Synthesis of silver nanoparticles within cross-linked lysozyme crystals as recyclable catalysts for 4-nitrophenol reduction

2013 ◽  
Vol 3 (8) ◽  
pp. 1910 ◽  
Author(s):  
Miao Liang ◽  
Libing Wang ◽  
Rongxin Su ◽  
Wei Qi ◽  
Mengfan Wang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Nitrophenol Reduction ◽  
Recyclable Catalysts ◽  
Lysozyme Crystals

scholarly journals Silver-Nanoparticles Embedded Pyridine-Cholesterol Xerogels as Highly Efficient Catalysts for 4-nitrophenol Reduction

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1486
Author(s):  
Ganesh Shimoga ◽  
Eun-Jae Shin ◽  
Sang-Youn Kim
Keyword(s):  
Silver Nanoparticles ◽  
Trisodium Citrate ◽  
Environmentally Benign ◽  
X Ray Diffraction ◽  
Physico Chemical ◽  
Efficient Reduction ◽  
Nitrophenol Reduction ◽  
Uv Visible ◽  
Average Size

Two xerogels made of 4-pyridyl cholesterol (PC) and silver-nanocomposites (SNCs) thereof have been studied for their efficient reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in the presence of aqueous sodium borohydride. Since in-situ silver doping will be effective in ethanol and acetone solvents with a PC gelator, two silver-loaded PC xerogels were prepared and successive SNCs were achieved by using an environmentally benign trisodium citrate dehydrate reducing agent. The formed PC xerogels and their SNCs were comprehensively investigated using different physico-chemical techniques, such as field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), powdered X-ray diffraction (XRD) and UV-Visible spectroscopy (UV-Vis). The FE-SEM results confirm that the shape of xerogel-covered silver nanoparticles (SNPs) are roughly spherical, with an average size in the range of 30–80 nm. Thermal degradation studies were analyzed via the sensitive graphical Broido’s method using a TGA technique. Both SNC-PC (SNC-PC-X1 and SNC-PC-X2) xerogels showed remarkable catalytic performances, with recyclable conversion efficiency of around 82% after the fourth consecutive run. The apparent rate constant (kapp) of SNC-PC-X1 and SNC-PC-X2 were found to be 6.120 × 10-3 sec-1 and 3.758 × 10-3 sec-1, respectively, at an ambient temperature.

scholarly journals Pd–ZnO nanowire arrays as recyclable catalysts for 4-nitrophenol reduction and Suzuki coupling reactions

RSC Advances ◽  
2017 ◽  
Vol 7 (13) ◽  
pp. 7964-7972 ◽  
Author(s):  
Qiyan Hu ◽  
Xiaowang Liu ◽  
Lin Tang ◽  
Dewen Min ◽  
Tianchao Shi ◽  
...  
Keyword(s):  
Suzuki Coupling ◽  
Nanowire Arrays ◽  
Coupling Reactions ◽  
Zno Nanowire ◽  
Zno Nanowire Arrays ◽  
Nitrophenol Reduction ◽  
Recyclable Catalysts

Hybrid Pd–ZnO nanowire arrays for catalysis: Pd–ZnO@Zn nanowire arrays have been found to be applicable as recyclable catalysts for 4-nitrophenol reduction and Suzuki coupling reactions.

scholarly journals Facile Synthesis of Silver Nanoparticles Stabilized by Cationic Polynorbornenes and Their Catalytic Activity in 4-Nitrophenol Reduction

Langmuir ◽  
2013 ◽  
Vol 29 (13) ◽  
pp. 4225-4234 ◽  
Author(s):  
Bharat Baruah ◽  
Gregory J. Gabriel ◽  
Michelle J. Akbashev ◽  
Matthew E. Booher
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Facile Synthesis ◽  
Nitrophenol Reduction

Glycerol as green hydrogen source for catalytic reduction over anisotropic silver nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (105) ◽  
pp. 103471-103477 ◽  
Author(s):  
A. D. Verma ◽  
R. K. Mandal ◽  
I. Sinha
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Reduction ◽  
Nitrophenol Reduction ◽  
Catalytic Kinetics ◽  
Kinetics Of ◽  
Shape And Size

Effect of shape and size of AgNPs on the catalytic kinetics of p-nitrophenol reduction using glycerol as a hydrogen source.

scholarly journals Fast 4-nitrophenol Reduction Using Gelatin Hydrogel Containing Silver Nanoparticles

2020 ◽  
Author(s):  
Mazhar Ul-Islam ◽  
◽  
Jawad Ali ◽  
Waliullah Khan ◽  
Adnan Haider ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Gelatin Hydrogel ◽  
Nitrophenol Reduction

High-efficiency and Recyclable Catalysts of Co3O4 Hierarchical Microstructures for p-Nitrophenol Reduction

2018 ◽  
Vol 47 (9) ◽  
pp. 1207-1209 ◽  
Author(s):  
Kun Liu ◽  
Min Ling ◽  
Qian-Qian Zhang ◽  
Kong-Lin Wu ◽  
Yin Ye ◽  
...  
Keyword(s):  
High Efficiency ◽  
Nitrophenol Reduction ◽  
Recyclable Catalysts

scholarly journals Room-Temperature Polyol Synthesis of Ag/SiO2 Nanocomposite as a Catalyst for 4-Nitrophenol Reduction

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Canh Minh Thang Nguyen ◽  
Vinh Tien Nguyen
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Ambient Temperature ◽  
Room Temperature ◽  
Apparent Rate Constant ◽  
Polyol Synthesis ◽  
Ultrasonic Probe ◽  
Nitrophenol Reduction ◽  
The Stability ◽  
Xrd Patterns

We prepared silver nanoparticles (AgNP) embedded in SiO2 using a green polyol approach by conducting the synthesis at ambient temperature and pH. Glycerol solutions of SiO2 and silver nitrate were stirred overnight at room temperature. UV-vis spectra and TEM images of the reaction dispersion and XRD patterns of the centrifuged solid confirmed formation of AgNP (6 ± 2 nm) were embedded in SiO2. AAS showed that, about 50% of initial silver was deposited on SiO2. The presence of SiO2 enhanced the formation of AgNP and the stability of Ag/SiO2 in glycerol. The reason for these findings was probably the ultrasonic-probe dispersion of SiO2 in glycerol, which caused chemical interactions between glycerol and SiO2. Compared to bare AgNP, the AgNP/SiO2 demonstrated higher catalytic activity toward 4-nitrophenol reduction by NaBH4. The highest apparent rate constant was approximately 1.1 ∗ 10−4 s−1, comparable with Ag/SiO2 catalysts prepared using other methods. This study proposes a greener polyol method to synthesize SiO2-supported AgNP catalyst that does not require heating or regulating pH of the reaction mixture. This nanocomposite can be used in catalytic, antimicrobial, sensing, and other applications that are using AgNP/SiO2 synthesized by conventional methods.

Preparation of hyperstar polymers with encapsulated Au25(SR)18clusters as recyclable catalysts for nitrophenol reduction

Nanoscale ◽  
2017 ◽  
Vol 9 (10) ◽  
pp. 3629-3636 ◽  
Author(s):  
Daqiao Hu ◽  
Shan Jin ◽  
Yi Shi ◽  
Xiaofeng Wang ◽  
Robert W. Graff ◽  
...  
Keyword(s):  
Nitrophenol Reduction ◽  
Recyclable Catalysts
Sign in / Sign up

Export Citation Format

Share Document