scholarly journals Photo-catalytic dye degradation of methylene blue by using ZrO2/MWCNT nanocomposites

2021 ◽  
Author(s):  
Akshatha Gangadhar ◽  
Abhilash Mavinakere Ramesh ◽  
Jagadish Krishnegowda ◽  
Srikantaswamy Shivanna
Keyword(s):  
Methylene Blue ◽  
Carbon Nanotube ◽  
Photoelectron Spectroscopy ◽  
Zirconium Oxide ◽  
Dye Degradation ◽  
Irradiation Time ◽  
Synthesis Method ◽  
Multiwall Carbon Nanotube ◽  
X Ray ◽  
Multiwall Carbon

Abstract Photocatalytic degradation of the dyes was deliberated by altering the catalyst and dye concentrations. The Zirconium oxide/Multiwall carbon nanotube (ZrO2/MWCNT) catalyst was facilely synthesized by a hydrothermal synthesis method. The nanocomposite ZrO2/MWCNT was formed in hydrothermal condition 95 °C of low growth temperature. The physico-chemical properties were successfully characterized using X-ray diffraction, (XRD) Scanning Electron Microscope (SEM), Energy dispersive Spectroscopy (EDS), Dynamic light scattering (DLS) analysis, X-ray photoelectron spectroscopy (XPS). The presence of Orbicular shaped ZrO2 nanocrystallines and Multiwall carbon nanotube was characterized by XRD pattern shows the presence of ZrO2 and MWCNT with the 2θ peaks at 19.62, 22.5 & 30.2. The thermal behavior of the ZrO2/MWCNT partials was also investigated by differential thermal analysis, and their vibrational bands were identified by infrared spectroscopy. The photo catalytic degradation of methylene blue in industrial wastewater was observed under UV light irradiation using the synthesized ZrO2/MWCNT as catalyst. The results revealed that the ZrO2/MWCNT nanoparticles exhibited high degeneration with COD and TOC reducing from 241 mg/L and 148.00 mg/L to 2.34 mg/L and 1.26 mg/L respectively with the efficiency of 90–94% over 25–60 min duration of UV irradiation time. In comparison with the pristine Zirconium Oxide and MWCNT, the composite ZrO2/MWCNT nanoparticles exhibited more efficient, the durable and stable photo-catalytic activity during experiments.

scholarly journals Efficient Adsorption of Methylene Blue by Porous Biochar Derived from Soybean Dreg Using a One-Pot Synthesis Method

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 661
Author(s):  
Zhiwei Ying ◽  
Xinwei Chen ◽  
He Li ◽  
Xinqi Liu ◽  
Chi Zhang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Methylene Blue ◽  
Photoelectron Spectroscopy ◽  
Synthesis Method ◽  
Urban Pollution ◽  
Maximum Adsorption Capacity ◽  
One Pot ◽  
Average Pore ◽  
X Ray ◽  
Isotherm Equation

Soybean dreg is a by-product of soybean products production, with a large consumption in China. Low utilization value leads to random discarding, which is one of the important sources of urban pollution. In this work, porous biochar was synthesized using a one-pot method and potassium bicarbonate (KHCO3) with low-cost soybean dreg (SD) powder as the carbon precursor to investigating the adsorption of methylene blue (MB). The prepared samples were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM), elemental analyzer (EA), Brunauer-Emmett-Teller (BET), X-ray diffractometer (XRD), Raman spectroscopy (Raman), Fourier transform infrared spectrometer (FTIR), and X-ray photoelectron spectroscopy (XPS). The obtained SDB-K-3 showed a high specific surface area of 1620 m2 g−1, a large pore volume of 0.7509 cm3 g−1, and an average pore diameter of 1.859 nm. The results indicated that the maximum adsorption capacity of SDB-K-3 to MB could reach 1273.51 mg g−1 at 318 K. The kinetic data were most consistent with the pseudo-second-order model and the adsorption behavior was more suitable for the Langmuir isotherm equation. This study demonstrated that the porous biochar adsorbent can be prepared from soybean dreg by high value utilization, and it could hold significant potential for dye wastewater treatment in the future.

Characterizing the Morphologies of Mechanically Manipulated Multiwall Carbon Nanotube Films by Small-Angle X-ray Scattering†

2007 ◽  
Vol 111 (48) ◽  
pp. 17933-17940 ◽  
Author(s):  
Benjamin N. Wang ◽  
Ryan D. Bennett ◽  
Eric Verploegen ◽  
Anastasios J. Hart ◽  
Robert E. Cohen
Keyword(s):  
Carbon Nanotube ◽  
Small Angle ◽  
Multiwall Carbon Nanotube ◽  
X Ray ◽  
X Ray Scattering ◽  
Multiwall Carbon ◽  
Nanotube Films ◽  
Ray Scattering

scholarly journals Electrochemically Crafted Monodispersed γ-Cu5Zn8 Bimetallic Nanoalloy: Characterization and Its Synergistic Effect on Photocatalysis and Antibacterial Efficacy

2021 ◽  
Author(s):  
R. Singaravelan ◽  
M. Shanmugam ◽  
A. Abdul Salam ◽  
P. Vasanthi ◽  
M. Magesh ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Dye Degradation ◽  
Irradiation Time ◽  
Xrd Analysis ◽  
Electrochemical Technique ◽  
Bacterial Strains ◽  
X Ray ◽  
Mechanism Of Degradation ◽  
Powder Xrd Analysis

Abstract The present work reports the investigation of monodispersed nano brass prepared by the facile electrochemical technique. The influence of reaction conditions on the surface morphology and size of the bimetallic nano alloy were investigated through high resolution scanning electron microscopy (HR-SEM) and powder X-ray diffraction (PXRD) technique. From the powder XRD analysis the nano alloy was identified as a [[EQUATION]] phase. The detailed investigation was carried out using transition electron microscope (TEM) for the textural features and γ-CuZn phase stoichiometry was revealed by X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectroscopy (EDAX) analyses. Optical responses were analysed using diffuse reflectance spectroscopy (DRS). The energy band gap obtained from the optical spectrum revealed it can be a good catalyst. Rate of photocatalytic reaction and mechanism of degradation were discussed in detail. Most importantly, electrodeposited γ-CuZn nano alloy reveals superior nano-catalytic activity on methyl orange dye degradation in the shorter irradiation time. Furthermore, the antimicrobial efficacy of the γ-CuZn nano alloy was examined using gram positive and gram negative bacterial strains.

Quantitative Characterization of the Morphology of Multiwall Carbon Nanotube Films by Small-Angle X-ray Scattering

2007 ◽  
Vol 111 (16) ◽  
pp. 5859-5865 ◽  
Author(s):  
Benjamin N. Wang ◽  
Ryan D. Bennett ◽  
Eric Verploegen ◽  
Anastasios J. Hart ◽  
Robert E. Cohen
Keyword(s):  
Carbon Nanotube ◽  
Small Angle ◽  
Multiwall Carbon Nanotube ◽  
Quantitative Characterization ◽  
X Ray ◽  
X Ray Scattering ◽  
Multiwall Carbon ◽  
Nanotube Films ◽  
Ray Scattering

scholarly journals Near-Edge X-ray Absorption Fine Structure Studies of Electrospun Poly(dimethylsiloxane)/Poly(methyl methacrylate)/Multiwall Carbon Nanotube Composites

Langmuir ◽  
2013 ◽  
Vol 29 (51) ◽  
pp. 15822-15830 ◽  
Author(s):  
A. Douglas Winter ◽  
Eduardo Larios ◽  
Faisal M. Alamgir ◽  
Cherno Jaye ◽  
Daniel Fischer ◽  
...  
Keyword(s):  
Fine Structure ◽  
Carbon Nanotube ◽  
Methyl Methacrylate ◽  
Multiwall Carbon Nanotube ◽  
X Ray ◽  
Absorption Fine ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites ◽  
X Ray Absorption ◽  
Multiwall Carbon

scholarly journals Comparison of quasistatic to impact mechanical properties of multiwall carbon nanotube/polycarbonate composites

2010 ◽  
Vol 25 (6) ◽  
pp. 1118-1130 ◽  
Author(s):  
Paul A. Brühwiler ◽  
Michel Barbezat ◽  
Adly Necola ◽  
Doug J. Kohls ◽  
Oliver Bunk ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Energy Absorption ◽  
Multiwall Carbon Nanotube ◽  
Negative Effects ◽  
Good Correspondence ◽  
X Ray ◽  
X Ray Scattering ◽  
Negative Function ◽  
Injection Molded ◽  
Multiwall Carbon

We report the quasistatic tensile and impact penetration properties (falling dart test) of injection-molded polycarbonate samples, as a function of multiwall carbon nanotube (MWNT) concentration (0.0–2.5%). The MWNT were incorporated by dilution of a commercial MWNT/polycarbonate masterbatch. The stiffness and quasistatic yield strength of the composites increased approximately linearly with MWNT concentration in all measurements. The energy absorbed in fracture was, however, a negative function of the MWNT concentration, and exhibited different dependencies in quasistatic and impact tests. Small-angle x-ray scattering (SAXS) showed that the dispersion of the MWNT was similar at all concentrations. The negative effects on energy absorption are attributed to agglomerates remaining in the samples, which were observed in optical microscopy and SAXS. Overall, there was a good correspondence between static and dynamic energy absorption.

scholarly journals Synthesis of Magnetic Ferrocene-Containing Polymer with Photothermal Effects for Rapid Degradation of Methylene Blue

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 558
Author(s):  
Wenhui Zhu ◽  
Caiyun Zhang ◽  
Yali Chen ◽  
Qiliang Deng
Keyword(s):  
Methylene Blue ◽  
Photoelectron Spectroscopy ◽  
Room Temperature ◽  
Degradation Rate ◽  
Model Compound ◽  
Vibrating Sample Magnetometer ◽  
Simulated Sunlight ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir

Photothermal materials are attracting more and more attention. In this research, we synthesized a ferrocene-containing polymer with magnetism and photothermal properties. The resulting polymer was characterized by Fourier-transform infrared (FT-IR), vibrating sample magnetometer (VSM), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Its photo-thermocatalytic activity was investigated by choosing methylene blue (MB) as a model compound. The degradation percent of MB under an irradiated 808 nm laser reaches 99.5% within 15 min, and the degradation rate is 0.5517 min−1, which is 145 times more than that of room temperature degradation. Under irradiation with simulated sunlight, the degradation rate is 0.0092 min−1, which is approximately 2.5 times more than that of room temperature degradation. The present study may open up a feasible route to degrade organic pollutants.

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