scholarly journals Electrocatalytic Glucose Oxidation at Coral-Like Pd/C3N4-C Nanocomposites in Alkaline Media

Catalysts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 440 ◽  
Author(s):  
Guang Dong ◽  
Qingqing Lu ◽  
Haihui Jiang ◽  
Chunfang Li ◽  
Yingying Gong ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
Reduction Method ◽  
Chemical Reduction ◽  
High Sensitivity ◽  
Pd Nanoparticles ◽  
Glucose Sensing ◽  
Alkaline Media ◽  
Chemical Reduction Method ◽  
One Pot ◽  
Glucose Electrooxidation

Porous coral-like Pd/C3N4-C nanocomposites are fabricated by a simple one-pot chemical reduction method. Their electrocatalytic performance is ~50% higher than a carbon-loaded palladium electrocatalyst (Pd/C) in alkaline media. This confirms that the glucose electrooxidation and sensing performance of a Pd/C can be improved by the synergy of graphitic carbon nitride (C3N4), though C3N4 exhibits poor electrical conductivity. Compared to Pd/C, the size of Pd nanoparticles in Pd/C3N4-C decreases. As a result, the activity of Pd/C3N4-C is enhanced due to the higher dispersion and the synergistic effect. Pd/C3N4-C presents a rapid response and high sensitivity to glucose. The sensitivity for glucose sensing at Pd/C3N4-C is 3.3 times that of at Pd/C in the range of 0.001–10 mM. In the lower range of 0.001–1 mM, the sensitivity at Pd/C3N4-C is ~10 times greater than Pd/C.

Preparation of Pd@Gr Composite Materials and Research on Catalytic Performance

2019 ◽  
Vol 944 ◽  
pp. 671-677
Author(s):  
Jin Feng Leng ◽  
Kang Wang ◽  
Chang Peng Xia
Keyword(s):  
Reduction Method ◽  
Chemical Reduction ◽  
Great Influence ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
Chemical Oxidation ◽  
Chemical Reduction Method ◽  
Graphene Surface ◽  
Oxidation Reduction

In this work, the preparation of graphene by chemical oxidation reduction method and a series of chemical reactions to get graphene oxide, with the preparation of graphene composites by simply chemical reduction method for the preparation of palladium/graphene composites. Through the chemical reduction method, the small size of Pd nanoparticles is acquired by controlling the content of reducing agent. The Pd nanoparticles on graphene surface is 10nm size and evenly distributed. Pd2+ adsorption on graphene surface and in situ were partially reduced to Pd to Pd2+ nanoparticles by the reducibility of graphene. In the process, the graphene was reduced to graphene and the final compound was thinner and more transparent than the pre-experiment oxide. The oxygen-containing functional groups on the surface of the graphene have influence to the nucleation and growth of metal nanoparticles and KI can control the morphology and size of nanoparticles. The particle size and dispersion uniformity have great influence on the catalytic performance of composites, the smaller particles have better catalytic performance. Keywords:palladium, graphene composites, nanoparticles

Nanoscale water soluble self-assembled zero-valent iron: role of stabilizers in their morphology

RSC Advances ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 7267-7278 ◽  
Author(s):  
Zaheer Khan ◽  
Shaeel Ahmed AL-Thabaiti ◽  
Shokit Hussain
Keyword(s):  
Aqueous Solution ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Water Soluble ◽  
Zero Valent Iron ◽  
Nano Composites ◽  
Chemical Reduction Method ◽  
One Pot ◽  
Self Assembled

Self-assembled water soluble sheet-like zero-valent iron nano-composites were prepared using a simple one-pot chemical reduction method in an aqueous solution of FeCl3and NaBH4both with and without CTAB and SDS.

Chemically reduced graphene oxide–P25–Au nanocomposite materials and their photoelectrocatalytic and photocatalytic applications

2016 ◽  
Vol 15 (10) ◽  
pp. 1310-1317 ◽  
Author(s):  
Raju Praveen ◽  
Ramasamy Ramaraj
Keyword(s):  
Reduction Method ◽  
Chemical Reduction ◽  
Nanocomposite Materials ◽  
Chemical Reduction Method ◽  
One Pot ◽  
Photoelectrocatalytic Oxidation ◽  
Oxidation Of Methanol ◽  
Reduced Graphene ◽  
Chemically Reduced Graphene Oxide ◽  
Photocatalytic Applications

CRGO–P25–Au NCMs were prepared through a one-pot chemical reduction method. Photoelectrocatalytic oxidation of methanol with high photocurrent and photocatalytic reduction of Cr(vi) ions to Cr(iii) ions were demonstrated.

scholarly journals Preparation and Characterization of Gold Nanoparticles in Chitosan Suspension by One-Pot Chemical Reduction Method

Nano Hybrids ◽  
2014 ◽  
Vol 6 ◽  
pp. 47-57 ◽  
Author(s):  
R. Lakshmi Narayanan ◽  
M. Sivakumar
Keyword(s):  
Gold Nanoparticles ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Chemical Reduction Method ◽  
One Pot ◽  
Electron Transfer Mechanism ◽  
Potential Measurement ◽  
Protonated Amine ◽  
Amine Groups

Gold nanoparticles were synthesized in chitosan suspension by one-pot chemical reduction method without any chemical reducing reagent. In aqueous acidic medium, chitosan exhibits polycationic nature due to protonation of amine groups of each glucosamine repeating units. The adsorption of AuCl4- ions occurs on chitosan through electrostatic attraction and further reduction of Au3+ to Au0 proceeds through a three electron transfer mechanism by oxidation of protonated amine groups of chitosan chain. The change of color from dirty yellow to intense red indicates the formation of gold nanoparticles in chitosan suspension which acts as both reducing and stabilizing agent. Characterization techniques such as UV-VIS, FTIR, Zeta potential measurement, FESEM and TEM were carried out in order to examine the reduction and stabilization phenomena rendered by chitosan.

Facile synthesis of Pt–Pd nanodendrites and their superior electrocatalytic activity

2014 ◽  
Vol 2 (12) ◽  
pp. 4384-4390 ◽  
Author(s):  
Jing-Jing Lv ◽  
Jie-Ning Zheng ◽  
Shan-Shan Li ◽  
Li-Li Chen ◽  
Ai-Jun Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ethylene Glycol ◽  
Electrocatalytic Activity ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Alkaline Media ◽  
High Catalytic Activity ◽  
Chemical Reduction Method ◽  
Facile Synthesis ◽  
Electrooxidation Of Methanol

Porous Pt–Pd nanodendrites were fabricated by a co-chemical reduction method using both PVP and urea as the co-stabilizing and co-structure-directing agents. The Pt–Pd nanodendrites displayed high catalytic activity and stability toward the electrooxidation of methanol and ethylene glycol in alkaline media.

scholarly journals Highly Sensitive and Stable Copper-Based SERS Chips Prepared by a Chemical Reduction Method

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2770
Author(s):  
Pei Dai ◽  
Haochen Li ◽  
Xianzhi Huang ◽  
Nan Wang ◽  
Lihua Zhu
Keyword(s):  
Enhancement Factor ◽  
Reduction Method ◽  
Limit Of Detection ◽  
Chemical Reduction ◽  
High Sensitivity ◽  
Quantitative Detection ◽  
Chemical Reduction Method ◽  
Coated Fabric ◽  
The Stability ◽  
Sers Intensity

Cu chips are cheaper than Ag and Au chips for practical SERS applications. However, copper substrates generally have weak SERS enhancement effects and poor stability. In the present work, Cu-based SERS chips with high sensitivity and stability were developed by a chemical reduction method. In the preparation process, Cu NPs were densely deposited onto fabric supports. The as-prepared Cu-coated fabric was hydrophobic with fairly good SERS performance. The Cu-coated fabric was able to be used as a SERS chip to detect crystal violet, and it exhibited an enhancement factor of 2.0 × 106 and gave a limit of detection (LOD) as low as 10–8 M. The hydrophobicity of the Cu membrane on the fabric is favorable to cleaning background interference signals and promoting the stability of Cu NPs to environment oxidation. However, this Cu SERS chip was still poor in its long-term stability. The SERS intensity on the chip was decreased to 18% of the original one after it was stored in air for 60 days. A simple introduction of Ag onto the clean Cu surface was achieved by a replacement reaction to further enhance the SERS performances of the Cu chips. The Ag-modified Cu chips showed an increase of the enhancement factor to 7.6 × 106 due to the plasmonic coupling between Cu and Ag in nanoscale, and decreased the LOD of CV to 10–11 M by three orders of magnitude. Owing to the additional protection of Ag shell, the SERS intensity of the Cu-Ag chip after a two-month storing maintained 80% of the original intensity. The Cu-Ag SERS chips were also applied to detect other organics, and showing wide linearity range and low LOD values for the quantitative detection.

One-step synthesis of nitrogen-doped graphene supported PdSn bimetallic catalysts for ethanol oxidation in alkaline media

RSC Advances ◽  
2016 ◽  
Vol 6 (23) ◽  
pp. 19314-19321 ◽  
Author(s):  
Yue Feng ◽  
Duan Bin ◽  
Ke Zhang ◽  
Fangfang Ren ◽  
Jin Wang ◽  
...  
Keyword(s):  
Bimetallic Catalysts ◽  
Ethanol Oxidation ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Alkaline Media ◽  
Chemical Reduction Method ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
One Step

In this paper, a facile chemical reduction method was employed to synthesize bimetallic PdSn nanocatalysts, and the nitrogen-doped graphene (N-G) has been used as a conductive support material for PdSn catalysts.

scholarly journals Facile synthesis of urchin-like RuCu and hollow RuCuMo nanoparticles and preliminary insight to their formation process by cyclic voltammetry

RSC Advances ◽  
2018 ◽  
Vol 8 (26) ◽  
pp. 14138-14143 ◽  
Author(s):  
Yanna Song ◽  
Jingcheng Sun ◽  
Yanru Zhang ◽  
Bingxin Wang ◽  
Qiang Li ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Formation Process ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Chemical Reduction Method ◽  
Facile Synthesis ◽  
One Pot

The urchin-like RuCu and hollow RuCuMo nanocrystals were synthesized by one-pot chemical reduction method. The formation process of these nanocrystals was traced by cyclic voltammetry.

Antimicrobial Activity of Silver Nanoparticles Prepared Under an Ultrasonic Field

2011 ◽  
Vol 4 (3) ◽  
pp. 1491-1496
Author(s):  
Umadevi M ◽  
Rani T ◽  
Balakrishnan T ◽  
Ramanibai R
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Reduction Method ◽  
Therapeutic Potential ◽  
Chemical Reduction ◽  
Ultrasonic Field ◽  
Great Promise ◽  
Chemical Reduction Method ◽  
E Coli

Nanotechnology has great promise for improving the therapeutic potential of medicinal molecules and related agents. In this study, silver nanoparticles of different sizes were synthesized in an ultrasonic field using the chemical reduction method with sodium borohydride as a reducing agent. The size effect of silver nanoparticles on antimicrobial activity were tested against the microorganisms Staphylococcus aureus (MTCC No. 96), Bacillus subtilis (MTCC No. 441), Streptococcus mutans (MTCC No. 497), Escherichia coli (MTCC No. 739) and Pseudomonas aeruginosa (MTCC No. 1934). The results shows that B. subtilis, and E. coli were more sensitive to silver nanoparticles and its size, indicating the superior antimicrobial efficacy of silver nanoparticles. 

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