Nanostructured ZnO/sepiolite monolithic sorbents for H2S removal

2015 ◽  
Vol 3 (3) ◽  
pp. 1306-1316 ◽  
Author(s):  
Raquel Portela ◽  
Fernando Rubio-Marcos ◽  
Pilar Leret ◽  
José F. Fernández ◽  
Miguel A. Bañares ◽  
...  
Keyword(s):  
Zno Nanoparticle ◽  
Nanoparticle Dispersion ◽  
H2s Removal ◽  
Monolithic Sorbents

ZnO chemisorbs H2S as ZnS in inert atmospheres and catalyzes H2S to SO2 oxidation in the presence of O2. ZnO nanoparticle dispersion is preserved after extrusion of ZnO/sepiolite composites and favors H2S removal.

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.

scholarly journals Reaction Mechanism and Mechanical Property Improvement of Poly(Lactic Acid) Reactive Blending with Epoxy Resin

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2429
Author(s):  
Krittameth Kiatiporntipthak ◽  
Nanthicha Thajai ◽  
Thidarat Kanthiya ◽  
Pornchai Rachtanapun ◽  
Noppol Leksawasdi ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Epoxy Resin ◽  
Softening Temperature ◽  
Poly Lactic Acid ◽  
Mechanical And Thermal Properties ◽  
Nanoparticle Dispersion ◽  
Reactive Blending ◽  
Partial Miscibility ◽  
Epoxy Blends ◽  
Epoxy Content

Polylactic acid (PLA) was melt-blended with epoxy resin to study the effects of the reaction on the mechanical and thermal properties of the PLA. The addition of 0.5% (wt/wt) epoxy to PLA increased the maximum tensile strength of PLA (57.5 MPa) to 67 MPa, whereas the 20% epoxy improved the elongation at break to 12%, due to crosslinking caused by the epoxy reaction. The morphology of the PLA/epoxy blends showed epoxy nanoparticle dispersion in the PLA matrix that presented a smooth fracture surface with a high epoxy content. The glass transition temperature of PLA decreased with an increasing epoxy content owing to the partial miscibility between PLA and the epoxy resin. The Vicat softening temperature of the PLA was 59 °C and increased to 64.6 °C for 0.5% epoxy. NMR confirmed the reaction between the -COOH groups of PLA and the epoxy groups of the epoxy resin. This reaction, and partial miscibility of the PLA/epoxy blend, improved the interfacial crosslinking, morphology, thermal properties, and mechanical properties of the blends.

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

H2S removal performance of Ca3Al2O6-stabilized carbide slag from CO2 capture cycles using calcium looping

2021 ◽  
Vol 218 ◽  
pp. 106845
Author(s):  
Yuping Hu ◽  
Shuimu Wu ◽  
Yingjie Li ◽  
Jianli Zhao ◽  
Shijian Lu
Keyword(s):  
Co2 Capture ◽  
H2s Removal ◽  
Calcium Looping ◽  
Carbide Slag

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

Effects of Gold Nanoparticle Dispersion in a Chiral Liquid Crystal Matrix

2013 ◽  
Vol 572 (1) ◽  
pp. 59-65 ◽  
Author(s):  
M. Infusino ◽  
A. De Luca ◽  
F. Ciuchi ◽  
A. Ionescu ◽  
N. Scaramuzza ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Gold Nanoparticle ◽  
Nanoparticle Dispersion ◽  
Crystal Matrix ◽  
Chiral Liquid Crystal ◽  
Liquid Crystal Matrix

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.

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