm of homogeneous ZnO nanostructures.

scholarly journals Controlled Synthesis of Manganese Dioxide Nanostructures via a Facile Hydrothermal Route

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Suh Cem Pang ◽  
Suk Fun Chin ◽  
Chian Ye Ling
Keyword(s):  
Phase Transformation ◽  
Manganese Dioxide ◽  
Structural Evolution ◽  
Controlled Synthesis ◽  
Hydrothermal Route ◽  
Hydrothermal Aging ◽  
Synthesis Parameters ◽  
Facile Hydrothermal Route ◽  
Lower Temperature ◽  
And Control

Manganese dioxide nanostructures with controllable morphological structures and crystalline phases were synthesized via a facile hydrothermal route at low temperatures without using any templates or surfactants. Both the aging duration and aging temperatures were the main synthesis parameters used to influence and control the rate of morphological and structural evolution of MnO2nanostructures. MnO2nanostructures comprise of spherical nanoparticulate agglomerates and highly amorphous in nature were formed at lower temperature and/or short aging duration. In contrast, MnO2nanostructures of sea-urchin-like and nanorods-like morphologies and nanocrystalline in nature were prepared at the combined higher aging temperatures and longer aging durations. These nanostructures underwent notable phase transformation from δ-MnO2to α-MnO2upon prolonged hydrothermal aging duration and exhibited accelerated rate of phase transformation at higher aging temperature.

scholarly journals Facile hydrothermal route to the controlled synthesis of α-Fe2O3 1-D nanostructures

2008 ◽  
Vol 31 (7) ◽  
pp. 919-923 ◽  
Author(s):  
Lixia Yang ◽  
Ying Liang ◽  
Hou Chen ◽  
Lingyan Kong ◽  
Wei Jiang
Keyword(s):  
Controlled Synthesis ◽  
Hydrothermal Route ◽  
Facile Hydrothermal Route

In situ controlled synthesis of various TiO2 nanostructured materials via a facile hydrothermal route

2010 ◽  
Vol 13 (5) ◽  
pp. 1855-1863 ◽  
Author(s):  
Hai Wang ◽  
Yong Liu ◽  
Minyi Zhong ◽  
Hongmei Xu ◽  
Hong Huang ◽  
...  
Keyword(s):  
Nanostructured Materials ◽  
Controlled Synthesis ◽  
Hydrothermal Route ◽  
Facile Hydrothermal Route

PEG-Assisted Hydrothermal Synthesis and Photocatalytic Activity of Bi2Fe4O9 Crystallites

2011 ◽  
Vol 1292 ◽  
Author(s):  
Dengrong Cai ◽  
Jianmin Li ◽  
Shundong Bu ◽  
Shengwen Yu ◽  
Dengren Jin ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Diffuse Reflectance Spectrum ◽  
X Ray Diffraction ◽  
Hydrothermal Route ◽  
Peg 400 ◽  
Transmission Electron ◽  
Light Region ◽  
Facile Hydrothermal Route ◽  
Degradation Ratio

ABSTRACTA facile hydrothermal route assisted by polyethylene glycol (PEG) 400 was utilized to synthesize single-phase Bi2Fe4O9 crystallites. X-ray diffraction results showed the products with PEG 400 of 30 g/L exhibited a preferred growth along the (001) plane. Transmission electron microscopy indicated that the morphology of the as-prepared Bi2Fe4O9 crystallites with PEG 400 were plake-like and rod-like. Strong absorption in visible-light region of the products was characterized by UV-vis diffuse reflectance spectrum (UV-DRS). The photocatalytic activity of Bi2Fe4O9 crystallites was evaluated on degradation of methyl orange (MO) under visible light irradiation. For 3 h irradiation, the degradation ratio was increased to 93% with the aid of a small amount of H2O2. The analysis of FT-IR spectra proved that the Bi2Fe4O9 catalysts were remained stable after the photocalytic reactions.

Effect of hydrothermal dwell time on the diameter-controlled synthesis and magnetic property of MnO2 nanorods

2014 ◽  
Vol 28 (06) ◽  
pp. 1450045 ◽  
Author(s):  
Arbab Mohammad Toufiq ◽  
Fengping Wang ◽  
Qurat-ul-Ain Javed ◽  
Yan Li
Keyword(s):  
Electron Microscopy ◽  
Reaction Time ◽  
Dwell Time ◽  
Hydrothermal Reaction ◽  
Ferromagnetic Behavior ◽  
X Ray Diffraction ◽  
Hydrothermal Route ◽  
Transmission Electron ◽  
Facile Hydrothermal Route ◽  
Hydrothermal Reaction Time

In this paper, single crystalline 1D tetragonal MnO 2 pen-type nanorods were synthesized by varying the dwell time through a facile hydrothermal route at a reaction temperature of 250°C. X-ray diffraction (XRD) and transmission electron microscopy (TEM) studies showed that the diameter of MnO 2 nanorods decreases from 460 nm to 250 nm with the increase in hydrothermal reaction time from 5 h to 15 h. Field-emission scanning electron microscopy (FESEM) and TEM studies revealed the evolution of improved surface morphology of MnO 2 nanorods that are prepared with longer hydrothermal reaction time. The magnetic properties of the products were evaluated using vibrating sample magnetometer (VSM) at room temperature, which showed that the as-prepared samples exhibit weak ferromagnetic behavior. The effect of diameter on the magnetization values was observed and discussed in detail.

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