High-Performance Volatile Organic Compounds Microsensor Based on Few-Layer MoS2 -Coated Photonic Crystal Cavity

2018 ◽  
Vol 6 (6) ◽  
pp. 1700882 ◽  
Author(s):  
Chenyang Zhao ◽  
Xuetao Gan ◽  
Qingchen Yuan ◽  
Siqi Hu ◽  
Liang Fang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
High Performance ◽  
Photonic Crystal Cavity ◽  
Volatile Organic

Hollow spheres of CoCr2O4–Cr2O3 mixed oxides with nanoscale heterojunctions for exclusive detection of indoor xylene

2018 ◽  
Vol 6 (40) ◽  
pp. 10767-10774 ◽  
Author(s):  
Bo-Young Kim ◽  
Ji-Won Yoon ◽  
Kyeorei Lim ◽  
Sung Hyun Park ◽  
Ji-Wook Yoon ◽  
...  
Keyword(s):  
Air Quality ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
High Performance ◽  
Catalytic Effect ◽  
Mixed Oxides ◽  
Hollow Spheres ◽  
Volatile Organic ◽  
Ppm Level

Ultrahigh selectivity and response to sub-ppm-level of p-xylene was achieved using CoCr2O4–Cr2O3 spheres. The unique catalytic effect and nanoscale heterojunction of CoCr2O4 and Cr2O3 provide a strategy to design high performance volatile organic compounds sensors for monitoring air quality.

scholarly journals Synthesis of polyurethanes with low volatile organic compounds content for upholstery and automotive articles

2020 ◽  
Author(s):  
Anna Bacardit ◽  
Silvia Sorolla ◽  
Concepcio Casas ◽  
Lluis Olle ◽  
Mireia Conde
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
High Performance ◽  
Color Change ◽  
Research Work ◽  
Pilot Scale ◽  
Long Term Effects ◽  
Minimal Impact ◽  
Volatile Organic ◽  
Pilot Scale Reactor

The manufacture of upholstery and automotive articles is linked to the release of Volatile Organic Compounds (hereinafter VOCs) during their manufacture, which have short and long-term effects on the health of users and the environment. In the leather sector, around 40 kg of VOCs are generated per 1000 kg of raw skin. This research work has focused on the synthesis of new and more sustainable urethane-based polymers that, in turn, allow the quality requirements of the finish to be met, which vary depending on the leather article manufactured. The main objective of the study is to minimize the content of VOCs in the different aliphatic polyurethanes synthesized in a pilot-scale reactor, making small modifications to the synthesis formulations. The synthesis route developed is based on the preparation of polymers of ionomeric polyurethanes and their subsequent dispersion in water. In the synthesis processes developed, the content of coalescing solvents and neutralizing agents, which directly contribute to the concentration of VOCs of the urethane polymers, is eliminated and / or minimized as much as possible. The new urethane-based polymers obtained have been analyzed according to the parameters of pH, viscosity, density and percentage of solids in the resin. Likewise, organoleptic tests (color, transparency, hardness, touch and tacking) and physical tests (tensile strength, water absorption, hardness and color change at 100°C for 24 hours) have been carried out on the film corresponding to each synthesized polyurethane resin. These products will be introduced in finishing formulations designed to obtain high-performance upholstery and automotive leather with minimal impact in terms of VOC content at the pilot level. Tests of fastness and physical resistance have been carried out to evaluate the performance of these leathers.

Integrated Approach to Monitoring Volatile Organic Compounds by Photonic-Crystal Sensor Matrices

2021 ◽  
Vol 66 (2) ◽  
pp. 217-224
Author(s):  
E. S. Bol’shakov ◽  
A. V. Ivanov ◽  
A. V. Garmash ◽  
A. S. Samokhin ◽  
A. A. Kozlov ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Integrated Approach ◽  
Volatile Organic

scholarly journals Chemical sensor based on a solid-core photonic crystal fiber interferometer

2019 ◽  
Vol 13 (27) ◽  
pp. 127-143
Author(s):  
Rawaa K. Zarzoor
Keyword(s):  
Photonic Crystal ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Photonic Crystal Fiber ◽  
Chemical Sensor ◽  
Pump Light ◽  
Solid Core ◽  
Crystal Fiber ◽  
Sensing Applications ◽  
Volatile Organic

Photonic crystal fiber interferometers are used in many sensing applications. In this work, an in-reflection photonic crystal fiber (PCF) based on Mach-Zehnder (micro-holes collapsing) (MZ) interferometer, which exhibits high sensitivity to different volatile organic compounds (VOCs), without the needing of any permeable material. The interferometer is robust, compact, and consists of a stub photonic crystal fiber of large-mode area, photonic crystal fiber spliced to standard single mode fiber (SMF) (corning-28), this splicing occurs with optimized splice loss 0.19 dB In the splice regions the voids of the holey fiber are completely collapsed, which allows the excitation and recombination of core and cladding modes. The device reflection spectrum exhibits a sinusoidal interference pattern which shifts differently when the voids of the PCF are infiltrated with VOC molecules. The volume of voids responsible for the shift is less than 5microliters whereas the detectable levels are in the nanomole range. Laser diode with a wavelength 1550nm has been used as a pump light source. Two types of chemical liquids used (N-Hexane, and Propanol). The detection limits of our device associated with the maximum shifts of the wavelength is 4.4 nm for N-Hexane vapor when the length of the head sensor 20mm. In this work, the maximum sensitivity obtained of volatile organic compounds is 15420 nm/mol at the vapor of N-Hexane.

scholarly journals Identifying Sources of Volatile Organic Compounds and Aldehydes in a High Performance Building

2010 ◽  
Author(s):  
Anna C. Ortiz ◽  
Marion Russell ◽  
Wen-Yee Lee ◽  
Michael Apte ◽  
Randy Maddalena
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
High Performance ◽  
Volatile Organic ◽  
High Performance Building

scholarly journals Study on mesoporous catalysts for oxidation of volatile organic compounds

2022 ◽  
Vol 355 ◽  
pp. 01030
Author(s):  
Xianqiang Ran
Keyword(s):  
Volatile Organic Compounds ◽  
Catalytic Oxidation ◽  
Organic Compounds ◽  
High Performance ◽  
Oxidation Process ◽  
Dominant Role ◽  
Active Components ◽  
Mesoporous Catalysts ◽  
Volatile Organic ◽  
Noble Metal Oxides

Volatile organic compounds (VOCs) emitted from many industrial processes, are harmful to human health and the atmsphere. Several technologies are currently used to eliminate VOCs from the environment. Among them, catalytic oxidation has been recognized as one of the most efficient and promising ways to treatment VOCs. So high performance oxidants play an dominant role in the catalytic oxidation process. In this work, we discussed many researchers’ works about preparation and effect of their catalysts, kinds of mesoporous catalysts for eliminating VOCs were reviewed, the active components of the catalysts are noble and non-noble metal oxides, which loaded in the mesochannels of mesoporous materials including silica, titania and aluminia.

Sign in / Sign up

Export Citation Format

Share Document