scholarly journals Investigation of Catalytic Property of Plant Mediated Silver Nanoparticles as Degradation of Toxic Dyes in Water

2021 ◽  
Vol 16 (2) ◽  
Author(s):  
Satish Chandra Sati ◽  
Ankit Singh Bartwal ◽  
Sumit Ringwal ◽  
Gurpreet Kour ◽  
Rashmi Rawat ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Acridine Orange ◽  
Malachite Green ◽  
Dye Degradation ◽  
Solar Irradiation ◽  
Plant Materials ◽  
Toxic Dyes ◽  
Research Fields ◽  
Nano Catalyst ◽  
Antioxidant Agent

Nowadays, silver nano-compounds mediated by plant materials are widely used material in daily life chemistry as well as across the industries, medical, electronics, ceramics, and in all research fields, because it has some specific characteristics such as non-toxic, inexpensive, nature-friendly, heat resistant, catalytic activity, high electric conductivity and so on. In the present work we reported the photo-catalytic dye degradation of green synthesized silver nanoparticles of size 43.75 nm by using the flowers extract of Rhododendron campanulatum tree. Synthesized AgNPs have worked as a strong nano-catalyst for the degradation of toxic dyes such as malachite green (MG), and acridine orange (AO). As a catalyst, synthesized AgNPs degraded the malachite green (MG) dye 47.22 % within 90 min, and acridine orange (AO) dye 66.16 % in 4 h of solar irradiation, while in the absence of nanocatalyst, MG and AO dye degraded upto 22.13 % in 90 min and 46.75 % in 4 h of photo-irradiation respectively. Synthesized nano material (AgNPs) may be applicable as a strong catalytic agent for the degradation of toxic dyes, water purifying agent as well as a good antioxidant agent.

scholarly journals Degradation of Malachite green using heterogeneous nanophotocatalysts (NiO/TiO2, CuO/TiO2) under solar and microwave irradiation

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Chafia Djebbari ◽  
Emna zouaoui ◽  
Nesrine Ammouchi ◽  
Chafika Nakib ◽  
Daoiya Zouied ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Malachite Green ◽  
Photocatalytic Oxidation ◽  
Advanced Oxidation Process ◽  
Dye Degradation ◽  
Aqueous Suspension ◽  
Heterogeneous Photocatalysis ◽  
Solar Irradiation ◽  
Wide Range ◽  
Catalyst Type

AbstractHeterogeneous photocatalysis is an advanced oxidation process (AOP). This technique is used to degrade a wide range of pollutants in water. In this study, photocatalytic oxidation and mineralization of malachite green in an aqueous suspension containing nickel-based catalysts and copper supported on TiO2 prepared by wet diffusional impregnation was studied using two sources of irradiation: solar and microwave. Photodegradation kinetics were studied according to several parameters, such as catalyst type, dye concentration, photocatalyst mass and microwave power. The results showed that the photodegradation of malachite green is faster in the presence of CuO/TiO2 catalyst than NiO/TiO2 catalyst than TiO2. Dye degradation by microwave irradiation is faster than that by solar irradiation.

Comparative Photocatalytic Degradation of Organic Dyes Using Silver Nanoparticles Synthesized from Padina tetrastromatica

2017 ◽  
Vol 14 (1) ◽  
pp. 71-75
Author(s):  
Clara Gnana Selvi Barnabas ◽  
Jayaraman Theerthagiri ◽  
Amutha Santhanam
Keyword(s):  
Methylene Blue ◽  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Acridine Orange ◽  
Metallic Nanoparticles ◽  
Dye Degradation ◽  
Time Interval ◽  
Active Components ◽  
Ag Nps ◽  
Padina Tetrastromatica

Background: Seaweeds, being abundant sources of active components have attained much interest in recent times. The seaweeds are routinely used in life science research and are well known for their biological applications. In addition to that, the synthesis of metallic nanoparticles from these natural resources has its own attraction in drug delivery and was observed by using 2 mL of Ag NP colloids. Objective: In this study, the synthesis of silver nanoparticles (Ag NPs) using Padina tetrastromatica has been evaluated for their catalytic activity in the degradation of organic dye. Method: The catalytic activity of the biosynthesized Ag NP colloid was studied for the degradation of Methylene blue (MB) and Acridine orange (AO) dye. The degradation of methylene blue and acridine orange was observed at regular time interval by using UV-vis absorption spectra at 664 nm and 490 nm respectively. Results: The percentage of dye degradation increased in the presence of NaBH4. It was observed that 80.09% of MB dye reduction was observed by using 2 mL of Ag NP colloids. The acridine orange dye showed reduction of 83.06%. The rate constants for the reduction of Methylene blue (MB) and acridine orange (AO) dye using 2 mL Ag NPs colloids are 0.077 and 0.090 min-1, respectively.

Biogenic synthesis of copper nanoparticles from rose (Rosa indica L.) and their applications in photocatalytic degradation of Malachite Green and Carbol Fuchsin dyes

2020 ◽  
Vol 10 ◽  
Author(s):  
Manmeet Kaur ◽  
Suman Prajapati ◽  
Samneek Cholia ◽  
Jaskeet Singh Mann ◽  
Gurpreet Singh
Keyword(s):  
Photocatalytic Degradation ◽  
Malachite Green ◽  
Copper Nanoparticles ◽  
Dye Degradation ◽  
Industrial Effluent ◽  
Copper Nanoparticle ◽  
Synthesis Of Nanoparticles ◽  
Carbol Fuchsin ◽  
Double Beam ◽  
The Rose

Background: In the recent years, the green synthesis of nanoparticles has taken a lead role over the conventional chemical and physical approach due to its non-toxic, cost effective parameters and has found its place in various applications. Objectives: The major objectives of this study was to synthesise and characterize the copper nanoparticles using the rose extract at different set of conditions and analyse these nanoparticles as a source of dye degradation agent under sunlight conditions. Methods: Present study was conducted with the aim to synthesis the copper nanoparticle using the rose petal extract. The components present the in the extract act as the reduction and stabilization agents for the synthesis of CuNPs. The synthesized nanoparticles were characterized by using UV-VIS, FTIR, XRD and SEM analysis. Photocatalytic degradation of two dyes (Malachite Green and Carbol fuchsin) was analysed using double beam spectroscopic analysis Results: UV-Vis analysis indicated the presence of a peak at around 630 nm. The FT-IR analysis indicated the involvement of various biomolecules during the synthesis of nanoparticles. The structure and the conformation was elucidated using XRD and SEM showed the agglomerated form of the synthesized nanoparticles with the size range of about 60-90 nm. The synthesised copper nanoparticles was used for degradation of malachite green and carbol fuchsin dye using photocatalytic under sunlight irradiation. UV-Vis spectral analysis indicated that synthesised copper nanoparticle act more effective in degradation of malachite green (around 95%) whereas carbol fuchsin showed a maximum degradation by 52% therefore suggesting that CuNPs act as an efficient photo catalyst in dye degradation. Conclusion: The results obtained from this study indicates that rose extract has the potential of synthesis of copper nanoparticles which is non-toxic and convenient approach as compared to physical and chemical synthesis. These nanoparticles can be effectively employed as dye decolourization agents to treat industrial effluent and prevent the environmental pollution.

Photo-catalytic Study of Malachite Green Dye Degradation Using Rice Straw Extracted Activated Carbon Supported ZnO Nano-particles

2020 ◽  
Vol 10 (6) ◽  
pp. 849-859
Author(s):  
Radwa A. El-Salamony ◽  
Abeer A. Emam ◽  
Nagwa A. Badawy ◽  
Sara F. El-Morsi
Keyword(s):  
Activated Carbon ◽  
Visible Light ◽  
Rice Straw ◽  
Malachite Green ◽  
Dye Degradation ◽  
Nano Particles ◽  
Oh Radicals ◽  
Impregnation Method ◽  
Photo Degradation ◽  
Malachite Green Dye

Objective: ZnO nanoparticles were synthesized using wet impregnation method, and activated carbon from rice straw (RS) prepared through chemical route. Methods: The nano-composites ZnO-AC series were prepared with different ZnO:AC ratio of 10, 20, 50, and 70% to optimize the zinc oxide nanoparticles used. The obtained composites were characterized by FE-SEM, XRD, SBET, and optical techniques then used for the photo-degradation of Malachite green dye (MG) under visible light. Results: It was found that 10ZnO-AC exhibited excellent visible light photo-catalytic performance. The ·OH radicals’ formation is matching with photo-activity of the prepared composites. The photo-degradation efficiency of MG increased from 63% to 93%, when the 10ZnO-AC photocatalyst amount was increased from 0.5 to 6 g/L. Conclusion: The GC-MS technique was used to analyze the intermediates formed; up to 15 kinds of chemicals were identified as the degradation products.

scholarly journals Effective Heterogeneous Fenton‐Like degradation of Malachite Green Dye Using the Core‐Shell Fe 3 O 4 @SiO 2 Nano‐Catalyst

2021 ◽  
Vol 6 (4) ◽  
pp. 865-875
Author(s):  
Nafis Mahmud ◽  
Abdelbaki Benamor ◽  
Mustafa S. Nasser ◽  
Muneer M. Ba‐Abbad ◽  
Muftah H. El‐Naas ◽  
...  
Keyword(s):  
Malachite Green ◽  
Core Shell ◽  
Heterogeneous Fenton ◽  
The Core ◽  
Malachite Green Dye ◽  
Nano Catalyst

scholarly journals A Comparative Study on Dye Degradation by Leaf and Root Extracts of Parthenium hysterophorus L

2018 ◽  
Vol 6 (4) ◽  
pp. 327-331
Author(s):  
Dipesh Shahi ◽  
Rajiv Sapkota
Keyword(s):  
Malachite Green ◽  
Seedling Growth ◽  
Congo Red ◽  
Dye Degradation ◽  
Cost Effective ◽  
Germination Percentage ◽  
Parthenium Hysterophorus ◽  
Treated Wastewater ◽  
Root Extracts ◽  
Phytotoxicity Test

The use of different dyes and pigments is increasing with the increase in industrialization leading to the high production of effluent. The effluent contaminated with dyes and dye-stuff has harmful effects on public health and the environment. Thus, the treatment of effluent is essential. Biological approaches are gaining much interest due to their cost-effective and eco-friendly nature over various physicochemical methods for the treatment of dye-contaminated wastewater. This study highlights on the biodegradation of congo red and malachite green by using leaf and root extracts of Parthenium hysterophorus. The extract and the dye were mixed in the ratio of 1:2 and incubated at 40ºC for 90 minutes. Decolorization assay was performed using UV visible spectrophotometer which indicated that decolorization was due to degradation of dyes into non-colored metabolites. The leaves extract exhibited higher decolorizing activity than roots extract. The maximum decolorization for leaves extract was 55.8% (congo red) and 51.6% (malachite green). Furthermore, phytotoxicity test was carried out to determine the effect of dyes and their degradation metabolites on seed germination and seedling growth of chickpea (Cicer arietinum L). The germination percentage and seedling growth were more in degradation metabolites than untreated dyes, indicating less toxic nature of degradation metabolites. Hence, it can be inferred that P. hysterophorus extracts can be used to treat dye wastewater and treated wastewater can be used for irrigation. Int. J. Appl. Sci. Biotechnol. Vol 6(4): 327-331

Synthesis of smart bimetallic nano-Cu/Ag@SiO2for clean oxidation of alcohols

2017 ◽  
Vol 41 (22) ◽  
pp. 13377-13381 ◽  
Author(s):  
Arijit Saha ◽  
Soumen Payra ◽  
Subhash Banerjee
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Performance ◽  
Benzyl Alcohols ◽  
Nano Catalyst ◽  
Oxidation Of Alcohols

Silica (SiO2) supported bimetallic copper/silver nanoparticles (Cu/Ag@SiO2NPs) were synthesized for clean oxidation of benzoins/benzyl alcohols. All the reactions were fast, clean and high yielding (95–99%) and the Cu/Ag@SiO2nano-catalyst was reused eight times without loss of its catalytic performance.

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