Vietnam Journal of Catalysis and Adsorption
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Photocatalytic degradation of Rhodamine-B under visible light region by ZnO nanoparticles loaded on activated carbon made from longan seed biomass
Vietnam Journal of Catalysis and Adsorption - Tập 9 Số 3 - Trang 1-8 - 2021
In the present study, the synthesis of ZnO /LSAC through pyrolysis of the
carbonized material prepared from longan seed, zinc acetate in alkaline medium.
The obtained materials was characterized by means of XRD, SEM, TEM, BET and
UV-Vis-DRS. The XRD patterns of ZnO /LSAC nanocomposites were assigned to
wurtzite structure of ZnO with crystallite size about 15 to 30 nm. SEM and TEM
observations show...
#Zinc oxide #Photodegradation #Longan seed #Biomass carbon #Rhodamine-B
Enhanced oxidation of rhodamine B using Mg-Cu-Al hydrotalcite/chitosan composites as catalysts
Vietnam Journal of Catalysis and Adsorption - Tập 13 Số 3 - Trang 12-16 - 2024
A series of Mg-Cu-Al hydrotalcite/chitosan materials have been synthesized via a
co‑precipitation method, in which chitosan is synthesized from chitin extraction
from waste shrimp shells. The obtained solids were characterized by XRD, BET,
EDX, IR techniques. The materials have a well crystallized hydrotalcite
structure and medium surface area. It was observed that Mg-Cu-Al
hydrotalcite/chitosan c...
#Chitosan #Oxidation #Mg-Cu-Al hydrotalcite #Rhodamine B #H2O2
Effect of iron doping concentration on the structure and photocatalytic activity of ZnO nanosheets under visible light irradiation
Vietnam Journal of Catalysis and Adsorption - Tập 11 Số 2 - Trang 8-15 - 2022
Undoped and Fe-doped ZnO nanosheets have been successfully synthesized by
hydrothermal method using zinc acetate as the source of Zn2+, iron(III) nitrate
as the doping source, urea as media to control the solution pH and polyethylene
glycol as structure-directing agents. The obtained materials were characterized
by means of XRD, TEM, BET, FT-IR and UV-Vis-DRS. The results show that ZnO has a
hexa...
#Fe-doped ZnO #nanosheets #hydrothermal synthesis #methylene blue #photodegradation
Studying effect of temperature on to formation and red congo absorption ability of cupper oxide
Vietnam Journal of Catalysis and Adsorption - Tập 9 Số 3 - Trang 118-123 - 2020
Cuprous oxide nanoparticles (Cu2O) were prepared by a one-step reduction method
at 65, 70 and 85oC temperature. The Cu2O nanoparticles were characterized by
XRD, Raman, SEM and EDS techniques, respectively. The adsorption removal of red
congo dye from aqueous solution by the as-prepared Cu2O nanoparticles was
studied. Kinetics and isotherms studies suggested that the adsorption process
followed ps...
#Cu2O #hydrazine #absorption #congo red
Synthesis of WO3/g-C3N4 Z-scheme heterojunction with novel photocatalytic activity for degradation of residual antibiotics in aquatic environment under visible light
Vietnam Journal of Catalysis and Adsorption - Tập 11 Số 4 - Trang 68-72 - 2022
In the research, we successfully synthesized WO 3 /g-C 3 N 4 Z-scheme
heterojunction for photocatalytic degradation of tetracycline. These synthesized
materials have been characterized by X-ray diffraction (XRD), Scanning electron
microscope (SEM) and Fourier transform infrared spectroscopy (FTIR
Spectroscopy), to investigate their crystal phase, morphology and chemical
compositions. The synthesiz...
#WO3 #g-C3N4 #Photocatalytic #Heterojunction #Tetracycline
Synthesis, characterization, and photocatalytic properties of reed biochar/TiO2 composites
Vietnam Journal of Catalysis and Adsorption - Tập 12 Số 2 - Trang 61-66 - 2024
In this study, TiO2/biochar (TBC) materials were successfully synthesized by
simple hydrolysis. The photocatalytic activity of the products was evaluated
through the photodegradation ability of doxycycline (DC) in aqueous solution.
Characterization shows that TiO2 nanoparticles are well dispersed on the biochar
surface. The presence of biochar helped improve the specific surface area,
narrow the b...
#Titania #biochar #photodegradation #TiO2/biochar #doxycycline
A theoretical study on the influence of non-metal (B, C, N, O, F) doping on the electronic and optical properties of graphitic carbon nitride (g-C3N4)
Vietnam Journal of Catalysis and Adsorption - - 2021
A robust and accurate tight-binding quantum chemical method (GFN2-xTB) was
performed to study the electronic and optical properties of graphitic carbon
nitride (g-C3N4) and g-C3N4 modified with non-metal atom (B, C, N, O, F). The
vertical ionization potential, electron affinity and global electrophilicity
indexes were calculated and analyzed. The obtained results show that the doping
of B, C, N, O...
#g-C3N4 #non-metal #electronic structures #optical properties #GFN-xTB
In-vitro antifungal activities of silver-copper complex/chitosan (Ag-Cu@CS) nanoparticles synthesized by in-situ encapsulation
Vietnam Journal of Catalysis and Adsorption - Tập 10 Số 1S - Trang 24-30 - 2021
In this study, silver-copper complex/chitosan (Ag-Cu@CS) nanoparticles were
successfully synthesized by in-situ encapsulation reduction method. The results
show that as-synthesized nanoparticles were quasi spherical in shape with the
average diameter of 7.97 nm, well-dispersed particles in water and stable. The
test phytopathogenic fungi Sclerotium rolfsii, Magnaporthe oryzae K, Botrytis
cinerea, ...
#silver-copper complex/chitosan #in-situ encapsulation #plant protection
Synthesis of Fe-MIL-101 material and evaluation of photocatytic activity under visible light
Vietnam Journal of Catalysis and Adsorption - Tập 7 Số 2 - Trang 49-53 - 2018
In the present work, results synthesis of Fe-MIL-101 material and evaluation of
photocatytic activity under visible light. Characterization of Fe-MIL-101 was
investigated by using techniques including X-ray diffraction pattern (XRD),
scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX),
IR spectra and UV-visible absorption spectrometer. Evaluation of the
photocatalytic a...
Study on adsorption of Cu(II) in aqueous solution using zeolite 3A prepared from rice husk ash
Vietnam Journal of Catalysis and Adsorption - Tập 8 Số 1 - Trang 122-128 - 2019
In the present work, 3A zeolite was formed via a process of exchanging sodium by
potassium in 4A zeolite. The 3A zeolite was characterized using X-ray powder
diffraction (XRD), scanning electron microscopy (SEM) and X-ray fluorescence
(XRF). The chemical composition of the obtained product was
0,60K2O.0,39Na2O.Al2O3.2,02SiO2 with high crystalline. Its particles were
completed with a uniform size i...
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