Nano-BFn/cellulose: a bio-based nano-catalyst for synthesis of bio-active 7-hydroxycoumarins

2022 ◽  
Author(s):  
Bi Bi Fatemeh Mirjalili ◽  
Abdolhamid Bamoniri ◽  
Seyede Azita Fazeli-Attar
Keyword(s):  
Nano Catalyst

scholarly journals Effect of calcination temperature on the properties and applications of bio extract mediated titania nano particles

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
N. Saikumari ◽  
S. Monish Dev ◽  
S. Avinaash Dev
Keyword(s):  
Electron Microscopy ◽  
Calcination Temperature ◽  
Surface Properties ◽  
Economic Feasibility ◽  
Nano Particles ◽  
Textile Dye ◽  
Gravimetric Analysis ◽  
Anatase Titania ◽  
Nano Catalyst ◽  
Bet Analysis

AbstractIn order to deal with the arising environmental issues across the globe at present nano particles with unique properties laid a benchmark in the name of nano catalysis. In this work the significance of calcination temperature on the thermal, electronic, structural and surface properties of a nano catalyst produced by sol–gel method using ultrasonic radiation against the disposal of toxic textile pollutants is studied in detail. The extract of tea leaves has been used as a bio-template during the synthesis to revise the crystallite size, surface area, optical absorption potential, and rate of agglomeration of nano sized grains by regulating their physico-chemical and surface properties. The influence of calcination in the transformation of single phased anatase titania to mixed phase anatase–rutile titania and the corresponding outcome in its photocatalytic activity employed in water treatment applications have been verified. The nano catalyst obtained is characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transition electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), Thermo gravimetric analysis (TGA), Brunaueur Emmett Teller (BET) analysis, UV–Vis diffused reflectance spectroscopy (DRS-UV–Vis) etc. The mesoporosity of the particle was examined using Barrett Joyner Halenda (BJH) model. The enhanced photo catalytic efficiency (about 97.7%) of templated nano titania due to calcination is verified against Congo red, a textile dye under optimized conditions. The nano catalyst produced can be easily separated, recycled to support its economic feasibility.

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

A practical approach for synthesis of biodiesel via non-edible seeds oils using trimetallic based montmorillonite nano-catalyst

2021 ◽  
Vol 328 ◽  
pp. 124859
Author(s):  
Mamoona Munir ◽  
Mushtaq Ahmad ◽  
Muhammad Mubashir ◽  
Saira Asif ◽  
Amir Waseem ◽  
...  
Keyword(s):  
Practical Approach ◽  
Nano Catalyst ◽  
Edible Seeds

scholarly journals A New Supported Manganese-Based Coordination Complex as a Nano-Catalyst for the Synthesis of Indazolophthalazinetriones and Investigation of Its Antibacterial Activity

Chemistry ◽  
2021 ◽  
Vol 3 (3) ◽  
pp. 783-799
Author(s):  
Maryam Ariannezhad ◽  
Davood Habibi ◽  
Somayyeh Heydari ◽  
Vahideh Khorramabadi
Keyword(s):  
Antibacterial Activity ◽  
Simple Procedure ◽  
Condensation Reaction ◽  
Antibacterial Properties ◽  
Coordination Complex ◽  
Bacterial Strains ◽  
One Pot ◽  
Nano Catalyst ◽  
Ft Ir ◽  
The One

A new magnetic supported manganese-based coordination complex (Fe3O4@SiO2@CPTMS@MBOL@ Mn) was prepared in consecutive stages and characterized via various techniques (VSM, SEM, TEM, XRD, FT-IR, EDX, TG-DTA, and ICP). To evaluate its application, it was used for synthesis of divers Indazolophthalazinetriones in a simple procedure via the one-pot three-component condensation reaction of aldehydes, dimedone, and phthalhydrazide in ethanol under reflux conditions. The Mn catalyst can be recycled without any noticeable loss in catalytic activity. Additionally, the antibacterial properties of the nano-catalyst were studied against some bacterial strains.

Silica Sol-Gel Supported Nickel Nano-Catalyst for Hydrogen Production Using Microreactors

2005 ◽  
Vol 885 ◽  
Author(s):  
Krithi Shetty ◽  
Shihuai Zhao ◽  
Wei Cao ◽  
Naidu V. Seetala ◽  
Debasish Kuila
Keyword(s):  
Steam Reforming ◽  
Average Pore Size ◽  
Sol Gel ◽  
Supported Catalyst ◽  
Silica Sol ◽  
Average Pore ◽  
Steam Reforming Of Methanol ◽  
Nano Catalyst ◽  
Before And After ◽  
Reforming Reactions

ABSTRACTThe goal of this research is to investigate the activities of a non-noble nano-catalyst (Ni/SiO2) using Si-microreactors for steam reforming of methanol to produce hydrogen for fuel cells. The supported catalyst was synthesized by sol-gel method using Ni (II) salts and Si(C2H5O)4 as starting materials. EDX results indicate that the actual loading of Ni (5-6%) is lower than the intended loading of 12 %. The specific surface area of the silica sol-gel encapsulated Ni nano-catalyst is 452 m2/g with an average pore size of ∼ 3 nm. Steam reforming reactions have been carried out in a microreactor with 50 µm channels in the temperature range of 180-240 °C and atmospheric pressure. Results show 53% conversion of methanol with a selectivity of 74 % to hydrogen at 5 l/min and 200 °C. The magnetic properties of the catalysts were performed using a Vibrating Sample Magnetometer (VSM) to study the activity of the catalysts before and after the steam reforming reactions. The VSM results indicate much higher activity in the microreactor compared to macro-reactor and Ni forms non-ferromagnetic species faster in the microreactor.

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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