scholarly journals Development of AgFeO2/rGO/TiO2 Ternary Composite Photocatalysts for Enhanced Photocatalytic Dye Decolorization

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 923
Author(s):  
Nasir Shehzad ◽  
Muhammad Zafar ◽  
Muhammad Ashfaq ◽  
Abdul Razzaq ◽  
Parveen Akhter ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Dye Degradation ◽  
Dye Decolorization ◽  
Degradation Process ◽  
Polluted Water ◽  
Ternary Composite ◽  
Composite Photocatalysts ◽  
Reduced Graphene ◽  
Vis Spectroscopy ◽  
Photocatalytic Dye Degradation

Dyestuff is one of the most widely released pollutants into the environment. Many approaches have been considered to deal with the dye removal from polluted water such as adsorption, ultrafiltration, osmosis, solvent extraction and photocatalytic degradation. The photocatalytic degradation process is one of the most beneficial, economical and environmentally friendly ways to degrade the organic pollutants from wastewater. In this study, an efficient ferrite-based photocatalyst, AgFeO2/rGO/TiO2 was successfully developed using simple deposition and reflux method. Physical, chemical and structural properties were analyzed by using XRD, FTIR Raman and PL spectroscopy. The efficiency of photocatalyst was investigated for the decolorization of methyl blue (MB) dye and activity was measured through UV-vis spectroscopy. The effect of parameters like pH, concentrations of MB dye, and loading of silver ferrite (AgFeO2) was investigated. The study depicted that the properties of TiO2 were improved due to addition of silver ferrite and reduced graphene oxide (rGO). The 2.5% AgFeO2/rGO/TiO2 exhibited the highest efficiency and completely degraded the 50 ppm of MB dye in 30 min. The parametric study revealed that dye decolorization is faster in a neutral solution than in basic and acidic medium. The higher performance of the photocatalyst was attributed to the reduced charge recombination and improved optical properties. Thus, AgFeO2/rGO/TiO2 can be a potential composite for photocatalytic dye degradation and other photocatalytic applications under UV-Visible light irradiations.

Sol–Gel Assisted Isotropic Morphological Progression in Nanostructured MoO3 and Allied Investigations on Photocatalytic Dye-Degradation

2019 ◽  
Vol 19 (6) ◽  
pp. 3479-3486 ◽  
Author(s):  
Nilam Qureshi ◽  
Manish Shinde ◽  
Sudhir Arbuj ◽  
Sunit Rane ◽  
Anand Bhalerao ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Optical Properties ◽  
Photocatalytic Degradation ◽  
Rate Constants ◽  
Dye Degradation ◽  
Sol Gel ◽  
High Rate ◽  
Photocatalytic Dye Degradation ◽  
Gel Technique ◽  
Synthesis Protocol

We report tunable-morphology oriented facile yet scalable route to synthesize 1D (nanorod) and 2D (nanobelt) MoO3 nanostructures at gram scale using conventional as well as sonochemistry assisted sol–gel technique. The structural, morphological and optical properties of the samples can be befittingly altered by varying the synthesis protocol. The resultant orthorhombic MoO3 nanomorphs demonstrated efficient and expeditious photocatalytic degradation of the pollutant dye, Methylene Blue (MB). We have observed that appreciable photocatalytic MB dye-degradation can be accomplished within 30 minutes with high rate constants of 0.0786 min−1 and 0.233 min−1 for rod and belt-like MoO3-nanostructures, respectively. The pilot results indicate that the resultant MoO3 nanomorphs can be potentially used as solar light driven industrial photocatalyst material with their intrinsic photostability.

scholarly journals Tuning the structural properties of cadmium–aluminum layered double hydroxide for enhanced photocatalytic dye degradation

RSC Advances ◽  
2020 ◽  
Vol 10 (70) ◽  
pp. 43066-43074
Author(s):  
Daniel Saliba ◽  
Salah Eddin El Jamal ◽  
Antranik Jonderian ◽  
Manal Ammar ◽  
Mohamad Hmadeh ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Structural Properties ◽  
Layered Double Hydroxide ◽  
Dye Degradation ◽  
Hierarchical Structures ◽  
Reaction Diffusion ◽  
Photocatalytic Dye Degradation ◽  
Double Hydroxide

Hierarchical structures of Cd Al LDH of various cationic ratios of Cd : Al are successfully synthesized via the reaction diffusion framework. The obtained microspheres are investigated for the photocatalytic degradation of methylene blue.

scholarly journals Photocatalytic Degradation of Organic Pollutant using Reduced Graphene Oxide

2019 ◽  
Vol 8 (4S2) ◽  
pp. 870-872
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Photocatalytic Degradation ◽  
Reduced Graphene Oxide ◽  
Organic Pollutant ◽  
X Ray Diffraction ◽  
X Ray ◽  
Reduced Graphene ◽  
Vis Spectroscopy ◽  
Scaning Electron Microscopy

A simple eco friendly preparation of reduced graphene oxide from graphene oxide using strawberry extract is reported. As prepared reduced graphene oxide were characterized by X-Ray Diffraction, UV-Vis spectroscopy, Scaning electron microscopy and degradation performane of MB. The reduced graphene oxide was effectively degradation of MB.

ZnO Tetrapods for Potential Photocatalytic Dye Degradation

2018 ◽  
Vol 779 ◽  
pp. 97-101 ◽  
Author(s):  
Shynggys Sadyk ◽  
Timur Sh. Atabaev
Keyword(s):  
Photocatalytic Activity ◽  
Electron Microscope ◽  
Dye Degradation ◽  
Uv Light ◽  
Photocatalytic Properties ◽  
Light Illumination ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Photocatalytic Dye Degradation ◽  
Scanning Electron

In this study, a facile method was used to prepare ZnO tetrapods for potential dye degradation applications. Field emission scanning electron microscope (FESEM), energy-dispersive X-ray spectroscopy (EDX) and UV-Vis spectroscopy were employed to investigate the morphology, chemical composition, and photocatalytic properties of prepared ZnO tetrapods. A Rhodamine B (RB) dye was used as a model dye to study the photocatalytic activity of the prepared sample. It was shown that RB dye can be efficiently degraded in the presence of ZnO tetrapods under continuous UV-light illumination. Thus, prepared ZnO tetrapods with excellent photocatalytic properties can be potentially used in wastewater treatment.

Studies on the drastic improvement of photocatalytic degradation of acid orange-74 dye by TPPO capped CuO nanoparticles in tandem with suitable electron capturing agents

RSC Advances ◽  
2015 ◽  
Vol 5 (54) ◽  
pp. 43815-43823 ◽  
Author(s):  
Aarti Sharma ◽  
Raj Kumar Dutta
Keyword(s):  
Photocatalytic Degradation ◽  
Dye Degradation ◽  
Cuo Nanoparticles ◽  
Acid Orange ◽  
Photocatalytic Dye Degradation

Photocatalytic dye degradation of CuO nanoparticles in the presence of K2S2O8.

A 3D heterometallic Ni(ii)/K(i) MOF with a rare rna topology: synthesis, structural features, and photocatalytic dye degradation modeling

2019 ◽  
Vol 43 (44) ◽  
pp. 17457-17465 ◽  
Author(s):  
Marjan Abedi ◽  
Ghodrat Mahmoudi ◽  
Payam Hayati ◽  
Barbara Machura ◽  
Fedor I. Zubkov ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Dye Degradation ◽  
Structural Features ◽  
Bromocresol Green ◽  
Degradation Modeling ◽  
Photocatalytic Dye Degradation

A new picolinate-driven Ni/K MOF was prepared by different methods, fully characterized, and explored in the photocatalytic degradation of bromocresol green.

scholarly journals Green synthesis of selenium nanoparticles mediated from Ceropegia bulbosa Roxb extract and its cytotoxicity, antimicrobial, mosquitocidal and photocatalytic activities

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Vetrivel Cittrarasu ◽  
Durairaj Kaliannan ◽  
Kalaimurugan Dharman ◽  
Viji Maluventhen ◽  
Murugesh Easwaran ◽  
...  
Keyword(s):  
Dye Degradation ◽  
Computational Study ◽  
Selenium Nanoparticles ◽  
Halogen Lamp ◽  
Growth Inhibitory ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Photocatalytic Dye Degradation ◽  
Histopathological Studies ◽  
Ceropegia Bulbosa

AbstractThe present study is to design an eco-friendly mode to rapidly synthesize selenium nanoparticles (SeNPs) through Ceropegia bulbosa tuber’s aqueous extracts and confirming SeNPs synthesis by UV–Vis spectroscopy, FT-IR, XRD, FE-SEM-EDS mapping, HR-TEM, DLS and zeta potential analysis. In addition, to assess the anti-cancer efficacy of the SeNPs against the cultured MDA-MB-231, as studies have shown SeNPs biosynthesis downregulates the cancer cells when compared to normal HBL100 cell lines. The study observed the IC50 value of SeNPs against MDA-MB-231 cells was 34 µg/mL for 48 h. Furthermore, the SeNPs promotes growth inhibitory effects of certain clinical pathogens such as Bacillus subtilis and Escherichia coli. Apart, from this the SeNPs has shown larvicidal activity after 24 h exposure in Aedes albopitus mosquito’s larvae with a maximum of 250 g/mL mortality concentration. This is confirmed by the histopathology results taken at the 4th larval stage. The histopathological studies revealed intense deterioration in the hindgut, epithelial cells, mid gut and cortex region of the larvae. Finally, tried to investigate the photocatalytic activity of SeNPs against the toxic dye, methylene blue using halogen lamp and obtained 96% degradation results. Withal computational study SeNPs was shown to exhibit consistent stability towards breast cancer protein BRCA2. Overall, our findings suggest SeNPs as a potent disruptive agent for MDA-MB-231 cells, few pathogens, mosquito larvae and boosts the photocatalytic dye degradation.

scholarly journals Ag-doped ZnO nanorods embedded reduced graphene oxide nanocomposite for photo-electrochemical applications

2019 ◽  
Vol 6 (2) ◽  
pp. 181764 ◽  
Author(s):  
Farheen Khurshid ◽  
M. Jeyavelan ◽  
M. Sterlin Leo Hudson ◽  
Samuthira Nagarajan
Keyword(s):  
Graphene Oxide ◽  
Photocatalytic Degradation ◽  
Reduced Graphene Oxide ◽  
Electrochemical Impedance ◽  
Dye Degradation ◽  
Zno Nanorods ◽  
Zinc Oxide Nanorods ◽  
Photocurrent Generation ◽  
Reduced Graphene ◽  
Doped Zno

In this paper, the Ag-doped zinc oxide nanorods embedded reduced graphene oxide (ZnO:Ag/rGO) nanocomposite was synthesized for photocatalytic degradation of methyl orange (MO) in the water. The microstructural results confirmed the successful decoration of Ag-doped ZnO nanorods on rGO matrix. The photocatalytic properties, including photocatalytic degradation, charge transfer kinetics and photocurrent generation, are systematically investigated using electrochemical impedance spectroscopy (EIS), photocurrent transient response (PCTR) and open circuit voltage decay (OCVD). The results of photocatalytic dye degradation measurements indicated that ZnO:Ag/rGO nanocomposite is more effective than pristine ZnO to degrade the MO dye, and the degradation rate reached 40.6% in 30 min. The decomposition of MO with ZnO:Ag/rGO nanostructure followed first-order reaction kinetics with a reaction rate constant ( K a ) of 0.01746 min −1 . The EIS, PCTR and OCVD measurements revealed that the Ag doping and incorporation of rGO could suppress the recombination probability in ZnO by the separation of photo-generated electron–hole pairs, which leads to the enhanced photocurrent generation and photocatalytic activity. The photocurrent density of ZnO:Ag/rGO, ZnO/rGO and pristine ZnO are 206, 121.4 and 88.8 nA cm −2 , respectively.

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