scholarly journals Fabrication of Pore-Selective Metal-Nanoparticle-Functionalized Honeycomb Films via the Breath Figure Accompanied by In Situ Reduction

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 316
Author(s):  
Yongjiang Li ◽  
Xiaoyan Ma ◽  
Jingyu Ma ◽  
Zongwu Zhang ◽  
Zhaoqi Niu ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Metal Salt ◽  
Surface Enhanced Raman Spectroscopy ◽  
Reduction Reaction ◽  
Metal Nanoparticle ◽  
In Situ Reduction ◽  
Promoting Effect ◽  
Breath Figure ◽  
Breath Figure Method

Honeycomb films pore-filled with metal (Au, Ag, and Cu) nanoparticles were successfully prepared by combining the breath figure method and an in situ reduction reaction. First, a polyhedral oligomeric silsesquioxane (POSS)-based star-shaped polymer solution containing metal salt was cast under humid conditions for the formation of honeycomb films pore-filled with metal salt through the breath figure method. The morphology of the honeycomb films was mainly affected by the polymer molecular structure and the metal salt. Interestingly, the promoting effect of the metal salt in the breath figure process was also observed. Then, honeycomb films pore-filled with metal nanoparticles were obtained by in situ reduction of the honeycomb films pore-filled with metal salt using NaBH4. Notably, the metal nanoparticles can be selectively functionalized in the pores or on the surface of the honeycomb films by controlling the concentration of the NaBH4. Metal-nanoparticle-functionalized honeycomb films can prospectively be used in catalysis, flexible electrodes, surface-enhanced Raman spectroscopy (SERS), and wettability patterned surfaces.

In situ anchoring of metal nanoparticles in the N-doped carbon framework derived from conjugated microporous polymers towards an efficient oxygen reduction reaction

2018 ◽  
Vol 8 (14) ◽  
pp. 3572-3579 ◽  
Author(s):  
Qiang Li ◽  
Qi Shao ◽  
Qiong Wu ◽  
Qian Duan ◽  
Yanhui Li ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Metal Nanoparticles ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Microporous Polymers ◽  
Carbon Framework ◽  
Orr Activity ◽  
Conjugated Microporous Polymers

A series of efficient catalysts derived from metallophthalocyanine based conjugated microporous polymers show superior ORR activity in Zn–air batteries.

Oxygen Reduction Reaction on Au Revisited at Different pH Values using in situ Surface‐Enhanced Raman Spectroscopy

ChemSusChem ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2702-2708 ◽  
Author(s):  
Hai‐Yang Yu ◽  
Xiao‐Feng Li ◽  
Tian‐Heng Zhang ◽  
Jiao Liu ◽  
Jing‐Hua Tian ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Surface Enhanced Raman Spectroscopy ◽  
Reduction Reaction ◽  
Ph Values ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

In situ growth of metal nanoparticles on boron nitride nanosheets as highly efficient catalysts

2016 ◽  
Vol 4 (48) ◽  
pp. 19107-19115 ◽  
Author(s):  
Li Fu ◽  
Guoxin Chen ◽  
Nan Jiang ◽  
Jinhong Yu ◽  
Cheng-Te Lin ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Metal Nanoparticles ◽  
Room Temperature ◽  
Reducing Agent ◽  
Metal Nanoparticle ◽  
In Situ Growth ◽  
Boron Nitride Nanosheets ◽  
Highly Efficient ◽  
Boron Nitride Nanosheet

We report a facile and general approach for the synthesis of boron nitride nanosheet (BNNS)–metal nanoparticle (NP) composites at room temperature without adding any reducing agent.

Green Synthesis of Silk Sericin-Based Silver Nanoparticles

2011 ◽  
Vol 415-417 ◽  
pp. 487-490 ◽  
Author(s):  
Jia Li Ding ◽  
Wen Wu
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Room Temperature ◽  
Reduction Reaction ◽  
In Situ Reduction ◽  
Silk Sericin ◽  
Vis Spectroscopy ◽  
Highly Dispersed ◽  
Average Size

Green synthesis of silver nanoparticles (AgNPs) using the silk sericin (SS) solution by in situ reduction at room temperature is reported. The effect of pH on the reduction reaction is studied by UV-Vis spectroscopy. The structure of the sericin-based silver nanoparticles is characterized by TEM. According to the TEM images, the average size of the silver nanoparticles is about 16 nm. The silver nanoparticles are highly dispersed and stable in silk sericin solution for monthes.

scholarly journals A New in-situ Exsolution Supporting Framework for Metal Nanoparticle Growth

2021 ◽  
Author(s):  
Mengchu Wang ◽  
Bike Zhang ◽  
Jiaqi Ding ◽  
Fanxing Zhang ◽  
Rui Tu ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
High Stability ◽  
Room Temperature ◽  
Design Principle ◽  
Metal Nanoparticle ◽  
Uniform Size ◽  
Faradaic Efficiency ◽  
Nanoparticle Growth ◽  
Catalytic Materials

Abstract Catalysts made of in-situ exsolved metal nanoparticles often demonstrate promising activity and high stability in many applications. However, the design of these catalysts is greatly constrained by the classic exsolution mechanism, which occurs almost exclusively through substitutional metal-doping in perovskites. Here we show that metal nanoparticles can also be in-situ exsolved from interstitially doped metal cations in a NiOOH supporting framework with the guidance of theoretical calculation. The exsolution can be conducted swiftly at room temperature. A novel copper nanocatalyst prepared with this approach have a quasi-uniform size of 4 nm delivering an exceptional CO faradaic efficiency of 95.6% with a notable durability for the electrochemical reduction of CO2. This design principle is further proven to be generally applicable to other metals and foregrounded for guiding the development of advanced catalytic materials.

Synthesis and Characterization of Poly(2-acrylamido-2-methyl propyl sulfonic acid-co-2-hydroxyethyl methclate)/ Silver Nanoparticle Composite Hydrogel as Catalysts for the Reduction of 4-Nitrophenol

2014 ◽  
Vol 809-810 ◽  
pp. 59-66
Author(s):  
Yun Long Li ◽  
Bin Huang Liu ◽  
Song Bai Lin
Keyword(s):  
Sulfonic Acid ◽  
Reduction Method ◽  
Catalytic Properties ◽  
Reduction Reaction ◽  
Composite Hydrogel ◽  
Synthesis And Characterization ◽  
In Situ Reduction ◽  
End Group

A novel kind of AgNPs catalyst was synthesized by in-situ reduction method using poly(2-acrylamido-2-methyl propyl sulfonic acid-co-2-hydroxyethyl methclate) [short as P(AMPS-co-HEMA)] hydrogel as matrices and AgNO3as a metal precursor. The structure of the composite hydrogel was characterized by Scan Electrical Microscope (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The results showed that AgNPs were binded with end group and most of the particles were isolated and uniformly distributed on the P(AMPS-co-HEMA). The catalytic properties in the reduction reaction of 4-nitrophenol(shorted as 4-NP) to 4-aminophenol(shorted as 4-AP) were studied in detail, and the result showed that conversion rate and conversion efficiency attained 97.56% and 0.9671 mmol/g·min when the amount of AgNPs was 9mg, [NaBH4] was 2.0×10−1mol/L, [4-NP] was 2.0×10−2mol/L and the total volume of solution was 50 mL, respectively.

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