scholarly journals Selective photocatalytic oxidation of gaseous ammonia at ppb level over Pt and F modified TiO2

2021 ◽  
pp. 120688
Author(s):  
Yajie Shu ◽  
Jian Ji ◽  
Ming Zhou ◽  
Shimin Liang ◽  
Quan Xie ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Gaseous Ammonia

Tetraphenyl–porphyrin decorated anatase TiO2 catalysts for the visible–light photocatalytic oxidation of gaseous ammonia at room temperature

2020 ◽  
Vol 506 ◽  
pp. 144421
Author(s):  
Fengyu Gao ◽  
Shuang Song ◽  
Xiaolong Tang ◽  
Honghong Yi ◽  
Shunzheng Zhao ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Oxidation ◽  
Room Temperature ◽  
Anatase Tio2 ◽  
Gaseous Ammonia ◽  
Tetraphenyl Porphyrin ◽  
Visible Light Photocatalytic

Facet-dependent performance of anatase TiO2 for photocatalytic oxidation of gaseous ammonia

2018 ◽  
Vol 223 ◽  
pp. 209-215 ◽  
Author(s):  
Min Chen ◽  
Jinzhu Ma ◽  
Bo Zhang ◽  
Fei Wang ◽  
Yaobin Li ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Anatase Tio2 ◽  
Gaseous Ammonia

scholarly journals Photocatalytic oxidation of gaseous ammonia over fluorinated TiO2 with exposed (001) facets

2014 ◽  
Vol 152-153 ◽  
pp. 82-87 ◽  
Author(s):  
Hongmin Wu ◽  
Jinzhu Ma ◽  
Yaobin Li ◽  
Changbin Zhang ◽  
Hong He
Keyword(s):  
Photocatalytic Oxidation ◽  
Gaseous Ammonia ◽  
Fluorinated Tio2

Selective photocatalytic oxidation of gaseous ammonia to dinitrogen in a continuous flow reactor

2012 ◽  
Vol 2 (9) ◽  
pp. 1802 ◽  
Author(s):  
Steven Heylen ◽  
Sam Smet ◽  
Katrien G. M. Laurier ◽  
Johan Hofkens ◽  
Maarten B. J. Roeffaers ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Photocatalytic Oxidation ◽  
Flow Reactor ◽  
Gaseous Ammonia ◽  
Continuous Flow Reactor

EFFICIENT DEGRADATION OF CLOFIBRIC ACID BY HETEROGENEOUS PHOTOCATALYTIC OXIDATION PROCESS

2019 ◽  
Vol 18 (8) ◽  
pp. 1683-1692 ◽  
Author(s):  
Lidia Favier ◽  
Lacramioara Rusu ◽  
Andrei Ionut Simion ◽  
Raluca Maria Hlihor ◽  
Mariana Liliana Pacala ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Oxidation Process ◽  
Clofibric Acid

Kinetics of the reaction between solid terephthalic acid and gaseous ammonia

1973 ◽  
Vol 38 (12) ◽  
pp. 3561-3570 ◽  
Author(s):  
J. Smolík ◽  
J. Vítovec
Keyword(s):  
Terephthalic Acid ◽  
Gaseous Ammonia ◽  
Kinetics Of

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 Tailoring Properties of Resol Resin-Derived Spherical Carbons for Adsorption of Phenol from Aqueous Solution

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1736
Author(s):  
Karol Sidor ◽  
Tomasz Berniak ◽  
Piotr Łątka ◽  
Anna Rokicińska ◽  
Marek Michalik ◽  
...  
Keyword(s):  
Surface Composition ◽  
Micropore Volume ◽  
Gaseous Ammonia ◽  
Poly Vinyl Alcohol ◽  
Clear Correlation ◽  
Hno3 Solution ◽  
Synthesis Conditions ◽  
Adsorption Of Nitrogen ◽  
Oxygen Groups ◽  
Size Of Particles

The polycondensation of resorcinol and formaldehyde in a water–ethanol mixture using the adapted Stöber method was used to obtain resol resins. An optimization of synthesis conditions and the use of an appropriate stabilizer (e.g., poly(vinyl alcohol)) resulted in spherical grains. The resins were carbonized in the temperature range of 600–1050 °C and then chemically activated in an aqueous HNO3 solution, gaseous ammonia, or by an oxidation–reduction cycle (soaking in a HNO3 solution followed by treatment with NH3). The obtained carbons were characterized by XRD, the low-temperature adsorption of nitrogen, SEM, TGA, and XPS in order to determine degree of graphitization, porosity, shape and size of particles, and surface composition, respectively. Finally, the materials were tested in phenol adsorption. The pseudo-second order model perfectly described the adsorption kinetics. A clear correlation between the micropore volume and the adsorption capacity was found. The content of graphite domains also had a positive effect on the adsorption properties. On the other hand, the presence of heteroatoms, especially oxygen groups, resulted in the clogging of the pores and a decrease in the amount of adsorbed phenol.

scholarly journals Research Progress on Photocatalytic/Photoelectrocatalytic Oxidation of Nitrogen Oxides

2021 ◽  
Author(s):  
Shuangjun Li ◽  
Linglong Chen ◽  
Zhong Ma ◽  
Guisheng Li ◽  
Dieqing Zhang
Keyword(s):  
Nitrogen Oxides ◽  
Photocatalytic Oxidation ◽  
Research Progress ◽  
Future Directions ◽  
Inorganic Semiconductors ◽  
Photoelectrocatalytic Oxidation ◽  
Low Concentrations ◽  
Photocatalytic System ◽  
Metal Organic ◽  
Oxidation Of No

AbstractThe emission of nitrogen oxides (NOx) increases year by year, causing serious problems to our livelihoods. The photocatalytic oxidation of NOx has attracted more attention recently because of its efficient removal of NOx, especially for low concentrations of NOx. In this review, the mechanism of the photocatalytic oxidation of NOx is described. Then, the recent progress on the development of photocatalysts is reviewed according to the categories of inorganic semiconductors, bismuth-based compounds, nitrogen carbide polymer, and metal organic frameworks (MOFs). In addition, the photoelectrocatalytic oxidation of NOx, a method involving the application of an external voltage on the photocatalytic system to further increase the removal efficiency of NOx, and its progress are summarized. Finally, we outline the remaining challenges and provide our perspectives on the future directions for the photocatalytic oxidation of NOx.

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