نتایج جستجو برای: green nanocatalyst

تعداد نتایج: 140791  

Journal: :Processes 2023

The green chemistry method for nanocatalyst synthesis along with environmentally feasible non-edible sources are promising alternatives to fossil fuels. current study focuses on the of copper oxide phyto-nanocatalyst and identification a new renewable feedstock, Citrullus colocynthis, reduce environmental pollution. highest biodiesel yield (95%) was obtained under optimum conditions 1:8 oil-to-...

Journal: :iranian journal of catalysis 2015
abdolkarim zare fereshteh abi vahid khakyzadeh ahmad reza moosavi-zare alireza hasaninejad

nanomagnetite-fe3o4 is used as a highly efficient, mild, green and recyclable nanomagnetite catalyst for the synthesis of 4,4´-(arylmethylene)-bis(3-methyl-1-phenyl-1h-pyrazol-5-ol) derivatives in solvent-free conditions. the condensation reaction of 3-methyl-1-phenyl-1h-pyrazol-5(4h)-one with aromatic aldehydes affords the title compounds in high yields and short reaction times. the nanocataly...

Journal: :Catalysts 2021

The synthesis of esters is one the most fundamental and significant subjects in organic chemistry chemical industry because they are used high-value products such as cosmetics, biofuel, pharmaceuticals, surfactants, food ingredients. In this study, an efficient, economic, sustainable, green protocol for oxidative esterification reaction has been developed. A one-pot direct transformation alipha...

Journal: :Dalton transactions 2012
John Mondal Tapas Sen Asim Bhaumik

A magnetic nanoparticle conjugated mesoporous nanocatalyst (Fe(3)O(4)@mesoporous SBA-15) with a high surface area has been synthesized by chemical conjugation of magnetite (Fe(3)O(4)) nanoparticles with functionalized mesoporous SBA-15. Functionalized mesoporous SBA-15 containing surface carboxyl and amino groups was synthesized via the thiol-ene click reaction of cysteine hydrochloride and vin...

Journal: :Journal of water and health 2013
Ariadna A Morales Rafael Schouwenaars Heriberto Pfeiffer Rosa María Ramírez-Zamora

Inactivation tests of Ascaris eggs (Ae) were performed using hydrogen peroxide and a Fenton type nanocatalyst supported on activated carbon (AC) (FeOx/C). Blank inactivation tests were also carried out using H2O2 and H2O2/AC as oxidation systems. The FeOx/C nanocatalyst was synthesized through a novel hybrid method developed in this work. The method is based on the incipient impregnation techni...

2015
Lin Zhong Chokkalingam Anand Kripal Singh Lakhi Geoffrey Lawrence Ajayan Vinu

Recently, mesoporous carbon nitride (MCN) has aroused extensive interest for its potential applications in organocatalysis, photo- and electrochemistry and CO2 capture. However, further surface functionalization of MCN for advanced nanomaterials and catalysis still remains very challenging. Here we show that acidic carboxyl groups can be smoothly introduced onto the surface of well-ordered MCN ...

Journal: :Small 2017
Mengqiao Li Ning Zhang Ran Long Wei Ye Chengming Wang Yujie Xiong

Low power consumption and minimal potential hazards are ultimate goals for the modern development of chemical manufacturing; however, it often reduces the selectivity of chemical reactions by implementing a new reaction system. A nanocatalyst design is reported for achieving efficient and selective alkyne semihydrogenation through the photocatalytic hydrogen transfer from water, which avoids th...

Journal: :iranian chemical communication 2015
navabeh nami mehdi forouzani hassan ghasemnejad-bosra omid khalilpour tylami

one-pot reaction of aldehydes or ketons with aniline derivatives was performed using nabh4 and fe3o4 magnetic nanoparticles (mnps). the optimum amount of fe3o4 mnps was 5 mol% under solvent free condition. the corresponding products were obtained in good to excellent yields. the magnetically recoverable iron oxide nanoparticles are found to be efficient for synthesis of amine derivatives. these...

2017
Sandeep Patil Gunjan Chaudhari Jayasinh Paradeshi Raghunath Mahajan Bhushan L. Chaudhari

In the present study, microwave-assisted, optimized, instant, Terminalia bellirica fruit extract-mediated green synthesis of colloidal silver nanoparticles (AgNPs) has been reported. The synthesized AgNPs were characterized by UV-Vis spectroscopy, FTIR, Zetasizer, FESEM, EDX and XRD. The characteristic surface plasmon peak of reaction mixture at 406 nm confirmed the synthesis of AgNPs. The FTIR...

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