Controllable Preparation and Rapid Photoelectric Response of Homogeneous ZnTe Microspheres

2022 ◽  
Author(s):  
Shuo Li ◽  
Yonghong Xu ◽  
Linhui Zhang ◽  
Binnian Zhong ◽  
Jun Yan
Keyword(s):  
Ethylene Glycol ◽  
Hydrazine Hydrate ◽  
Reducing Agent ◽  
Photoelectric Response ◽  
Homogeneous Reactor ◽  
Controllable Preparation

With the use of ethylene glycol as a solvent, polyvinylpyrrolidone as a surfactant and hydrazine hydrate as a reducing agent, uniform spherical ZnTe microstructure was synthesized in a homogeneous reactor...

Shape-Controlled Synthesis and Formation Mechanism of Cobalt Nanopowders by a PVP-Assisted Method

2010 ◽  
Vol 654-656 ◽  
pp. 1186-1189 ◽  
Author(s):  
Bing Cong Zhang ◽  
Hong Ying Yu ◽  
Dong Bai Sun
Keyword(s):  
Hydrazine Hydrate ◽  
Chemical Reduction ◽  
Reducing Agent ◽  
Soft Template ◽  
Basic Solution ◽  
X Ray Diffraction ◽  
Mechanism Of Formation ◽  
X Ray ◽  
Nucleation Sites ◽  
Shape Controlled

Three different kinds of morphologies including spherical, chainlike and wirelike cobalt nanopowders, have been synthesized by chemical reduction of coblat chloride solution with hydrazine hydrate in basic solution. The products were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). It was revealed that the morphologies of the nanopowders depend on the concentration of Co2+ and the way of adding reducing agent (hydrazine hydrate). These two features affected the nucleation sites and the number of nucleuses. When the concentration of Co2+ was low, nucleuses formed in the soft template, while the reducing of the reducing agent added drop wise, a little number of nucleuses was formed. Based on that, a mechanism of formation, as a basis of gram-scale syntheses, was proposed.

scholarly journals MoS2 QDs/8-Armed Poly(Ethylene Glycol) Fluorescence Sensor for Three Nitrotoluenes (TNT) Detection

Biosensors ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 475
Author(s):  
Xiaoyuan Zhang ◽  
Zhiqiang Su
Keyword(s):  
Quantum Dots ◽  
Polyethylene Glycol ◽  
Detection Limit ◽  
Ethylene Glycol ◽  
Hydrazine Hydrate ◽  
Poly Ethylene Glycol ◽  
Fluorescent Properties ◽  
Detection Range ◽  
Poly Ethylene ◽  
Tnt Detection

In this work, ammonia cross-linked 8-armed polyethylene glycol hydrogel material was successfully synthesized and used as a template for synthesizing nanoparticles with fluorescent properties. The 8-armed polyethylene glycol hydrogel template was used to prepare molybdenum disulfide quantum dots (MoS2 QDs). The ammonium tetrathiomolybdate functioned as a molybdenum source and hydrazine hydrate functioned as a reducing agent. The fluorescence properties of the as-prepared MoS2 QDs were investigated. The bursting of fluorescence caused by adding different concentrations of explosive TNT was studied. The study indicated that the synthesized MoS2 QDs can be used for trace TNT detection with a detection limit of 6 nmol/L and a detection range of 16–700 nmol/L. Furthermore, it indicated that the fluorescence-bursting mechanism is static bursting.

scholarly journals Characterization and Growth Mechanism of Nickel Nanowires Resulting from Reduction of Nickel Formate in Polyol Medium

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Olga A. Logutenko ◽  
Alexander I. Titkov ◽  
Alexander M. Vorob’yov ◽  
Yriy M. Yukhin ◽  
Nikolay Z. Lyakhov
Keyword(s):  
Ethylene Glycol ◽  
Hydrazine Hydrate ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Synthesis Conditions ◽  
Nickel Formate ◽  
Nickel Nanowires ◽  
Transmission Electron ◽  
Polyol Medium ◽  
Size And Morphology

Nickel linear nanostructures were synthesized by reduction of nickel formate with hydrazine hydrate in ethylene glycol medium in the absence of any surfactants or capping agents for direction of the particles growth. The effect of the synthesis conditions such as temperature, reduction time, type of polyol, and nickel formate concentration on the reduction products was studied. The size and morphology of the nickel nanowires were characterized by X-ray diffraction, scanning, and transmission electron microscopy. It was shown that the nickel nanocrystallites were wire-shaped with a face-center-cubic phase. Ethylene glycol was found to play a crucial role in the formation of the nickel nanowires. The possible growth processes of the wire-shaped particles taking place at 110 and 130°C are discussed. It was shown that, under certain synthesis conditions, nickel nanowires grow on the surface of the crystals of the solid intermediate of nickel with hydrazine hydrate.

Study on Preparation of Ni/C Composite Powder by Electroless Plating Compound Complex Agent

2013 ◽  
Vol 709 ◽  
pp. 93-97
Author(s):  
Yan Jiang ◽  
Rui Min Xiao ◽  
Zi Jing Li ◽  
Li Da Sun ◽  
Du Shu Huang
Keyword(s):  
Electrical Properties ◽  
Hydrazine Hydrate ◽  
Rough Surface ◽  
Electroless Plating ◽  
Composite Powder ◽  
Reducing Agent ◽  
Optimum Conditions ◽  
Complex Agent

t is that Ni/C composite powder are prepared by electroless plating with hydrazine hydrate as a reducing agent and compound complex agent.To investigate the effect of main salts, reductant dosage, graphite dose and compound complex agent ratio on the conductivity of composite powder.It is can be obtained under optimum conditions with good electrical properties , the rough surface is completely coated Ni / C composite powder.

AGET ATRP of methyl methacrylate with poly(ethylene glycol) (PEG) as solvent and TMEDA as both ligand and reducing agent

2009 ◽  
Vol 45 (8) ◽  
pp. 2313-2318 ◽  
Author(s):  
Ziqiang Hu ◽  
Xianrong Shen ◽  
Huayu Qiu ◽  
Guoqiao Lai ◽  
Jirong Wu ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Methyl Methacrylate ◽  
Reducing Agent ◽  
Poly Ethylene Glycol ◽  
Aget Atrp ◽  
Poly Ethylene

Hydrogenation of Dibenzo-18-Crown-6 Ether Using γ-Al2O3 Supported Ru-Pd and Ru-Ni Bimetallic Nanoalloy Catalysts

2019 ◽  
Vol 17 (4) ◽  
Author(s):  
Yogeshwar R. Suryawanshi ◽  
Mousumi Chakraborty ◽  
Smita Jauhari ◽  
Sulekha Mukhopadhyay ◽  
Kalsanka. T. Shenoy
Keyword(s):  
Catalytic Activity ◽  
Ethylene Glycol ◽  
Reducing Agent ◽  
Capping Agent ◽  
Solvothermal Technique

Abstract Ruthenium-palladium (Ru-Pd) and ruthenium-nickel (Ru-Ni) bimetallic nanoalloy particles with various metal compositions were synthesized by microwave irradiated (MWI) solvothermal technique using PVP (poly-N-vinyl-2-pyrrolidone) as capping agent and ethylene glycol as a solvent as well as reducing agent. Synthesized bimetallic nanoalloy particles were subsequently impregenated onto γ-Al2O3 support to obtain supported nanoalloy catalysts. Agglomeration of nanoalloyparticles were restricted by using excess solvent during synthesis, then distilled and recovered after completion of reaction. Hydrogenation of Dibenzo-18-crown-6 ether (DB18C6) was carried out at 9 MPa, 120°C and 3.5 h using synthesized bimetallic nanoalloy catalysts. It was observed that bimetallic nanolloycatalyst synthesized by MWI using Ru:Pd 3:1 % (w/w), exhibited higher catalytic activity and resulted 98.9 % conversion of DB18C6 with 100 % selectivity towards cis-syn-cis dicyclohexano-18-crown-6 ether (CSC DCH18C6).

Synthesis and Characterization of Graphene–Cu Nanocomposites by One-Pot Solvothermal Approach

2015 ◽  
Vol 723 ◽  
pp. 524-527
Author(s):  
Qi Ma ◽  
Jin Ping Song ◽  
Shao Min Shuang ◽  
Yong Guo ◽  
Chuan Dong
Keyword(s):  
Ethylene Glycol ◽  
Reducing Agents ◽  
Reducing Agent ◽  
Synthesis And Characterization ◽  
Protective Agent ◽  
Cu Nanoparticles ◽  
One Pot

GN nanosheets decorated with Cu nanoparticles were synthesized based on one-pot method using PVP as a protective agent, ethylene glycol as a solvent and reducing agent without additional reducing agents.

scholarly journals Mono-Dispersed Pt/MWNTs: Growing Directly on Multiwall Carbon Nanotubes (MWNTs) Using NaBH4 as Reducing Agent for Component of Proton Exchange Membrane Fuel Cell (PEMFC)

2019 ◽  
Vol 12 (1) ◽  
pp. 37
Author(s):  
Sudirman Sudirman ◽  
Wisnu Ari Adi ◽  
Emil Budianto ◽  
Deni Shidqi K. ◽  
Rike Yudianti
Keyword(s):  
Carbon Nanotubes ◽  
Ethylene Glycol ◽  
Proton Exchange Membrane ◽  
Sol Gel ◽  
Multiwall Carbon Nanotubes ◽  
Reducing Agent ◽  
Proton Exchange ◽  
Two Phases ◽  
Exchange Membrane ◽  
Multiwall Carbon

Synthesis of mono-dispersed Pt/MWCNTs has been performed. Platinum nanoparticles (Pt NPs) were grown directly on multiwall carbon nanotubes (MWCNTs) through sol-gel method using NaBH4 as reducing agent.       120 mg of activated MWCNT were weighed and then incorporated into the mixture (1) and sonicated for 2 hours to form the mixture (2). H2PtCl6 was weighed as much as 90 mg and dissolved into 45 mL of ethylene glycol until formed mixture (3). Solution (3) was dropwise every 3 seconds into the mixture (2). After that the mixture was distilled for 12 hours at a rate of 450 rpm. Subsequently the mixture was sonicated for 3 hours, then checked its pH, adjusting the desired pH to 4, 7, or 13 using the mixture 2M NaOH-ethylene glycol. The tests include SEM, EDS, XRD, and TEM for the morphologies and microstructures of the mono-dispersed Pt/MWCNT. The result of SEM observation and the analysis of the element using EDS found that the composite sample looked homogenous and contained element of C (MWCNT) and Pt (platinum). From the XRD shows that the composite Pt/MWCNT of the product synthesized without the reducing agent consists of three phases, namely C (MWCNTs), Pt (platinum), and H2PtH4, while the product synthesized using NaBH4 reducing agent consist of two phases, namely C (MWCNTs) and Pt (platinum ). The TEM image shows that the Pt NPs are spherical in size ~ 5 nm. Pt NPs appear to be attached on MWCNTs, either agglomerated or dispersed on the surface of MWCNTs. This paper will be compared between Pt/MWCNTs synthesis results with and without using NaBH4 reducing agent, as well as dispersed Pt NPs on MWCNTs.

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