scholarly journals Preparation of graphene/Au aerogel film through the hydrothermal process and application for H2O2 detection

RSC Advances ◽  
2019 ◽  
Vol 9 (23) ◽  
pp. 13042-13047
Author(s):  
Ting Shen ◽  
Zhiyong Zhao ◽  
Qishi Zhong ◽  
Yujun Qin ◽  
Pu Zhang ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Hydrothermal Method ◽  
Gold Nanoparticle ◽  
Hydrothermal Process ◽  
H2o2 Detection

Graphene/gold nanoparticle aerogel film was prepared through the hydrothermal method, and could be used as an electrochemical sensor for detecting H2O2.

scholarly journals Hydrothermal Transformation of Natural Zeolite from Ende-NTT and Its Application as Adsorbent of Cationic Dye

2018 ◽  
Vol 16 (2) ◽  
pp. 138 ◽  
Author(s):  
Yulius Dala Ngapa ◽  
Sri Sugiarti ◽  
Zaenal Abidin
Keyword(s):  
Adsorption Capacity ◽  
Hydrothermal Method ◽  
Natural Zeolite ◽  
Hydrothermal Process ◽  
Exchange Capacity ◽  
Synthetic Zeolite ◽  
Crystal Formation ◽  
Isothermal Adsorption ◽  
Hydrothermal Transformation ◽  
Equilibrium Process

A synthetic zeolite was produced from natural zeolite from Ende-Nusa Tenggara Timur (NTT) by hydrothermal method. This study aims to produce synthetic zeolite from Ende natural zeolite to remove cation dye through the adsorption process. Temperature of crystal formation (ageing) was performed at 60 °C for 6 h and hydrothermal process was at 100 °C for 24 h. The natural zeolite produced synthetic NaP1 and synthetic Faujasite. Based on the research results, the synthesis of zeolite by the hydrothermal method can enhance the adsorption capacity and Cation Exchange Capacity (CEC). The adsorption capacity in the natural zeolites of type ZG, ZL and ZC before the hydrothermal process were 17.289, 17.276, and 16.483 mg/g, respectively, and after hydrothermal they increased to 37.398, 37.369 and 37.362 mg/g, respectively. In addition, the CEC increased from 84.154, 81.042, and 77.474 cmol/kg, respectively, to 244.063, 216.354, and 211.432 cmol/kg, respectively. The Langmuir model most closely matched the isothermal adsorption equilibrium process.

Synthesis of PZT Disks by a Hydrothermal Method

2012 ◽  
Vol 174-177 ◽  
pp. 592-595
Author(s):  
Lin Lin Yang ◽  
Yong Gang Wang ◽  
Yu Jiang Wang ◽  
Xiao Feng Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Hydrothermal Method ◽  
Formation Mechanism ◽  
Powder Diffraction ◽  
Self Assembly ◽  
Hydrothermal Process ◽  
X Ray ◽  
Extended Length ◽  
Scanning Electron

The organization of nanostructures across extended length scales is a key challenge in the design of integrated materials with advanced functions. PbZr0.52Ti0.48O3multilayer disks which were constructed by oriented rectangle nanoparticles were easily prepared by a simple surfactant-free hydrothermal process. The as-prepared powders were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The results indicated that the as-prepared PZT disks were constructed by self-assembly of rectangle nanoparticles by a perfect manner. The formation mechanism of the products was discussed.

Synthesis and Oxygen Sensing Properties of Ti1-xSnxO2 Solid Solutions Nanoparticles

2013 ◽  
Vol 575-576 ◽  
pp. 45-49
Author(s):  
Ai Qing Wu ◽  
Xin Zuo Fang ◽  
Xin Hua Lin ◽  
Huan Qin Wang ◽  
Ying Xian Wang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Solid Solutions ◽  
Sol Gel ◽  
Hydrothermal Process ◽  
Typical Sample ◽  
Sol Gel Process ◽  
Crystallite Sizes ◽  
Hybrid Alkoxides ◽  
Xrd And Tem ◽  
High Temperature Calcination

Rutile Ti1xSnxO2(0.2x<1) solid solutions had been prepared using a sol-hydrothermal method, which combined the conventional sol-gel process with hydrothermal method. Hybrid alkoxides of Ti4+and Sn4+were used as precursors in the sol-gel process and Sn4+served as crystal-inducing agent during the formation of rutile crystal lattice in the hydrothermal process at 200°C. The microstructures and morphologies of nanoparticles were detected with XRD and TEM. Rutile Ti1xSnxO2solid solutions nanoparticles with well-distributed crystallite sizes about 10nm were obtained with Sn4+content above 20mol% without any high temperature calcination. The oxygen sensitivity properties of Ti1xSnxO2solid solutions had also been investigated. It is proved Ti1xSnxO2solid solutions exhibited higher oxygen responses than single TiO2or SnO2. A typical sample of Ti0.5Sn0.5O2presented the best sensitivity is approximately 6 under 400°C.

scholarly journals The nanostructure of barium dititanate prepared by hydrothermal method

2019 ◽  
Vol 09 (02) ◽  
pp. 1950011
Author(s):  
Sarah L. Rasheed ◽  
Emad K. Al-Shakarchi
Keyword(s):  
Electron Microscopy ◽  
Reaction Time ◽  
Hydrothermal Method ◽  
Ph Value ◽  
Hydrothermal Process ◽  
Dielectric Ceramic ◽  
Lattice Constants ◽  
Preparation Conditions ◽  
Transmission Electron ◽  
Lcr Meter

The dielectric ceramic of barium dititanate compound BaTi2O5 had been prepared through the hydrothermal process by applying different parameters, such as pH-value, reaction time, temperature and pressure. The prepared powders were examined by X-ray diffraction (XRD). The predominant phase was a monoclinic phase with lattice constants ([Formula: see text], [Formula: see text], [Formula: see text] Å), ([Formula: see text], [Formula: see text]), and the unit cell volume (527 Å3). The surface morphology was demonstrated by Scanning Electron Microscopy (SEM). It exhibited the grains in spherical and elliptical shapes with high homogeneity. The shapes of nanostructure were analyzed by Transmission Electron Microscopy (TEM). The appearance of nanostructures like the nanoparticles and nano rods were found. The size of nanoparticles was in the range of 9–31[Formula: see text]nm, and size of nanorods was 32–37[Formula: see text]nm. The dielectric measurements were done by using LCR meter at different temperature and frequencies (10, 50 and 100[Formula: see text]kHz). It was clear that the Curie temperature had a high value up to (485∘C). The relative permittivity was partially changed for two prepared samples regarding high pressure and long reaction time, which were the main preparation conditions of hydrothermal method.

An electrochemical sensor for the detection of p-nitrophenol based on a cyclodextrin-decorated gold nanoparticle–mesoporous carbon hybrid

The Analyst ◽  
2019 ◽  
Vol 144 (14) ◽  
pp. 4400-4406 ◽  
Author(s):  
Yongying Zhou ◽  
Jin Zhao ◽  
Shenghua Li ◽  
Minjie Guo ◽  
Zhi Fan
Keyword(s):  
Electrochemical Sensor ◽  
Gold Nanoparticle ◽  
Mesoporous Carbon

A novel electrochemical sensor based on a cyclodextrin-decorated gold nanoparticle–mesoporous carbon hybrid was constructed for the detection of p-nitrophenol.

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