Biogenic synthesis of shape-tunable Au-Pd alloy nanoparticles with enhanced catalytic activities

Chowdhury, Rakesh; Mollick, Md. Masud Rahaman; Biswas, Yajnaseni; Chattopadhyay, Dipankar; Rashid, Md. Harunar

doi:10.1016/j.jallcom.2018.05.343

Cited by 26 publications

(15 citation statements)

References 37 publications

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“…The XRD diffractogram (Fig. 4 ) shows the semi-crystalline nature of the samples and the presence of high noise confirms the leaf extract based synthesis of Au–Pd BNPs 22 . The ZP (mV) deals with the surface charge of the particles, particularly with the electrostatic repulsive forces.…”

Section: Discussionsupporting

confidence: 53%

“…However, sufficient studies are available on the synthesis of Au–Pd BNPs from different biological extracts such as ascorbic acid and Cacumen platycladi leaf extract mediated Au–Pd BNPs (~ 40 nm) showed an efficient catalytic ability for the oxidation of benzyl alcohol to benzaldehyde 32 . The mono and bi-metallic nanoparticles of Au and Pd synthesized using the flower extract of Lantana camara plant showed enhanced catalytic activity of Au–Pd BNPs as compare to the individual Au NPs and Pd NPs for the reduction of hazardous borohydride dye 22 . The fenugreek plant polysaccharide mediated Au–Pd BNPs also showed heterogeneous catalytic hydrogenation of toxic 4-nitrophenol to the environmental friendly 4-aminophenol compounds 36 .…”

Section: Discussionmentioning

confidence: 99%

“…The study on the different bimetallic NPs can show unique properties in terms of its synergistic or antagonistic combinatorial activity 19 – 21 . The studies on the evaluation of an eco-friendly extract mediated Au–Pd BNPs are known for its enhanced catalytic activity in comparison to their monometallic forms 22 . The availability of data on the use of monometallic Au NPs and Pd NPs in the area of catalysis, protein microsensors activity, imaging, and bioassay suggest the possibility for the use of the current biosynthesized Au–Pd BNPs in many areas in addition to its use in mosquito control 23 – 29 .…”

Section: Introductionmentioning

confidence: 99%

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Laboratory analysis of Au–Pd bimetallic nanoparticles synthesized with Citrus limon leaf extract and its efficacy on mosquito larvae and non-target organisms

Minal

Prakash

2020

Sci Rep

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The current study provides novel results on the synthesis of bimetallic nanoparticles (BNPs) of gold and palladium (Au–Pd) with an eco-friendly and non-toxic aqueous leaf extract of plant Citrus limon. The BNPs were characterized and toxicity bioassay was examined on the larvae of the pathogen vectors such as Anopheles stephensi and Aedes aegypti mosquitoes. The predation efficiency test was evaluated on the invertebrate non-target organisms such as natural predatory nymphs of dragonfly and damselfly. The results of material characterization using UV VIS spectroscopy confirmed the synthesis of Au–Pd BNPs with the appearance of the SPR bands. FT-IR spectroscopy indicates the presence of functional groups containing high amounts of nitro compounds and amines on the surface of BNPs. TEM result shows the presence of spherical polydisperse Au–Pd BNPs in the sample. The XRD pattern displayed the semi-crystalline nature and the changes in the hydrodynamic size and surface potential was determined for the sample at 0 h, 24 h, 48 h, and 72 h of synthesis through DLS and ZP analysis. Au–Pd BNPs Bioassay provided the effective lethal concentrations (LC50) against the I–IV instar larvae of An. stephensi and Ae. aegypti after 24 h, 48 h, and 72 h of exposure. The LC50 obtained from the larvicidal bioassay was used to test its effect on the predation efficiency of the selected nymphs which showed increased predation from 40 to 48 h of exposure as compared to the negative control. Hereby, we conclude that Au–Pd BNPs bioassay shows toxic mosquito larvicidal activity at the selected concentration with no lethal effect on the predation efficiency of the selected stage of the predatory non-target aquatic invertebrate insects.

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Section: Discussionsupporting

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Laboratory analysis of Au–Pd bimetallic nanoparticles synthesized with Citrus limon leaf extract and its efficacy on mosquito larvae and non-target organisms

Minal

Prakash

2020

Sci Rep

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“…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: 99%

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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“…These particles had a rate constant of 0.230 s –1 for the reduction of MB. 67 Shaik et al tested the catalytic activity of Au triangular nanoplates versus spherical nanoparticles inside of mesoporous hollow silica shells. 68 The rate constants for the two nanoparticles were 2.6 × 10 –3 and 1.03 × 10 –3 s –1 .…”

Section: Resultsmentioning

confidence: 99%

Photochemical Synthesis and Catalytic Applications of Gold Nanoplates Fabricated Using Quercetin Diphosphate Macromolecules

et al. 2019

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The demand for safer design and synthesis of gold nanoparticles (AuNPs) is on the increase with the ultimate goal of producing clean nanomaterials for biological applications. We hereby present a rapid, greener, and photochemical synthesis of gold nanoplates with sizes ranging from 10 to 200 nm using water-soluble quercetin diphosphate (QDP) macromolecules. The synthesis was achieved in water without the use of surfactants, reducing agents, or polymers. The edge length of the triangular nanoplates ranged from 50 to 1200 nm. Furthermore, the reduction of methylene blue was used to investigate the catalytic activity of AuNPs. The catalytic activity of triangular AuNPs was three times higher than that of the spherical AuNPs based on kinetic rate constants ( k ). The rate constants were 3.44 × 10 –2 and 1.11 × 10 –2 s –1 for triangular and spherical AuNPs, respectively. The X-ray diffraction data of gold nanoplates synthesized by this method exhibited that the nanocrystals were mainly dominated by (111) facets which are in agreement to the nanoplates synthesized by using thermal and chemical approaches. The calculated relative diffraction peak intensity of (200), (220), and (311) in comparison with (111) was found to be 0.35, 0.17, and 0.15, respectively, which were lower than the corresponding standard values (JCPDS 04-0784). For example, (200)/(111) = 0.35 compared to 0.52 obtained from the standard (JCPDS 04-0784), indicating that the gold nanoplates are dominated by (111) facets. The calculated lattice from selected area electron diffraction data of the as-synthesized and after 1 year nanoplates was 4.060 and 4.088 Å, respectively. Our calculations were found to be in agreement with 4.078 Å for face-centered cubic gold (JCPDS 04-0784) and literature values of 4.07 Å. The computed QDP–Au complex demonstrated that the reduction process took place in the B ring of QDP. This approach contributes immensely to promoting the ideals of sustainable nanotechnology by eradicating the use of hazardous and toxic organic solvents.

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Biogenic synthesis of shape-tunable Au-Pd alloy nanoparticles with enhanced catalytic activities

Cited by 26 publications

References 37 publications

Laboratory analysis of Au–Pd bimetallic nanoparticles synthesized with Citrus limon leaf extract and its efficacy on mosquito larvae and non-target organisms

Laboratory analysis of Au–Pd bimetallic nanoparticles synthesized with Citrus limon leaf extract and its efficacy on mosquito larvae and non-target organisms

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

Photochemical Synthesis and Catalytic Applications of Gold Nanoplates Fabricated Using Quercetin Diphosphate Macromolecules

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