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Ashery MH, Elsehly EM, Elnouby M, El-Maghraby EM. Controlled synthesis of MWCNTs/V 2O 5 nanocomposite by hydrothermal approach for adsorption and photodegradation processes. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 88:392-407. [PMID: 37522441 PMCID: wst_2023_217 DOI: 10.2166/wst.2023.217] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
The current paper outlines the synthesis of pristine multi-wall carbon nanotubes (PMWCNTs)/Vanadium pentoxide V2O5 and functionalized multi-wall carbon nanotubes (FMWCNTs)/V2O5 nanocomposite for photocatalytic applications. The FMWCNTs were obtained by the oxidizing agents (H2SO4 and HNO3) to introduce the oxygenated functional groups. The samples were synthesized by hydrothermal approach and investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy analysis (EDX), and Fourier transform infrared spectroscopy (FTIR). The photocatalytic activity of multi-wall carbon nanotubes (MWCNTs), FMWCNTs/V2O5, and PMWCNTs/V2O5 nanocomposites was assessed via methylene blue (MB) degradation from water under visible light. The results demonstrated that the removal efficiency of MB by PMWCNTs, FMWCNTs/V2O5, and PMWCNTs/V2O5 could reach 90.4, 98.9, and 94.9%, respectively. It was noticed that MB adsorption and photodegradation tend to follow pseudo-second-order kinetics. The mechanism of MB photodegradation by FMWCNTs/V2O5 nanoparticles was explained. MWCNTs/V2O5 nanocomposites will allow further applications to remove other dyes and contaminants from wastewater.
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Affiliation(s)
- Marwa H Ashery
- Physics Department, Faculty of Science, Damanhour University, Damanhour 22516, Egypt E-mail: ;
| | - E M Elsehly
- Physics Department, Faculty of Science, Damanhour University, Damanhour 22516, Egypt
| | - Mohamed Elnouby
- Nanomaterials and Composites Research Department, Advanced Technology and New Materials Research Institute, City for Scientific Research and Technological Applications, New Borg El-Arab City, Alexandria 21934, Egypt
| | - E M El-Maghraby
- Physics Department, Faculty of Science, Damanhour University, Damanhour 22516, Egypt
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Ashery MH, Elnouby M, EL-Maghraby EM, Elsehly EM. Structural control of V2O5 nanoparticles via a thermal decomposition method for prospective photocatalytic applications. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2023. [DOI: 10.1186/s43088-023-00350-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Abstract
Background
Recently, transition-metal oxides have represented an exciting research topic, especially their fundamental and technological aspects. Here, vanadium pentoxide nanoparticles (V2O5-NPs) were synthesized through the thermal decomposition of ammonium meta-vanadate. In the current study, we investigated the photocatalytic activity of V2O5-NPs to develop and regulate the V2O5 structure for adsorption applications.
Results
The obtained nanoparticles were inspected by X-ray diffraction, scanning electron microscope, transmission electron microscope, and differential thermogravimetric analysis, which proved the formation of the nanorod structure. The ultraviolet–visible absorption spectra revealed a 2.26 eV band gap for V2O5-NPs that correlates with indirect optical transitions. The photocatalytic activity of the V2O5-NPs was investigated by methylene blue (MB) degradation in aqueous solutions. An initial concentration of 25 ppm, a temperature of 40 °C, 40 mg of adsorbent mass, and 1 h of contact time were the optimal conditions for the efficient removal of MB that could reach up to 92.4%. The mechanism of MB photocatalytic degradation by V2O5-NPs is explained.
Conclusions
The photodegradation data better fit with the Langmuir isotherm model. The thermodynamic parameters indicated that the adsorption was spontaneous and endothermic. The reaction kinetics followed the pseudo-second-order model. Thermally prepared V2O5-NPs offer a simple and efficient approach for selective MB removal from an aqueous medium.
Graphical abstract
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Mohamed Ashfaque P, Nafeez Ahmed A, Mohammed Safiullah S, Taju G, Abdul Majeed S, Sahul Hameed AS, Anver Basha K. Toxicological assessment of functional polymer with single-walled carbon nanotubes in zebrafish embryos and its gill cell line. CHEMOSPHERE 2022; 303:134891. [PMID: 35569631 DOI: 10.1016/j.chemosphere.2022.134891] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/04/2022] [Accepted: 05/05/2022] [Indexed: 06/15/2023]
Abstract
Carbon nanotubes (CNTs) have been widely used in developing polymer hybrid coatings for anticorrosive application. In the present study, poly [(3,5-dimethyl-lH-pyrazole-1-yl) methyl methacrylate-co-glycidyl methacrylate] (PyM) was prepared by solution polymerization. Single-wall carbon nanotubes (SWCNT) were incorporated in the PyM by solution blending technique at different proportions. The PyM and its SWCNT (PyM-SWCNT) nanocomposites were characterized by FT-IR spectroscopy, X-Ray Diffraction, FE-SEM and HR-TEM. Different concentrations of PyM or PyM-SWCNT prepared in the present study were assessed separately for their toxicity by in vivo and in vitro assays using zebrafish embryos and gill cell line of zebrafish (DrG), respectively. The nanocomposites at the concentration of 400 μg ml-1 of PyM in 1.0% of SWCNT was found to be non-toxic and recommended for anticorrosive application whereas the nanocomposites with above 1% of SWCNT was found to be toxic. The nanocomposites with 1.5% of SWCNT delayed the hatching rate of eggs, decreased survival rate and heart beat in zebrafish embryos, and induced the morphological changes in DrG cells. Gene expression studies revealed that PyM-SWCNT with high concentration of SWCNT induced oxidative stress by activating ROS generations in zebrafish embryos and DrG cells. The immersion study of uncoated and coated with recommended concentration of PyM-SWCNT on mild steel (MS) in sea water was studied using FE-SEM and EDS, and the results showed effective corrosion protection without leaching behaviour. The nanocomposites with novel polymer in the present study may be used in the industry for anticorrosive purpose.
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Affiliation(s)
- P Mohamed Ashfaque
- PG & Research Department of Chemistry, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, Tamil Nadu, India
| | - A Nafeez Ahmed
- Aquatic Animal Health Laboratory, PG & Research Department of Zoology, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, Tamil Nadu, India
| | - S Mohammed Safiullah
- PG & Research Department of Chemistry, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, Tamil Nadu, India
| | - G Taju
- Aquatic Animal Health Laboratory, PG & Research Department of Zoology, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, Tamil Nadu, India
| | - S Abdul Majeed
- Aquatic Animal Health Laboratory, PG & Research Department of Zoology, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, Tamil Nadu, India
| | - A S Sahul Hameed
- Aquatic Animal Health Laboratory, PG & Research Department of Zoology, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, Tamil Nadu, India.
| | - K Anver Basha
- PG & Research Department of Chemistry, C. Abdul Hakeem College (Autonomous), Affiliated to Thiruvalluvar University, Melvisharam, Tamil Nadu, India.
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