Preparation of Nano-MnO2 and Adsorption of Reactive Brilliant Blue

2016 ◽  
Vol 847 ◽  
pp. 294-298
Author(s):  
Xiao Feng Fan ◽  
Yue Cheng
Keyword(s):  
Reaction Time ◽  
Room Temperature ◽  
Particle Diameter ◽  
Solution Concentration ◽  
Brilliant Blue ◽  
Uniform Size ◽  
Initial Concentration ◽  
One Step ◽  
Ft Ir ◽  
Xrd Patterns

MnO2 nanoparticles were prepared by one-step redox under room temperature. The sample was characterized by XRD, SEM, TEM and FT-IR. The results indicated that the MnO2 nanoparticles was amorphous δ-MnO2 with the uniform size of 10-20nm in particle diameter, which can be seen by XRD patterns. The four peaks appear at 2θ = 23.24°,36.1°,45.42°and 64.38°, respectively. FT-IR results showed the 519 cm-1 as Mn-O features manganese dioxide absorption. The effect of the pH, nanoMnO2 dosage, reaction time, reaction temperature and initial concentration were studied on the removal of reactive brilliant blue. It was found that the removal ability of reactive brilliant blue was the best under the selected conditions: pH was 3.0, dosage of nanoMnO2 was 0.05g, KN-R solution concentration was 5mg / L, reaction time was 2h, temperature was 25°C.

The Research for Microwave Modified Vermiculite Adsorption of Zn2+

2014 ◽  
Vol 809-810 ◽  
pp. 493-499
Author(s):  
Li Fang Bao ◽  
Chen Li Wang ◽  
Jin Chuan Gu ◽  
Sheng Zhong ◽  
Rui Wang
Keyword(s):  
Reaction Time ◽  
Correlation Coefficient ◽  
Adsorption Isotherms ◽  
Reaction Temperature ◽  
Room Temperature ◽  
Adsorption Equilibrium ◽  
Adsorption Rate ◽  
Absorption Mechanism ◽  
Initial Concentration ◽  
The Impact

The impact on the adsorption of Zn2+of these factors, initial concentration, modification time, reaction time vermiculite dosage, reaction temperature and pH having, and absorption mechanism are studied . The results show that: microwave modification time 30s, reaction time 40min, modified vermiculite dosage 8g/L, reaction temperature 30°C, reaction pH 6, Zn2+ adsorption rate can reach 97.91%, adsorption isotherms of Zn2+ by microwave modified vermiculite show that the adsorption equilibrium is consistent with Langmuir curves, correlation coefficient reached to 0.997 at room temperature.

Intercalation of basic amino acids into layered zirconium proline-N-methylphosphonate phosphate

2011 ◽  
Vol 65 (5) ◽  
Author(s):  
Ren-Quan Zeng ◽  
Xiang-Kai Fu ◽  
Xin-Bin Yang
Keyword(s):  
Amino Acids ◽  
Inductively Coupled Plasma ◽  
Room Temperature ◽  
Plasma Analysis ◽  
X Ray ◽  
Basic Amino Acids ◽  
Inductively Coupled ◽  
Ft Ir ◽  
Xrd Patterns ◽  
Ir And Raman

AbstractIntercalation of basic amino acids into layered zirconium proline-N-methylphosphonate phosphate (α-ZPMP) was investigated at room temperature. Three kinds of host-guest compounds were prepared and characterised by elemental analysis, inductively coupled plasma analysis (ICP), Fourier transform infrared spectrum (FT-IR), Raman spectrum, X-ray powder diffraction (XRD) and thermoanalysis. The interaction of amino acid guests with P-OH of α-ZPMP host was documented by FT-IR and Raman spectra. In addition, the XRD patterns indicated that l-arginine or l-lysine were intercalated into the interlayer galleries of α-ZPMP host; the interlayer distances of the Larginine and l-lysine intercalation compounds were expanded from 1.520 nm to 2.218 nm and 2.207 nm, respectively. l-arginine and l-lysine would be arranged as a mono-molecule layer in different orientations. The interlayer distance of l-histidine (d = 1.522 nm) was similar to that of α-ZPMP host (d = 1.520 nm), l-histidine might be adsorbed on the outer surface of the α-ZPMP host. Thermoanalysis showed that the intercalated l-arginine and l-lysine were removed at 110–305°C or 150–250°C, respectively, the adsorbed l-histidine was released at a temperature of up to 320°C.

A facile microemulsion template route for producing hollow silica nanospheres as imaging agents and drug nanocarriers

2015 ◽  
Vol 3 (16) ◽  
pp. 3130-3133 ◽  
Author(s):  
Nirun Jatupaiboon ◽  
Yanfang Wang ◽  
Hao Wu ◽  
Xiaojie Song ◽  
Yizhe Song ◽  
...  
Keyword(s):  
Shell Thickness ◽  
Room Temperature ◽  
Silica Nanospheres ◽  
Uniform Size ◽  
Hollow Silica ◽  
One Step ◽  
Reverse Microemulsion Method ◽  
Hollow Silica Nanospheres ◽  
Drug Nanocarriers ◽  
Uniform Size Distribution

Hollow silica nanospheres with uniform size distribution and tuneable shell thickness were synthesized through a one-step reverse microemulsion method at room temperature within 24 h.

Study on the Photocatalytic Degradation of Diesel Pollutants over a Sol-Gel Prepared TiO2

2012 ◽  
Vol 476-478 ◽  
pp. 1926-1929
Author(s):  
Xiao Cai Yu ◽  
Dong Dong Hu ◽  
Qian Du ◽  
Xv Zheng ◽  
Ji Yao Guo
Keyword(s):  
Reaction Time ◽  
Photocatalytic Degradation ◽  
Room Temperature ◽  
Ph Value ◽  
Removal Rate ◽  
Sol Gel ◽  
Initial Concentration ◽  
Five Factors ◽  
Degradation Reaction ◽  
Diesel Degradation

Nanoscale titanium dioxide (TiO2) has been fabricated through a sound sol-gel method at room temperature with Tetra-n-butyl Titanate as the precursor, and the particles are characterized by XRD and TEM techniques. The results manifest that the as-prepared TiO2 is amorphous with the anatase structure and its size is around 33.2nm. Five factors, including dosage of TiO2, initial concentration of diesel, pH value, photocatalytic degradation reaction time and the presence of H2O2, are considered in the diesel degradation experiments. An orthogonal test is carried out to optimize the photocatalytic degradation of diesel pollutants based on the single-factor experiments. It reveals that when the dosage of TiO2 is 1.0g/L, the initial concentration of diesel is 0.5g/L, pH value is 6, the reaction time is 4h and the H2O2 dosage is 0.09%, the removal rate of diesel pollutants can up to 88%. Besides, the influence of each factor on removing diesel can be arranged in decreasing order: initial concentration of diesel> photocatalytic reaction time> pH value> TiO2 dosage> H2O2 dosage.

Synthesis of the Carboxyl and Pyridine Functional Ionic Liquids

2014 ◽  
Vol 513-517 ◽  
pp. 246-250 ◽  
Author(s):  
Ying Xiong ◽  
Min Yang
Keyword(s):  
Ionic Liquids ◽  
Reaction Time ◽  
Anion Exchange ◽  
Room Temperature ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Maximum Yield ◽  
Step Method ◽  
Strong Base ◽  
One Step

The effects of different solvents on synthesis of base functional ionic liquid, butyl pyridinium hydroxide ([bPy]OH), from butyl pyridinium bromine ([bPy]Br) were investigated systematically using KOH/NaOH as the base agent and strong base anion exchange resin. The results showed that the yield of [bPy]OH achieved 35% with the molar ratio of 1:1.1 ([bPy]Br to NaOH) using dichloromethane under room temperature. With isopropanol and 8 h of the reaction time, the yield could reach 88% with byproducts. The yield of 97% without byproduct was achieved by using strong base anion exchange resin in column chromatography static reaction for 0.25 h. The yield of carboxyl and pyridine functional ionic liquids based on neutralization method, exchange method and one-step method were compared and the results showed that the one-step method possessed the maximum yield of 88% with 3 h of the reaction time at room temperature.

scholarly journals Ca2+ removal from water by the use of Na-palygorskite for potential water softening

2021 ◽  
Author(s):  
Gianni Eleni ◽  
Panagopoulos Georgios ◽  
Katsanou Konstantina ◽  
Biniaris Alexandros
Keyword(s):  
Linear Form ◽  
Water Samples ◽  
Room Temperature ◽  
Low Cost ◽  
Water Hardness ◽  
Water Softening ◽  
Initial Concentration ◽  
Ph Values ◽  
Langmuir Isotherm Model ◽  
Ft Ir

Abstract Sodium-treated palygorskite (Na-Pal) sample was investigated for the sorption of Ca2+ ions with the aim of treating water hardness. The effective modification of the mineral with Na+ was verified by XRD and FT-IR techniques. Batch kinetic experiments in standard solutions were performed proving that 30 g/L of Na-Pal were highly satisfactory as the Ca2+ removal reached the 85% for 100 mg/L Ca2+ initial concentration, which is very promising for the softening of moderate or hard waters. The Ca2+ removal found to be pH and temperature independent, with high removal rates at room temperature and common pH values of water samples (pH 4–12), rendering these circumstances ideal for the low-cost maintenance of the procedure that took place within the first 5 min. The linear form of the Langmuir isotherm model expressed better (R2 = 1) the Ca2+ sorption, which means that takes place at specific homogeneous sites of Na-Pal. Thermodynamic analysis proved the non-spontaneous (positive ΔG0), physical, and exothermic nature (ΔH0 = −10.8197 kJ/mol) of the reaction, while the kinetic models proved the chemisorption of Ca2+ by Na-Pal.

scholarly journals Activation and Characterization of Algerian Kaolinite, New and Green Catalyst for Synthesis of Polystyrene and Poly(1,3-dioxolane)

2021 ◽  
Vol 15 (4) ◽  
pp. 551-558
Author(s):  
Sarra Sabrina Aiche ◽  
◽  
Hodhaifa Derdar ◽  
Zakaria Cherifi ◽  
Mohammed Belbachir ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Reaction Time ◽  
1H Nmr ◽  
Room Temperature ◽  
Exchange Process ◽  
Sem Analysis ◽  
Green Catalyst ◽  
Modified Clay ◽  
Calculated Molecular Weight ◽  
Ft Ir

In the present work we have explored a new catalyst prepared with Algerian clay and a new method to synthesise polystyrene and poly(1,3-dioxolane). This technique consists of using Algerian modified clay (Kaolinite-H+) as a green catalyst. Kaolinite-H+ is a proton exchanged clay which is prepared through a simple exchange process. Synthesis experiments are performed in bulk. The polymerization of styrene in bulk leads to the yield of 83 % at room temperature with the reaction time of 3 h. Molecular weight of the obtained polystyrene is calculated by 1H NMR and is about 2196 g/mol. Polymerization of (1,3-dioxolane) is carried out at room temperature with the reaction time of 3 h and polymerization yield of 91 %. The calculated molecular weight of the obtained poly(1,3-dioxolane) is about 573 g/mol. The structure of the obtained polymers is confirmed by FT-IR and 1H NMR. The modified clay (Kaolinite-H+) is characterized by FT-IR, XRD and SEM analysis.

Room Temperature Synthesis and Characterization of Au Nanoparticles

2010 ◽  
Vol 159 ◽  
pp. 303-306
Author(s):  
Sharmin Haq ◽  
Tasnuva Ashrafee ◽  
Mahmuda Begum ◽  
Tasmia Sharmin ◽  
Nirban Bhowmick ◽  
...  
Keyword(s):  
Room Temperature ◽  
Cost Effective ◽  
Nano Particles ◽  
Emergent Properties ◽  
Temperature Synthesis ◽  
Room Temperature Synthesis ◽  
Potential Applications ◽  
One Step ◽  
Ft Ir ◽  
Photo Detection

The new emergent properties of nanoparticles include quantam size effect, nonlinear optical properties and thus the nanomaterials have extensive applications in microelectronic, bacteriostatic and catalytic or magnetic recording materials. Nanoparticles find potential applications in DNA detection and photo detection. Gold nano particles (AuNPs) are useful in nanoscale devices and systems due to its resistance to oxidation. In this paper a cost effective, versatile and simple one step room temperature synthesis of highly stable and freestanding Au quantum dots capped by TTAB (Tetradecyltrimethyl Amonium Bromide) in the range of 10-90 nm is reported. Ultraviolet- visible spectroscopy (UV-VIS), Fourier transformation infrared spectroscopy (FT-IR) was carried out to characterize these samples. Scanning Electron Microscopy (SEM) confirms the AuNPs sizes of about 80 and 88 nm.

The Removal of Phosphorus in Wastewater by Modified 4A Zeolite

2011 ◽  
Vol 356-360 ◽  
pp. 502-505 ◽  
Author(s):  
Yong Yin Zhang ◽  
Li Ping Wang ◽  
Er Deng Du ◽  
Yi Zhong Chen
Keyword(s):  
Reaction Time ◽  
Aluminum Chloride ◽  
Phosphorus Removal ◽  
Room Temperature ◽  
Sem Analysis ◽  
Phosphorus Concentration ◽  
Removal Mechanism ◽  
Adsorption Time ◽  
Initial Concentration ◽  
4A Zeolite

A kind of 4A zeolite, which was modified by magnesium chloride and aluminum chloride, was used to treatment phosphorus wastewater. The effect of several parameters on phosphorus removal was also investigated, including zeolite dosage, pH, phosphorus concentration and the adsorption time. The results showed that, under the conditions of pH 7, the amount of modified 4A zeolite 0.05g, reaction time 15min, room temperature, the removal efficiency of phosphorus with initial concentration 2mg/L reached 98%. The SEM analysis explained that crystalline structure of 4A zeolite has changed after modification, thus resulted in the improvement of adsorption capacity. What’s more, the phosphorus removal mechanism was also discussed.

ONE-STEP SYNTHESIS OF BIOCOMPATIBLE CHITOSAN/NaGdF4:Eu3+ NANOCOMPOSITE WITH FLUORESCENT AND MAGNETIC PROPERTIES FOR BIOIMAGING

NANO ◽  
2014 ◽  
Vol 09 (01) ◽  
pp. 1450007 ◽  
Author(s):  
HUI LI ◽  
CHUANXI WANG ◽  
YINGNAN JIANG ◽  
ZHANCHEN CUI ◽  
QUAN LIN
Keyword(s):  
Hexagonal Phase ◽  
Mri Contrast Agent ◽  
Uniform Size ◽  
Mri Contrast ◽  
Potential Applications ◽  
One Step ◽  
Ft Ir ◽  
Good Biocompatibility ◽  
Amine Groups ◽  
Magnetic Resonance Imaging Mri

Lanthanide-doped luminescent nanoscale materials have great potential applications in biological researches. Herein, we reported a novel and mild method for one-step synthesis of chitosan/ NaGdF 4: Eu 3+ nanocomposites. The luminescent Eu 3+ ions and magnetic resonance imaging (MRI) contrast agent Gd 3+ ions were incorporated to these biocompatible nanocomposites. The resultant nanocomposites exhibited strong fluorescence and attractive magnetic features. The nanocomposites also have pure hexagonal phase with uniform size of about 65 nm. FT-IR spectra revealed that these nanocomposites were successfully coated by hydrophilic chitosan, whose amine groups conferred the nanocomposites excellent dispensability in aqueous solution. Besides, the MTT assay and laser confocal microscopy images have confirmed the good biocompatibility of the nanocomposites. These results indicated that the as-prepared nanocomposites could be used as an excellent targeted imaging agent in biological fields.

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