Fe(iii) induced structural, optical, and dielectric behavior of cetyltrimethyl ammonium bromide stabilized strontium stannate nanoparticles synthesized by a facile wet chemistry route

RSC Advances ◽  
2015 ◽  
Vol 5 (22) ◽  
pp. 17202-17209 ◽  
Author(s):  
Astakala Anil Kumar ◽  
Ashok Kumar ◽  
J. K. Quamara ◽  
G. R. Dillip ◽  
Sang Woo Joo ◽  
...  
Keyword(s):  
Dielectric Behavior ◽  
Ammonium Bromide ◽  
Cetyltrimethyl Ammonium Bromide ◽  
Wet Chemistry ◽  
Strontium Stannate ◽  
Cetyltrimethyl Ammonium

Correlation between the structural, optical and dielectric behavior of Fe doped perovskite strontium stannate nanoparticles synthesized by a facile wet chemistry route.

Scheelite (CaWO4)-type microphosphors: Facile synthesis, structural characterization and photoluminescence properties

2016 ◽  
Vol 30 (32n33) ◽  
pp. 1650400 ◽  
Author(s):  
Yuanyuan Han ◽  
Dan Wang ◽  
Danyang Liang ◽  
Shiqi Wang ◽  
Guoxin Lu ◽  
...  
Keyword(s):  
Luminescence Decay ◽  
Precipitation Method ◽  
Ammonium Bromide ◽  
Photoluminescence Properties ◽  
Facile Synthesis ◽  
Cetyltrimethyl Ammonium Bromide ◽  
Broad Emission ◽  
Transition Formula ◽  
Cetyltrimethyl Ammonium ◽  
Uv Excitation

Scheelite (CaWO4)-type microphosphors were synthesized by the precipitation method assisted with cetyltrimethyl ammonium bromide (CTAB). All compounds crystallized in the tetragonal structure with space group [Formula: see text] (No. 88). FE-SEM micrographs illustrate the spherical-like morphologies and rough surface. PL spectra indicate the broad emission peak maximum at 613 nm under UV excitation. Luminescence decay curves monitored by [Formula: see text] transition ([Formula: see text] nm) of Eu[Formula: see text] in doped CaWO4 are presented, the curves exhibit a single-exponential feature and the lifetime for doped CaWO4 is 0.61 ms.

A Novel Method to Determinate Nonylphenol Contents in Water Samples Based on Laccases Cetyltrimethyl Ammonium Bromide-Carbon Paste Electrode

2012 ◽  
Vol 550-553 ◽  
pp. 2009-2013
Author(s):  
Yan Qun Liu ◽  
Jian Jun Ding ◽  
Yong Liang ◽  
Wen Hong Qiu ◽  
Feng Luo ◽  
...  
Keyword(s):  
Carbon Paste Electrode ◽  
Food Processing ◽  
Ammonium Bromide ◽  
Carbon Paste ◽  
Cetyltrimethyl Ammonium Bromide ◽  
Minimum Detectable Limit ◽  
Novel Method ◽  
Cetyltrimethyl Ammonium ◽  
Optimized Conditions ◽  
Paste Electrode

The eznyme biosensor(EB) as a sort of biosensors are widely used analyse target substances from samples of medicine, environment and food processing in recent years. During the EB preparation, effective immobilization of enzyme is a key step related with the activity of enzyme and the lifetime of EB. In current research, a method to determine nonylphenol(NP) contents in the water samlples has been developed on the base of laccases cetyltrimethyl ammonium bromide -carbon paste electrode. The experimental results showed that the EB developed in this optimized conditions, its minimum detectable limit could reach 0.2µg／L, and the recovery was in the range from 91% to 109% at the concentrations form 3.0×10-4 mol.L-1 to 5.0×10-6 mol.L-1. The sensor is perfect which is convenient, effective, and cheap and really can be used practice.

scholarly journals Effects of Bentonite Nanoclay and Cetyltrimethyl Ammonium Bromide Modified Bentonite Nanoclay on Phase Inversion of Water-in-Oil Emulsions

2020 ◽  
Vol 4 (1) ◽  
pp. 2
Author(s):  
Sileola B. Ogunlaja ◽  
Rajinder Pal
Keyword(s):  
Contact Angle ◽  
Aqueous Phase ◽  
Phase Inversion ◽  
Volume Fraction ◽  
Critical Volume ◽  
Ammonium Bromide ◽  
Cetyltrimethyl Ammonium Bromide ◽  
Modified Bentonite ◽  
Critical Volume Fraction ◽  
Cetyltrimethyl Ammonium

The effects of unmodified and modified bentonite nanoclays (with various degrees of surfactant modification) on the catastrophic phase inversion from water-in-oil (W/O) emulsion to oil-in-water (O/W) emulsion were determined experimentally. The bentonite nanoclay (NC-Bt) was suspended in the aqueous phase, and the critical volume fraction of water where phase inversion from W/O to O/W emulsion took place was determined through conductivity measurements. Cetyltrimethyl ammonium bromide (CTAB) was used as a surfactant to modify the nanoclay. The adsorption of CTAB onto nanoclay had a strong influence on the contact angle and the critical volume fraction of water where phase inversion took place. The modification of the nanoclay brought about by the adsorption of CTAB increased the three-phase contact angle (measured through the aqueous phase), thereby making it more hydrophobic, and prolonged the phase inversion point. CTAB alone and CTAB-modified nanoclay delayed the phase inversion process in a similar manner, showing a strong dependence on the CTAB concentration.

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