scholarly journals Review on green carbon dot-based materials for the photocatalytic degradation of dyes: fundamentals and future perspective

2021 ◽  
Author(s):  
Nivetha Basavaraj ◽  
Anithadevi Sekar ◽  
Rakhi Yadav
Keyword(s):  
Photocatalytic Degradation ◽  
Dye Degradation ◽  
Future Perspective ◽  
Carbon Dot ◽  
Fundamental Properties ◽  
Degradation Of Dyes ◽  
Photocatalytic Dye Degradation

Systematic illustration of CDs derived from green sources for potential photocatalytic dye degradation by altering the fundamental properties.

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 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.

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.

scholarly journals Microwave-assisted hydrothermal synthesis of chrysanthemum-like Ag/ZnO prismatic nanorods and their photocatalytic properties with multiple modes for dye degradation and hydrogen production

RSC Advances ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 6027-6038 ◽  
Author(s):  
Zichan Xin ◽  
Li Li ◽  
Xiuli Zhang ◽  
Wenzhi Zhang
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrogen Production ◽  
Photocatalytic Degradation ◽  
Dye Degradation ◽  
Photocatalytic Properties ◽  
Multiple Modes ◽  
Microwave Assisted ◽  
Degradation Of Dyes

A series of chrysanthemum-like composites Ag/ZnO were prepared by the microwave-assisted hydrothermal synthesis, which well showed the ability of photocatalytic degradation of dyes and hydrogen production.

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 Transition Metal Oxides and Their Composites for Photocatalytic Dye Degradation

2021 ◽  
Vol 5 (3) ◽  
pp. 82
Author(s):  
Preety Ahuja ◽  
Sanjeev Kumar Ujjain ◽  
Rajni Kanojia ◽  
Pankaj Attri
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Dye Degradation ◽  
Carbon Composites ◽  
Dye Sensitization ◽  
Degradation Of Dyes ◽  
Flexible Surface ◽  
Photocatalytic Dye Degradation ◽  
Future Utilization

Transition metal oxides (TMO) and their carbon composites have become a glittering upcoming material science candidate. Their interesting properties, such as their meticulous morphology, plentiful availability, flexible surface chemistry along with outstanding mechanical, thermal, and optical properties make them ideal for efficient photocatalytic dye degradation. An extensive range of TMO, and their carbon composites are reviewed highlighting the progression and opportunities for the photocatalytic degradation of dyes. Here, we concisely describe the numerous techniques to extend the optical absorption of these TMOs involving dye sensitization, metal doping, etc. Besides this, an overview of all aspects of dye degradation along with the prevailing challenges for future utilization and development of such nanocomposites towards highly efficient dye degradation system are also reported.

scholarly journals Photocatalytic degradation of dyes in water by analytical reagent grades ZnO, TiO<sub>2</sub> and SnO<sub>2</sub>: a comparative study

2017 ◽  
Vol 10 (2) ◽  
pp. 109-117 ◽  
Author(s):  
Dnyaneshwar R. Shinde ◽  
Popat S. Tambade ◽  
Manohar G. Chaskar ◽  
Kisan M. Gadave
Keyword(s):  
Photocatalytic Activity ◽  
Metal Oxides ◽  
Photocatalytic Degradation ◽  
Diffuse Reflectance Spectroscopy ◽  
Dye Degradation ◽  
Low Cost ◽  
Solar Irradiation ◽  
Degradation Of Dyes ◽  
Photocatalytic Activities ◽  
Analytical Reagent

Abstract. In this study, we evaluated the photocatalytic activities of analytical reagent (AR) grade ZnO, TiO2, and SnO2 to identify a low-cost photocatalyst for dye degradation. The obtained samples of ZnO, TiO2, and SnO2 were characterised by X-ray diffractogram (XRD), scanning electron microscope imaging, and UV-VIS diffuse reflectance spectroscopy. The decolourisation of three structurally diverse dyes, namely crystal violet, basic blue, and methyl red under solar irradiation, was used to evaluate the photocatalytic activities of three metal oxides. The photocatalytic activities of the received three metal oxides were tested with the photocatalytic degradation of dyes and compared with Degussa P-25. Dye solutions with each metal oxide at initial pH 9 were subjected to irradiation under sunlight and monitored for up to the stage of complete decolourisation. The results indicate that ZnO exhibited the highest photocatalytic activity as compared to TiO2 and SnO2 as well as that of Degussa P-25 (TiO2). The photocatalytic dye decolourisation rates with ZnO were 1.14–1.35, 1.70–3.1, and 4–8.5 times higher than those of the Degussa P-25, TiO2, and SnO2, respectively. The percentage COD removal was studied for ZnO and partial removal was observed at the decolourisation stage. To enhance photocatalytic activity of AR grade ZnO, it was loaded with Ag metal and about 20 % enhancement in the activity was observed.

scholarly journals Rapid photocatalytic degradation of methylene blue, tartrazine and brilliant green dyes by high-flux UV irradiation photolysis reactor

2019 ◽  
Vol 51 (3) ◽  
pp. 337-341
Author(s):  
R. Rehman ◽  
W. Uz-Zaman ◽  
A. Abbas ◽  
L. Mitu
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Brilliant Green ◽  
Dye Degradation ◽  
High Flux ◽  
Optimal Result ◽  
First Order ◽  
First Order Kinetics ◽  
Degradation Of Dyes ◽  
Uv Visible

The aim of this work was to investigate the removal of dyes from wastewater by photocatalytic degradation using a modified assembly of photolysis reactor. It was more efficient and dye degradation occurred very fast. UV/Visible spectrophotometry was used to monitor the reaction. The degradation of dyes with different catalysts was compared and found to follow first-order kinetics. The optimal result for Methylene Blue was t(1/2)=4 min, k = 0.4471 min-1, R2 = 0.9650, for Tartrazine - t(1/2) = 1.2 min, k = 0.9723 min-1, R2 = 0.9980 and for Brilliant Green - t(1/2) = 0.8 min, k = 0.9716 min-1, R2 = 0.9938. So, it can be efficiently employed on a larger scale. Keywords: Methylene Blue, Tartrazine, Brilliant Green, Photolysis, Degradation.

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