scholarly journals Synthesis of material MOFs (Fe-BTC) by mechanic-chemical method and its application in the reactive dye degradation

2021 ◽  
Vol 10 (1) ◽  
pp. 21-27
Author(s):  
Tuan Vu Anh ◽  
Hoa Vu Thi ◽  
Manh Nguyen Ba ◽  
Giang Le Ha ◽  
Trang Pham Thi Thu ◽  
...  
Keyword(s):  
Chemical Method ◽  
Dye Degradation ◽  
Reactive Dye ◽  
High Photocatalytic Activity ◽  
N2 Adsorption ◽  
X Ray ◽  
Sem Image ◽  
Grinding Method ◽  
High Initial Concentration ◽  
Adsorption Desorption

Nano Fe-BTC materials were successfully synthesized by mechanical chemical grinding method. Samples were characterized by X-ray difraction (XRD), Fourier-transform infrared spectroscopy (FTIR), N2 adsorption–desorption, Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS). SEM image of Fe-BTC-60 showed the particle size of 40–60 nm. Fe-BTC nanocomposites were tested for the photocatalytic degradation of reactive yellow 145 (RY-145) in aqueous solution. Fe-BTC composites exhibited high photocatalytic activity. Thus, at pH of 3 and high initial concentration of 100 mg RY-145/L, removal efficiency reached the value of 97.45% after 90 min of reaction.

Synthesis and Application of Zn‑BTC/GO Nanocomposites as Highly Efficient Photocatalysts in the Dye Degradation

2021 ◽  
Vol 11 (1) ◽  
pp. 67-73
Author(s):  
Manh Nguyen Ba ◽  
Trang Pham Thi Thu ◽  
Hoa Tran Thi ◽  
Giang Le Ha
Keyword(s):  
Removal Efficiency ◽  
Dye Degradation ◽  
High Surface ◽  
High Surface Area ◽  
Reactive Dye ◽  
High Photocatalytic Activity ◽  
Microwave Method ◽  
Sem Image ◽  
High Initial Concentration ◽  
Reactive Red 195

Nanocomposite Zn-BTC/GO (BTC: benzene-1,3,5-tricarboxylic, GO: graphene oxide) was successfully synthesized by hydrothermal treatment with a microwave method. Samples were characterized by XRD, FTIR, EDS-mapping, BET, SEM, UV-vis DRS and XPS. SEM-image result showed nano Zn-BTC/GO particles size of 50-80 nm. Nanocomposite Zn-BTC/GO showed the a high surface area (1303 m2/g) and pore volume (1.08 cm3/g). The Zn-BTC/GO nanocomposite were tested for the photocatalytic degradation of reactive dye (Reactive Red 195) in an aqueous solution. The Zn-BTC/GO composites exhibited high photocatalytic activity. Thus, at the pH of 6.5 and the high initial concentration of 30 mg RR-195/L, removal efficiency reached the value of 96.16% after 60 min reaction. Moreover, nano Zn-BTC also showed high RR-195 removal efficiency after 3 catalytic regeneration. This contributes to sustainable development and green chemistry.

scholarly journals Synthesis and Application of Fe‑BTC Nanocomposites as Highly Efficient Photocatalysts in the Dye Degradation

2020 ◽  
Vol 9 (3) ◽  
pp. 63-68
Author(s):  
Manh Nguyen Ba ◽  
Tuan Vu Anh ◽  
Giang Le Ha
Keyword(s):  
Removal Efficiency ◽  
Dye Degradation ◽  
Ultrasonic Method ◽  
High Surface ◽  
High Surface Area ◽  
Reactive Dye ◽  
High Photocatalytic Activity ◽  
The Sustainable Development ◽  
Initial Concentration ◽  
High Initial Concentration

Nano Fe-BTC composites were successfully synthesized by hydrothermal treatment with an ultrasonic method. Samples were characterized by XRD, FTIR, BET, SEM, EDS, and XPS. SEM result showed nano Fe-BTC particles size of 10-30 nm. Nano Fe-BTC showed the high surface area (1258 m2/g) and pore volume (0.99 cm3/g). Fe-BTC nanocomposites were tested for the photocatalytic degradation of reactive dye (reactive yellow RY-145) in aqueous solution. Fe-BTC composites exhibited high photocatalytic activity. Thus, at the pH of 6.5 and the high initial concentration of 100 mg RY-145/L, removal efficiency reached the value of 98.13% after 60 min. of reaction. Moreover, nano Fe-BTC also showed high RY-145 removal efficiency after 3 catalytic regeneration. This contributes to the sustainable development and green chemistry.

Facile Preparation of Nanoporous SnO2 for Application in Photodegradation of Methylene Blue

2011 ◽  
Vol 194-196 ◽  
pp. 385-388
Author(s):  
Hong Juan Wang ◽  
Feng Qiang Sun ◽  
Ming Zhong Ren ◽  
Qing Wei Guo
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
High Photocatalytic Activity ◽  
N2 Adsorption ◽  
Photochemical Method ◽  
Degussa P25 ◽  
Adsorption Desorption

Nanoporous SnO2with high photocatalytic activity has been successfully prepared by a photochemical method, using SnCl2aqueous solution as a precursor. The as-synthesized sample was characterized by XRD, N2 adsorption-desorption and UV-vis. The photocatalytic activity of the sample was evaluated by degrading methylene blue (MB) aqueous solution under the UV light source and was compared with that of the commercial titania (Degussa P25). The results showed that the produced SnO2can degrade MB solution quickly and has comparative photocatalytic performance with P25 for degrading MB. This facile method supplies an effective way to prepare SnO2photocatalyst.

Comparison of TiO2/RH-MCM-41 and TiO2/TEOS-MCM-41 Hybrid Catalysts in Characteristics and Photodegradation of Tetramethylammonium

2010 ◽  
Vol 93-94 ◽  
pp. 22-26 ◽  
Author(s):  
Surachai Artkla ◽  
Won Yong Choi ◽  
Jatuporn Wittayakun
Keyword(s):  
Irradiation Time ◽  
Catalytic Performance ◽  
X Ray Diffraction ◽  
N2 Adsorption ◽  
X Ray ◽  
Transmission Electron ◽  
Photocatalytic Activities ◽  
Adsorption Desorption ◽  
Two Hybrid ◽  
Mcm 41

This work compared properties and catalytic performance of two hybrid photocatalysts, TiO2/RH-MCM-41 and TiO2/TEOS-MCM-41 prepared by loading nanoparticles of TiO2 (10 wt.%) on MCM-41 synthesized with rice husk silica and tetraethyl orthosilicate respectively. The supports and catalysts were characterized by X-ray diffraction, N2 adsorption-desorption, transmission electron microscopy and zeta potential. The photocatalytic activities of the TiO2/RH-MCM-41 and TiO2/TEOS-MCM-41 for the degradation of tetramethylammonium (TMA) in aqueous slurry were similar with a complete conversion after irradiation time of 90 min at pH 7.

Preparation Ag2S Nanorods and Nanoparticles via a Simple Chemical Method

2011 ◽  
Vol 364 ◽  
pp. 500-503 ◽  
Author(s):  
S. J. Kasim ◽  
F. H. Khaleel ◽  
F. A. Kasim ◽  
M.A. Mahdi
Keyword(s):  
Electron Microscopy ◽  
Chemical Method ◽  
Atomic Ratio ◽  
S Phase ◽  
Molar Concentration ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sem Image ◽  
Simple Chemical ◽  
Scanning Electron

Ag2S nanorods and nonoparticles have been successfully prepared using chemical method. Silver nitrate with molar concentration of 0.1 M and thiourea with different molar concentration were used as a source of Ag++and S++ions, respectively. The pH of solution was in range of 10-11. Scanning electron microscopy (SEM) image showed that the nanorods length and diameter were 2.5-3 μm and 300-400 nm, respectively. X-ray diffraction results showed a monoclinic α-Ag2S phase was obtained. The atomic ratio of silver and sulphur were found using energy dispersive spectroscopy (EDS) and it was 62.39% and 37.61%, respectively.

scholarly journals Assessing the Aflatoxins Mitigation Efficacy of Blueberry Pomace Biosorbent in Buffer, Gastrointestinal Fluids and Model Wine

Toxins ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 466
Author(s):  
Usman Rasheed ◽  
Qurat Ul Ain ◽  
Muhammad Yaseen ◽  
Sayantan Santra ◽  
Xiaohua Yao ◽  
...  
Keyword(s):  
Maximum Adsorption Capacity ◽  
Kinetics Study ◽  
N2 Adsorption ◽  
Freundlich Model ◽  
X Ray ◽  
Adsorption Performance ◽  
Experimental Parameters ◽  
Facile Fabrication ◽  
Cherry Pomace ◽  
Adsorption Desorption

Blueberry (BB) and cherry pomace were investigated as new biosorbents for aflatoxins (AFs) sequestration from buffered solutions, gastrointestinal fluids and model wine. Among the tested biosorbents, BB exhibited the maximum adsorption performance for AFs and hence was further selected for the optimization of experimental parameters like pH, dosage, time and initial concentration of AFs. Material characterizations via scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, N2 adsorption-desorption isothermal studies, thermogravimetric analysis (TGA) and X-ray photon spectroscopy (XPS) techniques revealed useful information about the texture and chemical composition of the biosorbents. The fitting of isothermal data with different models showed the model suitability trend as: Sips model > Langmuir model > Freundlich model, where the theoretical maximum adsorption capacity calculated from the Sips model was 4.6, 2.9, 2.7 and 2.4 mg/g for AFB1, AFB2, AFG1 and AFG2, respectively. Kinetics study revealed the fast AFs uptake by BB (50–90 min) while thermodynamics studies suggested the exothermic nature of the AFs adsorption from both, single as well as multi-toxin buffer systems, gastrointestinal fluids and model wine. Accrediting to the fast and efficient adsorption performance, green and facile fabrication approach and cost-effectiveness, the newly designed BB pomace can be counted as a promising contender for the sequestration of AFs and other organic pollutants.

Elucidating the structure, redox properties and active entities of high-temperature thermal aged CuOx-CeO2 catalysts for CO-PROX

2021 ◽  
Author(s):  
Zhihuan Qiu ◽  
Xiaolin Guo ◽  
Jianxin Mao ◽  
Renxian Zhou
Keyword(s):  
High Temperature ◽  
Rietveld Refinement ◽  
Copper Content ◽  
Redox Properties ◽  
Coprecipitation Method ◽  
Desorption Isotherm ◽  
X Ray Diffraction ◽  
N2 Adsorption ◽  
X Ray ◽  
Adsorption Desorption

CuOx-CeO2 catalysts with different copper content are synthesized via a coprecipitation method and thermal treated at 700 oC. Various characterization techniques including X-ray diffraction (XRD) Rietveld refinement, N2 adsorption-desorption isotherm,...

The Application of Mesoporous ZSM-5 Zeolite in the ULSD Catalysts

2020 ◽  
Vol 4 (4) ◽  
pp. 1-3
Author(s):  
Liu L
Keyword(s):  
Catalytic Performance ◽  
Nitrogen Compounds ◽  
In Situ Ftir ◽  
X Ray Diffraction ◽  
N2 Adsorption ◽  
X Ray ◽  
Acidic Sites ◽  
Adsorption Desorption ◽  
Al2o3 Catalyst

The mesoporous ZSM-5 zeolite containing MoCoP/Al2O3 catalyst (C12-ZSM5) with the mixture of Al2O3 and mesoporous ZSM- 5 zeolite as carrier was synthesized. The catalytic performance of C12-ZSM5 catalyst was evaluated by the hydrodesulfurization (HDS) of different diesel feedstock. The carriers and catalysts were characterized by N2 adsorption-desorption, pyridine-FTIR, X-ray diffraction (XRD) and CO in-situ FTIR (CO-FTIR) techniques. Results showed that mesoporous ZSM-5 can improve the acidity of the catalyst and increase the number of MoCoS active phases. The C12-ZSM5 catalyst had low HDS and HDN activity, because the acidic sites of mesoporous ZSM-5 were easily occupied by nitrogen compounds. The HDS activity of C12-ZSM5 catalyst was fully exploited by using graded packing technology, the sulfur content of product oil was 5.9 ng/μL. The relative HDS activity of C12-ZSM5 catalyst is 1.47 times that of FHUDS-8 catalyst.

Biosorption of crystal violet dye using inactive biomass of the fungus Diaporthe schini

2019 ◽  
Vol 79 (4) ◽  
pp. 709-717 ◽  
Author(s):  
Patrícia Grassi ◽  
Caroline Reis ◽  
Fernanda C. Drumm ◽  
Jordana Georgin ◽  
Denise Tonato ◽  
...  
Keyword(s):  
Crystal Violet ◽  
X Ray Diffraction ◽  
N2 Adsorption ◽  
Biosorption Capacity ◽  
X Ray ◽  
Crystal Violet Dye ◽  
Endothermic Process ◽  
Desorption Isotherms ◽  
Adsorption Desorption ◽  
Scanning Electron

Abstract An inactive biomass of a new fungus recently discovered, Diaporthe schini, was evaluated for the biosorption of crystal violet (CV) in simulated textile effluents. The characterization assays were performed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and N2 adsorption/desorption isotherms. The influences of pH and biosorbent dosage on the biosorption capacity were evaluated. Kinetics, equilibrium and thermodynamic studies were also carried out. Characterization techniques showed an amorphous biosorbent, with a rough surface containing irregular particles and surface area of 6.5 m2 g−1. The most adequate values of pH and biosorbent dosage were 7.5 and 0.4 g L−1, respectively. The Elovich kinetic model and the Sips equilibrium model were suitable to fit the experimental data. The biosorption capacity increased with temperature, reaching a maximum biosorption capacity of 642.3 mg g−1 at 328 K. The biosorption was a spontaneous and endothermic process. Diaporthe schini inactive biomass was an interesting biosorbent to treat colored effluents, presenting efficiency of 87% in the decolorization of a simulated dye house effluent.

scholarly journals Photocatalytic Reduction of CO2Using TiO2-Graphene Nanocomposites

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Jinghua Liu ◽  
Yinghua Niu ◽  
Xiong He ◽  
Jingyao Qi ◽  
Xin Li
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Raman Spectroscopy ◽  
Chemical Method ◽  
X Ray Diffraction ◽  
Graphene Nanocomposites ◽  
X Ray ◽  
Transmission Electron ◽  
Simple Chemical ◽  
Adsorption Desorption

TiO2-graphene (TiO2-RGO) nanocomposites were preparedviaa simple chemical method by using graphene oxide (GO) and TiO2nanoparticles as starting materials. The morphologies and structural properties of the as-prepared composites were characterized by X-ray diffraction, Raman spectroscopy, N2adsorption-desorption measurements, and transmission electron microscopy. TiO2-RGO nanocomposites exhibited great photocatalytic activity toward reduction of CO2into CH4(2.10 μmol g−1 h−1) and CH3OH (2.20 μmol g−1 h−1), which is attributed to the synergistic effect between TiO2and graphene.

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