scholarly journals Catalytic Hydrolysis of Tricresyl Phosphate by Ruthenium (III) Hydroxide and Iron (III) Hydroxide towards Sensing Application

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2317
Author(s):  
Lang Zhou ◽  
Bryan Chin ◽  
Alex L. Simonian
Keyword(s):  
Low Cost ◽  
Neutral Condition ◽  
Flight Safety ◽  
Catalytic Hydrolysis ◽  
Tricresyl Phosphate ◽  
Air Exposure ◽  
Metal Hydroxides ◽  
Hydrolysis Products ◽  
Sensing Application ◽  
Hydrolysis Of

Tricresyl phosphate (TCP) is an organophosphorous neurotoxin that has been detected in water, soil and air. Exposure to TCP in cockpit and cabin air poses a severe threat to flight safety and the health of the aircraft cabin occupants. Conventional methods for the detection of TCP in various samples are gas or liquid chromatography coupled to mass spectrometry, which are complex and expensive. To develop a simple low-cost methodology for the real-time monitoring of TCP in the environment, an effective catalyst is demanded for the hydrolysis of TCP under neutral condition. In this study, Ruthenium (III) hydroxide and Iron (III) hydroxide are found to facilitate the production of the alcoholysis and hydrolysis products of TCP, suggesting their role as a catalyst. With this finding, these metal hydroxides provide new potential to realize not only simple colorimetric or electrochemical detection of TCP, but also a simple detoxication strategy for TCP in environment. In addition, the catalytic capability of Ru (III) or Fe (III) hydroxide for TCP gives a hint that they can potentially serve as catalysts for the hydrolysis of alcolyolysis of many other organophosphate compounds.

Synthesis of ZnO Nanoparticle and its Application in Catalytic Hydrolysis of p-Acetoxynitrobenzene

2017 ◽  
Vol 16 (04) ◽  
pp. 1750005 ◽  
Author(s):  
Avnish Kumar Arora ◽  
Pankaj Kumar ◽  
Sanjeev Kumar
Keyword(s):  
Aqueous Phase ◽  
Magnetic Measurements ◽  
Low Cost ◽  
Bet Surface Area ◽  
Precipitation Method ◽  
Effect Of Temperature ◽  
Zno Nanoparticle ◽  
Catalytic Hydrolysis ◽  
Zno Nps ◽  
Hydrolysis Of

Synthesis of ZnO nanoparticle and the hydrolysis of p-Acetoxynitrobenzene to p-Nitrophenol (p-NP) under aqueous phase conditions in the presence of ZnO nanoparticle has been carried out. Zinc oxide (ZnO) nanoparticles (NPs) are prepared by using simple precipitation method. Ammonia is used as a precipitating agent and ZnCl[Formula: see text]H2O as a starting material. The obtained ZnO NPs are characterized by using different techniques namely XRD, TGA/DTA, TEM, FT-IR, magnetic measurements and BET surface area analysis. ZnO NPs are evaluated for their catalytic properties in hydrolysis of p-Acetoxynitrobenzene to p-Nitrophenol (p-NP) under aqueous phase conditions. The effect of temperature and concentration has also been studied for the catalytic hydrolysis. This is to emphasize that the method used to synthesize these NPs is much simple and fiscal. The obtained ZnO NPs work as a good catalyst for the above conversion and are of low cost and easy to synthesize.

scholarly journals Catalytic hydrolysis of CFC-12 over MoO3/ZrO2 -TiO2 solid acid

2020 ◽  
Author(s):  
Zhiqian Li ◽  
Tong Zhou ◽  
Guoqing Ren ◽  
Xiaofang Tan ◽  
Lijuan Jia ◽  
...  
Keyword(s):  
Water Vapor ◽  
Solid Acid ◽  
Hydrolysis Rate ◽  
Vapor Concentration ◽  
Water Vapor Concentration ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Products ◽  
Hydrolysis Temperature ◽  
Continuous Reaction ◽  
Hydrolysis Of

Abstract The catalytic hydrolysis of Difluorodichloromethane(CFC-12) by solid acid of MoO3/ZrO2-TiO2 calcined at different temperature had been studied. The effects of catalytic hydrolysis temperature and water vapor concentration on catalytic hydrolysis of CFC-12were also studied. The results showed that catalytic hydrolysis rate of CFC-12 reached to 98.65% at 400 ℃ when the MoO3/ZrO2-TiO2 catalyst was calcined at 500 ℃ with a concentration of water vapor of 83.18%, and the main hydrolysis products were CO, CO2, HF and HCl. After 30 hours’ continuous reaction, the hydrolysis rate of CFC-12 was 65.34%. The XRD result reveals that the main phase of solid MoO3/ZrO2-TiO2 catalyst is the tetragonal Zr (MoO4)2 with doped TiO2 of anatase.

Catalytic hydrolysis of phosphate esters in microemulsions. 3. Analysis of the hydrolysis products of p-nitrophenyl diphenyl phosphate via 31P NMR

1988 ◽  
Vol 53 (9) ◽  
pp. 2009-2011 ◽  
Author(s):  
Beth A. Burnside ◽  
Linda L. Szafraniec ◽  
Barry L. Knier ◽  
H. Dupont Durst ◽  
Raymond A. Mackay ◽  
...  
Keyword(s):  
31P Nmr ◽  
Phosphate Esters ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Products ◽  
Diphenyl Phosphate ◽  
Hydrolysis Of

scholarly journals Catalytic hydrolysis of Dichlorodifluoromethane over MoO3/ZrO2 -TiO2 solid acid

2020 ◽  
Author(s):  
Zhiqian Li ◽  
Tong Zhou ◽  
Guoqing Ren ◽  
Xiaofang Tan ◽  
Lijuan Jia ◽  
...  
Keyword(s):  
Water Vapor ◽  
Solid Acid ◽  
Hydrolysis Rate ◽  
Vapor Concentration ◽  
Water Vapor Concentration ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Products ◽  
Hydrolysis Temperature ◽  
Continuous Reaction ◽  
Hydrolysis Of

Abstract The catalytic hydrolysis of Difluorodichloromethane(CFC-12) by solid acid of MoO3/ZrO2-TiO2 calcined at different temperature had been studied. The effects of catalytic hydrolysis temperature and water vapor concentration on catalytic hydrolysis of CFC-12were also studied. The results showed that catalytic hydrolysis rate of CFC-12 reached to 98.65 % at 400。C when the MoO3/ZrO2-TiO2 catalyst was calcined at 500℃ with a concentration of water vapor of 83.18% ,and the main hydrolysis products were CO, CO2, HF and HCl. After 30 hours’ continuous reaction, the hydrolysis rate of CFC-12 was 65.34%. The XRD result reveals that the main phase of solid MoO3/ZrO2-TiO2 catalyst is the tetragonal Zr(MoO4)2with dopedTiO2 of anatase.

scholarly journals Catalytic hydrolysis of Dichlorodifluoromethane over MoO3/ZrO2 -TiO2 solid acid

2020 ◽  
Author(s):  
Zhiqian Li ◽  
Tong Zhou ◽  
Guoqing Ren ◽  
Xiaofang Tan ◽  
Lijuan Jia ◽  
...  
Keyword(s):  
Water Vapor ◽  
Solid Acid ◽  
Hydrolysis Rate ◽  
Vapor Concentration ◽  
Water Vapor Concentration ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Products ◽  
Hydrolysis Temperature ◽  
Continuous Reaction ◽  
Hydrolysis Of

Abstract The catalytic hydrolysis of Difluoro dichloromethane (CFC-12) by solid acid of MoO3/ZrO2-TiO2 calcined at different temperature had been studied. The effects of catalytic hydrolysis temperature and water vapor concentration on catalytic hydrolysis of CFC-12 were also studied. The results showed that catalytic hydrolysis rate of CFC-12 reached to 98.65 % at 400℃when the MoO3/ZrO2-TiO2 catalyst was calcined at 500℃ with a concentration of water vapor of 83.18%, and the main hydrolysis products were CO, CO2, HF and HCl. After 30 hours’ continuous reaction, the hydrolysis rate of CFC-12 was 65.34%. The XRD result reveals that the main phase of solid MoO3/ZrO2-TiO2 catalyst is the tetragonal Zr (MoO4)2with doped TiO2 of anatase.

scholarly journals Effect on the enzymatic hydrolysis of lipids from dairy wastewater by replacing Gum Arabic emulsifier for sodium chloride

2005 ◽  
Vol 48 (spe) ◽  
pp. 135-142 ◽  
Author(s):  
Adriano Aguiar Mendes ◽  
Heizir Ferreira de Castro
Keyword(s):  
Sodium Chloride ◽  
Enzymatic Hydrolysis ◽  
Suspended Solids ◽  
Lower Cost ◽  
Low Cost ◽  
Gum Arabic ◽  
Dairy Wastewater ◽  
Promising Technique ◽  
Animal Source ◽  
Hydrolysis Of

The objective of this work was to evaluate the replacement of Gum Arabic for sodium chloride to reduce fat and organic contents in dairy wastewater using two low cost commercially available lipase preparations from animal source (Kin Master - LKM and Nuclear- LNU). The best performance was achieved when lipase Nuclear (LNU) was used as catalyst. In addition, this lipase preparation has also lower cost, which makes its use a quite promising technique for reduction of suspended solids as proteins and lipids contents found in wastewater generated by dairy industries.

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