scholarly journals Vanadium doped CaTiO3 cuboids: Role of vanadium in improving the photocatalytic activity

2021 ◽  
Author(s):  
Harsha Bantawal ◽  
Sandhya U. Shenoy ◽  
Denthaje Krishna Bhat
Keyword(s):  
Photocatalytic Activity ◽  
Water Splitting ◽  
Dye Degradation ◽  
Low Cost ◽  
Physicochemical Stability ◽  
Photocatalytic Dye Degradation

CaTiO3 has attracted enormous interest in the field of photocatalytic dye degradation and water splitting owing to its low cost, excellent physicochemical stability and structural tunability. Herein, we have developed...

Solar photocatalytic activity of nano-ZnO supported on activated carbon or brick grain particles: Role of adsorption in dye degradation

2014 ◽  
Vol 486 ◽  
pp. 159-169 ◽  
Author(s):  
Pankaj Raizada ◽  
Pardeep Singh ◽  
Amit Kumar ◽  
Gaurav Sharma ◽  
Brijesh Pare ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Activated Carbon ◽  
Dye Degradation ◽  
Nano Zno ◽  
Solar Photocatalytic Activity

Structure, morphology features and photocatalytic properties of α-Ag2WO4 nanocrystals-modified Palygorskite clay

2021 ◽  
Vol 02 ◽  
Author(s):  
Amanda Carolina Soares Jucá ◽  
Francisco Henrique Pereira Lopes ◽  
Herbert Vieira Silva-Júnior ◽  
Lara Kelly Ribeiro Silva ◽  
Elson Longo ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Rhodamine B ◽  
Dye Degradation ◽  
Degradation Kinetics ◽  
Low Cost ◽  
Catalytic Efficiency ◽  
Photocatalytic Properties ◽  
Impregnation Method ◽  
Heat Treated ◽  
Modified Palygorskite

Aims: In the present study, we investigate the photocatalytic properties of α-Ag2WO4 nanocrystals-modified Palygorskite (PAL) clay synthesized by the impregnation method. The PAL clay was chemically purified and heat-treated (500 ºC for 2 h), which served as an excellent supporting matrix for loading α-Ag2WO4(α-AWO) nanocrystals. Background: Water contamination is one of the most serious problems affecting human health, ecosystem survival, and the economic growth of societies. Industrial effluents, such as textile dyes, when not treated and improperly discharged into water resources are considered the main cause of water pollution. Thus the scientific community has been developing effective remediation technologies based on advanced oxidative processes to reduce the harmful effects of these organic pollutants. Objective: Improve the photocatalytic activity of PAL clay with α-AWO nanocrystals to degradation of Rhodamine B (RhB) dye. Methods: We purify and heat-treated the PAL clay, synthesize nanocrystals ofα-AWO nanocrystals and modify PAL clay with 30% α-AWO nanocrystals by the impregnation method. The modified PAL clay was able to improve RhB dye degradation. The materials were characterized by XRD, RAMAN,FE-SEM, FT-IR, XRF, etc. The samples were used as photocatalysts under UV-C lamps for the degradation of RhB dye in order to analyze its catalytic performances. Results: ThePAL clay modified with 30% α-AWO nanocrystals showed a catalytic efficiency of 79%, and degradation kinetics about 16 times higher when compared to PAL-500 only purified and heat-treated at 500 ºC. In this way, this PAL-modified is an alternative as a low-cost photocatalyst for the degradation of RhB dye. Conclusion: Ultraviolet-Visiblespectra revealed that our materials have opticalband gap energies controlled by indirect and direct electronic transitions and suitable to be activated under ultraviolet illumination. The adequate amount (30 wt.%) of α-Ag2WO4 nanocrystals added to PAL brought significant improvement of photocatalytic activity for the degradation of rhodamine B. Finally, a photocatalytic mechanism was proposed in detail.

rGO–diaminobutane surfaces with optimized N doping and hydrodynamics as dual proton–electron conductors and carbon photocatalysts

2021 ◽  
Vol 45 (1) ◽  
pp. 383-393
Author(s):  
Mohammad Razaul Karim ◽  
Mohammed M. Rahman ◽  
Abdullah M. Asiri
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Water Splitting ◽  
Light Harvesting ◽  
Dye Degradation ◽  
Interlayer Distance ◽  
Organic Hybrid ◽  
Reduced Graphene ◽  
N Doping

A reduced graphene oxide–diaminobutane (rGO–DAB) organic hybrid revealed excellent N doping, flexible interlayer distance, and light-harvesting property to support optimized photocatalytic activity for water splitting and dye degradation.

Effects of morphology, surface area, and defect content on the photocatalytic dye degradation performance of ZnO nanostructures

RSC Advances ◽  
2014 ◽  
Vol 4 (77) ◽  
pp. 41099-41110 ◽  
Author(s):  
Natalia Morales Flores ◽  
Umapada Pal ◽  
Reina Galeazzi ◽  
Alberto Sandoval
Keyword(s):  
Photocatalytic Activity ◽  
Surface Area ◽  
Dye Degradation ◽  
Zno Nanostructures ◽  
Defect Content ◽  
Photocatalytic Dye Degradation

Contributions of morphology, surface area, and defect content, on the photocatalytic activity of ZnO nanostructures have been discussed.

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.

Novel cone-like ZnO mesocrystals with co-exposed (101̄1) and (0001̄) facets and enhanced photocatalytic activity

2018 ◽  
Vol 5 (9) ◽  
pp. 2257-2267 ◽  
Author(s):  
Shuhua Liang ◽  
Xufeng Gou ◽  
Jie Cui ◽  
Yongguang Luo ◽  
Hongtao Qu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Dye Degradation ◽  
Zno Nanocrystals ◽  
Photocatalytic Dye Degradation

Surface heterojunctions were constructed in ZnO mesocrystals with co-exposed curved (101̄1) and flat (0001̄) surfaces and greater photocatalytic dye degradation was achieved compared to that of ZnO nanocrystals.

Efficient hydrogen/oxygen evolution and photocatalytic dye degradation and reduction of aqueous Cr(vi) by surfactant free hydrophilic Cu2ZnSnS4 nanoparticles

2015 ◽  
Vol 3 (15) ◽  
pp. 8098-8106 ◽  
Author(s):  
Priya Kush ◽  
Kalyanjyoti Deori ◽  
Anup Kumar ◽  
Sasanka Deka
Keyword(s):  
Heterogeneous Catalyst ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Dye Degradation ◽  
Highly Active ◽  
Photocatalytic Dye Degradation

Use of hydrophilic Cu2ZnSnS4 nanoparticles as a multifunctional highly active heterogeneous catalyst: electrocatalytic water splitting, photocatalytic dye degradation and reduction of aqueous Cr(vi).

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