Use of Invasive Weed to Synthesize Shape-Tunable Gold Nanoparticles and Evaluation of their Catalytic Activities in Dye Reduction

Phukan, Shreemoyee; Kakati, Dwipen; Rashid, Md. Harunar

doi:10.2174/1573413714666180410155346

Cited by 12 publications

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“…The phytochemicals from the flowers of wild growing Lantana camara were isolated by following the previously reported method . For the synthesis purpose, a 4.0 gL −1 solution of the extract was prepared in distilled water.…”

Section: Methodsmentioning

confidence: 99%

“…Also it is reported that polyphenolics can be extracted efficiently using water as extracting solvent which also increases the versatility of the process as it further minimizes the use of toxic solvents . The polyphenolics act as better green reducing agents for noble metal and other transition metal ions . Considering these aspects, we believe that the use of flower extract of Lantana camara as reducing‐cum‐stabilizing agent for the preparation of Pd NPs can provide a new platform to this noxious plant making it a value‐added weed for nanotechnology‐based industries in future.…”

Section: Introductionmentioning

confidence: 96%

“…Hence, there is immense interest in recent years in developing environmentally friendly and sustainable methods for the synthesis of Pd NPs. In this regard, the biogenic method involving plant extract has received considerable attention because; such methods are considered to be very effective in developing a rapid, clean, nontoxic, and eco‐friendly technology . Another advantage associated with the use of plant extract is that no additional capping agent or stabilizer is required as phytochemicals present in the plant extract or their by‐product formed during reaction stabilize the formed Pd NPs .…”

Section: Introductionmentioning

confidence: 99%

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Green chemical synthesis of Pd nanoparticles for use as efficient catalyst in Suzuki‐Miyaura cross‐coupling reaction

Phukan

Mahanta

Kakati

et al. 2018

Applied Organom Chemis

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Herein, we report the synthesis of tiny spherical Pd nanoparticles (NPs) by green chemical method under ambient conditions using flower extract of Lantana camara plant. The size of the Pd NPs is tunable from 4.7 to 6.3 nm by systematically controlling the concentration of either metal ions or plant extract. The synthesized Pd NPs were well characterized by different spectroscopic, microscopic and diffractometric techniques. The Pd NPs offered good size‐dependent catalytic activity in the Suzuki‐Miyaura C‐C coupling reaction under mild reaction conditions in (1: 1) water‐ethanol mixture. The catalyst is stable and exhibited excellent reusability up to three cycles of coupling reaction after which the catalytic activity decreases.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Green chemical synthesis of Pd nanoparticles for use as efficient catalyst in Suzuki‐Miyaura cross‐coupling reaction

Phukan

Mahanta

Kakati

et al. 2018

Applied Organom Chemis

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“…Various researchers have reported about the green synthesis of CuO nanoparticles from various plant extract such as Aloe vera, , Terminalia phanerophlebia, Gloriosa superba, Psidium guajava, Solanum nigrum, Abutilon indicum, Lantana camara, and Malva sylvestris . This phytomediated method using different plant extracts is considered an innovative, low-cost, and modest approach for synthesizing CuO nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…The merit of greensynthesized CuO-based system over the chemically synthesized system is that it not only decreases the risk to human health and environmental pollution but can also help to produce sensors with the appropriate microstructure that provides a remarkable response to the target gas. 42 Various researchers have reported about the green synthesis of CuO nanoparticles from various plant extract such as Aloe vera, 43,44 Terminalia phanerophlebia, 45 Gloriosa superba, 46 Psidium guajava, 47 Solanum nigrum, 48 Abutilon indicum, 49 Lantana camara, 50 and Malva sylvestris. 51 This phytomediated method using different plant extracts is considered an innovative, low-cost, and modest approach for synthesizing CuO nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Ocimum sanctum Leaf Extract-Assisted Green Synthesis of Pd-Doped CuO Nanoparticles for Highly Sensitive and Selective NO₂ Gas Sensors

et al. 2023

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In view of facile, cost-effective, and environmentally friendly synthetic methods, palladium-doped copper oxide (Pd-CuO) nanoparticles have been synthesized from Ocimum sanctum (commonly known as "Tulsi") phytoextract for gas-sensing applications. The structural, morphological, and compositional properties of Pd-doped CuO nanoparticles were studied using various techniques such as XRD, FESEM, XPS, and EDX. The characterization results confirmed the doping of Pd on CuO nanoparticles, and Pd-CuO nanostructures appear as nanoflakes in FESEM analysis. The gas-sensing response of Pd (1.12 wt %)-CuO nanoflake-based sensor was measured at 5−100 ppm concentration of different gases, NO 2 , H 2 S, NH 3 , and H 2 , at 125 °C. Gas-sensing tests reveal that the sensitivity of the sensor were 81.7 and 38.9% for 100 and 5 ppm concentrations of NO 2, respectively, which was significantly greater than that of pure CuO. The response and recovery times of the sensor were 72 and 98 s for 100 ppm of NO 2 gas, while they were 90 and 50 s for 5 ppm NO 2 . The calculated limit of detection (LOD) value of the sensor is 0.8235. This appealing LOD is suitable for real-time gas detection. The gas sensor was found to exhibit excellent selectivity toward NO 2 gas and repeatability and stability in humid (80%) conditions. The Pd doping in CuO nanostructures plays a significant role in escalating the sensitivity and selectivity of CuO-based NO 2 gas sensor suitable to work at low operating temperatures.

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Green Chemical Synthesis of Cube‐Shaped CuFe₂O₄ Nanoparticles for Use as Magnetically Retrievable Catalysts in A³ Coupling Reactions

Kalita,

Iraqui,

Sarmah

et al. 2024

Applied Organom Chemis

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A3 coupling reaction is a multicomponent reaction (MCR) involving aryl aldehydes, phenyl acetylenes and amines to synthesize a variety of biologically active propargylamine derivatives. Herein, we report the preparation of cube‐shaped CuFe2O4 nanoparticles (NPs) via the hydrothermal method in the presence of Lantana camara flower (LCF) extract to use them as catalysts to synthesize propargylamine derivatives. X‐ray diffraction study confirms the formation of CuFe2O4 NPs with cubic spinel structures. In the presence of LCF extract, cube‐shaped CuFe2O4 NPs are formed predominantly irrespective of the type of alkali used as the hydrolyzing agent. However, a mixture of nearly spherical and cube‐shaped particles has been formed in the absence of additives. The synthesized CuFe2O4 NPs exhibit superparamagnetic behaviour and are magnetically ordered. The synthesized cube‐shaped CuFe2O4 NPs exhibit excellent catalytic activity in the A3 coupling reaction between benzaldehyde, piperidine and phenylacetylene to give propargylamine with a yield of 90% under the optimum conditions. The catalyst is highly stable and magnetically retrievable facilitating reusability for up to five cycles without considerable loss of catalytic activity. The protocol is suitable for the synthesis of a diverse range of propargylamine derivatives with moderate to excellent yield.

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Use of Invasive Weed to Synthesize Shape-Tunable Gold Nanoparticles and Evaluation of their Catalytic Activities in Dye Reduction

Cited by 12 publications

References 0 publications

Green chemical synthesis of Pd nanoparticles for use as efficient catalyst in Suzuki‐Miyaura cross‐coupling reaction

Green chemical synthesis of Pd nanoparticles for use as efficient catalyst in Suzuki‐Miyaura cross‐coupling reaction

Ocimum sanctum Leaf Extract-Assisted Green Synthesis of Pd-Doped CuO Nanoparticles for Highly Sensitive and Selective NO₂ Gas Sensors

Green Chemical Synthesis of Cube‐Shaped CuFe₂O₄ Nanoparticles for Use as Magnetically Retrievable Catalysts in A³ Coupling Reactions

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Use of Invasive Weed to Synthesize Shape-Tunable Gold Nanoparticles and Evaluation of their Catalytic Activities in Dye Reduction

Cited by 12 publications

References 0 publications

Green chemical synthesis of Pd nanoparticles for use as efficient catalyst in Suzuki‐Miyaura cross‐coupling reaction

Green chemical synthesis of Pd nanoparticles for use as efficient catalyst in Suzuki‐Miyaura cross‐coupling reaction

Ocimum sanctum Leaf Extract-Assisted Green Synthesis of Pd-Doped CuO Nanoparticles for Highly Sensitive and Selective NO2 Gas Sensors

Green Chemical Synthesis of Cube‐Shaped CuFe2O4 Nanoparticles for Use as Magnetically Retrievable Catalysts in A3 Coupling Reactions

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Product

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Ocimum sanctum Leaf Extract-Assisted Green Synthesis of Pd-Doped CuO Nanoparticles for Highly Sensitive and Selective NO₂ Gas Sensors

Green Chemical Synthesis of Cube‐Shaped CuFe₂O₄ Nanoparticles for Use as Magnetically Retrievable Catalysts in A³ Coupling Reactions