scholarly journals Photocatalytic degradation of VOCs from air stream using Mo:TiO2/GAC nanocomposites

2022 ◽  
Author(s):  
Kamaladdin Abedi ◽  
Behzad Shahmoradi ◽  
Ebrahim Mohammadi ◽  
Kitirote Wantala ◽  
Afshin Maleki ◽  
...  
Keyword(s):  
Visible Light ◽  
Sol Gel ◽  
Operational Parameters ◽  
Photodegradation Efficiency ◽  
Air Stream ◽  
Bet Analysis ◽  
Visible Light Active ◽  
Gel Technique ◽  
Active Composite ◽  
By Products

Abstract Modification of TiO2 is one of the techniques used to enhance its photodegradation efficiency and to make it visible-light-active. In this study, Mo-doped TiO2 nanoparticles were synthesized using a fast sol-gel technique, and then coated on granular activated carbon (GAC) as both substrate and adsorbent to obtain Mo:TiO2/GAC composite. The fabricated composite was characterized using powder XRD, SEM, EDAX, FTIR, and BET analysis. Then the composite was applied to photodegrade volatile organic compounds (VOCs) under both UV and visible light irradiation. The characterization results showed high crystallinity and purity. Mo:TiO2/GAC composite had higher photodegradation efficiency compared with bare TiO2 and bare GAC. Moreover, studying operational parameters showed that the optimum condition for photodegradation efficiency of VOCs was at flowrate of 1 l/min, VOCs concentration of 20 ppm, and light intensity of 400 and 600 W/m2 for UV and visible light respectively. The results suggest that Mo:TiO2/GAC is a visible-light-active composite and can be acceptably used to decompose VOCs under visible light with adequate efficiency and without the generation of harmful by-products such as O3 as compared with UV.

Photocatalytic Activity of Bismuth Ferrite Nanoparticles Synthesized via Sol-Gel Route

2019 ◽  
Vol 233 (5) ◽  
pp. 595-607 ◽  
Author(s):  
Mohsin Siddique ◽  
Noor Muhammad Khan ◽  
Muhammad Saeed
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Irradiation Time ◽  
Bismuth Ferrite ◽  
Sol Gel ◽  
Reaction System ◽  
Light Conditions ◽  
X Ray Diffraction ◽  
Light Region ◽  
Gel Technique

Abstract Nanosized, magnetically separable bismuth ferrite (BFO) nanoparticles, pertaining a crystallite size in the range of 14–15 nm were prepared via facile sol-gel technique. The product was characterized by scanning electron microscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy. The product was explored for the photocatalytic mineralization of rhodamine B (RB) dye in aqueous medium. The effect of different investigational parameters such as amount of photocatalyst, initial dye concentration and irradiation time on the photocatalytic degradation of RB was studied. The results reveal that the catalyst shows good degrading ability under normal pH and visible light conditions. BFO nanoparticles demonstrated a strong absorption ability in the visible-light region, which lead to efficient photocatalytic degradation of RB dye The reaction system was heterogeneous in nature in which the catalyst can be separated by a normal magnet.

Studies of MnO2/g-C3N4 hetrostructure efficient of visible light photocatalyst for pollutants degradation by sol-gel technique

2020 ◽  
Vol 20 ◽  
pp. 100512 ◽  
Author(s):  
S. Panimalar ◽  
R. Uthrakumar ◽  
E.Tamil Selvi ◽  
P. Gomathy ◽  
C. Inmozhi ◽  
...  
Keyword(s):  
Visible Light ◽  
Sol Gel ◽  
Visible Light Photocatalyst ◽  
Gel Technique

scholarly journals Synthesis and characterization of La1-xCexNiO3 with enhanced visible light photocatalytic activities

2019 ◽  
Vol 118 ◽  
pp. 01005
Author(s):  
Ying-ying Li ◽  
Jin-zhou Li ◽  
Yong-chun Liu
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Irradiation Time ◽  
Xylenol Orange ◽  
Sol Gel ◽  
Operational Parameters ◽  
X Ray Diffraction ◽  
Alizarin Red ◽  
Alizarin Yellow ◽  
Photocatalytic Activities

A series of La1-xCexNiO3 photocatalysts with different content of cerium element have been synthesized by sol-gel method. The as-prepared products were characterized by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The photocatalytic activities of these La1-xCexNiO3 composites under visible-light irradiation were evaluated by the degradation of methyl orange (MO). The effect of important operational parameters such as catalyst amount, reaction temperature, irradiation time, and comparison of photocatalytic activity with different dyes including methyl orange, alizarin red, alizarin yellow, xylenol orange were also studied. The results revealed that the La0.8Ce0.2NiO3 (LCNO) composites exhibited much higher photocatalytic activities than pure LaNiO3 (LNO).

Evaluation of curcumin assistance in the antimicrobial and photocatalytic activity of a carbon based TiO2 nanocomposite

2020 ◽  
Vol 44 (37) ◽  
pp. 15895-15907
Author(s):  
V. Suba ◽  
M. Saravanabhavan ◽  
Lakkaboyana Sivarama Krishna ◽  
Shaik Kaleemulla ◽  
E. Ranjith Kumar ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Sol Gel ◽  
Wet Impregnation ◽  
Visible Light Active ◽  
Carbon Based

The present study focuses on the synthesis of visible light active curcumin supported TiO2/AC (curcumin–TiO2/AC) through sol–gel and wet impregnation methods for the decolourization of Reactive Blue 160.

VISIBLE LIGHT ACTIVE Cu2+/TiO2 NANOCATALYST FOR DEGRADATION OF DICHLORVOS

2012 ◽  
Vol 11 (05) ◽  
pp. 1250030 ◽  
Author(s):  
TESHOME ABDO SEGNE ◽  
SIVA RAO TIRUKKOVALLURI ◽  
SUBRAHMANYAM CHALLAPALLI
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Sol Gel ◽  
Light Illumination ◽  
X Ray ◽  
Photo Catalytic Activity ◽  
Visible Light Active ◽  
Adsorption Desorption

The advantage of doping of TiO2 with copper has been utilized for enhanced degradation of pesticide under visible light irradiation. The sol–gel method has been undertaken for the synthesis of copper-doped TiO2 by varying the dopant loadings from 0.25 wt.% to 1.0 wt.% of Cu2+ . The doped samples were characterized by UV-Visible Diffuse Reflectance Spectroscopy (DRS), N2 adsorption–desorption (BET), X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscopy (SEM), and Energy Dispersive Spectrometry (EDS). The photocatalytic activity of the catalyst was tested by degradation of dichlorvos under visible light illumination. The results found that 0.75 wt.% of Cu2+ doped nanocatalysts have better photo catalytic activity than the rest of percentages doped, undoped TiO2 and Degussa P25. The reduction of band gap was estimated and the influence of the process parameters on photo catalytic activity of the catalyst has been explained.

Synthesis of visible-light-active TiO2-based photo-catalysts by a modified sol–gel method

2013 ◽  
Vol 94 ◽  
pp. 147-149 ◽  
Author(s):  
Juan Lu ◽  
Lianghai Li ◽  
Zuoshan Wang ◽  
Biao Wen ◽  
Jialei Cao
Keyword(s):  
Visible Light ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Visible Light Active

ChemInform Abstract: Sol-Gel Synthesis and Photocatalytic Study of Visible Light Active N-Doped KSbWO6.

ChemInform ◽  
2013 ◽  
Vol 44 (27) ◽  
pp. no-no
Author(s):  
J. R. Reddy ◽  
G. Ravi ◽  
Naveen Kumar Veldurthi ◽  
Radha Velchuri ◽  
Someshwar Pola ◽  
...  
Keyword(s):  
Visible Light ◽  
Sol Gel ◽  
Visible Light Active ◽  
Sol Gel Synthesis

scholarly journals Modified Sol-Gel Synthesis of Carbon Nanotubes Supported Titania Composites with Enhanced Visible Light Induced Photocatalytic Activity

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Quanjie Wang ◽  
Yanqing Wang ◽  
Baorong Duan ◽  
Mengmeng Zhang
Keyword(s):  
Carbon Nanotubes ◽  
Photocatalytic Activity ◽  
Carbon Nanotube ◽  
Visible Light ◽  
Sol Gel ◽  
High Photocatalytic Activity ◽  
Raw Material ◽  
Tetrabutyl Titanate ◽  
Multiwalled Carbon ◽  
Photodegradation Efficiency

Multiwalled carbon nanotube (MWCNT) enhanced MWCNT/TiO2nanocomposites were synthesized by surface coating of carbon nanotube with mixed phase of anatase and rutile TiO2through a modified sol-gel approach using tetrabutyl titanate as raw material. The morphological structures and physicochemical properties of the nanocomposites were characterized by FT-IR, XRD, DTA-TG, TEM, and UV-Vis spectra. The results show that TiO2nanoparticles with size of around 15 nm are closely attached on the sidewall of MWCNT. The nanocomposites possess good absorption properties not only in the ultraviolet but also in the visible light region. Under irradiation of ultraviolet lamp, the prepared composites have the highest photodegradation efficiency of 83% within 4 hours towards the degradation of Methyl Orange (MO) aqueous solution. The results indicate that the carbon nanotubes supported TiO2nanocomposites exhibit high photocatalytic activity and stability, showing great potentials in the treatment of wastewater.

scholarly journals Surface-Plasmon-Induced Visible Light Photocatalytic Activity of Fe3O4/TiO2 Nanocomposite

2020 ◽  
Author(s):  
Narjes Esmaeili ◽  
Azadeh Ebrahimian Pirbazari ◽  
Ziba Khodaee
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Surface Plasmon ◽  
Resonance Effect ◽  
Sol Gel ◽  
Analytical Techniques ◽  
Visible Light Photocatalytic Activity ◽  
Structure Morphology ◽  
Gel Technique ◽  
Visible Light Photocatalytic

In this research, first a binary nanocomposite of magnetic recyclable photocatalyst Fe3O4/TiO2, was synthesized by sol gel technique. Then, in order to enhance the photocatalytic activity of the synthesized nanocomposite, it was deposited by silver nanoparticles for using in degradation of organic pollutants 2, 4-dichlorophenol (2, 4-DCP) under visible light. A range of analytical techniques including XRD, FESEM/EDX, DRS, VSM and N2 physisorption were employed to reveal the crystal structure, morphology and property of the nanocomposites. We obtained 32% and 55% degradation of 2, 4-DCP under visible light after 180 min irradiation in the presence of Fe3O4/TiO2 and Fe3O4/TiO2/Ag respectively. Thus, the excellent visible light photocatalytic activity of Fe3O4/TiO2/Ag sample can be attributed to the surface plasmon resonance effect of Ag nanoparticles deposited on Fe3O4/TiO2 nanocomposite.

Sign in / Sign up

Export Citation Format

Share Document