ZnO Nanoparticle Induced Photo-Kolbe Reaction, Fragment Stabilization and Effect on Photopolymerization Monitored by Raman-UV-Vis Measurements

2012 ◽  
Vol 213 (18) ◽  
pp. 1953-1962 ◽  
Author(s):  
Michael Schmitt
Keyword(s):  
Zno Nanoparticle ◽  
Kolbe Reaction

scholarly journals Photocatalytic Pretreatment of Commercial Lignin Using TiO2-ZnO Nanocomposite-Derived Advanced Oxidation Processes for Methane Production Synergy in Lab Scale Continuous Reactors

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 54
Author(s):  
Yu-Ming Chu ◽  
Hafiz Muhammad Asif Javed ◽  
Muhammad Awais ◽  
Muhammad Ijaz Khan ◽  
Sana Shafqat ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Advanced Oxidation Processes ◽  
Synergistic Effects ◽  
Oxidation Products ◽  
Methane Yield ◽  
Zno Nanoparticle ◽  
Coumaric Acid ◽  
Stirred Tank Reactors ◽  
Lignin Oxidation ◽  
Constant Operation

The photocatalytic pretreatment of lignocellulosic biomass to oxidize lignin and increase biomass stability has gained attention during the last few years. Conventional pretreatment methods are limited by the fact that they are expensive, non-renewable and contaminate the anaerobic digestate later on. The present study was focused to develop a metal-derived photocatalyst that can work with visible electromagnetic spectra light and oxidize commercial lignin liquor. During this project the advanced photocatalytic oxidation of lignin was achieved by using a quartz cube tungsten T3 Halogen 100 W lamp with a laboratory manufactured TiO2-ZnO nanoparticle (nanocomposite) in a self-designed apparatus. The products of lignin oxidation were confirmed to be vanillic acid (9.71 ± 0.23 mg/L), ferrulic acid (7.34 ± 0.16 mg/L), benzoic acid (6.12 ± 0.17 mg/L) and p-coumaric acid (3.80 ± 0.13 mg/L). These all products corresponded to 85% of the lignin oxidation products that were detectable, which is significantly more than any previously reported lignin pretreatment with even more intensity. Furthermore, all the pretreatment samples were supplemented in the form of feedstock diluent in uniformly operating continuously stirred tank reactors (CSTRs). The results of pretreatment revealed 85% lignin oxidation and later on these products did not hinder the CSTR performance at any stage. Moreover, the synergistic effects of pretreated lignin diluent were seen that resulted in 39% significant increase in the methane yield of the CSTR with constant operation. Finally, the visible light and nanoparticles alone could not pretreat lignin and when used as diluent, halted and reduced the methane yield by 37% during 4th HRT.

Flexible ultraviolet detector with robust ZnO nanoparticle nanoassemblies on catechol‐functionalized polysiloxane nanofilms

2021 ◽  
pp. 50947
Author(s):  
Yida Liu ◽  
Huie Zhu ◽  
Akira Watanabe ◽  
Shunsuke Yamamoto ◽  
Tokuji Miyashita ◽  
...  
Keyword(s):  
Zno Nanoparticle ◽  
Ultraviolet Detector

Well-connected ZnO nanoparticle network fabricated by in-situ annealing of ZIF-8 for enhanced sensitivity in gas sensing application

2021 ◽  
pp. 130180
Author(s):  
Yong Xia ◽  
Aifei Pan ◽  
David W. Gardner ◽  
Sikai Zhao ◽  
Adrian K. Davey ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Zno Nanoparticle ◽  
Enhanced Sensitivity ◽  
Sensing Application

Self-Assembled ZnO Nanoparticle Capsules for Carrying and Delivering Isotretinoin to Cancer Cells

2017 ◽  
Vol 9 (22) ◽  
pp. 18474-18481 ◽  
Author(s):  
Wei Zhao ◽  
Ji-Shi Wei ◽  
Peng Zhang ◽  
Jie Chen ◽  
Ji-Lie Kong ◽  
...  
Keyword(s):  
Cancer Cells ◽  
Zno Nanoparticle ◽  
Self Assembled

scholarly journals p-Channel and n-Channel Thin-Film-Transistor Operation on Sprayed ZnO Nanoparticle Layers

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Daiki Itohara ◽  
Kazato Shinohara ◽  
Toshiyuki Yoshida ◽  
Yasuhisa Fujita
Keyword(s):  
Thin Film ◽  
Arc Discharge ◽  
Thin Film Transistor ◽  
Chamber Pressure ◽  
Zno Nanoparticle ◽  
Zno Nps ◽  
Lower Chamber ◽  
Hall Effect Measurements ◽  
Particle Process ◽  
P Type

Both n-channel and p-channel thin-film transistors have been realized on ZnO nanoparticle (NP) layers sprayed onto quartz substrates. In this study, nitrogen-doped ZnO-NPs were synthesized using an arc-discharge-mediated gas-evaporation method that was recently developed. Sprayed NP layers were characterized by scanning electron microscopy and Hall effect measurements. It was confirmed that p-type behaving NP layers can be obtained using ZnO-NPs synthesized with lower chamber pressure, whereas n-type conductivity can be obtained with higher chamber pressure. pn-junction diodes were also tested, resulting in clear rectifying characteristics. The possibility of particle-process-based ZnO-NP electronics was confirmed.

Controlled potential studies on the Kolbe reaction and the role of coadsorbed surface oxides. II. The reaction at gold

1967 ◽  
Vol 71 (11) ◽  
pp. 3655-3664 ◽  
Author(s):  
Ashok K. Vijh ◽  
Brian E. Conway
Keyword(s):  
Surface Oxides ◽  
Controlled Potential ◽  
Kolbe Reaction

Multiscale Modeling of ZnO Nanoparticle Synthesis: Chemical Kinetics and Turing Instability

2021 ◽  
pp. 102748
Author(s):  
Raúl Mendoza Báez ◽  
Marco A. Morales ◽  
Adan Luna Flores ◽  
Ricardo Agustín Serrano
Keyword(s):  
Chemical Kinetics ◽  
Multiscale Modeling ◽  
Nanoparticle Synthesis ◽  
Turing Instability ◽  
Zno Nanoparticle

scholarly journals Process Development and Material Property of ZnO Nanoparticle Suspension by High Frequency Induction

2004 ◽  
Vol 47 (3) ◽  
pp. 494-501 ◽  
Author(s):  
Ho CHANG ◽  
Tsing Tshih TSUNG ◽  
Liang Chia CHEN ◽  
Yu Cheng CHEN ◽  
Hong Ming LIN ◽  
...  
Keyword(s):  
Material Property ◽  
High Frequency ◽  
Process Development ◽  
Zno Nanoparticle ◽  
Nanoparticle Suspension ◽  
High Frequency Induction

Photocatalytic activity of ZnO nanoparticle encapsulated poly(acrylonitrile) nanofibers

2018 ◽  
Vol 204 ◽  
pp. 195-206 ◽  
Author(s):  
Nadeeka D. Tissera ◽  
Ruchira N. Wijesena ◽  
Chanaka S. Sandaruwan ◽  
Rohini M. de Silva ◽  
Ajith de Alwis ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Zno Nanoparticle ◽  
Poly Acrylonitrile

ZINC OXIDE NANOPARTICLES FOR ULTRAVIOLET PHOTODETECTION

2011 ◽  
Vol 20 (01) ◽  
pp. 183-194 ◽  
Author(s):  
SHAYLA SAWYER ◽  
LIQIAO QIN ◽  
CHRISTOPHER SHING
Keyword(s):  
Zinc Oxide ◽  
Gallium Nitride ◽  
Zno Nanoparticles ◽  
Green Emission ◽  
Synthesis Process ◽  
Voltage Response ◽  
Zno Nanoparticle ◽  
Linear Current ◽  
Current Voltage ◽  
Lift Off

Zinc Oxide ( ZnO ) nanoparticles were created by a top-down wet-chemistry synthesis process ( ZnO - A ) and then coated with polyvinyl-alcohol (PVA) ( ZnO - U ). In ZnO - U , strong UV emission was apparent while the parasitic green emission, which normally appears in ZnO suspensions, was suppressed. A standard lift-off process via e-beam lithography was used to fabricate a detector by evaporating Aluminum ( Al ) as ohmic electrodes on the ZnO nanoparticle film. Photoconductivity experiments showed that linear current-voltage response were achieved and the ZnO - U nanoparticles based detector had a ratio of UV photo-generated current more than 5 times better than that of the ZnO - A based detector. In addition, non-linear current-voltage responses were observed when interdigitated finger Gold ( Au ) contacts were deposited on ZnO - U . The UV generated current to dark current ratios were between 4 and 7 orders of magnitude, showing better performance than the photodetector with Al contacts. ZnO - U were also deposited on Gallium Nitride ( GaN ) and Aluminum Gallium Nitride ( AlGaN ) substrates to create spectrally selective photodetectors. The responsivity of detector based on AlGaN is twice that of commercial UV enhanced Silicon photodiodes. These results confirmed that ZnO nanoparticles coating with PVA is a good material for small-signal, visible blind, and wavelength selective UV detection.

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